Saint Louis, Missouri Weather Conditions

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Current Conditions

  • 27°
  • Light Snow
  • Wind: East 4 mph
  • Humidity: 80%
  • Visibility: 3.0 miles
  • Dew Point: 21°
  • Pressure: 30.37 in. +
  • Heat Index: 23

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Next 12 Hours

3  am
6  am
9  am
12  pm
3  pm
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Chance of Snow
Chance of Snow
27°
32°
28°
36°
32°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Snow
  • High: 36 °
  • Low: 21 °
  • Snow
  • Monday
  • Ice Pellets
  • High: 41 °
  • Low: 32 °
  • Ice Pellets
  • Tuesday
  • Thunderstorm
  • High: 50 °
  • Low: 25 °
  • T-Storms
  • Wednesday
  • Partly Cloudy
  • High: 30 °
  • Low: 18 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 27 °
  • Low: 18 °
  • Partly Cloudy

Forecast for Saint Louis, Missouri

Updated: 3:00 AM CST on March 01, 2015

Winter Storm Warning in effect until 6 PM CST Sunday...
  • Sunday

    Overcast with snow. High of 36F. Winds less than 5 mph. Chance of snow 80%.

  • Sunday Night

    Overcast in the evening, then mostly cloudy. Low of 21F. Winds from the NW at 5 to 10 mph.

  • Monday

    Mostly cloudy. High of 41F. Winds less than 5 mph. Chance of rain 20%.

  • Monday Night

    Overcast with ice pellets and rain, then ice pellets after midnight. Low of 32F with a windchill as low as 25F. Winds from the SE at 5 to 10 mph. Chance of precipitation 60% .

  • Tuesday

    Overcast with thunderstorms and rain showers. High of 50F. Winds from the South at 10 to 15 mph. Chance of rain 80% with rainfall amounts near 0.6 in. possible.

  • Tuesday Night

    Overcast with a chance of snow. Low of 25F with a windchill as low as 12F. Breezy. Winds from the WNW at 20 to 25 mph.

  • Wednesday

    Overcast. High of 30F with a windchill as low as 16F. Breezy. Winds from the NNW at 15 to 20 mph.

  • Wednesday Night

    Overcast in the evening, then mostly cloudy. Low of 18F. Winds from the North at 5 to 15 mph.

  • Thursday

    Partly cloudy. High of 27F. Winds from the NNW at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 18F with a windchill as low as 10F. Winds from the SSE at 10 to 15 mph.

  • Friday

    Clear. High of 55F. Breezy. Winds from the South at 15 to 20 mph.

  • Friday Night

    Clear. Low of 28F. Winds from the SSW at 10 to 15 mph.

  • Saturday

    Clear. High of 48F. Winds from the WSW at 10 to 15 mph shifting to the NW in the afternoon.

  • Saturday Night

    Clear. Low of 25F. Winds from the NNW at 5 to 10 mph.

  • Sunday

    Clear. High of 43F. Winds from the SW at 5 to 10 mph.

  • Sunday Night

    Clear. Low of 28F. Winds from the SSW at 5 to 10 mph.

  • Monday

    Clear. Fog early. High of 45F. Winds from the SSW at 5 to 10 mph.

  • Monday Night

    Clear. Low of 30F. Winds less than 5 mph.

  • Tuesday

    Clear. High of 50F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 36F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 50F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 36F. Winds less than 5 mph.

Severe Weather Alert Descriptions

 Winter Storm Warning  Statement as of 6:26 PM CST on February 28, 2015


... Winter Storm Warning remains in effect until 6 PM CST Sunday...

* timing... snow will continue across the region this evening.
There will be a bit of a lull later tonight... but snow will
reintensify on Sunday morning... esecially along and north of
Interstate 70.

* Accumulations... 5 to 7 inches of snow.

* Winds... south 5 mph or less.

* Impacts... the wintry precipitation will result in hazardous
travel conditions... especially on bridges... overpasses... and
untreated roads. Parking lots and sidewalks will become
slippery as well.

