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Jefferson County, KY Weather And Climate Synopsis

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Precipitation Report Kentucky Climate Summary GIS Estimates Almanac Precision Ag., Lawn & Garden Forecast Historical Facts




Soil Moisture Anomaly Loop



Current Spraying Conditions
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A joint service of the UK Ag Weather Center and the National Weather Service.


Updated Monday Morning, April 12, 2021

...Mostly dry, cooler week ahead...

As of 10AM, mostly cloudy skies remain across the NE portion of KY, while the rest of the state is seeing sunny skies. Look for these clouds to push off to the east later this afternoon. Highs will jump into the middle 60s to middle 70s, highest across Western/West-Central KY and lowest across the NE.

Outside of some light isolated to scattered rain showers tomorrow, the rest of the week looks to run mostly dry and cooler. Highs will run in the 60s and lows will run in the 40s most of the time. Saying that, portions of the eastern half of the state could see some middle 30s mix into the forecast on Thursday and Friday morning, introducing the possibility of some patchy frost.

Outlooks keep this cooler and drier trend in place through the 3rd week of April.

Now is the time to be scouting alfalfa weevil. Most of the state has now exceeded 190 degree days. More information on when and how to scout the pest can be found here. A map showing insect degree day accumulations for alfalfa weevil can be accessed here.

Wheat specialists also say now is the time to scout for any freeze damage after lows in the 20s about a week and a half ago. More info here.

USDA's Ag Weather:National Ag. Weather Outlook, International Ag. Weather Summary , Next Weather Event?
Current Surface Map, Regional, Composite, TWC, Yesterday's Highs, Lows ,
Upper Air


Regional Hourly Observations For JEFFERSON County, Kentucky
Issued at 900 PM EDT MON APR 12 2021
NORTH CENTRAL KENTUCKY
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
LOUISVILLE/SDF PTCLDY    64  40  41 NW8       29.94R                  
LOUISVILLE/LOU CLEAR     63  40  42 W6        29.94R                  
FORT KNOX      CLEAR     60  44  55 CALM      29.94R                  

KY Round-up, Current Temperatures, Dewpoint, Rh, Wind, Regional Obs., Station Model, Surface 4-Panel, NWS Louisville
Meteograms: Paducah , Evansville , Bowling Green , Hopkinsville , Frankfort , Louisville , Lexington , Covington , Jackson , London , Shelby Co. Weather , Spindletop Research Weather Station , Woodford Co. Research Weather Station , About Meteograms


Current Agriculture, Lawn & Garden Weather Conditions in Kentucky
Based on observations at 900pm EDT, Monday April 12, 2021

Across Kentucky...temperatures are near 62 degrees west, near 60 degrees central, and near 62 degrees east. Current sky conditions are partly cloudy west, clear central, and clear east. In the west, relative humidity is near 64%, and the dew point is near 50 degrees. In the central part of the state, relative humidity is near 49%, and the dew point is near 41 degrees. In the east, relative humidity is near 42%, and the dew point is near 39 degrees. Current drying conditions are fair west, good central, and good east. Winds are calm west, where conditions are favorable for spraying. Winds are from the northwest at 3 mph central, where conditions are favorable for spraying. Winds are variable at 3 mph east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 66 degrees at Hopkinsville. The lowest temperature is 60 degrees at Lexington, Fort Knox, and Covington.

List of Agriculture, Lawn & Garden Weather Observations in Kentucky


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

UKAWC Radar, NWS Radar (NEW!), SPC Radar, Regional Radar, SkyWarn, NEXRAD, LSI Heat Index
Hazardous Weather Outlook For JEFFERSON County, Kentucky
Issued at: Mon Apr 12 14:50:33 EDT 2021

English, Tell City, Corydon, New Albany, Jeffersonville, Lewisport, 
Hawesville, Hardinsburg, Brandenburg, Hartford, Leitchfield, 
Elizabethtown, Shepherdsville, Louisville, La Grange, Bedford, 
Milton, New Castle, Shelbyville, Frankfort, Georgetown, Cynthiana, 
Taylorsville, Lawrenceburg, Versailles, Lexington, Paris, Carlisle, 
Bardstown, Springfield, Harrodsburg, Nicholasville, Winchester, 
Hodgenville, Lebanon, Danville, Lancaster, Richmond, Morgantown, 
Brownsville, Horse Cave, Greensburg, Campbellsville, Liberty, 
Stanford, Russellville, Bowling Green, Franklin, Providence, 
Scottsville, Glasgow, Tompkinsville, Edmonton, Columbia, Jamestown, 
Burkesville, and Albany
250 PM EDT Mon Apr 12 2021 /150 PM CDT Mon Apr 12 2021/

This hazardous weather outlook is for portions of south central
Indiana and Central Kentucky.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Patchy frost is possible Thursday and Friday morning in portions of 
Southern Indiana and Central Kentucky.


