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Jasper County, IA Weather and Climate Synopsis

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Weather Summary for Iowa
National Weather Service Des Moines IA
346 AM CST Tue Dec 31 2024

Today: 

Low pressure moving from Missouri into Central Illinois overnight
produced a broad area of light rain and snow across central and
southern Iowa early this morning. There were spotty areas of snow
accumulations with a few areas receiving around an inch or so.
Most primary roads and highways remained wet although less traveled
roads did become slushy in areas. Otherwise, northwest winds increased
and were common from 10 to 20 mph with gusts to almost 30 mph at 
times. 

The light precipitation is expected to come to an end this morning as
the system pulls away from the state. Some minor snow accumulations,
generally less than an inch remain possible in far south central to
southeast Iowa through mid morning, otherwise the north winds persist
for much of the day as cooler air arrives. Additional flurries are
expected late this afternoon into the evening as another weak system
passes through the state. 

Tonight and beyond: 

Any flurries are forecast to end tonight with clearing expected toward
daybreak on New Years Day. Mostly sunny skies will greet the New Year
with near normal temperatures in the mid 20s to lower 30s. However,
a clipper system approaches the state on Thursday with light snow
overspreading much of central into southern Iowa. Minor accumulations
are forecast by Thursday evening along with the arrival of cooler air.
Highs by Friday are forecast to remain in the teens to lower 20s over
much of the state as cold polar air overspread the Midwest.
National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

Precision Agriculture Weather Forecast For JASPER County


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Regional Hourly Observations For JASPER County
Issued at 200 PM CDT SUN JUL 20 2025

   CENTRAL IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
AMES           MOSUNNY   83  74  74 E8        29.93F HX  89  TC  28   
ANKENY *       PTSUNNY   84  75  74 SE7       29.93S HX  92  TC  29   
BOONE *        PTSUNNY   82  81  94 E6        29.92F HX  95  TC  28   
CHARITON *     MOSUNNY   82  77  83 VRB7      29.91F HX  91  TC  28   
DES MOINES     PTSUNNY   84  73  69 SE7       29.92F HX  90  TC  29   
GRINNELL*      CLOUDY    80  74  82 E9        29.97S HX  85  TC  27   
KNOXVILLE *    PTSUNNY   84  75  74 S7        29.92F HX  92  TC  29   
MARSHALLTOWN   CLOUDY    82  73  74 E8        29.95S HX  87  TC  28   
NEWTON *       PTSUNNY   82  75  78 CALM      29.94S HX  89  TC  28   
PELLA *        CLOUDY    84  76  76 SE6       29.94S HX  92  TC  29   
PERRY *        CLOUDY    84  76  79 SE7       29.90F HX  93  TC  29

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

Current Agricultural Weather Conditions in Iowa
Based on observations at 200pm CDT, Sunday July 20, 2025

Across Iowa...temperatures are near 80 degrees west, near 84 degrees central, and near 80 degrees east. Current sky conditions are cloudy west, partly sunny central, and partly sunny east. In the west, relative humidity is near 79%, and the dew point is near 73 degrees. The heat index is near 84 degrees west. In the central part of the state, relative humidity is near 69%, and the dew point is near 73 degrees. The heat index is near 90 degrees central. In the east, relative humidity is near 79%, and the dew point is near 73 degrees. The heat index is near 84 degrees east. The livestock heat stress category is no stress west, danger central, and no stress east. Winds are from the southeast at 6 mph west, where conditions are favorable for spraying. Winds are from the southeast at 7 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 86 degrees at Clarinda. The lowest temperature is 71 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 JASPER County,IA 

209 PM CDT Sun Jul 20 2025

 DAY ONE  This afternoon and tonight

Isolated storms are possible (~25% chance) this afternoon into 
evening, mainly south, and late tonight into the overnight (~20%
chance) mainly in the west to northwest. The chances for severe 
storms remains low at this time.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

Isolated thunderstorms may continue into early Monday with some 
redevelopment possible (~15% chance) later in the day as well, 
especially south. Severe storms are not expected. 

Additional storms are possible mid to late next week.

Heat builds into the area into mid-week with heat indices topping
100 degrees at times. 

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not anticipated.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For JASPER County, IA
219 PM CDT Sun Jul 20 2025

TONIGHT
Mostly cloudy. Humid with lows in the upper 60s. East winds 5 to 10 mph.

MONDAY
Mostly cloudy in the morning, then becoming partly sunny. Humid with highs in the mid 80s. Southeast winds around 10 mph.

MONDAY NIGHT
Partly cloudy. Humid with lows in the lower 70s. Southeast winds 5 to 10 mph.

TUESDAY
Mostly sunny. Humid with highs in the lower 90s. Southeast winds 5 to 10 mph. Heat index values up to 108 in the afternoon.

TUESDAY NIGHT
Mostly clear. Humid with lows in the mid 70s. South winds around 10 mph. Heat index values up to 104 early in the evening.

WEDNESDAY
Sunny. Highs in the lower 90s. Heat index values up to 105.

WEDNESDAY NIGHT
Mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening.

THURSDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 20 percent.

THURSDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent.

FRIDAY
Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent.

FRIDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 30 percent.

SATURDAY
Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent.

SATURDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 20 percent.

SUNDAY
Sunny. Highs around 90. Heat index values up to 100 in the afternoon.

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 
                                 IOWA                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   JUL 25-29 JUL 27-AUG 2    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:     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
Historical Weather And Climate Facts For Today

////////////////////////
JULY 20TH...HISTORIC WEATHER EVENTS
...1930...
The temperature at Washington D.C. soared to an all-time record of 106
degrees. The next day Millsboro reached 110 degrees to set a record for the
state of Delaware. July 1930 was one of the hottest and driest summers in
the U.S., particularly in the Missouri Valley where severe drought
conditions developed. Toward the end of the month state records were set
for Kentucky with 114 degrees, and Mississippi with 115 degrees. (David
Ludlum)
...1934...
The temperature at Keokuk IA soared to 118 degrees to establish a state
record. (The Weather Channel)
...1953...
Twenty-two inches of hail reportedly fell northeast of Dickinson ND. (The
Weather Channel)
...1986...
The temperature at Charleston SC hit 104 degrees for the second day in a
row to tie their all-time record high. (The Weather Channel)
...1987...
Thunderstorms produced severe weather across Minnesota, Wisconsin and
Michigan. Thunderstorms produced wind gusts to 87 mph at Mosinee WI, and
strong thunderstorm winds capsized twenty-six boats on Grand Traverse Bay
drowning two women. Thunderstorms produced nine inches of rain at Shakopee
MN, with 7.83 inches reported in six hours at Chaska MN. Thunderstorms in
north central Nebraska produced hail as large as golf balls in southwestern
Cherry County, which accumulated to a depth of 12 inches. (The National
Weather Summary) (Storm Data)
...1988...
The temperature at Redding CA soared to an all-time record high of 118
degrees. Showers and thunderstorms produced much needed rains from New
England to southern Texas. Salem IN was deluged with 7.2 inches of rain
resulting in flash flooding. (The National Weather Summary)
...1989...
Showers and thunderstorms in the Middle Atlantic Coast Region soaked
Wilmington DE with 2.28 inches of rain, pushing their total for the period
May through July past the previous record of 22.43 inches. Heavy rain over
that three month period virtually wiped out a 16.82 inch deficit which had
been building since drought conditions began in 1985. Thunderstorms in
central Indiana deluged Lebanon with 6.50 inches of rain in twelve hours,
and thunderstorms over Florida produced wind gusts to 84 mph at Flagler
Beach. (The National Weather Summary) (Storm Data)

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