Precautionary/preparedness actions...

A Winter Storm Warning means that 6 inches or more of snow is
expected. The rapid accumulation of snow will make travel
extremely difficult... if not impossible. If travel is necessary...
make sure to exercise caution. Begin your travel with a tank
full of gas... and carry a winter storm kit which includes a
shovel... flashlight... cellphone... and blankets of extra warm
clothing.






 Local Storm Report 



02/28/2015 0657 PM

St. Louis, St Louis city County.

Snow m2.5 inch, reported by amateur radio.


            Locust and Washington





02/28/2015 0703 PM

St. Louis, St Louis city County.

Sleet m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0657 PM

St. Louis, St Louis city County.

Snow m2.5 inch, reported by amateur radio.


            Locust and Washington





02/28/2015 0703 PM

St. Louis, St Louis city County.

Snow m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0703 PM

St. Louis, St Louis city County.

Snow m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0703 PM

St. Louis, St Louis city County.

Snow m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0703 PM

St. Louis, St Louis city County.

Sleet m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0703 PM

St. Louis, St Louis city County.

Sleet m2.0 inch, reported by trained spotter.


            At macklind and pernod





02/28/2015 0657 PM

St. Louis, St Louis city County.

Snow m2.5 inch, reported by amateur radio.


            Locust and Washington





02/28/2015 0657 PM

St. Louis, St Louis city County.

Snow m2.5 inch, reported by amateur radio.


            Locust and Washington





02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m0.5 inch, reported by amateur radio.






02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m1.0 inch, reported by amateur radio.






02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m0.5 inch, reported by amateur radio.






02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m0.5 inch, reported by amateur radio.






02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m1.0 inch, reported by amateur radio.






02/28/2015 0409 PM

St. Louis, St Louis city County.

Snow m1.0 inch, reported by amateur radio.





Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Branch Street, St. Louis, MO

Updated: 12:50 AM CST

Temperature: 24.8 °F Dew Point: - Humidity: 90% Wind: North at - Pressure: 29.94 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: BLAIR STREET, St. Louis, MO

Updated: 12:50 AM CST

Temperature: 25.3 °F Dew Point: - Humidity: 94% Wind: North at - Pressure: 29.90 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: Soulard, Saint Louis, MO

Updated: 2:10 AM CST

Temperature: 24.8 °F Dew Point: 24 °F Humidity: 95% Wind: Calm Pressure: 30.08 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: Shaw/Tower Grove, St. Louis, MO

Updated: 2:21 AM CST

Temperature: 25.5 °F Dew Point: 24 °F Humidity: 92% Wind: Calm Pressure: 30.43 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Forest Park, St. Louis, MO

Updated: 12:50 AM CST

Temperature: 24.3 °F Dew Point: - Humidity: 88% Wind: North at - Pressure: 29.81 in Hourly Precipitation: 0.02 in Windchill: 24 °F Graphs

Location: Holly Hills, Saint Louis, MO

Updated: 2:24 AM CST

Temperature: 26.6 °F Dew Point: 21 °F Humidity: 80% Wind: Calm Pressure: 29.60 in Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 2:14 AM CST

Temperature: 24.8 °F Dew Point: 23 °F Humidity: 94% Wind: Calm Pressure: 30.35 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: Franz Park, St. Louis, MO

Updated: 2:20 AM CST

Temperature: 26.2 °F Dew Point: 24 °F Humidity: 92% Wind: North at - Pressure: 30.33 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Boulevard Heights, St. Louis, MO

Updated: 2:20 AM CST

Temperature: 30.9 °F Dew Point: 25 °F Humidity: 78% Wind: North at - Pressure: 30.46 in Hourly Precipitation: - Windchill: 31 °F Graphs

Location: Lindenwood Park, Saint Louis, MO

Updated: 2:20 AM CST

Temperature: 27.0 °F Dew Point: 22 °F Humidity: 82% Wind: North at - Pressure: 30.33 in Hourly Precipitation: - Windchill: 27 °F Graphs

