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Madison County, IA Weather and Climate Synopsis

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Weather Summary for Iowa
National Weather Service Des Moines IA
1059 AM CST Mon Dec 18 2017

Areas of dense developed once again overnight, this time over portions
of central and southern Iowa including the Des Moines metro. The fog
reduced visibility down to a quarter mile or less at times and created
a few slick spots on roads as temperatures were near or below
freezing. The fog has mostly dissipated as of late morning, giving way
to mostly sunny skies across the state of Iowa. Temperatures through
the next 3 days will be quite mild for mid December with afternoon
highs in the 40s and 50s. 

Significant changes are on the way for the end of the week as colder
air plunges south into the region. Chances for rain or snow arrive on
Thursday and continue into Thursday night and Friday. Some parts of
Iowa may see their first accumulating snowfall of the season. The best
chance for accumulating snowfall looks to be across northern Iowa, but
cannot be ruled out for locations further south at this time. A
significant drop in temperatures is expected as the system departs 
the area, which will likely keep temperatures below normal through the
weekend and the Christmas holiday. Additional chances for light snow 
are possible through the weekend. Those with holiday travel plans 
should monitor the forecast through the week for winter weather 
updates.

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

Precision Agriculture Weather Forecast For MADISON County


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Regional Hourly Observations For MADISON County
Issued at 1200 PM CST MON DEC 18 2017

   CENTRAL IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
AMES           SUNNY     43  33  68 SW17      29.88F                  
6HR MIN TEMP:  21; 6HR MAX TEMP:  43;                                

ANKENY *       SUNNY     45  34  65 SW12G18   29.90F                  
BOONE *        SUNNY     43  32  65 SW17G24   29.85F                  
CHARITON *     SUNNY     43  36  75 SW16G25   29.92F                  
DES MOINES     MOSUNNY   44  34  67 SW21      29.90F                  
6HR MIN TEMP:  29; 6HR MAX TEMP:  44;                                

GRINNELL*      SUNNY     39  35  84 S16G22    29.91F WCI  31          
KNOXVILLE *    SUNNY     43  34  70 SW16      29.90F                  
MARSHALLTOWN   MOSUNNY   39  33  79 SW17      29.87F WCI  30          
6HR MIN TEMP:  22; 6HR MAX TEMP:  39;                                

NEWTON *       SUNNY     43  36  75 SW21      29.89F                  
PELLA *        SUNNY     43  35  73 SW12G18   29.93F                  
PERRY *          N/A     44  31  61 SW13G22   29.89F                  

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


Current Agricultural Weather Conditions in Iowa
Based on observations at 1200pm CST, Monday December 18, 2017

Across Iowa...temperatures are near 46 degrees west, near 44 degrees central, and near 42 degrees east. Current sky conditions are sunny west, mostly sunny central, and cloudy east. In the west, relative humidity is near 55%, and the dew point is near 31 degrees. In the central part of the state, relative humidity is near 67%, and the dew point is near 34 degrees. In the east, relative humidity is near 73%, and the dew point is near 34 degrees. Winds are from the southwest at 9 mph west, where conditions are favorable for spraying. Winds are from the southwest at 21 mph central, where conditions are not favorable for spraying due to strong winds. Winds are from the west at 13 mph east, where conditions are not favorable for spraying due to strong winds. 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 49 degrees at Burlington. The lowest temperature is 34 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 MADISON County,IA

1001 AM CST Mon Dec 18 2017

 DAY ONE  Today and tonight

No hazardous weather is expected at this time. 

 DAYS TWO THROUGH SEVEN  Tuesday through Sunday

Wintery precipitation will be possible Thursday evening changing
over to all snow by Friday morning. Light accumulations are
possible by late Friday. Additional light snowfall is possible 
Saturday night through Sunday night. 

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not expected, but any precipitation reports
late this week will be greatly appreciated.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For MADISON County, IA
1224 PM CST Mon Dec 18 2017

REST OF TODAY
Sunny, warmer. High in the lower 50s. Southwest wind 10 to 15 mph with gusts to around 25 mph.

