Chesterfield, Missouri Weather Conditions

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Excessive Heat Warning View All Alerts

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Current Conditions

  • 75°
  • Scattered Clouds
  • Wind: Calm
  • Humidity: 87%
  • Visibility: 9.0 miles
  • Dew Point: 71°
  • Pressure: 30.06 in. +

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Next 12 Hours

7  am
10  am
1  pm
4  pm
7  pm
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
72°
84°
90°
88°
86°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 72 °
  • Chance of T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 70 °
  • Chance of a Thunderstorm
  • Friday
  • Chance of a Thunderstorm
  • High: 93 °
  • Low: 70 °
  • Chance of a Thunderstorm
  • Saturday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 68 °
  • Chance of T-Storms
  • Sunday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 70 °
  • Chance of T-Storms

Forecast for Chesterfield, Missouri

Updated: 4:00 AM CDT on August 27, 2014

Excessive heat warning in effect until 8 PM CDT this evening...
  • Wednesday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F with a heat index of 97F. Winds less than 5 mph. Chance of rain 30%.

  • Wednesday Night

    Overcast with a chance of a thunderstorm and a chance of rain in the evening, then partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 72F. Winds from the ESE at 5 to 10 mph. Chance of rain 20%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F with a heat index of 95F. Winds from the South at 5 to 10 mph. Chance of rain 20%.

  • Thursday Night

    Partly cloudy. Low of 70F. Winds from the SSE at 5 to 10 mph.

  • Friday

    Clear with a chance of a thunderstorm and a chance of rain in the morning, then mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 93F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.

  • Friday Night

    Overcast with a chance of a thunderstorm and a chance of rain, then a chance of a thunderstorm and rain after midnight. Low of 70F. Winds from the South at 5 to 10 mph. Chance of rain 50%.

  • Saturday

    Overcast with a chance of a thunderstorm and rain. High of 88F. Winds from the SSW at 5 to 10 mph. Chance of rain 60%.

  • Saturday Night

    Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy with a chance of a thunderstorm and rain. Low of 68F. Winds from the SSW at 5 to 10 mph. Chance of rain 50%.

  • Sunday

    Overcast with a chance of a thunderstorm and rain. High of 90F. Winds from the SSW at 5 to 10 mph. Chance of rain 50%.

  • Sunday Night

    Clear. Low of 70F. Winds from the South at 5 to 15 mph.

  • Monday

    Partly cloudy. High of 90F. Winds from the SSW at 5 to 15 mph.

  • Monday Night

    Clear. Low of 72F. Winds from the SSW at 5 to 10 mph.

  • Tuesday

    Mostly cloudy. High of 88F. Winds from the SSW at 10 to 15 mph.

  • Tuesday Night

    Clear. Low of 72F. Winds from the SSW at 5 to 15 mph.

  • Wednesday

    Clear. High of 95F. Winds from the SW at 5 to 15 mph.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 20%.

  • Thursday

    Partly cloudy. High of 90F. Winds less than 5 mph.

  • Thursday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Partly cloudy. High of 84F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 50%.

  • Saturday

    Partly cloudy. Fog early. High of 86F. Winds less than 5 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 61F. Winds less than 5 mph.

Severe Weather Alert Descriptions

 Excessive Heat Warning  Statement as of 3:03 am CDT on August 27, 2014


... Excessive heat warning remains in effect until 8 PM CDT this
evening...

* timing... dangerous heat and humidity will continue this
afternoon and early this evening.

* Heat index values... 100 to 105 degrees this afternoon and
evening.

* Impacts... the combination of hot temperatures and high
humidity will lead to an increased risk of heat-related stress
and illness. The very Young... the elderly... those without air
conditioning... and those participating in strenuous outdoor
activities will be the most susceptible. Also... car interiors
will reach lethal temperatures in a matter of minutes. Beat
the heat... check the backseat! Never leave children or pets
unattended in a vehicle... not even for a minute.

Precautionary/preparedness actions...

Take extra precautions if you work or spend time outside. When
possible... reschedule strenuous activities to the early morning
or evening. Know the signs and symptoms of heat exhaustion and
heat stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work... the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency. Call 9-1-1 immediately.

People in the St. Louis metropolitan area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United way of greater St. Louis at
800-427-4626... or if calling from a land line phone dial 2-1-1.
You can also call cool down St. Louis at 314-241-7668.






 Record Report  Statement as of 08:00 am CDT on August 26, 2014


... Record highest minimum temperature set at St. Louis...

A record high minimum temperature of 81 degrees was set at St. Louis
Lambert international Airport yesterday... August 25th. This breaks the
previous record of 80 set in 1943.



