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Dallas County, IA Weather and Climate Synopsis

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Weather Summary Hourly Observations Nowcast Precision Ag., Lawn & Garden Guidance
7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts

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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
520 PM CST Sun Dec 17 2017

Today was rather interesting across Iowa. Most of the state has seen
wide spread stratus cloud cover since the morning hours. Throughout
the afternoon, central Iowa did have some substantial breaks in cloud
cover. There have been reports of light rain showers throughout the
state, with traces of snow sprinkled in. Temperatures this afternoon
hit the mid to upper 30s. Winds have not been strong, coming from the
northwest at less than 5 miles per hour. 

The rest of the Midwest has experienced similar conditions in terms of
cloud cover and isolated rain showers. Temperatures in Missouri and
Kansas were a little warmer, with high temperatures in the mid 40s. 

For this evening, some portions of Iowa will see cloud cover
dissipate, others will see the cloud cover linger. No substantial
precipitation if any is expected this evening. Temperatures will drop
into the mid 20s, and perhaps a few degrees cooler in areas where the
cloud cover dissipates. For heading into the start of the work week, 
temperatures will rebound back into the mid 40s. 

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

Precision Agriculture Weather Forecast For DALLAS County

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Regional Hourly Observations For DALLAS County
Issued at 1200 AM CST MON DEC 18 2017

AMES           CLOUDY    27  26  96 SW6       29.97F FOG     WCI  20  
6HR MIN TEMP:  24; 6HR MAX TEMP:  31;                                

ANKENY *       PTCLDY    28  27  93 SW5       29.99F FOG     WCI  23  
BOONE *        CLOUDY    28  27  93 W3        29.95S FOG              
CHARITON *     CLOUDY    36  34  93 W9        29.98S WCI  29          
DES MOINES     MOCLDY    29  25  85 W5        29.98F WCI  24          
6HR MIN TEMP:  29; 6HR MAX TEMP:  36;                                

GRINNELL*      CLOUDY    33  32  94 SW6       29.98F WCI  28          
KNOXVILLE *    CLOUDY    36  34  93 W6        29.97F FOG     WCI  31  
MARSHALLTOWN   CLOUDY    28  26  92 S3        29.95F FOG              
6HR MIN TEMP:  27; 6HR MAX TEMP:  35;                                

NEWTON *       CLOUDY    32  28  86 W7        29.98S WCI  26          
PELLA *        CLOUDY    35  32  90 W5        29.99F WCI  31          
PERRY *          N/A     25  22  90 S6        29.97S FOG     WCI  18  

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

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

Across Iowa...temperatures are near 21 degrees west, near 29 degrees central, and near 38 degrees east. Current sky conditions are clear west, mostly cloudy central, and fog east. In the west, relative humidity is near 96%, and the dew point is near 20 degrees. In the central part of the state, relative humidity is near 85%, and the dew point is near 25 degrees. In the east, relative humidity is near 97%, and the dew point is near 37 degrees. Visibility is less than one mile east. Winds are from the east at 3 mph west, where conditions are favorable for spraying. Winds are from the west at 5 mph central, where conditions are favorable for spraying. The wind chill is near 24 degrees central. Winds are from the southwest at 5 mph east, where conditions are not favorable for spraying due to fog. The wind chill is near 34 degrees east. 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 44 degrees at Burlington. The lowest temperature is 20 degrees at Spencer.

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 DALLAS County,IA

336 PM CST Sun Dec 17 2017

 DAY ONE  This afternoon and tonight

No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

Wintery precipitation will be possible Thursday and Friday and
again late Saturday night and Sunday. Measurable snowfall will be
possible, leading to the potential for hazardous travel. Gusty 
winds will also be possible Thursday. 


Spotter activation is not anticipated at this time.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For DALLAS County, IA
1122 PM CST Sun Dec 17 2017

Mostly cloudy. Patchy fog. Low in the mid 20s. West wind around 5 mph.

Sunny, warmer. Patchy fog through mid morning. High in the lower 50s. Southwest wind 5 to 15 mph with gusts to around 25 mph.

Mostly clear. Low in the lower 30s. Southwest wind 5 to 15 mph with gusts to around 25 mph.

Sunny. High in the upper 40s. Northwest wind 5 to 10 mph.

Mostly clear. Low in the mid 20s. East wind near 5 mph.

Mostly sunny. High in the mid 40s.

Mostly cloudy. Low in the mid 30s.

Cloudy. A slight chance of rain possibly mixed with snow in the morning, then rain likely in the afternoon. High in the mid 40s. Chance of precipitation 70 percent.

Cloudy. Snow possibly mixed with rain through midnight, then a chance of snow after midnight. Colder. Low in the mid 20s. Chance of precipitation 70 percent.

Mostly cloudy with a 30 percent chance of snow. Colder. High around 30.

Mostly cloudy. Colder. Low around 15.

Mostly cloudy. High in the mid 20s.

Mostly cloudy. A 40 percent chance of snow after midnight. Low around 10.

Mostly cloudy with a 40 percent chance of snow. High in the lower 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
                 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

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

A tornado swept across Jackson County, Williamson County and Franklin
County in southern Illinois killing eleven persons. (David Ludlum)
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
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)
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)
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)
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)
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)
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