TONIGHT
Mostly clear. Low in the mid 30s. Southwest wind 10 to 15 mph with gusts to around 25 mph.

TUESDAY
Sunny. High around 50. North wind 5 to 10 mph.

TUESDAY NIGHT
Mostly clear. Low in the upper 20s. East wind near 5 mph.

WEDNESDAY
Mostly sunny. High in the mid 40s. Southeast wind 5 to 15 mph.

WEDNESDAY NIGHT
Mostly cloudy. Low in the mid 30s.

THURSDAY
Cloudy with a 50 percent chance of light rain. High in the upper 40s.

THURSDAY NIGHT
Cloudy. Light rain possibly mixed with snow through midnight, then a slight chance of light rain and snow after midnight. Low in the upper 20s. Chance of precipitation 70 percent.

FRIDAY
Mostly cloudy. A 20 percent chance of light snow in the morning. Colder. High in the lower 30s.

FRIDAY NIGHT
Mostly cloudy. A 20 percent chance of light snow through midnight. Colder. Low 15 to 20.

SATURDAY
Mostly cloudy. High in the mid 20s.

SATURDAY NIGHT
Mostly cloudy with a 40 percent chance of light snow. Low 10 to 15.

SUNDAY
Mostly cloudy with a 50 percent chance of light snow. High in the mid 20s.

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 
                   DEC 23-27 DEC 25-DEC 31    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below     Normal      Below                      
 Precipitation:      Below        Below     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

Monday December 18, 2017 the 352th Day of Year

---------------------------------------------------
SUN
Declination -23.410000
Distance 0.999725 AU
Rise 08:38 EST Set 17:45 EST
Transit Meridian 13:11 EST
Civil Twilight Begins 08:07 EST Ends 18:15 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

DECEMBER 18TH
HISTORIC WEATHER EVENTS
...1957...
A tornado swept across Jackson County, Williamson County and Franklin
County in southern Illinois killing eleven persons. (David Ludlum)
...1981...
A heavy lake-effect snow blanketed the southern and southeast shores of
Lake Michigan leaving up to 22 inches of snow at Valparaiso IND. (David
Ludlum)
...1983...
Record cold hit the north central states. At Havre MT the mercury plunged
to a record reading of 34 degrees below zero. (Sandra and TI Richard
Sanders - 1987)
...1984...
A storm over southern California left up to 16 inches of snow in the
mountains and upper deserts, with 13 inches reported at Lancaster. Edwards
Air Force Base was closed, and Interstate 5 was closed from Castaic to the
Tehachapis Mountains. (18th-19th) (The Weather Channel)
...1986...
A strong winter storm, which developed off the coast of New Jersey and
moved out to sea, lashed the northeastern U.S. with high winds, heavy rain,
and heavy snow. The storm left snowfall amounts of up to 30 inches in
Vermont, 24 inches in Massachusetts, and 20 inches in New Hampshire. The
highest rainfall amounts approached four inches in southern New England,
where winds gusted to 70 mph. (Storm Data)
...1987...
A weakening storm moved into the Rocky Mountain Region producing six inches
of snow at the Platoro Reservoir in the San Juan Mountains of Colorado. The
storm then spread rain and drizzle across the Southern High Plains into the
Middle Mississippi Valley, with thunderstorms over Texas. (Storm Data) (The
National Weather Summary)
...1988...
Warm weather prevailed in the central U.S. while cool weather prevailed
across the eastern states. Sheridan WY, with a record warm afternoon high
of 68 degrees, was seven degrees warmer than Key West FL. (The National
Weather Summary)
...1989...
A winter storm moving out of the Great Plains Region spread freezing rain,
sleet and snow across parts of the southeastern U.S. Freezing rain resulted
in 170 auto accidents in the Memphis area during the evening hours.
Unseasonably warm weather continued ahead of arctic cold front. Miami FL
equalled their record for December with an afternoon high of 87 degrees.
(Storm Data) (The National Weather Summary)

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