Saint Louis, Missouri Weather Conditions

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Current Conditions

  • 37°
  • Mostly Cloudy
  • Wind: NW 5 mph
  • Humidity: 46%
  • Visibility: 10.0 miles
  • Dew Point: 18°
  • Pressure: 30.50 in. 0
  • Heat Index: 33

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Next 12 Hours

6  pm
9  pm
12  am
3  am
6  am
Clear
Clear
Overcast
Overcast
Overcast
Overcast
Partly Cloudy
Partly Cloudy
Overcast
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30°
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32°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Partly Cloudy
  • High: 40 °
  • Low: 28 °
  • Partly Cloudy
  • Saturday
  • Rain
  • High: 45 °
  • Low: 32 °
  • Rain
  • Sunday
  • Snow
  • High: 41 °
  • Low: 12 °
  • Snow
  • Monday
  • Partly Cloudy
  • High: 27 °
  • Low: 21 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 48 °
  • Low: 30 °
  • Partly Cloudy

Forecast for Saint Louis, Missouri

Updated: 3:00 PM CST on January 30, 2015

  • Friday

    Partly cloudy. High of 39F. Winds from the NNW at 5 to 10 mph.

  • Friday Night

    Overcast. Low of 28F. Winds less than 5 mph.

  • Saturday

    Overcast with a chance of rain, then rain in the afternoon. High of 45F. Winds from the South at 5 to 10 mph. Chance of rain 50%.

  • Saturday Night

    Overcast with rain, then snow and rain after midnight. Low of 32F. Winds from the SSE at 5 to 10 mph. Chance of precipitation 80% .

  • Sunday

    Overcast with snow. High of 41F. Winds from the SW at 5 to 10 mph. Chance of snow 80%.

  • Sunday Night

    Overcast with a chance of snow in the evening, then mostly cloudy. Low of 12F with a windchill as low as 5F. Breezy. Winds from the NNW at 20 to 25 mph.

  • Monday

    Partly cloudy in the morning, then overcast. High of 27F. Winds from the NNW at 5 to 15 mph.

  • Monday Night

    Overcast in the evening, then clear. Low of 21F. Winds from the SSE at 5 to 15 mph.

  • Tuesday

    Clear. High of 48F. Breezy. Winds from the South at 15 to 20 mph.

  • Tuesday Night

    Partly cloudy. Low of 30F. Winds from the SSW at 10 to 15 mph.

  • Wednesday

    Partly cloudy. High of 61F. Breezy. Winds from the NW at 10 to 20 mph shifting to the North in the afternoon.

  • Wednesday Night

    Partly cloudy. Low of 7F. Breezy. Winds from the NNE at 15 to 20 mph.

  • Thursday

    Clear. High of 30F with a windchill as low as -9F. Breezy. Winds from the NNE at 10 to 20 mph.

  • Thursday Night

    Clear. Low of 12F. Winds from the NNE at 5 to 15 mph.

  • Friday

    Clear. High of 45F. Winds from the East at 5 to 10 mph shifting to the SSE in the afternoon.

  • Friday Night

    Clear. Low of 16F with a windchill as low as 5F. Winds from the SSE at 10 to 15 mph.

  • Saturday

    Clear. High of 48F. Winds from the SSW at 5 to 15 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 30F with a windchill as low as 23F. Winds from the SSW at 5 to 10 mph.

  • Sunday

    Clear. Fog early. High of 52F. Winds from the SW at 5 to 10 mph.

  • Sunday Night

    Clear. Low of 32F. Winds less than 5 mph.

  • Monday

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

  • Monday Night

    Clear. Low of 32F. Winds less than 5 mph.

  • Tuesday

    Clear with a chance of rain. High of 50F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.

  • Tuesday Night

    Clear with a chance of rain. Low of 32F. Winds from the NNE at 5 to 10 mph. Chance of rain 30% with rainfall amounts near 0.2 in. possible.

Severe Weather Alert Descriptions

 Special Statement  Statement as of 3:36 PM CST on January 30, 2015


... Winter weather expected across the region this weekend...

A storm system will bring accumulating snow to parts of our
region Saturday night and Sunday. Rain is expected to develop on
Saturday... and then become mixed with and change to snow along and
north of Interstate 70 on Saturday night. By Sunday... snow is
expected along and north of the Interstate 70 corridor... with the
rain gradually becoming mixed with and changing over to snow over
southeast Missouri and southwest Illinois.