Location: MesoWest NAMOK1 IL US UPR, Granite City, IL

Updated: 12:30 AM CST

Temperature: 30 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: MesoWest NAMOK2 IL US UPR, Granite City, IL

Updated: 12:25 AM CST

Temperature: 26 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 2:21 AM CST

Temperature: 25.7 °F Dew Point: 24 °F Humidity: 93% Wind: Calm Pressure: 30.35 in Hourly Precipitation: - Windchill: 26 °F Graphs

Location: Ladue, St. Louis, MO

Updated: 12:50 AM CST

Temperature: 25.5 °F Dew Point: - Humidity: 87% Wind: North at - Pressure: 29.75 in Hourly Precipitation: - Windchill: 26 °F Graphs

Location: Parkridge, Brentwood, MO

Updated: 2:23 AM CST

Temperature: 25.5 °F Dew Point: - Humidity: - Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: South County, Affton, MO

Updated: 2:24 AM CST

Temperature: 25.4 °F Dew Point: 24 °F Humidity: 94% Wind: Calm Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 2:20 AM CST

Temperature: 25.6 °F Dew Point: 25 °F Humidity: 96% Wind: ENE at 2.0 mph Pressure: 30.33 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Raritan Drive, Webster Groves, MO

Updated: 2:21 AM CST

Temperature: 26.6 °F Dew Point: 24 °F Humidity: 91% Wind: North at - Pressure: 30.44 in Hourly Precipitation: - Windchill: 27 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 2:24 AM CST

Temperature: 25.7 °F Dew Point: 24 °F Humidity: 94% Wind: Calm Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: BUCKLEY MEADOWS 4, Saint Louis, MO

Updated: 2:22 AM CST

Temperature: 25.2 °F Dew Point: 25 °F Humidity: 99% Wind: Calm Pressure: 30.16 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: City of Olivette - Public Works, Olivette, MO

Updated: 2:22 AM CST

Temperature: 25.9 °F Dew Point: 24 °F Humidity: 93% Wind: ESE at 2.0 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: West End, Belleville, IL

Updated: 2:24 AM CST

Temperature: 25.9 °F Dew Point: 16 °F Humidity: 85% Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Millstadt, Millstadt, IL

Updated: 2:24 AM CST

Temperature: 24.4 °F Dew Point: 18 °F Humidity: 75% Wind: Calm Pressure: 30.55 in Hourly Precipitation: 0.00 in Windchill: 24 °F Graphs

Location: Collinsville West, Collinsville, IL

Updated: 2:23 AM CST

Temperature: 23.9 °F Dew Point: 23 °F Humidity: 95% Wind: East at 3.0 mph Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 24 °F Graphs

Location: Crestwood, Crestwood, MO

Updated: 2:20 AM CST

Temperature: 25.3 °F Dew Point: 22 °F Humidity: 89% Wind: Calm Pressure: 30.11 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 2:24 AM CST

Temperature: 24.8 °F Dew Point: 23 °F Humidity: 93% Wind: Calm Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

Location: Tim and Carolyns yard, COLLINSVILLE, IL

Updated: 2:24 AM CST

Temperature: 25.0 °F Dew Point: 21 °F Humidity: 86% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

Location: APRSWXNET Ladue MO US, Saint Louis, MO

Updated: 1:51 AM CST

Temperature: 25 °F Dew Point: 23 °F Humidity: 93% Wind: Calm Pressure: 30.43 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated aviation 
National Weather Service St Louis MO 
1205 am CST sun Mar 1 2015 


Update: 
issued at 921 PM CST Sat Feb 28 2015 


Latest reports have come in between 4 and 6 inches south of 
Interstate 44 with the back edge of the steadier moderate snow 
beginning to move toward the Mississippi River. Further north...a 
more narrow band of snow aided by strong 700-hpa frontogenesis has 
had moderate to heavy snow across portions of central and 
northeast Missouri as well as west-central Illinois. Have boosted 
totals a couple of inches from just north of Columbia through 
Mexico and Bowling Green toward Pittsfield Illinois. Still uncertain as 
to how this plays out tonight and into tomorrow but believe 
precipitation across much of area may become more 
scattered/showery in nature with areas down south mixing with 
sleet and/or freezing rain after midnight tonight. 


