Jefferson County, KY Weather and Hourly Weather


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Updated Tuesday Evening, August 22, 2017


...Rain chances increase today...

The focus as of 4 PM is on two bands of showers and storms progressing
to the SE ahead of a cold front. Activity will continue into the
overnight, before diminishing across Southeastern Kentucky tomorrow
morning. Could still see some strong to severe activity this afternoon
with damaging winds as the main threat. Otherwise, most can expect
a round of heavy rain with any passing storm.

Much cooler and drier air then filters into the area for the remainder of the
week. Highs in the middle 70s to low 80s and lows in the 50s will be common.


Kentucky State Forecast 






Western KY:



Central KY:



Eastern KY:







Specific and detailed farm-by-farm weather forecast information is available in your 
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 Current Conditions Kentucky, 
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Regional Hourly Observations For JEFFERSON County, Kentucky
Issued at 800 PM EDT TUE AUG 22 2017
NORTH CENTRAL KENTUCKY CITY SKY/WX TMP DP RH WIND PRES REMARKS LOUISVILLE/SDF MOCLDY 75 71 87 W6 29.93S LOUISVILLE/LOU CLOUDY 74 73 97 SW3 29.94S FORT KNOX CLOUDY 72 72 99 CALM 29.93F

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 800pm EDT, Tuesday August 22, 2017

Across Kentucky...temperatures are near 82 degrees west, near 73 degrees central, and near 74 degrees east. Current sky conditions are mostly cloudy west, mostly cloudy central, and cloudy east. In the west, relative humidity is near 62%, and the dew point is near 68 degrees. In the central part of the state, relative humidity is near 90%, and the dew point is near 70 degrees. In the east, relative humidity is near 93%, and the dew point is near 72 degrees. Current drying conditions are fair west, poor central, and poor east. The livestock heat stress category is no stress west, no stress central, and no stress east. Winds are from the north at 8 mph west, where conditions are favorable for spraying. Winds are from the south at 6 mph central, where conditions are favorable for spraying. Winds are calm east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 82 degrees at Paducah. The lowest temperature is 72 degrees at Frankfort and Fort Knox.
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: Tue Aug 22 19:47:51 EDT 2017

Elizabethtown, Shepherdsville, Louisville, La Grange, Bedford, Milton, New Castle, Shelbyville, Frankfort, Georgetown, Cynthiana, Taylorsville, Lawrenceburg, Versailles, Lexington, Paris, Bardstown, Springfield, Harrodsburg, Nicholasville, Winchester, Hodgenville, Lebanon, Danville, Morgantown, Brownsville, Horse Cave, Greensburg, Campbellsville, Russellville, Bowling Green, Franklin, and Providence 747 PM EDT Tue Aug 22 2017 /647 PM CDT Tue Aug 22 2017/ 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...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected. && 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 -

