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Lyon County, IA Weather and Climate Synopsis

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Weather Summary for Iowa
National Weather Service Des Moines IA
446 AM CST Fri Dec 15 2017

Skies were cloudy across the state throughout the overnight hours. An
area of freezing drizzle moved through portions of central Iowa during
the early morning hours and created a few slick spots on roadways.
This area of precipitation has dissipated. Early morning temperatures
range from the mid 20s in northern Iowa to the lower 30s in far
southwest Iowa. Winds are out of the west to southwest at around 5
to 10 mph. 

Another weak upper level disturbance will move through the region
later today into tonight bringing some chances for light snow or
flurries to far northern and eastern Iowa today into this evening.
Little or no snow accumulation is expected. Warmer air is then on tap
for the Saturday with another slight cool down into Sunday and Monday. 
However temperatures will remain well above average for this time of
year into much of next week. Another weak system could bring some
chances for rain or snow to southern and eastern Iowa Sunday, with dry
conditions returning early next week. 

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

Precision Agriculture Weather Forecast For LYON County


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Regional Hourly Observations For LYON County
Issued at 900 AM CST FRI DEC 15 2017

NORTHWEST IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHEROKEE       MOCLDY    32  28  83 SW8       29.94S WCI  25          
DENISON        CLOUDY    32  25  74 SW12      29.99F WCI  23          
ESTHERVILLE    CLOUDY    30  27  88 W10       29.89S WCI  21          
LE MARS        CLOUDY    32  27  80 SW9       29.93F WCI  24          
ORANGE CITY    MOCLDY    34  30  86 W12       29.91F WCI  25          
SHELDON        CLOUDY    32  28  86 W14       29.89F WCI  22          
SIOUX CITY     CLOUDY    33  25  72 W8        29.97F WCI  26          
SPENCER        CLOUDY    32  28  85 W12       29.90F WCI  23          
STORM LAKE     MOSUNNY   32  27  80 W14       29.93S WCI  22          

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


Current Agricultural Weather Conditions in Iowa
Based on observations at 900am CST, Friday December 15, 2017

Across Iowa...temperatures are near 33 degrees west, near 33 degrees central, and near 26 degrees east. Current sky conditions are cloudy west, cloudy central, and cloudy east. In the west, relative humidity is near 72%, and the dew point is near 25 degrees. In the central part of the state, relative humidity is near 69%, and the dew point is near 24 degrees. In the east, relative humidity is near 74%, and the dew point is near 19 degrees. Winds are from the west at 8 mph west, where conditions are favorable for spraying. The wind chill is near 26 degrees west. Winds are from the southwest at 9 mph central, where conditions are favorable for spraying. The wind chill is near 25 degrees central. Winds are from the west at 14 mph east, where conditions are not favorable for spraying due to strong winds. The wind chill is near 14 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 34 degrees at Harlan and Clarinda. The lowest temperature is 26 degrees at Dubuque, Davenport, and Cedar Rapids.


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 LYON County,IA

318 AM CST Fri Dec 15 2017

 DAY ONE  Today and Tonight

No hazardous weather is expected at this time. 

 DAYS TWO THROUGH SEVEN  Saturday through Thursday

Accumulating snow is possible next Thursday. At this point, snow
fall amounts and impacts remain uncertain. 

 SPOTTER INFORMATION STATEMENT  

Spotter activation will not be needed.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For LYON County, IA
843 AM CST Fri Dec 15 2017

REST OF TODAY
Cloudy in the morning then becoming partly sunny. Highs around 40. Southwest winds 10 to 15 mph.

TONIGHT
Mostly cloudy in the evening then becoming partly cloudy. Lows around 26. Southwest winds 5 to 10 mph.

SATURDAY
Partly sunny. Highs around 43. Northwest winds 5 to 10 mph becoming north in the afternoon.

SATURDAY NIGHT
Mostly cloudy. Lows around 24. Northeast winds 5 to 10 mph.

SUNDAY
Mostly cloudy. Highs around 35. North winds 10 to 15 mph decreasing to 5 to 10 mph in the afternoon.

SUNDAY NIGHT
Mostly cloudy in the evening then becoming partly cloudy. Lows around 22.

MONDAY
Partly cloudy. Highs around 42.

MONDAY NIGHT
Partly cloudy. Lows around 25.

TUESDAY
Sunny. Highs around 40.

TUESDAY NIGHT
Partly cloudy. Lows around 21.

WEDNESDAY
Partly sunny. Highs around 42.

WEDNESDAY NIGHT
Mostly cloudy. Lows around 20.

THURSDAY
Mostly cloudy. Snow likely in the morning, then chance of snow in the afternoon. Highs around 25. Chance of snow 60 percent.

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 20-24    DEC 22-28    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:     Normal        Below     Normal      Below                      
 Precipitation:     Normal        Above     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

Friday December 15, 2017 the 349th Day of Year

---------------------------------------------------
SUN
Declination -23.310000
Distance 0.999725 AU
Rise 08:36 EST Set 17:43 EST
Transit Meridian 13:09 EST
Civil Twilight Begins 08:05 EST Ends 18:14 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 15TH
HISTORIC WEATHER EVENTS
...1839...
The first of triple storms hit Massachusetts Bay. The storm produced whole
gales, and more than 20 inches of snow in interior New England. There was
great loss of life at Gloucester MA. (David Ludlum)
...1901...
An intense cold front swept across the eastern U.S. The cold front produced
heavy rain in Louisiana, and heavy snow in the northeastern U.S. (David
Ludlum)
...1945...
A record December snowstorm buried Buffalo NY under 36.6 inches of snow,
with unofficial totals south of the city ranging up to 70 inches. Travel
was brought to a halt by the storm. (14th-17th) (The Weather Channel)
...1987...
A major winter storm hit the Great Lakes Region, intensifying explosively
as it crossed northern Illinois. High winds and heavy snow created blizzard
conditions in southeastern Wisconsin. Winds gusted to 73 mph, and snowfall
totals ranged up to 17 inches at LaFarge. The barometric pressure at
Chicago IL dropped three quarters of an inch in six hours to 28.96 inches,
a record low reading for December. Up to a foot of snow blanketed northern
Illinois, and winds in the Chicago area gusted to 75 mph. O'Hare Airport in
Chicago was closed for several hours, for only the fourth time in twenty
years. High winds derailed train cars at Avon IN. Light winds and partly
sunny skies were reported near the center of the storm, a feature typical
of tropical storms. (The National Weather Summary) (Storm Data)
...1988...
High pressure in the Pacific Northwest and low pressure in the southwestern
U.S. combined to produced high winds from Utah to California. Winds gusting
to 70 mph in the San Francisco area left nearly 300,000 residents without
electricity. Winds in Utah gusted to 105 mph at Centerville. (The National
Weather Summary) (Storm Data)
...1989...
A couple of low pressure systems spread heavy snow across the northeastern
U.S. Up to two feet of snow was reported along Lake Erie in northeastern
Ohio, and up to ten inches was reported in Connecticut. Heavy snow squalls
developed over Michigan for the third day in a row. Three Oaks MI reported
25 inches of snow in two days. Twenty-six cities in the north central U.S.
reported record low temperatures for the date. The low of 10 degrees below
zero at Wichita KS was a December record for that location. (The National
Weather Summary) (Storm Data)

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