Early indications are that the brunt of the storm will impact the
region from southern Iowa across northern Illinois where snowfall
amounts of 8 or more inches are possible. The snowfall amounts
will decrease as you move further south and it appears that 6
inches of snow will be possible over northeast Missouri and west
central Illinois where there is now a Winter Storm Watch in effect
for Saturday night and Sunday. The snowfall will continue to decrease
as you head south... with 1-2 inches along the Interstate 70
corridor... and little or no snowfall accumulation across
southeast Missouri.

There remains higher than normal uncertainty on the temperature
profile of the atmosphere and track of the storm center... thus
changes in the currently forecast snowfall amounts are quite
possible.

Those planning travel across the region Saturday night and Sunday
may encounter hazardous driving conditions... so plan your trip
accordingly. Please be certain to monitor the latest forecast
information... watches... warnings or advisories.



 Public Information Statement  Statement as of 2:25 PM CST on January 30, 2015


... Safety rules for winter storms...

A Winter Storm Watch has been issued by the National Weather
Service. The following safety tips are being provided in
the hope that the broadcast media will frequently air these
messages while the watch affects their area.

For a report of Highway conditions across Missouri, call the
Missouri Highway patrol at 1-800-222-6400. For Illinois
conditions call 1-800-452-4368.

A Winter Storm Watch means that conditions are favorable for
the development of severe winter weather in the designated
area. During the watch there is no cause for immediate
concern. You should, however, plan ahead in case the storm
does develop. Keep informed about the developments of the
storm by listening to NOAA Weather Radio, the voice of the
National Weather Service, or to commercial radio or
television.

A Winter Storm Warning means a winter storm is expected very
soon or is actually occurring. People in the affected area
should take the necessary precautions.

Winter weather advisories, as well as freezing rain
advisories, are issued for lesser events that are not
considered life threatening but will cause an inconvenience.
Unnecessary travel or activity should still be avoided.

If you must travel during the winter, make sure your car is
winterized before winter weather strikes. Be certain your
tires, battery, lights, exhaust, heater, defroster, and
windshield wipers are in good working order. Also make sure
that you begin any trip with a full tank of gas.

A severe winter storm can close roads and knock out
electrical power. If you live in a rural area, you should be
certain your food and medical supplies are adequate before
the storm begins. Check your supply of heating fuel, since
fuel carriers may not be able to reach your house due to ice
or snow covered roads.

Be very careful when using alternative heating sources, such
as fireplaces, stoves, or space heaters. Proper
ventilation is essential to avoid a deadly build-up of Carbon
monoxide. Fire is also a major risk when using such heating
sources, and keep in mind that the Fire Department may not
be able to reach your location during a winter storm.

If you must venture outdoors, dress for the conditions.
Wear several layers of light-weight warm clothing. Outer
garments should be Waterproof and hooded. For the hands,
mittens snug at the wrist offer better protection than
fingered gloves.

The cold will feel intense when the wind is blowing. Strong
winds cause a pronounced increase in the chilling effect of
low temperatures. In a 20 mile per hour wind, a temperature
of 20 degrees becomes the equivalent of 4 degrees above zero.
Increase that wind to 35 miles per hour, and the effect drops
to zero.



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Branch Street, St. Louis, MO

Updated: 4:50 PM CST

Temperature: 39.0 °F Dew Point: - Humidity: 43% Wind: North at - Pressure: 30.02 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: BLAIR STREET, St. Louis, MO

Updated: 4:50 PM CST

Temperature: 39.7 °F Dew Point: - Humidity: 47% Wind: North at - Pressure: 29.94 in Hourly Precipitation: - Windchill: 40 °F Graphs

Location: Soulard, Saint Louis, MO

Updated: 5:05 PM CST

Temperature: 36.5 °F Dew Point: 17 °F Humidity: 45% Wind: Calm Pressure: 30.13 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: APRSWXNET St Louis MO US, Saint Louis, MO

Updated: 4:31 PM CST

Temperature: 45 °F Dew Point: 20 °F Humidity: 37% Wind: Calm Pressure: 30.46 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: RAWS MBOT MO US, Saint Louis, MO

Updated: 4:19 PM CST

Temperature: 40 °F Dew Point: 16 °F Humidity: 37% Wind: WSW at 1 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Forest Park, St. Louis, MO

Updated: 4:50 PM CST

Temperature: 39.6 °F Dew Point: - Humidity: 35% Wind: North at - Pressure: 29.86 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Holly Hills, Saint Louis, MO

Updated: 5:10 PM CST

Temperature: 37.9 °F Dew Point: 15 °F Humidity: 39% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 4:57 PM CST