THURSDAY :
Highs across the state will range from 80 West and 79 Central, to 74 East. Dewpoints will range from 56 to 58 West, 56 to 52 Central, and 57 to 56 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 20 % of the area East should be expected. Lows Thursday will fall to 58 West, 60 Central, and 58 East. Skies throughout the day will start out clear and end clear in the West, start clear and end clear Central, and start out clear and end partly cloudy East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 19 corn growing degree days West, 20 Central, and 16 East. Wind speeds in the morning and afternoon will be around 8 and 8 mph , respectively, West, 9 and 11 mph Central, and 2 and 4 mph East.
FRIDAY :
Highs across the state will range from 80 West and 79 Central, to 74 East. Dewpoints will range from 55 to 56 West, 53 to 51 Central, and52 to 51 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 10 % of the area West, 0.00-0.01 inches over 10 % of the area Central, and 0.00-0.01 inches over 10 % of the area East should be expected. Lows Friday will fall to 58 West, 58 Central, and 55 East. Skies throughout the day will start out clear and end partly cloudy in the West, start clear and end clear Central, and start out clear and end clear East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 19 corn growing degree days West, 18 Central, and 14 East. Wind speeds in the morning and afternoon will be around 7 and 11 mph , respectively, West, 10 and 8 mph Central, and 2 and 1 mph East.
SATURDAY :
Highs across the state will range from 81 West and 78 Central, to 74 East. Dewpoints will range from 56 to 58 West, 55 to 54 Central, and 53 to 57 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 10 % of the area West, 0.00-0.01 inches over 10 % of the area Central, and 0.00-0.01 inches over 10 % of the area East should be expected. Lows Saturday will fall to 59 West, 59 Central, and 57 East. Skies throughout the day will start out partly cloudy and end clear in the West, start partly cloudy and end partly cloudy Central, and start out clear and end partly cloudy East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 20 corn growing degree days West, 18 Central, and 16 East. Wind speeds in the morning and afternoon will be around 7 and 9 mph , respectively, West, 7 and 10 mph Central, and 1 and 1 mph East.
SUNDAY :
Highs across the state will range from 80 West and 79 Central, to 76 East. Dewpoints will range from 57 to 61 West, 55 to 55 Central, and56 to 60 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 30 % of the area East should be expected. Lows Sunday will fall to 59 West, 59 Central, and 59 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 partly cloudy East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 20 corn growing degree days West, 19 Central, and 18 East. Wind speeds in the morning and afternoon will be around 7 and 9 mph , respectively, West, 9 and 9 mph Central, and 1 and 1 mph East.
MONDAY :
Highs across the state will range from 78 West and 80 Central, to 78 East. Dewpoints will range from 61 to 65 West, 57 to 59 Central, and 59 to 61 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 40 % of the area West, 0.00-0.01 inches over 30 % of the area Central, and 0.00-0.01 inches over 40 % of the area East should be expected. Lows Monday will fall to 62 West, 62 Central, and 60 East. Skies throughout the day will start out cloudy and end cloudy in the West, start partly cloudy and end partly cloudy Central, and start out cloudy and end partly cloudy East. The maximum livestock stress category will be no stress West, no stress Central, and no stress East. There will be 20 corn growing degree days West, 21 Central, and 19 East. Wind speeds in the morning and afternoon will be around 7 and 12 mph , respectively, West, 9 and 8 mph Central, and 1 and 1 mph East.
TUESDAY :
Highs across the state will range from 77 West and 79 Central, to 77 East. Dewpoints will range from 59 to 63 West, 57 to 59 Central, and 59 to 60 East throughout the day. Rainfall amounts of 0.00-0.01 inches over 50 % of the area West, 0.00-0.01 inches over 50 % of the area Central, and 0.00-0.01 inches over 40 % of the area East should be expected. Lows Tuesday will fall to 61 West, 62 Central, and 60 East. Skies throughout the day will start out cloudy and end cloudy 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 19 corn growing degree days West, 20 Central, and 18 East. Wind speeds in the morning and afternoon will be around 11 and 19 mph, respectively, West, 19 and 23 mph Central, and 9 and 15 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 AUG 28-SEP 1 AUG 30-SEP 5 AUG AUG-OCT ----------- ----------- -------- --------- Temperature: Below Below Above Above Precipitation: Above Above Normal Normal .... 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: NEAR NORMAL (PDSI= 0.45) Rainfall Needed: 0.00 inches ABOVE NORMAL Crop Moisture (CMI) Situation: ---------------------------------------------------------------------------------------------------------- Current Short-term Crop Moisture Status: Favorable For Normal Growth And Fieldwork (CMI= 0.17) Change From Previous Week: DRIER SOILS ( -0.21)
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 89 in the West to 86 in the East. Departure from normal high temperatures ranged from +2 degrees from normal in the West to +2 degrees from normal in the East. Low temperatures averaged from 69 degrees in the West to 68 degrees in the East. Departure from normal low temperature ranged from +5 degrees from normal in the West to +6 degrees from normal in the East.
Precipitation (liq. equ.) for the period totaled 0.98 inches statewide which was + 0.14 inches from normal. Precipitation totals by climate division, West 0.49 inches, Central 0.91 inches, Bluegrass 0.99 inches and East 1.37 inches, which was -0.30, + 0.05, + 0.13 and + 0.51 inches respectively from normal. By station, precipitation totals ranged from a low of 0 inches at Mayfield to a high of 2.99 inches at Berea.
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)
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
Tuesday August 22, 2017 the 234th Day of Year --------------------------------------------------- SUN Declination 11.370000 Distance 0.999717 AU Rise 07:00 EDT Set 20:21 EDT Transit Meridian 13:41 EDT Civil Twilight Begins 06:34 EDT Ends 20:48 EDT --------------------------------------------------- Normal Max/Min Temperature for Today: 85 / 62 --------------------------------------------------- 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

///////////////////////////// AUGUST 22ND...HISTORIC WEATHER EVENTS ...1816... The growing season for corn was cut short as damaging frosts were reported from North Carolina to interior New England. (David Ludlum) ...1923... The temperature at Anchorage AK reached 82 degrees, a record for August for the location which was later tied on the 2nd in 1978. (The Weather Channel) ...1987... A cold front lowered temperatures 20 to 40 degrees across the north central U.S., and produced severe thunderstorms in Ohio and Lower Michigan. An early morning thunderstorm near Sydney MI produced high winds which spun a car around 180 degrees. (The National Weather Summary) (Storm Data) ...1988... Afternoon highs of 88 degrees at Astoria OR and 104 degrees at Medford OR were records for the date, and the number of daily record highs across the nation since the first of June topped the 2000 mark. (The National Weather Summary) ...1989... Evening thunderstorms in the central U.S. produced golf ball size hail at May City IA, and wind gusts to 66 mph at Balltown IA. Lightning struck a barn in Fayette County IA killing 750 hogs. Evening thunderstorms in Montana produced wind gusts to 70 mph at Havre. (The National Weather Summary) (Storm Data)
UKAWC Briefing Page

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