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Winding Trails, Ballwin, MO

Updated: 8:03 AM CDT

Temperature: 75.1 °F Dew Point: 73 °F Humidity: 92% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Oakwood Farms, Ballwin, MO

Updated: 8:07 AM CDT

Temperature: 75.1 °F Dew Point: 72 °F Humidity: 89% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 7:57 AM CDT

Temperature: 74.6 °F Dew Point: 72 °F Humidity: 92% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Westglen Village, Ballwin, MO

Updated: 8:07 AM CDT

Temperature: 74.6 °F Dew Point: 72 °F Humidity: 91% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Arbor Valley, Ballwin, MO

Updated: 8:06 AM CDT

Temperature: 76.7 °F Dew Point: 72 °F Humidity: 87% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 8:07 AM CDT

Temperature: 77.5 °F Dew Point: 73 °F Humidity: 85% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 8:06 AM CDT

Temperature: 77.6 °F Dew Point: 73 °F Humidity: 87% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 8:06 AM CDT

Temperature: 78.3 °F Dew Point: 73 °F Humidity: 84% Wind: East at 2.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Melrose Woods, Wildwood, MO

Updated: 8:07 AM CDT

Temperature: 73.8 °F Dew Point: 72 °F Humidity: 94% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Twin Oaks, Twin Oaks, MO

Updated: 8:02 AM CDT

Temperature: 76.1 °F Dew Point: 72 °F Humidity: 86% Wind: Calm Pressure: 30.04 in Hourly Precipitation: - Heat Index: 77 °F Graphs

Location: Manchester, MO, Manchester, MO

Updated: 7:58 AM CDT

Temperature: 74.2 °F Dew Point: 72 °F Humidity: 92% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 8:05 AM CDT

Temperature: 77.6 °F Dew Point: 74 °F Humidity: 88% Wind: South at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Danielle Downs, St. Peters, MO

Updated: 8:07 AM CDT

Temperature: 80.6 °F Dew Point: 76 °F Humidity: 86% Wind: ENE at 1.6 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 8:06 AM CDT

Temperature: 73.9 °F Dew Point: 74 °F Humidity: 100% Wind: Calm Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 8:07 AM CDT

Temperature: 75.1 °F Dew Point: 73 °F Humidity: 94% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 8:04 AM CDT

Temperature: 77.0 °F Dew Point: 72 °F Humidity: 86% Wind: Calm Pressure: 30.00 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 8:02 AM CDT

Temperature: 77.2 °F Dew Point: 65 °F Humidity: 66% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 8:07 AM CDT

Temperature: 73.6 °F Dew Point: 70 °F Humidity: 89% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: De Smet Jesuit High School, Creve Coeur, MO

Updated: 7:54 AM CDT

Temperature: 76.4 °F Dew Point: 70 °F Humidity: 81% Wind: ENE at 2.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: MesoWest EURKA1 MO US UPR, Wildwood, MO

Updated: 7:10 AM CDT

Temperature: 73 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: The Boardwalk at WingHaven, OFallon, MO

Updated: 8:07 AM CDT

Temperature: 75.9 °F Dew Point: 72 °F Humidity: 88% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 8:07 AM CDT

Temperature: 78.6 °F Dew Point: 74 °F Humidity: 85% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 8:06 AM CDT

Temperature: 75.9 °F Dew Point: 72 °F Humidity: 85% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 8:06 AM CDT

Temperature: 73.2 °F Dew Point: 71 °F Humidity: 93% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: St. Peters, St. Peters, MO

Updated: 8:07 AM CDT

Temperature: 77.2 °F Dew Point: 72 °F Humidity: 83% Wind: SE at 8.1 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Big Bend and I-270, Kirkwood, MO

Updated: 8:05 AM CDT

Temperature: 77.2 °F Dew Point: 67 °F Humidity: 71% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Indian Ridge Farms, Defiance, MO

Updated: 8:01 AM CDT

Temperature: 74.9 °F Dew Point: 73 °F Humidity: 94% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 8:06 AM CDT

Temperature: 76.5 °F Dew Point: 71 °F Humidity: 84% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 8:07 AM CDT

Temperature: 76.3 °F Dew Point: 70 °F Humidity: 82% Wind: ESE at 1.1 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Twin Chimneys, O'Fallon, MO

Updated: 8:05 AM CDT

Temperature: 81.2 °F Dew Point: 74 °F Humidity: 78% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 8:01 AM CDT

Temperature: 76.8 °F Dew Point: 71 °F Humidity: 82% Wind: WNW at 2.7 mph Pressure: 29.90 in Hourly Precipitation: - Heat Index: 78 °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 
655 am CDT Wed Aug 27 2014 


Synopsis: 
issued at 237 am CDT Wed Aug 27 2014 


Front is slowly making progress into the County Warning Area early this morning 
and is currently stretching from near Kansas City, Missouri to 
Quincy, Illinois. Some isolated thunderstorms continue to pop up 
here and there on outflow boundaries across eastern Missouri and 
west central Illinois, with a better defined cluster of convection 
now taking shape across far northwest Missouri. Temperatures 
remain mild with all locations still in the 70s this morning. 