Gosselin 


&& 


Short term: (tonight through sunday) 
issued at 400 PM CST Sat Feb 28 2015 


Going forecast trends still looking good, with latest guidance 
still indicating two shots of snow across the forecast area over the next 24 hours. 
Have made some changes to snowfall accumulations (discussed 
below), but current headlines still depict this winter weather 
threat quite well so no changes are needed at this time. 


Initial surge of snowfall with strong warm air advection/isentropic ascent has now 
worked across the entire County Warning Area. Radar trends are supporting short 
range high res guidance which depicts strongest isentropic lift 
and heaviest precip/snowfall surging from the Ozarks into 
southern Illinois into the evening hours. Based on regional radar 
composite and reports over sgf's cwa, fairly heavy snowfall and 
rapid accumulations can be expected across the southeast half of 
the cwa, with the stl Metro on the northern edges of this 
activity. 


With the latest guidance indicating the air mass remaining colder over 
southern sections of the County Warning Area any significant mix of ptypes should 
be confined to our far southern counties, and it may be that any 
"mix" will be snow transitioning to a bit of freezing drizzle as 
the strongest lift exits the region later this evening. Based on 
the fairly heavy shot of snow this evening, as well as the ptype 
precip type remaining as snow longer than earlier expected, have 
boosted snowfall totals across most of our southern counties by 
several inches. Forecast is depicting a very tight snowfall 
gradient between familiar and cgi, and evening shift will be watching 
trends to tweak this gradient. 


While there will likely be a lull in the snowfall overnight, 
another round of accumulating snowfall is expected to develop later 
tonight and into at least Sunday morning....associated with west-east 
band of frontogenetical forcing. While intensity of this forcing 
varies depending on which model you are viewing, there is 
surprisingly good agreement in quantitative precipitation forecast fields on the development of 
this snowfall. I've attempted to trim pops a bit in our far north 
based on position of the forcing and qpf, while forecasting 
another several inches of snow in this band primarily north of 
I-70. It's certainly possible that there could be a narrow 
corridor of even heavier snowfall, but will leave this fine-tuning 
to short range updates when the meso-scale features become defined 
on radar trends. 


Precipitation should wind down over southeast sections of the County Warning Area 
on Sunday evening, followed by dry weather Monday and Monday night. 


Truett 


Long term: (sunday through next saturday) 
issued at 400 PM CST Sat Feb 28 2015 


A shortwave ejects from the cutoff low near California on Monday and induces 
surface cyclogenesis near the Colorado/Kansas border on Monday night. The 
surface low lifts quickly northeastward Monday night through early 
Tuesday night, first swinging a warm front northeastward and then 
sending a cold front southeastward through MO/IL. This low pressure 
system will bring a period of active weather to the cwa, especially 
on Monday night and Tuesday. 


Strong moisture convergence on the nose of the 850 mb low level jet interacting 
with the lifting warm front aloft should produce an area of 
precipitation on Monday night, especially in the presence of large 
scale ascent from rer 300 mb jet dynamics. The combination of cold air 
at the surface and strong warm air advection aloft is favorable for freezing rain 
and sleet. Sleet should be limited to the northern half of the County Warning Area 
where the depth of cold air will be greater and the warm nose will 
be more shallow, at least at first. As low level temps warm up on 
Tuesday morning due to a combination of warm air advection and diurnal rises, the 
precipitation will transition from freezing rain or freezing rain/ice pellets to rain. 