.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

&&

More information, along with other weather, hydrological and
climate information can be found, at weather.gov/louisville.

NWS Severe Weather Map , Convective Outlook


RDF forecast not available NEW NWS Experimental Weather Activity Planner: West, Central, East
NWS Experimental Point Forecasts (5 km x 5 km grid for Kentucky): West, Central, East

JEFFERSON County, Kentucky Agriculture, Lawn & Garden Weather Advisory

Updated: 310 AM EST THU NOV 12 2009

TODAY (6AM-5PM)

Max Temperature...........................61 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................29 to 34 Degrees.
Min RH (Relative Humidity).........37%.
Wind Speed....................................4 to 10 mph
Winds@3 PM..................................northeast at 10 mph
Spraying Conditions....................favorable
Sky Conditions @9 AM ...............mostly sunny.
RH < 50%........................................ for 7 hours
RH > 80%.........................................for 0 hour
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The high today (6am-5pm) in Jefferson county, is expected to be near 61 degrees. No rainfall is expected. Temperature will range from near 39 to near 60 degrees. Dewpoints will range from 29 to 34 degrees. These dewpoints will combine with today (6am-5pm)'s temperatures resulting in relative humidity minimum of 37%. Skies will be mostly sunny at 9 AM and mostly sunny at 3 PM. Wind speed will range from 4 to 10 mph during the period. Winds at 3 PM will be out of the northeast at 10 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 7 hours and greater than 80% for 0 hour

TONIGHT (6PM-5AM)

Min Temperature...........................38 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................near 34 Degrees.
Max RH (Relative Humidity)........76%.
Wind Speed....................................2 to 8 mph
Winds@3 AM..................................northeast at 3 mph
Spraying Conditions....................favorable
Sky Conditions @12 AM .............clear.
Sky Conditions @3 AM ...............clear.
RH < 50%........................................ for 1 hour
RH > 80%.........................................for 0 hour
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The low tonight (6pm-5am) in Jefferson county, is expected to be around 38 degrees. No rainfall is expected. Temperature will range from near 41 to near 53 degrees. Dewpoints will be near 34 degrees. These dewpoints will combine with tonight (6pm-5am)'s temperatures resulting in relative humidity maximum of 76%. Skies will be clear at 12 AM and clear at 3 AM. Wind speed will range from 2 to 8 mph during the period. Winds at 3 AM will be out of the northeast at 3 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 1 hour and greater than 80% for 0 hour

TOMORROW (6AM-5PM)

Max Temperature...........................64 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................34 to 42 Degrees.
Min RH (Relative Humidity).........41%.
Wind Speed....................................2 to 5 mph
Winds@3 PM..................................southeast at 3 mph
Spraying Conditions....................favorable
Sky Conditions @9 AM ...............mostly sunny.
Sky Conditions @3 PM ...............mostly sunny.
RH < 50%........................................ for 5 hours
RH > 80%.........................................for 2 hours
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The high tomorrow (6am-5pm) in Jefferson county, is expected to be near 64 degrees. No rainfall is expected. Temperature will range from near 41 to near 64 degrees. Dewpoints will range from 34 to 42 degrees. These dewpoints will combine with tomorrow (6am-5pm)'s temperatures resulting in relative humidity minimum of 41%. Skies will be mostly sunny at 9 AM and mostly sunny at 3 PM. Wind speed will range from 2 to 5 mph during the period. Winds at 3 PM will be out of the southeast at 3 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 5 hours and greater than 80% for 2 hours

TOMORROW NIGHT (6PM-5AM)