Cvking 
&& 


Short term: (through tonight) 
issued at 237 am CDT Wed Aug 27 2014 


Elevated convection will continue to develop across northern 
Missouri early this morning with scattered thunderstorms forecast 
through the lunch hour across the northern counties of the County Warning Area. 


Front will make very slow progress south today. Temperatures will 
quickly rise into the 90s south of the front and due to pooled 
dewpoints in the lower to middle 70s, produce at least a few hours 
of heat indices above 100 degrees along and south of I-70. Although 
it won't be as hot as the past few days - feel current heat 
headlines are warranted given potential for one more day of heat 
indices reaching 105 degrees this afternoon. 


The front will also serve as the focus for convective initiation 
with scattered thunderstorms expected along and south of I-70 this 
afternoon. As was the case yesterday, a few of the storms could 
produce some gusty winds to 50 mph and torrential downpours. 


Diurnal convection expected to dissipate quickly after sunset with 
the focus for more elevated development shifting back north of the 
boundary across the northern reaches of the County Warning Area after midnight. 


Cvking 


Long term: (thursday through tuesday) 
issued at 237 am CDT Wed Aug 27 2014 


Boundary will be slow to lift back north on Thursday and may become 
orientated more northwest to southeast across the County Warning Area...paralleling 
the Mississippi River. Once again, afternoon convection will be 
possible in the vicinity of this front. 


The boundary should finally lift north as a warm front Thursday 
night with dry and seasonably warm weather expected on Friday 
ahead of the shortwave/cold front that approaches from the west. 


Have tried to focus likely pops Friday night and Saturday with this 
next system as blended guidance seems to give too long of a period 
of pops when compared to reality. So, after a wet and cooler 
beginning to the Labor Day weekend, it appears chances of 
precipitation will decrease for Sunday and Monday (labor day), with 
temperatures beginning to inch back up above normal in the wake 
of this storm system. 


Cvking 
&& 


Aviation: (for the 12z tafs through 12z Thursday morning) 
issued at 655 am CDT Wed Aug 27 2014 


Complex of storms continues to develop over northwestern Missouri 
and track to the east. Should move into KUIN by 17z and persist 
through the afternoon hours. Otherwise, trying to pin down when 
storms may develop and move through other tafs sites is difficult, 
so for now kept tafs dry. Light winds to pickup from the northeast 
to east today as frontal boundary settles over region. Some patchy 
dense fog has developed over central MO, but should lift and 
dissipate by mid morning today. By tonight, front will be just 
south of Interstate 70, so could see some patchy MVFR fog develop 
after 06z Thursday, so added tempo mention. 


Specifics for kstl: 


Complex of storms continues to develop over northwestern Missouri 
and track to the east. Should move remain north of Metro area. 
Otherwise, trying to pin down when storms may develop and move 
through Metro area is difficult, so for now kept taf dry. Light 
winds to pickup from the northeast to east by 18z as frontal 
boundary settles over region. By tonight, front will be just 
south of Interstate 70, so could see some patchy MVFR fog develop 
after 08z Thursday, so added tempo mention. 


Byrd 
&& 


Lsx watches/warnings/advisories: 
MO...heat advisory until 8 PM CDT this evening for Audrain MO-Boone 
MO-Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO- 
Iron MO-Madison MO-Moniteau MO-Montgomery MO-Osage MO- 
Reynolds MO-St. Francois MO-Ste. Genevieve MO-Warren MO- 
Washington MO. 


Excessive heat warning until 8 PM CDT this evening for Jefferson 
MO-Lincoln MO-St. Charles MO-St. Louis city MO-St. Louis MO. 


Illinois...excessive heat warning until 8 PM CDT this evening for Bond Illinois- 
Calhoun Illinois-Clinton Illinois-Fayette Illinois-Greene Illinois-Jersey Illinois- 
Macoupin Illinois-Madison Illinois-Marion Illinois-Monroe Illinois-Montgomery Illinois- 
Randolph IL-St. Clair Illinois-Washington Illinois. 


&& 


$$ 
Weather forecast office lsx 



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