Tuesday will likely be the warmest day of the week due to the 
lifting warm front. Temperatures will rise into the mid 40s to mid 
50s. On Tuesday, precipitable water values rise to between 1" and 1.3", which is 
around +2 Standard deviations above normal for March. These values 
are notable because the precipitable water normals for March were calculated over 
the entire month, and Mon/Tue will only be a couple of days into the 
month. In other words, there will be an unusually high amount of 
moisture available. Rer 500 mb jet dynamics will add to the large-scale 
ascent ahead of the upper vort Max. Expect widespread rain with 
scattered embedded thunderstorms on Tuesday into early Tuesday 
night. Some of the precipitation may change back over to rain/snow or snow 
behind the cold front within the colder air. 


The aforementioned cold front should be moving through the County Warning Area by 
00z Wed. An Arctic high pressure center then spills into the region 
behind the cold front, bringing temperatures back down into the 20s 
on Wednesday and Thursday. The remainder of the cutoff low over California 
will become absorbed into the flow and lift eastward on Wednesday 
night and Thursday. Temperatures may rebound back towards more 
seasonable values on Friday after the Arctic high pressure center 
shifts eastward and return flow commences. 


Kanofsky 


&& 


Aviation: (for the 06z tafs through 06z Sunday night) 
issued at 1140 PM CST Sat Feb 28 2015 


Widespread snow should become more scattered or banded late 
tonight into early Sunday morning. It appears that the snow should 
first taper off in cou, then eventually taper off in uin and the 
St Louis Metro area towards morning. The visibilities should 
continue to improve through the morning with the snow ending by 
18z Sunday. The low cigs around 1000-2000 feet in height should 
scatter out Sunday evening as drier air filters southeastward 
into the region. Light surface winds should become nwly Sunday 
afternoon as a surface ridge builds southeastward into our area. 


Specifics for kstl: snow should begin to taper off towards morning 
and become less continuous with gradually improving visibilities. 
The snow should end by 18z Sunday. The 1000-2000 feet ceilings 
should scatter out Sunday evening. The light surface wind will 
become nwly Sunday afternoon. 


Gks 


&& 


Preliminary point temperatures/pops: 
Saint Louis 24 35 20 35 / 80 80 10 10 
Quincy 19 31 15 32 / 80 80 10 10 
Columbia 22 34 19 37 / 80 80 10 10 
Jefferson City 24 35 19 38 / 70 80 10 10 
Salem 26 34 20 35 / 90 80 20 10 
Farmington 24 37 22 37 / 90 70 20 10 


&& 


Lsx watches/warnings/advisories: 
MO...Winter Storm Warning until noon CST Sunday for Crawford MO- 
Washington MO. 


Winter Weather Advisory until noon CST Sunday for Iron MO- 
Madison MO-Reynolds MO-St. Francois MO-Ste. Genevieve MO. 


Winter Storm Warning until 6 PM CST Sunday for Franklin MO- 
Gasconade MO-Jefferson MO-Lincoln MO-Osage MO-St. Charles 
MO-St. Louis city MO-St. Louis MO-Warren MO. 


Winter Weather Advisory until 6 PM CST Sunday for Audrain MO- 
Boone MO-Callaway MO-Cole MO-Knox MO-Lewis MO-Marion MO- 
Moniteau MO-Monroe MO-Montgomery MO-Pike MO-Ralls MO-Shelby 
MO. 


Illinois...Winter Weather Advisory until noon CST Sunday for Randolph Illinois. 


Winter Storm Warning until 6 PM CST Sunday for Bond Illinois-Calhoun 
Illinois-Clinton Illinois-Fayette Illinois-Greene Illinois-Jersey Illinois-Macoupin Illinois- 
Madison Illinois-Monroe Illinois-Montgomery IL-St. Clair Illinois. 


Winter Weather Advisory until 6 PM CST Sunday for Adams Illinois-Brown 
Illinois-Marion Illinois-Pike Illinois-Washington Illinois. 


&& 


$$ 


Weather forecast office lsx 



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