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Jefferson County, IA Weather and Climate Synopsis

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Weather Summary for Iowa
National Weather Service Des Moines IA
516 PM CDT Thu Aug 16 2018

A low pressure system brought rain showers and thunderstorms to much
of Iowa this afternoon. By early evening, the bulk of the activity 
was in northeast Iowa, with a few isolated storms in southern Iowa. 
Temperatures this afternoon ranged from the mid 70s to lower 80s. 
Winds shifted to a northwesterly direction. A few thunderstorms did 
manage to produce a couple inches of rain in localized areas. 

Across the rest of the region, eastern and western Missouri has been
the active spot with widespread thunderstorms. 

For this evening, a few isolated rain showers are possible. Main story
overnight will be the potential for patchy fog development that could
last into the early morning hours. Overnight low temperatures will be
in the mid 60s. Tomorrow, highs will be in the mid 80s. Conditions
should remain dry. Heading into the weekend, high temperatures will
remain in the mid 80s. Rain and thunderstorm chances return Sunday.
There is a possibility of severe weather, however specific details 
are not yet known. 

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 1000 PM CDT THU AUG 16 2018

BURLINGTON     CLOUDY    78  72  81 N9        29.94R HX  80           
FAIRFIELD *    CLOUDY    73  70  88 N6        29.96R                  
FORT MADISON * CLOUDY    75  73  94 CALM      29.96R                  
KEOKUK *       CLOUDY    77  72  83 VRB6G14   29.95R                  
OSKALOOSA *    FAIR      70  68  94 N3        29.99R                  
CENTERVILLE *    N/A     72  72 100 W3        29.99S                  
OTTUMWA        PTCLDY    73  70  90 N7        29.98R                  
WASHINGTON *   CLOUDY    72  70  94 N3        29.97R                  

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

Current Agricultural Weather Conditions in Iowa
Based on observations at 1000pm CDT, Thursday August 16, 2018

Across Iowa...temperatures are near 71 degrees west, near 69 degrees central, and near 68 degrees east. Current sky conditions are clear west, partly cloudy central, and fair east. In the west, relative humidity is near 84%, and the dew point is near 66 degrees. In the central part of the state, relative humidity is near 90%, and the dew point is near 66 degrees. In the east, relative humidity is near 93%, and the dew point is near 66 degrees. The livestock heat stress category is no stress west, no stress central, and no stress east. Winds are from the north at 7 mph west, where conditions are favorable for spraying. Winds are from the northeast 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 78 degrees at Burlington. The lowest temperature is 66 degrees at Storm Lake, Spencer, Marshalltown, Harlan, and Cedar Rapids.

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

1143 AM CDT Thu Aug 16 2018


Scattered thunderstorms are expected to develop across the area
this afternoon and evening. The primary threats will be lightning
and locally heavy rainfall. But a few strong to severe storms 
capable of damaging winds will also be possible.

The Storm Prediction Center has a marginal risk of severe storms
for areas generally along and south of the Highway 20 corridor. 


On Monday, a seasonally strong storm system will bring 
thunderstorms to the outlook area. It is too early to assess any 
severe or heavy rain risk at this time. Interested individuals 
should monitor this product for further updates.


Spotter activation may be needed this afternoon and evening.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For JEFFERSON County, IA
926 PM CDT Thu Aug 16 2018

Mostly cloudy with scattered showers and thunderstorms. Patchy fog after midnight. Low in the upper 60s. Northwest wind 5 to 10 mph. Chance of rain 30 percent.

Partly sunny. Patchy fog in the morning. High in the mid 80s. North wind 10 to 15 mph.

Partly cloudy. Low in the mid 60s. North wind 5 to 10 mph.

Mostly sunny. High in the upper 80s. Northeast wind 5 to 10 mph.

Mostly clear. Low in the mid 60s. East wind 5 to 10 mph.

Mostly sunny. High in the mid 80s.

Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Low in the mid 60s. Chance of rain 70 percent.

Mostly cloudy with a 50 percent chance of showers and thunderstorms. High in the upper 70s.

Mostly cloudy. Low in the lower 60s.

Mostly sunny. High in the upper 70s.

Mostly clear. Low in the mid 50s. High around 80.

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 
                   AUG 22-26    AUG 24-30    AUG       AUG-OCT                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Above      Above      Above                      
 Precipitation:     Normal        Above     Normal     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

Thursday August 16, 2018 the 228th Day of Year

Declination 13.420000
Distance 0.999717 AU
Rise 07:23 EDT Set 21:12 EDT
Transit Meridian 14:18 EDT
Civil Twilight Begins 06:55 EDT Ends 21:41 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

The Battle of Bennington, delayed a day by rain, was fought. The rain
delayed British reinforcements, and allowed the Vermont Militia to arrive
in time, enabling the Americans to win a victory by defeating two enemy
forces, one at a time. (David Ludlum)
A dry spell began in San Bernardino County of southern California that
lasted until the 6th of May in 1912, a stretch of 994 days! Another dry
spell, lasting 767 days, then began in October of 1912. (The Weather
Altapass NC was deluged with 22.22 inches of rain in 24 hours to establish
a state record. (The Weather Channel)
Afternoon and evening thunderstorms developing along a cold front produced
severe weather from Oklahoma to Wisconsin and Lower Michigan. Thunderstorms
in central Illinois produced wind gusts to 80 mph at Springfield which
toppled two large beer tents at the state fair injuring 58 persons.
Thunderstorms also drenched Chicago IL with 2.90 inches of rain, making
August 1987 their wettest month of record. (The National Weather Summary)
(Storm Data)
Thunderstorms developing along a slow moving cold front produced severe
weather from North Dakota to Lower Michigan during the day. Nine tornadoes
were sighted in North Dakota, and thunderstorms also produced hail three
inches in diameter at Lakota ND, and wind gusts to 83 mph at Marais MI.
Thirty-seven cities in the northeastern U.S. reported record high
temperatures for the date, including Rockford IL with a reading of 104
degrees. (The National Weather Summary) (Storm Data)
Late afternoon and evening thunderstorms in the Central High Plains Region
produced golf ball size hail at La Junta CO, Intercanyon CO, and Custer SD.
Afternoon thunderstorms over South Texas drenched Brownsville with 2.60
inches of rain. Fair skies allowed viewing of the late evening full lunar
eclipse from the Great Lakes Region to the Northern and Central Plains
Region, and across much of the western third of the country. (The National
Weather Summary) (Storm Data)

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