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Benton 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
1228 PM CDT Sat Jul 20 2019

Active weather was present across north-central Iowa this morning and
early afternoon. A cluster of thunderstorms held together moving from
eastern South Dakota into Iowa. Severe wind gusts and wind damage 
occurred in areas north of U.S. Hwy. 20. Across central and southern 
Iowa, skies were mostly clear. Temperatures where thunderstorms 
occurred dropped into the 50s for a brief periods in northern Iowa. 
Other locations in Iowa have already reached the 90s. As outflow 
boundaries from storms move through, there may be brief periods of 
cooler temperatures in some areas, but the atmosphere will likely 
recover as the day goes on. 

Fortunately, this will be the final day of the sultry weather that 
has created a period of dangerous heat conditions since the middle
part of this past week. As a cold front slowly moves southward 
through the state today and tonight, it will encounter the very hot 
and moisture rich airmass. This will lead to thunderstorms over
northern Iowa that sink southward tonight. A few storms may become 
severe later this afternoon into this evening, but a bigger concern
is the amount of water in the air that could lead to locally heavy 
rain and flash flooding overnight. Thunderstorms will remain scattered
on Sunday, mainly over the southern part of the state, before drier 
air finally clears the rain out of the state Sunday night. 
Temperatures will be much lower Sunday with highs in the upper 70s to 
low 80s. These seasonably cool temperatures will continue into next 
week as a sprawling area of high pressure moves over the region.

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

Precision Agriculture Weather Forecast For BENTON County

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Regional Hourly Observations For BENTON County
Issued at 700 PM CDT SAT JUL 20 2019

CEDAR RAPIDS     N/A     79  71  76 E7        29.83F HX  82           
6HR MIN TEMP:  79; 6HR MAX TEMP:  92;                                

CHARLES CITY * FAIR      66  64  94 N14G20    29.89F                  
CLINTON *      FAIR      82  72  71 SE9       29.85F HX  87           
DECORAH *      FAIR      72  64  78 N10G18    29.88F                  
DUBUQUE        FAIR      78  69  73 S10       29.84F HX  80           
6HR MIN TEMP:  76; 6HR MAX TEMP:  90; 6HR PCP: TRACE;                

MONTICELLO *   FAIR      81  72  74 SE5       29.83F HX  84           
OELWEIN *      SUNNY     75  72  88 N13       29.88R                  
WATERLOO       FAIR      76  69  79 NE10      29.81F                  
6HR MIN TEMP:  76; 6HR MAX TEMP:  82; 6HR PCP:  0.01;                

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

Current Agricultural Weather Conditions in Iowa
Based on observations at 700pm CDT, Saturday July 20, 2019

Across Iowa...temperatures are near 76 degrees west, near 71 degrees central, and near 83 degrees east. Current sky conditions are mostly sunny west, cloudy central, and fair east. In the west, relative humidity is near 76%, and the dew point is near 68 degrees. In the central part of the state, relative humidity is near 87%, and the dew point is near 67 degrees. In the east, relative humidity is near 60%, and the dew point is near 68 degrees. The heat index is near 86 degrees east. The livestock heat stress category is no stress west, no stress central, and no stress east. Winds are from the north at 14 mph west, where conditions are not favorable for spraying due to strong winds. Winds are variable at 5 mph central, where conditions are favorable for spraying. Winds are from the east at 8 mph east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 91 degrees at Clarinda and Burlington. The lowest temperature is 64 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 BENTON County,IA

1217 PM CDT Sat Jul 20 2019


An Excessive Heat Warning remains in effect for the entire outlook
area until 7 PM this evening. Very high heat indices between 100 
and 110 degrees are expected.

A cold front will move slowly across the area tonight with
numerous thunderstorms expected to develop along and behind the 
front. There is an enhanced risk for severe storms and damaging 
winds of at least 70 mph north of a Freeport to Dubuque to 
Edgewood line. There is also a risk for isolated tornadoes.

There is a slight risk of severe thunderstorms across much of the
remainder of the area. The main threats will be large hail and 
damaging winds. Additionally, thunderstorms will produce heavy 
rainfall and may also hit the same area repeatedly overnight which
may cause flash flooding. 


Thunderstorms are likely on Sunday as a cold front continues to 
move slowly south through the area. Severe thunderstorms are 
possible, mainly for areas south of Interstate 80, with damaging 
winds, heavy rain and flash flooding being the primary threats. 
There is a marginal risk for severe storms.


Spotter and amateur radio network activation may be needed
especially this evening and overnight.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For BENTON County, IA
742 PM CDT Sat Jul 20 2019

A chance of showers and thunderstorms early in the evening, then showers and thunderstorms in the late evening and overnight. Low in the upper 60s. Northeast wind 5 to 10 mph. Chance of rain 90 percent.

Not as warm. Mostly cloudy. Showers and thunderstorms likely in the morning, then a slight chance of showers and thunderstorms in the afternoon. High in the upper 70s. Northeast wind 5 to 10 mph. Chance of rain 70 percent.

Mostly cloudy. A chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Low in the lower 60s. North wind 5 to 10 mph. Chance of rain 50 percent.

Mostly sunny. High in the upper 70s. North wind 5 to 10 mph.

Mostly clear. Low in the mid 50s. North wind 5 to 10 mph.

Sunny. High around 80.

Mostly clear. Low in the upper 50s. High in the lower 80s.

Partly sunny. High in the mid 80s.

Mostly clear. Low in the mid 60s.

Mostly sunny. High in the mid 80s.

Mostly cloudy. Low in the mid 60s.

Mostly sunny. High in the mid 80s.

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 
                   JUL 26-30 JUL 28-AUG 3    JUL       JUL-SEP                      
                 -----------  -----------  --------  ---------
   Temperature:     Normal        Above      Below      Below                      
 Precipitation:      Above        Above      Above      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

Saturday July 20, 2019 the 201th Day of Year

Declination 20.510000
Distance 0.999716 AU
Rise 06:56 EDT Set 21:44 EDT
Transit Meridian 14:20 EDT
Civil Twilight Begins 06:25 EDT Ends 22:15 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 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
The temperature at Keokuk IA soared to 118 degrees to establish a state
record. (The Weather Channel)
Twenty-two inches of hail reportedly fell northeast of Dickinson ND. (The
Weather Channel)
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)
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)
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)
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