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Jefferson County, IA Weather and Climate Synopsis

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

Weather Summary for Iowa
National Weather Service Des Moines IA
1048 AM CST Sun Feb 18 2018

Conditions were relatively quiet across Iowa overnight. Low 
temperatures ranged from the upper teens into the mid 20s. 
Southeasterly winds slowly increased in speed during the night and 
into the morning, which also helped sustain warm temperatures. Into 
early morning, skies were mostly clear with a few scattered clouds 
across portions of central Iowa. As temperatures rise, the winds have 
picked up drastically across the state. Winds have been south at 20 to
30 miles per hour, with several gusts near 45 miles per hour 

Across the rest of the Midwest, southerly winds have sustained warmer
temperatures. Cloud cover has been scattered across most of the

Temperatures are forecast to be in mid 40s across much of Iowa this
afternoon. Locations in southern Iowa will likely hit 50 degrees. The
main story for this afternoon however will the be the winds. Winds
will be southerly most of the day at 25 to 30 miles per hour, with
gusts near 45 miles per hour. The main forecast concern this evening
is for Northwest Iowa. An approaching system will bring precipitation
to northwest Iowa late this evening, and throughout Monday morning. 
With freezing temperatures close to the surface and road temperatures 
below freezing, this precipitation will be freezing rain. This will 
make for hazardous travel late this evening and throughout Monday 
morning across most of northwest Iowa. On Monday, central and 
southeast Iowa will see mostly rain. A few thunderstorms are possible.
Then Monday night into Tuesday morning, round two of freezing rain 
will impact much of central, east-central, and northeastern Iowa. Ice 
accumulations due to freezing rain will make for hazardous travel in 
this area Monday night through Tuesday morning. Depending on the exact
amount of ice accumulation, even treated roads could still be very 

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

Precision Agriculture Weather Forecast For JEFFERSON County

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Regional Hourly Observations For JEFFERSON County
Issued at 1100 AM CST SUN FEB 18 2018

BURLINGTON     CLOUDY    40  29  64 S17G23    30.10F WCI  31          
FAIRFIELD *    CLOUDY    41  28  60 S21       30.04F                  
FORT MADISON * CLOUDY    39  34  81 S17       30.10F WCI  30          
KEOKUK *       CLOUDY    43  30  61 S12G20    30.10F                  
OSKALOOSA *    FAIR      39  31  73 S22       29.99F WCI  28          
OTTUMWA        CLOUDY    43  30  60 S25       30.00F                  
WASHINGTON *   CLOUDY    39  34  81 S13G21    30.07S WCI  32          

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

Current Agricultural Weather Conditions in Iowa
Based on observations at 1100am CST, Sunday February 18, 2018

Across Iowa...temperatures are near 42 degrees west, near 47 degrees central, and near 34 degrees east. Current sky conditions are cloudy west, cloudy central, and fair east. In the west, relative humidity is near 57%, and the dew point is near 28 degrees. In the central part of the state, relative humidity is near 49%, and the dew point is near 29 degrees. In the east, relative humidity is near 72%, and the dew point is near 26 degrees. Winds are from the south at 33 mph with gusts at 43 mph west, where conditions are not favorable for spraying due to strong winds. Winds are from the south at 26 mph with gusts at 36 mph central, where conditions are not favorable for spraying due to strong winds. Winds are from the southeast at 16 mph east, where conditions are not favorable for spraying due to strong winds. The wind chill is near 24 degrees east. The livestock cold stress index is in the no stress category west, no stress category central, and no stress category east. Based on current available observations, the highest temperature is 48 degrees at Clarinda. The lowest temperature is 28 degrees at Dubuque.

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 JEFFERSON County,IA

1126 AM CST Sun Feb 18 2018


Strong south winds are expected this afternoon with gusts up to 40
mph possible. 

Tonight, fog is possible and may be dense toward morning, 
especially north of Interstate 80. Thunderstorms are also possible
late tonight into early Monday morning. These will be most likely
south of Interstate 80 and the main threat from thunderstorms will
be lightning. 


