Grundy County Weather and Climate Synopsis



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36 Hr. Forecast Map
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Satellite images from NOAA

Weather Summary

Hourly Observations

Nowcast

Precision Ag., Lawn & Garden Guidance

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.


Weather Summary for Iowa
National Weather Service Des Moines IA
523 AM CDT Tue Apr 16 2024

Today: 

Showers and storms have been ongoing through much of the overnight 
hours. Frequent lightning and gusty winds have been associated with
storms so far early this morning, but some hail remains possible.
Temperatures as of 5 AM are mild and in the 50s to 60s across much of
the state. Winds out of the southeast to east remain breezy to gusty
with gusts up to around 35-40 mph. 

Today will be a stormy day with multiple rounds of storms possible.
Some of these storms will likely be severe with large hail, damaging
wind gusts, and some tornadoes all possible. A few of the storms could
produce significant severe weather. In addition to the storms, gusty
winds will continue through the day today with gusts up to 50 mph
possible outside of thunderstorms. A Wind Advisory is in effect for
much of central into northwest and northeast Iowa today for these 
strong wind gusts, though wind gusts in some thunderstorms may be 
higher. High temperatures today will be in the 60s to 70s. Make sure 
you have multiple ways to receive warnings today and stay weather 
aware!

Tonight and beyond: 

The severe weather potential will end tonight, but some showers may 
linger into early Wednesday, especially northeast. Additional showers
are likely Thursday from central Iowa into the Missouri Valley. 
Cooler temperatures can be expected to end the work week as well, with
highs in the 50s and lows in the 30s.

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

Precision Agriculture Weather Forecast For GRUNDY County

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Regional Hourly Observations For GRUNDY County
Issued at 300 PM CDT TUE APR 16 2024

NORTHEAST IOWA CITY SKY/WX TMP DP RH WIND PRES REMARKS CEDAR RAPIDS HVY RAIN 66 64 93 S23G49 29.49 VSB 1/4 TC 19 CHARLES CITY * HVY RAIN 55 55 100 VRB6G20 29.51R VSB 1/2 TC 13 DECORAH * CLOUDY 64 48 55 E21G36 29.45F TC 18 DUBUQUE LGT RAIN 72 58 61 SE20G37 29.58F TC 22 MONTICELLO * LGT RAIN 70 63 78 SE28G40 29.46 HAZE TC 21 OELWEIN * PTSUNNY 63 61 94 E28G37 29.43F FOG TC 17 WATERLOO CLOUDY 66 62 87 S12G23 29.46R TC 19

Current Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel
Current Agricultural Weather Conditions in Iowa
Based on observations at 300pm CDT, Tuesday April 16, 2024

Across Iowa...temperatures are near 59 degrees west, near 75 degrees central, and near 74 degrees east. Current sky conditions are light rain west, mostly sunny central, and light rain east. In the west, relative humidity is near 77%, and the dew point is near 52 degrees. In the central part of the state, relative humidity is near 43%, and the dew point is near 51 degrees. In the east, relative humidity is near 63%, and the dew point is near 61 degrees. Winds are from the north at 20 mph with gusts at 29 mph west, where conditions are not favorable for spraying due to strong winds and light rain. Winds are from the south at 23 mph with gusts at 35 mph central, where conditions are not favorable for spraying due to strong winds. Winds are from the southeast at 35 mph with gusts at 45 mph east, where conditions are not favorable for spraying due to strong winds and light rain. Based on current available observations, the highest temperature is 77 degrees at Harlan. The lowest temperature is 54 degrees at Mason City.

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 GRUNDY County,IA

325 PM CDT Tue Apr 16 2024 DAY ONE This afternoon and tonight A Tornado Watch is in effect for the area. Please refer to the National Weather Service website at weather.gov/desmoines for further details. A Wind Advisory is in effect for the area. Please refer to the National Weather Service website at weather.gov/desmoines for further details. DAYS TWO THROUGH SEVEN Wednesday through Monday No hazardous weather is expected at this time. SPOTTER INFORMATION STATEMENT Spotters may be needed at times this afternoon into tonight.
NWS Severe Weather Map , Convective Outlook

7-Day Forecast For GRUNDY County, IA
246 PM CDT Tue Apr 16 2024
WIND ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT THIS EVENING

TORNADO WATCH 116 IN EFFECT UNTIL 6 PM CDT THIS EVENING

TONIGHT
Mostly cloudy. Showers with thunderstorms likely early, then a chance of showers and thunderstorms this evening. A slight chance of showers and thunderstorms after midnight. Some thunderstorms may be severe with damaging winds, large hail, and tornadoes, then some thunderstorms may be severe this evening. Locally heavy rainfall possible early. Windy with lows in the lower 50s. South winds 20 to 30 mph with gusts up to 45 mph, becoming southwest 15 to 20 mph with gusts up to 30 mph after midnight. Chance of rain 90 percent.
WEDNESDAY
Mostly cloudy and windy. Highs in the lower 60s. West winds 20 to 30 mph with gusts up to 40 mph.
WEDNESDAY NIGHT
Mostly clear in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 40s. Northwest winds 15 to 20 mph with gusts up to 30 mph, diminishing to 5 to 10 mph after midnight. Chance of rain 50 percent.
THURSDAY
Showers likely, mainly in the morning. Highs in the mid 50s. Northwest winds 10 to 15 mph. Chance of rain 70 percent.
THURSDAY NIGHT
Mostly clear. Lows in the mid 30s. Northwest winds around 10 mph.
FRIDAY
Sunny, windy with highs in the lower 50s.
FRIDAY NIGHT
Mostly cloudy in the evening, then clearing. Breezy with lows around 30.
SATURDAY
Mostly sunny. Highs in the lower 50s.
SATURDAY NIGHT
Mostly cloudy in the evening, then clearing. Lows in the upper 20s.
SUNDAY
Sunny. Highs in the upper 50s.
SUNDAY NIGHT
Mostly clear. Lows in the mid 30s.
MONDAY
Mostly sunny. A chance of rain showers in the afternoon. Highs in the lower 60s. Chance of rain 30 percent.
MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers in the evening. Lows in the lower 40s. Chance of rain 40 percent.
TUESDAY
Mostly sunny. Highs in the mid 60s.
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 APR 22-26 APR 24-30 JUN JUN-AUG ----------- ----------- -------- --------- Temperature: Above Normal 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
Tuesday April 16, 2024 the 107th Day of Year --------------------------------------------------- SUN Declination 10.670000 Distance 0.999719 AU Rise 07:30 EDT Set 20:58 EDT Transit Meridian 14:13 EDT Civil Twilight Begins 07:02 EDT Ends 21:26 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 16TH HISTORIC WEATHER EVENTS ...1851... The famous "Lighthouse Storm" raged near Boston Harbor. Whole gales and gigantic waves destroyed Minot Light with its two keepers still inside. The storm resulted in great shipping losses and coastal erosion. (David Ludlum) ...1880... A tornado near Marshall MO carried the heavy timbers of an entire home a distance of twelve miles. (The Weather Channel) ...1933... Franklin Lake NH was buried under 35 inches of snow. (Sandra and TI Richard Sanders - 1987) ...1960... A wind gust of 70 mph was measured at the Stapleton International Airport in Denver CO, their highest wind gust of record. (The Weather Channel)

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