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Johnson County, TN Weather And Climate Synopsis

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36 Hr. Forecast Map
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Weather Summary Hourly Observations Nowcast Agricultural Weather Outlook
7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts





US Weekly Rainfall Departure



US Weekly Temperature Departure
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A joint service of the UK Ag Weather Center and the National Weather Service.

National Weather Service Nashville TN
631 AM CDT Tue Apr 23 2024

...New AVIATION...

.SHORT TERM...
(Today through Wednesday)
Issued at 232 AM CDT Tue Apr 23 2024

As of 2 am CDT...skies across Middle Tennessee are mostly clear to 
partly cloudy as a band of high clouds moves through. Temperatures 
at this hour are primarily in the 40s though a few readings have 
dipped into the upper 30s towards the Cumberland Plateau. Winds are 
light across the region. At the surface, high pressure extended from 
the Gulf Coast, across the Southeastern US, and up the East Coast. A 
cold front was located from Wisconsin to Iowa and Nebraska, and it 
is this front that will slide southeast and bring us a chance for 
precipitation Tuesday night into early Wednesday. Aloft, zonal flow 
was located overhead while a shortwave trough was observed over the 
northern Plains, moving southeast and forcing the front towards 
Middle Tennessee.

For today, the main story will be warmer temperatures, dry 
conditions, and gusty winds. Afternoon highs should climb into the 
70s areawide. Moisture return is expected later today, as in more 
like this evening as moisture along the incoming cold front moves in 
from the northwest. This afternoon however, dewpoints should stay in 
the 30s and low 40s, which will lead to minimum relative humidity 
readings in the mid 20s to mid 30s. Combined with winds gusting to 
25, maybe 30 mph, there will be elevated fire weather conditions 
across Middle Tennessee. 

As the front approaches tonight, a broken band of precipitation 
should form and move into the area. While there could be a few 
rumbles of thunder with MUCAPE of 100-200 j/kg possible at most, 
more than likely all that will be observed is showers. No severe 
weather should be anticipated due to the lack of instability. In 
addition, the main forcing from the upper level disturbance will be 
moving across the Great Lakes, resulting in limited lift and thus 
the likelihood of scattered/a broken band of showers occuring versus 
a more widespread precipitation event along this front. Winds will 
weaken prior to the front arrival, and then remain weak yet shift to 
the north once the front has passed. With cloud cover in the region, 
low temperatures will remain much warmer than recent nights, only 
dropping into the low to mid 50s.

For Wednesday, the only main change compared to Tuesday's predicted 
weather will be a noticeable drop in wind speeds. Temperatures 
should be about the same despite the passage of a weak cold front. 
Some forecast guidance indicates a few showers into the day, mainly 
along the Cumberland Plateau. However, with most of the forcing 
having passed through the region already, am not certain we will 
observe much in the way of precipitation lingering after the
front.

National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

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Regional Hourly Observations For JOHNSON County
Issued at 900 AM CDT TUE APR 23 2024

NORTHEAST TENNESSEE
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
TRI CITIES     MOSUNNY   51  38  60 CALM      30.21S                  
ELIZABETHTON   SUNNY     52  36  54 CALM      30.20F                  
GREENEVILLE    SUNNY     54  32  43 CALM      30.19F                  

Current Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel


Current Agricultural Weather Conditions in Tennessee
Based on observations at 900am CDT, Tuesday April 23, 2024

Across Tennessee...temperatures are near 60 degrees west and near 60 degrees central. Current sky conditions are mostly sunny west and mostly sunny central. In the west, relative humidity is near 53%, and the dew point is near 43 degrees. In the central part of the state, relative humidity is near 42%, and the dew point is near 37 degrees. Winds are from the south at 13 mph west, where conditions are not favorable for spraying due to strong winds. Winds are from the south at 9 mph central, where conditions are favorable for spraying. Winds are unavailable east. Based on current available observations, the highest temperature is 61 degrees at Memphis NWS and Jackson. The lowest temperature is 57 degrees at Selmer, Lexington, Covington, and Bolivar.


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.

US Radar, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For JOHNSON County,TN

940 AM EDT Tue Apr 23 2024 /840 AM CDT Tue Apr 23 2024/

 DAY ONE  Today and 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 needed at this time.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For JOHNSON County, TN
939 AM EDT Tue Apr 23 2024

REST OF TODAY
Sunny. Not as cool with highs in the 60s to lower 70s. Southwest winds 10 mph or less with gusts up to 20 mph.

TONIGHT
Partly cloudy until early morning, then mostly cloudy with a chance of showers late. Lows in the upper 40s. Southwest winds 5 to 15 mph. Gusts up to 30 mph after midnight. Chance of rain 40 percent.

WEDNESDAY
Mostly cloudy with a chance of showers in the morning, then partly sunny with a slight chance of showers early in the afternoon. Mostly sunny late. Highs in the upper 50s to mid 60s. West winds 5 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

WEDNESDAY NIGHT
Mostly clear. Lows in the upper 30s to lower 40s. North winds 10 mph or less.

THURSDAY
Sunny. Highs in the 60s to lower 70s. Light winds.

THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the 40s.

FRIDAY
Partly sunny with a 20 percent chance of showers. Highs in the upper 50s and 60s.

FRIDAY NIGHT
Mostly cloudy. Lows in the upper 40s to lower 50s.

SATURDAY
Mostly cloudy in the morning, then partly sunny with a slight chance of showers in the afternoon. Highs in the mid 60s to mid 70s. Chance of rain 20 percent.

SATURDAY NIGHT
Mostly cloudy. Lows in the mid 50s.

SUNDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 60s and 70s. Chance of rain 20 percent.

SUNDAY NIGHT
Partly cloudy. Lows in the mid 50s.

MONDAY
Mostly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the 70s to lower 80s. Chance of rain 40 percent.

12-48 Hr Surface Forecast Maps, TWC 4-Panel Surface Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip, Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Tennessee
                            TENNESSEE                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                APR 28-MAY 2 APR 30-MAY 6    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:      Above       Normal                                            

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook

Almanac Information

Tuesday April 23, 2024 the 114th Day of Year

---------------------------------------------------
SUN
Declination 13.040000
Distance 0.999718 AU
Rise 07:02 EDT Set 20:28 EDT
Transit Meridian 13:44 EDT
Civil Twilight Begins 06:36 EDT Ends 20:54 EDT

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


Historical Weather And Climate Facts For Today

APRIL 23RD
HISTORIC WEATHER EVENTS
...1885...
The city of Denver CO was in the midst of a storm which produced 23 inches
of snow in 24 hours, and at Idaho Springs CO produced 32 inches of snow.
(David Ludlum)
...1910...
The temperature at the Civic Center in Los Angeles CA hit 100 degrees to
establish an April record for the city. (The Weather Channel)


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