Temperature: 39.0 °F Dew Point: 22 °F Humidity: 51% Wind: Calm Pressure: 30.44 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: Franz Park, St. Louis, MO

Updated: 5:10 PM CST

Temperature: 38.5 °F Dew Point: 23 °F Humidity: 54% Wind: North at - Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Boulevard Heights, St. Louis, MO

Updated: 5:10 PM CST

Temperature: 41.0 °F Dew Point: 26 °F Humidity: 54% Wind: North at - Pressure: 30.54 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Lindenwood Park, Saint Louis, MO

Updated: 5:06 PM CST

Temperature: 36.3 °F Dew Point: 26 °F Humidity: 66% Wind: North at - Pressure: 30.42 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: BROADWAY (South), St. Louis, MO

Updated: 4:50 PM CST

Temperature: 40.1 °F Dew Point: - Humidity: 35% Wind: North at - Pressure: 29.83 in Hourly Precipitation: - Windchill: 40 °F Graphs

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

Updated: 3:55 PM CST

Temperature: 40 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 5:04 PM CST

Temperature: 38.3 °F Dew Point: 20 °F Humidity: 48% Wind: SW at 1.1 mph Pressure: 30.44 in Hourly Precipitation: - Windchill: 38 °F Graphs

Location: Ladue, St. Louis, MO

Updated: 4:50 PM CST

Temperature: 42.4 °F Dew Point: - Humidity: 36% Wind: North at - Pressure: 29.79 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Parkridge, Brentwood, MO

Updated: 5:10 PM CST

Temperature: 37.9 °F Dew Point: - Humidity: - Wind: Calm Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: APRSWXNET Affton MO US, Saint Louis, MO

Updated: 4:17 PM CST

Temperature: 36 °F Dew Point: 19 °F Humidity: 49% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: South County, Affton, MO

Updated: 5:10 PM CST

Temperature: 34.5 °F Dew Point: 18 °F Humidity: 51% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 5:09 PM CST

Temperature: 37.1 °F Dew Point: 10 °F Humidity: 32% Wind: ESE at 4.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 5:11 PM CST

Temperature: 38.0 °F Dew Point: 22 °F Humidity: 52% Wind: Calm Pressure: 30.48 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: BUCKLEY MEADOWS 4, Saint Louis, MO

Updated: 5:07 PM CST

Temperature: 36.5 °F Dew Point: 19 °F Humidity: 48% Wind: SSE at 1.7 mph Pressure: 30.32 in Hourly Precipitation: - Windchill: 36 °F Graphs

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

Updated: 5:07 PM CST

Temperature: 38.1 °F Dew Point: 20 °F Humidity: 47% Wind: NNW at 2.0 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: APRSWXNET Belleville IL US, Belleville, IL

Updated: 4:27 PM CST

Temperature: 41 °F Dew Point: 18 °F Humidity: 39% Wind: Calm Pressure: 31.50 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: West End, Belleville, IL

Updated: 5:10 PM CST

Temperature: 37.9 °F Dew Point: 1 °F Humidity: 39% Wind: Calm Pressure: 31.51 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Millstadt, Millstadt, IL

Updated: 5:11 PM CST

Temperature: 34.9 °F Dew Point: 23 °F Humidity: 62% Wind: Calm Pressure: 30.52 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: APRSWXNET Millstadt IL US, Millstadt, IL

Updated: 4:35 PM CST

Temperature: 38 °F Dew Point: 26 °F Humidity: 61% Wind: Calm Pressure: 30.52 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Collinsville West, Collinsville, IL

Updated: 5:10 PM CST

Temperature: 36.3 °F Dew Point: 19 °F Humidity: 49% Wind: Calm Pressure: 30.49 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
329 PM CST Fri Jan 30 2015 


Short term: (through late tonight) 
issued at 328 PM CST Fri Jan 30 2015 


Tranquil weather and seasonably cold weather conditions expected 
tonight. Extensive high clouds currently located across the plains 
in advance of the western U.S. Trof are filtering into the area this 
afternoon. These clouds will continue to increase and thicken 
tonight while the surface high currently centered through the County Warning Area 
slowly retreats eastward. 


