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St Louis City County, MO Weather and Climate Synopsis

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Regional Hourly Observations For ST LOUIS CITY County
Issued at 100 AM CST MON DEC 18 2017
...EAST CENTRAL MISSOURI...
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ST LOUIS INTL  CLOUDY    48  43  82 W13       30.06S                  
                   

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


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

Across Missouri...temperatures are near 45 degrees north, near 47 degrees central, and near 45 degrees south. Current sky conditions are cloudy north, cloudy central, and fog south. In the north, relative humidity is near 100%, and the dew point is near 45 degrees. In the central part of the state, relative humidity is near 80%, and the dew point is near 41 degrees. In the south, relative humidity is near 100%, and the dew point is near 45 degrees. There is patchy fog north. Visibility is less than one mile south. Winds are from the southwest at 6 mph north, where conditions are favorable for spraying. Winds are from the west at 6 mph central, where conditions are favorable for spraying. Winds are from the south at 5 mph south, where conditions are not favorable for spraying due to fog. The livestock cold stress index is in the no stress category north, no stress category central, and no stress category south. Based on current available observations, the highest temperature is 48 degrees at Spirit of St. Louis. The lowest temperature is 41 degrees at Whiteman Air Force Base.


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 ST LOUIS CITY County,MO

400 PM CST Sun Dec 17 2017

 DAY ONE  Tonight

No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

No hazardous weather is expected at this time.

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not anticipated tonight.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For ST LOUIS CITY County, MO
1151 PM CST Sun Dec 17 2017

REST OF TONIGHT
Cloudy with patchy drizzle. Near steady temperature in the mid 40s. Southwest wind around 10 mph. Chance of measurable precipitation 20 percent.

MONDAY
Cloudy in the morning and early afternoon then becoming partly sunny. Patchy drizzle in the morning. High in the mid 50s. Southwest wind around 10 mph. Chance of measurable precipitation 20 percent.

MONDAY NIGHT
Mostly clear. Low in the lower 40s. Southwest wind around 10 mph.

TUESDAY
Partly sunny. High in the lower 60s. Light wind.

TUESDAY NIGHT
Partly cloudy. Low in the upper 30s. Light wind in the evening becoming northeast around 10 mph after midnight.

WEDNESDAY
Mostly sunny. High in the lower 50s.

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

THURSDAY
Partly cloudy. High in the upper 50s.

THURSDAY NIGHT
Mostly cloudy with a 20 percent chance of rain. Low in the lower 40s.

FRIDAY
Mostly cloudy with a 30 percent chance of rain. High around 50. Temperature falling into the 40s in the afternoon.

FRIDAY NIGHT
Colder. Partly cloudy with a 20 percent chance of rain and snow. Low in the upper 20s.

SATURDAY
Colder. Partly sunny. High around 40. Temperature steady or slowly falling in the afternoon.

SATURDAY NIGHT AND SUNDAY
Mostly cloudy. Low in the mid 20s. High in the mid 30s.

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 Missouri
                             MISSOURI                                                                     
                 ---------------------------------------------
                 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     Normal                      
 Precipitation:     Normal       Normal     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 08:22 EST Set 17:50 EST
Transit Meridian 13:05 EST
Civil Twilight Begins 07:53 EST Ends 18:19 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