Min Temperature...........................46 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................42 to 44 Degrees.
Max RH (Relative Humidity)........89%.
Wind Speed....................................2 to 3 mph
Winds@3 AM..................................south at 2 mph
Spraying Conditions....................favorable
Sky Conditions @12 AM .............mostly clear.
Sky Conditions @3 AM ...............mostly clear.
RH < 50%........................................ for 0 hour
RH > 80%.........................................for 3 hours
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The low tomorrow night (6pm-5am) in Jefferson county, is expected to be around 46 degrees. No rainfall is expected. Temperature will range from near 47 to near 59 degrees. Dewpoints will range from 42 to 44 degrees. These dewpoints will combine with tomorrow night (6pm-5am)'s temperatures resulting in relative humidity maximum of 89%. Skies will be mostly clear at 12 AM and mostly clear at 3 AM. Wind speed will range from 2 to 3 mph during the period. Winds at 3 AM will be out of the south at 2 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 0 hour and greater than 80% for 3 hours

72 HOUR SUMMARY

The temperature is expected to be in the range from 38 degrees and 67 degrees. Dewpoints will range from 29 to 47 degrees. No measurable precipitation is expected.


Ag. Weather Forecast Parameter Maps:Spraying Conditions , Dewpoint Temperatures, Livestock Heat Stress


Extended Digital forecast not available
Current FORECAST not available TWC Forecast, NWS Maps, Fire Danger, Day 1 Precip, Day 2, 5 Day Total, Days 1-5
NGM 60 Hr Forecast Meteograms: Paducah , Evansville , Bowling Green , Hopkinsville , Frankfort , Louisville , Lexington , Covington , Jackson , London, All Kentucky Hourly Model Guidance, About NGM Forecast Meteograms

Kentucky Agricultural Weather Medium-Range Outlook (Based on the MEX Model)

MEDIUM RANGE AG FORECAST:

- Click here for Graphical Ag. Weather Forecast -

WEDNESDAY :
Highs across the state will range from 93 West and 90 Central, to 87 East. Dewpoints will range from 73 to 74 West, 72 to 71 Central, and 67 to 69 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 40 % of the area West, 0.10-0.24 inches over 60 % of the area Central, and 0.00-0.01 inches over 40 % of the area East should be expected. Lows Wednesday will fall to 72 West, 75 Central, and 69 East. Skies throughout the day will start out partly cloudy and end partly cloudy in the West, start partly cloudy and end partly cloudy Central, and start out partly cloudy and end partly cloudy East. The maximum livestock stress category will be danger West, danger Central, and danger East. There will be 29 corn growing degree days West, 30 Central, and 28 East. Wind speeds in the morning and afternoon will be around 3 and 4 mph , respectively, West, 6 and 6 mph Central, and 0 and 0 mph East.

THURSDAY :
Highs across the state will range from 91 West and 91 Central, to 86 East. Dewpoints will range from 73 to 73 West, 72 to 71 Central, and69 to 70 East throughout the day. Rainfall amounts of 0.01-0.09 inches over 40 % of the area West, 0.01-0.09 inches over 50 % of the area Central, and 0.01-0.09 inches over 60 % of the area East should be expected. Lows Thursday will fall to 73 West, 76 Central, and 69 East. Skies throughout the day will start out partly cloudy and end partly cloudy in the West, start partly cloudy and end partly cloudy Central, and start out partly cloudy and end partly cloudy East. The maximum livestock stress category will be danger West, danger Central, and danger East. There will be 30 corn growing degree days West, 31 Central, and 28 East. Wind speeds in the morning and afternoon will be around 3 and 6 mph , respectively, West, 6 and 6 mph Central, and 0 and 2 mph East.

FRIDAY :
Highs across the state will range from 86 West and 91 Central, to 85 East. Dewpoints will range from 71 to 70 West, 72 to 70 Central, and 69 to 70 East throughout the day. Rainfall amounts of 0.25-0.49 inches over 60 % of the area West, 0.10-0.24 inches over 60 % of the area Central, and 0.10-0.24 inches over 60 % of the area East should be expected. Lows Friday will fall to 72 West, 75 Central, and 70 East. Skies throughout the day will start out partly cloudy and end cloudy in the West, start partly cloudy and end cloudy Central, and start out partly cloudy and end partly cloudy East. The maximum livestock stress category will be danger West, danger Central, and no stress East. There will be 29 corn growing degree days West, 30 Central, and 28 East. Wind speeds in the morning and afternoon will be around 4 and 7 mph , respectively, West, 6 and 8 mph Central, and 0 and 1 mph East.