There is a chance of thunderstorms on Monday and Tuesday. Due to
limited instability severe thunderstorms are not expected at this

Heavy rain is possible Monday morning through Tuesday night with
amounts of 1 to 2 inches possible. These may lead to rises on area
rivers. In addition to the rainfall, ice jams as the rivers rise
may lead to further rises in area rivers. A river flood watch has
been issued for the Rock River at Joslin and Moline due to a 
forecast of moderate flooding. Please see the latest river 
forecasts and watches for the most up to date information. 

Late Monday night into Tuesday morning light accumulations of
freezing rain are possible northwest of a line from Cedar Rapids
to Dubuque. 


Spotter activation will not be needed today or tonight. 

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For JEFFERSON County, IA
1113 AM CST Sun Feb 18 2018

Brisk. Not as cool. Partly sunny. High in the lower 50s. South wind 15 to 25 mph with gusts to around 40 mph.

Not as cool. Partly cloudy in the evening, then cloudy with light rain after midnight. Low around 40. South wind 10 to 15 mph. Gusts up to 25 mph in the evening. Chance of rain 90 percent.

Light rain and a slight chance of thunderstorms. High in the lower 60s. South wind 10 to 15 mph with gusts to around 30 mph. Chance of rain 90 percent.

Rain and a slight chance of thunderstorms in the evening, then light rain after midnight. Low in the upper 30s. Northwest wind 5 to 10 mph. Chance of rain 90 percent.

Cooler, rain. High in the mid 40s. Northwest wind 10 to 15 mph. Chance of rain 90 percent.

Much colder. Mostly cloudy with a 30 percent chance of freezing rain possibly mixed with rain and snow in the evening, then partly cloudy after midnight. Low around 17.

Colder. Partly cloudy. High around 30. Low around 19.

Mostly sunny. High in the upper 30s.

Mostly cloudy. Low in the upper 20s.

Mostly cloudy. Snow possibly mixed with rain in the morning, then a chance of rain in the afternoon. High in the mid 40s. Chance of precipitation 60 percent.

Mostly cloudy. A chance of rain in the evening, then a chance of snow possibly mixed with rain after midnight. Low in the lower 30s. Chance of precipitation 50 percent.

Partly sunny. High in the mid 40s.

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 Iowa
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   FEB 23-27 FEB 25-MAR 3    FEB       FEB-APR                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above     Normal      Below                      
 Precipitation:      Above        Above     Normal      Above                      

....  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

Sunday February 18, 2018 the 49th Day of Year

Declination -11.270000
Distance 0.999723 AU
Rise 08:05 EST Set 18:51 EST
Transit Meridian 13:27 EST
Civil Twilight Begins 07:37 EST Ends 19:19 EST

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

While much of the central and eastern U.S. was recovering from the most
severe cold wave of modern history, the temperature at San Francisco soared
to 80 degrees to establish a record for month of February. (David Ludlum)
Some of the higher elevations of California were in the midst of a five day
storm which produced 189 inches of snow, a single storm record for North
America. (13th-19th) (David Ludlum)
A small but intense low pressure system combined with northerly upslope
winds to produce eight inches of snow in five hours at Meeteetsie WY,
located southeast of Cody. (The National Weather Summary) (Storm Data)
Thunderstorms soaked the Central Gulf Coast Region with heavy rain. Totals
in southern Louisiana ranged up to 8.50 inches near the town of Ridge, with
6.55 inches at Plaguemine. Thunderstorms in northern Florida drenched
Apalachicola with 5.41 inches of rain in 24 hours, and produced wind gusts
to 75 mph at Mayo. (The National Weather Summary) (Storm Data)
Low pressure off the coast of North Carolina brought freezing rain and
heavy snow to Virginia and the Carolinas. Snowfall totals in Virginia
ranged up to 18 inches at Franklin. Freezing rain reached a thickness of
two inches around Charlotte NC. (The National Weather Summary) (Storm Data)
An intense but slow moving Pacific storm worked its way across Utah over a
two day period. The storm blanketed the valleys with 4 to 12 inches of
snow, and produced up to 42 inches of snow in the mountains. Heavy snow
also fell across northern Arizona. Williams received 22 inches of snow, and
12 inches was reported along the south rim of the Grand Canyon. (The
National Weather Summary) (Storm Data)

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