Glass 


Long term: (saturday through next friday) 
issued at 328 PM CST Fri Jan 30 2015 


Clouds along with rain will spread eastward through much of our 
forecast area, particularly north and west of stl on Saturday as a 
southwesterly low level jet brings increasing low level warm air 
advection and moisture into our ahead ahead of an approaching storm 
system. It appears that the precipitation type will be mainly 
liquid rain on Saturday, although there is a possibility of a brief 
period of snow/sleet across northeast and central MO if the 
precipitation makes it into this area already by early to mid 
morning when the surface layer will still be quite cold. There will 
also be some evaporational cooling at the onset of the precipitation 
as well. Precipitation should spread throughout the entire forecast 
area Saturday night and intensify with the approach of a strong 
northern stream shortwave and as a surface low develops over 
southwestern MO. The models also depict upper level divergence, 
particularly across northeast MO and west central Illinois in the right 
entrance region of an upper level jet streak over the Great Lakes 
region. The rain will gradually change over to snow, mainly across 
northeast MO and west central Illinois Saturday night as a cold front sags 
southward into this area and pseudo adiabatic cooling increases due 
to stronger upward vertical motion. The surface low will track 
eastward through southern portions of MO and Illinois on Sunday, while the 
850 mb low moves eastward through northern MO and central Illinois. The 
precipitation will continue on Sunday with a gradual changeover to 
snow across most of the rest of the forecast area as colder air 
filters into the region behind the surface/850 mb low and causes the 
freezing level to drop. Surface temperatures across much of our 
area late Sunday morning and afternoon may be nearly steady or 
slowly fall. The latest model runs have trended further north 
with the storm system and are now slower with the change over to 
snow across central and southeast MO as well as southwest Illinois. This 
will lead to less snow accumulation across this area, but am still 
expecting significant snowfall across northeast MO and west central 
Illinois where the greatest forcing is expected along with the quickest 
changeover to snow. Although it is still a little early to pin down 
exact snowfall totals as the models continue to vary from run to 
run, but preliminary forecasted amounts will range from 6 to 8 
inches across parts of northeast MO and west central Illinois down to 
around 1 to 3 inches across parts of central MO and southwest Illinois to 
less than 1 inch further south over southeast MO. With forecasted 
snowfall totals reaching and slightly exceeding 6 inches over the 
extreme northern portion of our forecast area will issue a Winter 
Storm Watch for this area for Saturday night and Sunday. There may 
be some lingering light snow in the deformation zone mainly across 
northeast MO and west central into southwest Illinois Sunday evening, but 
it should be tapering off with time Sunday night. Strong and gusty 
winds may produce some blowing and drifting snow across the northern 
portion of our forecast area Sunday afternoon and evening. Much 
colder temperatures are expected Sunday night behind the storm 
system as the models drop the -12 degree c 850 mb isotherm south of 
stl Sunday night. 


A cold day is on tap for Monday with below normal temperatures as a 
large surface high settles into the area in the wake of the 
departing vigorous upper trof and attendant cold front. The flow 
aloft then becomes broadly cyclonic after this vigorous upper trof 
departs the region and this will allow for several lower amplitude 
disturbances to traverse the area within the flow aloft, one of 
which will bring a cold front midweek. We should see a brief 
moderation in temperatures Tuesday into early Wednesday with the 
next strong cold front pushing through the region during the day 
Wednesday. I am not expecting much if anything in the way of 
precipitation but there is some Post-frontal frontogenetical forcing 
that is worthy of a low pop. Cold weather with below average 
temperatures will prevail through the week's end as high pressure 
dominates. 


Gks/glass 


&& 


Aviation: (for the 18z tafs through 18z Saturday afternoon) 
issued at 1114 am CST Fri Jan 30 2015 


VFR flight conditions will prevail for the valid forecast period. 
High clouds will steadily increase across the region this 
afternoon and tonight as a large surface high slowly retreats 
eastward. Mid and eventually lower clouds will begin spreading 
into the area on Saturday morning. The onset of precipitation with 
the next storm system is a bit tricky in timing. At most 
terminals the onset will be after the valid taf forecast period, 
however light rain will probably develop at kcou between 15-18z 
Sat 31 Jan. 


Specifics for kstl: 


VFR flight conditions will prevail for the valid forecast period. 
High clouds will steadily increase this afternoon and tonight as 
a large surface high slowly retreats eastward. Mid clouds will 
begin spreading into the area on Saturday morning with lower clouds 
on Saturday afternoon. The onset of precipitation with the next 
storm system is a bit tricky, but current thoughts are light rain 
will probably develop at kstl around 21z Sat 31 Jan. 


Glass 


&& 


Lsx watches/warnings/advisories: 
MO...Winter Storm Watch from Saturday evening through Sunday 
afternoon for Knox MO-Lewis MO-Marion MO-Shelby MO. 


Illinois...Winter Storm Watch from Saturday evening through Sunday 
afternoon for Adams Illinois-Brown Illinois-Pike Illinois. 


&& 


$$ 


Weather forecast office lsx 












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