SATURDAY :
Highs across the state will range from 86 West and 86 Central, to 81 East. Dewpoints will range from 67 to 66 West, 68 to 65 Central, and68 to 67 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 20 % of the area West, 0.10-0.24 inches over 50 % of the area Central, and 0.50-0.99 inches over 80 % of the area East should be expected. Lows Saturday will fall to 67 West, 72 Central, and 68 East. Skies throughout the day will start out partly cloudy and end clear in the West, start cloudy and end cloudy Central, and start out cloudy and end cloudy East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 26 corn growing degree days West, 29 Central, and 24 East. Wind speeds in the morning and afternoon will be around 8 and 14 mph , respectively, West, 6 and 15 mph Central, and 1 and 3 mph East.

SUNDAY :
Highs across the state will range from 87 West and 86 Central, to 79 East. Dewpoints will range from 65 to 67 West, 63 to 61 Central, and 63 to 63 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 10 % of the area West, 0.00-0.01 inches over 20 % of the area Central, and 0.00-0.01 inches over 40 % of the area East should be expected. Lows Sunday will fall to 66 West, 68 Central, and 64 East. Skies throughout the day will start out clear and end clear in the West, start partly cloudy and end partly cloudy Central, and start out cloudy and end cloudy East. The maximum livestock stress category will be danger West, no stress Central, and no stress East. There will be 26 corn growing degree days West, 27 Central, and 22 East. Wind speeds in the morning and afternoon will be around 13 and 6 mph , respectively, West, 15 and 15 mph Central, and 3 and 4 mph East.

MONDAY :
Highs across the state will range from 90 West and 87 Central, to 82 East. Dewpoints will range from 68 to 69 West, 65 to 64 Central, and 63 to 66 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 20 % of the area West, 0.00-0.01 inches over 20 % of the area Central, and 0.00-0.01 inches over 40 % of the area East should be expected. Lows Monday will fall to 68 West, 69 Central, and 64 East. Skies throughout the day will start out partly cloudy and end partly cloudy in the West, start partly cloudy and end partly cloudy Central, and start out partly cloudy and end partly cloudy East. The maximum livestock stress category will be danger West, no stress Central, and no stress East.There will be 27 corn growing degree days West, 28 Central, and 23 East. Wind speeds in the morning and afternoon will be around 4 and 8 mph, respectively, West, 12 and 10 mph Central, and 2 and 1 mph East.

Raw Data: MEX(west), MEX(central), MEX(east)

* NOTE: See specific site Ag Wx Data and Summary files for further information.

Graphic Regional Ag. Weather Outlook, Tabular data for the Medium Range Outlook


Medium & Long Range Outlook For Kentucky
                             KENTUCKY                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   APR 18-22    APR 20-26    APR       APR-JUN                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below      Above      Above                      
 Precipitation:      Below        Below     Normal      Above                      

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
UKAWC 8 Day Forecast Maps, TWC Jet, 15-Day Jet,Trend, Max/Mins (80k)
6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook


Precipitation Report: (liquid equivalent)

Total Precipitation and Deviation From Normal (in inches)
Valid May 27, 2012

The nearest available weather station for Jefferson County is Louisville:

                      Past 7 days      Past 30 days   Jan 1 - Present
Station             Total     Dev     Total     Dev     Total     Dev
---------------     -----  ------     -----  ------    ------  ------
Louisville           0.00   -1.04      4.72   +0.28     18.26   -0.66
List of Kentucky Weather Stations (1st Order & Ag. stations) Rainfall
UKAWC Regional Ag Weather Summary (Select Format): Spring , Summer , Fall

Drought Status For JEFFERSON County, Kentucky
(Based on the latest Palmer Drought Severity and Crop Moisture Indices)
CENTRAL   KY CLIMATE DIVISION

Hydrological Drought (PDSI) Situation:
------------------------------------------------------------------------------------

Current Long-term Hydrological Moisture Status: UNUSUAL MOIST SPELL   (PDSI=   2.79)
Rainfall Needed:  0.00 inches ABOVE NORMAL


Crop Moisture (CMI) Situation:
----------------------------------------------------------------------------------------------------------

Current Short-term Crop Moisture Status: More Dry Weather Needed, Work Delayed        (CMI=   2.18)
Change From Previous Week: DRIER      SOILS ( -0.44)

Note: Due to rainfall variability within each climate division, check Precip Reports/GIS Estimates and the Kentucky Climate Summary for the latest moisture information for this county.

Additional Drought Info.: UKAWC Drought Page


Kentucky Climate Summary
normal. High temperatures averaged from 76 in the West to 74 in the East. Departure from normal high temperatures ranged from +7 degrees from normal in the West to +11 degrees from normal in the East. Low temperatures averaged from 53 degrees in the West to 50 degrees in the East. Departure from normal low temperature ranged from +9 degrees from normal in the West to +8 degrees from normal in the East.

Precipitation (liq. equ.) for the period totaled 0.85 inches statewide which was -0.13 inches from normal. Precipitation totals by climate division, West 0.76 inches, Central 0.84 inches, Bluegrass 0.83 inches and East 0.95 inches, which was -0.31, -0.18, -0.11 and + 0.05 inches respectively from normal. By station, precipitation totals ranged from a low of 0.26 inches at Henderson to a high of 1.89 inches at Somerset.

Kentucky Climate Summaries: Last 3 days, 7 days, 14 days, 21 days, 30 days
Yesterday's Weather Data, Kentucky Climate Analysis, Kentucky Climate in Review (2005)


EUROPEAN CORN BORER not available
European Corn Borer Accumulation Map


ALFALFA WEEVIL not available
Alfalfa Weevil Accumulation Map


WESTERN CORN ROOTWORM not available
Western Corn Rootworm Accumulation Map


GIS ESTIMATES FOR JEFFERSON COUNTY
Valid July 29, 2013

The GIS estimates are derived by ARC/INFO GIS software for a
central point in the county.  The estimates are calculated from
from 29 weather stations in the Kentucky area.

Precipitation Estimates

                     Last 3   Last 7   Last 14   Last 30     Since
                       Days     Days      Days      Days     Jan 1
_______________________________________________________________________________
Precip Total           0.03     1.89      2.16      5.77     28.78
Precip Deviation      -0.41     0.87      0.13      1.47      1.66

Temperature Estimates

                     Last 3        Last 7       Last 14       Last 30
                       Days          Days          Days          Days
_____________________________________________________________________
Temp Average             71            74            79            77
Temp Deviation           -5            -2             3             1

Soil Temperature Estimates

                                Yesterday
_________________________________________
Avg 4" Sod Soil Temp   	               76

European Corn Borer Degree Days Accumulations

Degree Days                      Forecasted Accumulations
      Total          550      610      750     1660     1740
____________________________________________________________
       2140         5/10     5/13     5/21     6/28      7/1

Almanac Information
Monday April 12, 2021 the 102th Day of Year

---------------------------------------------------
SUN
Declination 9.140000
Distance 0.999719 AU
Rise 07:06 EDT Set 20:13 EDT
Transit Meridian 13:38 EDT
Civil Twilight Begins 06:40 EDT Ends 20:38 EDT

---------------------------------------------------
Normal Max/Min Temperature for Today: 67 / 44
---------------------------------------------------


Calculations made for central point in Kentucky
Time in ET -- and will vary due to location and
elevation -- Priddy

Sunrise/Sunset/Moonrise/Moonset Computation (USN)
TEMPERATURE is not available
Yesterday's U.S. Highs, Lows , KY's Highs/Lows/Precip, Daily Weather Data, Hourly Weather Data
Historical Weather And Climate Facts For Today
APRIL 12TH
HISTORIC WEATHER EVENTS
...1927...
A tornado wiped out the town of Rock Springs TX killing 72 persons and
causing 1.2 million dollars damage. The tornado, more than one mile in
width, destroyed 235 of 247 buildings, leaving no trace of lumber or
contents in many cases. Many survivors were bruised by large hail which
fell after the passage of the tornado. (David Ludlum) (The Weather Channel)
...1934...
Winds atop Mount Washington NH averaged 186 mph for five minutes, with a
peak gust of 231 mph, the highest wind speed ever clocked in the world.
(David Ludlum)
...2001...
A record high temperature of 85 degrees was recorded at the Jackson Weather 
Office.

UKAWC Briefing Page

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky