Chesterfield, Missouri Weather Conditions

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Current Conditions

  • 32°
  • Overcast
  • Wind: SE 6 mph
  • Humidity: 64%
  • Visibility: 10.0 miles
  • Dew Point: 21°
  • Pressure: 30.11 in. 0
  • Heat Index: 26

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Next 12 Hours

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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of Rain
  • High: 52 °
  • Low: 21 °
  • Chance of Rain
  • Wednesday
  • Overcast
  • High: 24 °
  • Low: 8 °
  • Overcast
  • Thursday
  • Clear
  • High: 29 °
  • Low: 14 °
  • Clear
  • Friday
  • Clear
  • High: 47 °
  • Low: 27 °
  • Clear
  • Saturday
  • Clear
  • High: 54 °
  • Low: 28 °
  • Clear

Forecast for Chesterfield, Missouri

Updated: 1:17 AM CST on January 03, 2015

Winter Weather Advisory in effect until 8 am CST Tuesday...
  • Tomorrow

    Light rain early...then remaining cloudy with showers in the afternoon. High 11C. Winds SW at 15 to 25 km/h. Chance of rain 40%.

  • Tomorrow

    Showers in the evening, then cloudy overnight. Low -6C. Winds NNW at 25 to 40 km/h. Chance of rain 40%.

  • Wednesday

    Overcast. High -4C. Winds N at 15 to 30 km/h.

  • Wednesday

    Cloudy skies early, then partly cloudy after midnight. A few flurries are possible. Low -13C. Winds N at 15 to 25 km/h.

  • Thursday

    Sunny skies. High -1C. Winds NNW at 15 to 25 km/h.

  • Thursday

    Clear skies. Low around -10C. Winds light and variable.

  • Friday

    Mainly sunny. High 8C. Winds SSW at 15 to 25 km/h.

  • Friday

    Some clouds early will give way to generally clear conditions overnight. Low -3C. Winds SW at 10 to 15 km/h.

  • Saturday

    Sunny. High 12C. Winds WNW at 10 to 15 km/h.

  • Saturday

    Mostly clear. Low -2C. Winds NE at 10 to 15 km/h.

  • Sunday

    Sunny. High 11C. Winds SSW at 10 to 15 km/h.

  • Sunday

    A mostly clear sky. Low near 0C. Winds WSW at 10 to 15 km/h.

  • Monday

    Sunny. High 13C. Winds W at 10 to 15 km/h.

  • Monday

    Clear skies. Low -1C. Winds light and variable.

  • Tuesday

    A mainly sunny sky. High 16C. Winds SSW at 10 to 15 km/h.

  • Tuesday

    Clear skies. Low around 0C. Winds light and variable.

  • Wednesday

    Sunny. High 17C. Winds SE at 10 to 15 km/h.

  • Wednesday

    Clear skies. Low 1C. Winds ESE at 10 to 15 km/h.

  • Thursday

    Sunny skies. High 16C. Winds ESE at 10 to 15 km/h.

  • Thursday

    A few clouds from time to time. Low 3C. Winds ESE at 10 to 15 km/h.

  • Friday

    A few showers early with mostly cloudy conditions later in the day. High around 15C. Winds SE at 15 to 25 km/h. Chance of rain 30%.

  • Friday

    Cloudy with occasional rain showers. Low near 5C. Winds SE at 10 to 15 km/h. Chance of rain 50%.

Severe Weather Alert Descriptions

 Winter Weather Advisory  Statement as of 3:58 PM CST on March 2, 2015


... Winter Weather Advisory in effect from midnight tonight to
8 am CST Tuesday...

The National Weather Service in St Louis has issued a Winter
Weather Advisory for freezing rain and sleet... which is in effect
from midnight tonight to 8 am CST Tuesday.

* Timing... freezing rain is expected to develop over northeast and
east central Missouri... as well as west central and southwest
Illinois... late tonight and continue into early Tuesday morning.
Some light snow is also possible in northeast Missouri and west
central Illinois.

* Accumulations... a light glazing of ice.

* Winds... southeast 10 to 15 mph with gusts up to 20 mph.

* Impacts... the wintry precipitation will result in hazardous
travel conditions... especially on bridges... overpasses... and
untreated roads. The cold ground may cause some icing problems
to continue even as air temperatures reach the freezing mark.

Precautionary/preparedness actions...

A Winter Weather Advisory is issued for a variety of winter
weather conditions... such as snow... blowing snow... sleet... or
freezing drizzle and rain. It only takes a small amount of wintry
precipitation to make roads... bridges... sidewalks... and parking
lots icy and dangerous. It is often difficult to tell when ice
begins to form... so do not be caught off guard.





 Special Statement  Statement as of 4:13 PM CST on March 2, 2015


... Another round of accumulating snow possible on Wednesday...

The latest forecast guidance suggests another round of snowfall
for the area on Wednesday. Early indications are that the northern
edge of the accumulating snowfall will be near the Interstate 70
corridor... with the heaviest accumulations occurring across
southeast Missouri and southern Illinois.

Its still too early to determine exact snowfalls with this storm
system... and a minor change in the location of the storm will
have a large impact on the snowfall any one location recieves.
However... there is a potential for 4 or more inches of snow south
of a Salem Missouri... Ste Genevieve line... with lesser
accumulations to the north.

This will be a potent winter weather maker for parts of southeast
Missouri and southern Illinois... and points south. Those planning
travel into these areas on Tuesday night... Wednesday... or
Wednesday night should carefullly monitor the latest forecast
information.



413 PM CST Mon Mar 2 2015

... Another round of accumulating snow possible on Wednesday...

The latest forecast guidance suggests another round of snowfall
for the area on Wednesday. Early indications are that the northern
edge of the accumulating snowfall will be near the Interstate 70
corridor... with the heaviest accumulations occurring across
southeast Missouri and southern Illinois.

Its still too early to determine exact snowfalls with this storm
system... and a minor change in the location of the storm will
have a large impact on the snowfall any one location recieves.
However... there is a potential for 4 or more inches of snow south
of a Salem Missouri... Ste Genevieve line... with lesser
accumulations to the north.

This will be a potent winter weather maker for parts of southeast
Missouri and southern Illinois... and points south. Those planning
travel into these areas on Tuesday night... Wednesday... or
Wednesday night should carefullly monitor the latest forecast
information.


413 PM CST Mon Mar 2 2015

... Another round of accumulating snow possible on Wednesday...

The latest forecast guidance suggests another round of snowfall
for the area on Wednesday. Early indications are that the northern
edge of the accumulating snowfall will be near the Interstate 70
corridor... with the heaviest accumulations occurring across
southeast Missouri and southern Illinois.

Its still too early to determine exact snowfalls with this storm
system... and a minor change in the location of the storm will
have a large impact on the snowfall any one location recieves.
However... there is a potential for 4 or more inches of snow south
of a Salem Missouri... Ste Genevieve line... with lesser
accumulations to the north.

This will be a potent winter weather maker for parts of southeast
Missouri and southern Illinois... and points south. Those planning
travel into these areas on Tuesday night... Wednesday... or
Wednesday night should carefullly monitor the latest forecast
information.




Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Shadowridge, Ballwin, MO

Updated: 2:49 AM CST

Temperature: 32.0 °F Dew Point: 24 °F Humidity: 72% Wind: SE at 1.0 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Winding Trails, Ballwin, MO

Updated: 2:43 AM CST

Temperature: 32.6 °F Dew Point: 26 °F Humidity: 76% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Oakwood Farms, Ballwin, MO

Updated: 2:49 AM CST

Temperature: 31.3 °F Dew Point: 25 °F Humidity: 76% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 2:40 AM CST

Temperature: 32.5 °F Dew Point: 25 °F Humidity: 75% Wind: WSW at 4.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Westglen Village, Ballwin, MO

Updated: 2:49 AM CST

Temperature: 31.5 °F Dew Point: 25 °F Humidity: 77% Wind: South at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Kiefernring, Ballwin, MO

Updated: 2:46 AM CST

Temperature: 31.6 °F Dew Point: 24 °F Humidity: 74% Wind: North at - Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Glan Tai Estates, Ballwin, MO

Updated: 2:49 AM CST

Temperature: 32.4 °F Dew Point: 20 °F Humidity: 60% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: C. Verripslaantje, Saint Charles, MO

Updated: 2:46 AM CST

Temperature: 31.1 °F Dew Point: 26 °F Humidity: 82% Wind: North at - Pressure: 29.94 in Hourly Precipitation: - Windchill: 31 °F Graphs

Location: Arbor Valley, Ballwin, MO

Updated: 2:49 AM CST

Temperature: 32.0 °F Dew Point: 25 °F Humidity: 75% Wind: SE at 1.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 2:49 AM CST

Temperature: 32.2 °F Dew Point: 21 °F Humidity: 63% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 2:47 AM CST

Temperature: 29.9 °F Dew Point: 23 °F Humidity: 74% Wind: SSE at 4.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 2:38 AM CST

Temperature: 33.2 °F Dew Point: 25 °F Humidity: 73% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Melrose Woods, Wildwood, MO

Updated: 2:49 AM CST

Temperature: 32.5 °F Dew Point: 26 °F Humidity: 75% Wind: SE at 3.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Twin Oaks, Twin Oaks, MO

Updated: 2:37 AM CST

Temperature: 31.5 °F Dew Point: 23 °F Humidity: 71% Wind: ESE at 2.2 mph Pressure: 29.92 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: APRSWXNET Wildwood MO US, Eureka, MO

Updated: 2:17 AM CST

Temperature: 32 °F Dew Point: 25 °F Humidity: 74% Wind: ESE at 6 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Manchester, MO, Manchester, MO

Updated: 2:48 AM CST

Temperature: 31.7 °F Dew Point: 25 °F Humidity: 76% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: CommuniTree Gardens Nursery, St. Louis, MO

Updated: 2:43 AM CST

Temperature: 32.7 °F Dew Point: 25 °F Humidity: 72% Wind: Calm Pressure: 29.52 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Windwood,Nic S., St. Peters, MO

Updated: 2:42 AM CST

Temperature: 32.2 °F Dew Point: 24 °F Humidity: 72% Wind: South at 1.7 mph Pressure: 29.76 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: McClay Trails, Saint Charles, MO

Updated: 2:45 AM CST

Temperature: 32.0 °F Dew Point: 24 °F Humidity: 71% Wind: ESE at 2.7 mph Pressure: 29.80 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 2:49 AM CST

Temperature: 32.4 °F Dew Point: 25 °F Humidity: 75% Wind: South at 2.7 mph Pressure: 29.49 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 2:49 AM CST

Temperature: 33.1 °F Dew Point: 25 °F Humidity: 71% Wind: ESE at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 2:41 AM CST

Temperature: 32.2 °F Dew Point: 25 °F Humidity: 75% Wind: Calm Pressure: 29.93 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: Honeygrove Court, Saint Louis, MO

Updated: 2:46 AM CST

Temperature: 33.1 °F Dew Point: 23 °F Humidity: 67% Wind: North at - Pressure: 30.04 in Hourly Precipitation: - Windchill: 33 °F Graphs

Location: Park Charles South, Saint Peters, MO

Updated: 2:46 AM CST

Temperature: 32.0 °F Dew Point: 23 °F Humidity: 74% Wind: North at - Pressure: 30.10 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 2:46 AM CST

Temperature: 32.4 °F Dew Point: 15 °F Humidity: 49% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 2:49 AM CST

Temperature: 31.6 °F Dew Point: 23 °F Humidity: 69% Wind: SSW at 2.3 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Ballas Courts, Saint Louis, MO

Updated: 2:49 AM CST

Temperature: 32.5 °F Dew Point: 21 °F Humidity: 62% Wind: SW at 3.6 mph Pressure: 29.53 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Creve Coeur, Saint Louis, MO

Updated: 2:49 AM CST

Temperature: 32.4 °F Dew Point: 20 °F Humidity: 61% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: MesoWest EURKA1 MO US UPR, Wildwood, MO

Updated: 1:10 AM CST

Temperature: 27 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: Saint Peters Hills, Saint Peters, MO

Updated: 2:49 AM CST

Temperature: 33.1 °F Dew Point: 20 °F Humidity: 58% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Country Crossing - Birdie Hills and Treeshadow, St. Peters, MO

Updated: 2:38 AM CST

Temperature: 32.5 °F Dew Point: 24 °F Humidity: 71% Wind: SSE at 5.8 mph Pressure: 29.89 in Hourly Precipitation: - Windchill: 27 °F Graphs

Location: Hunters Valley, Saint Peters, MO

Updated: 2:45 AM CST

Temperature: 32.4 °F Dew Point: 23 °F Humidity: 69% Wind: ESE at 1.7 mph Pressure: 30.03 in Hourly Precipitation: - Windchill: 32 °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 
1204 am CST Tue Mar 3 2015 


Update: 
issued at 916 PM CST Mon Mar 2 2015 


No major changes to going forecast tonight. Did delay onset of 
higher pops but still expect at least some scattered development 
within the next several hours so left likely pops going for late 
tonight. Temperatures are on track indicating precipitation for 
the eastern and northern half of the area will most likely at 
least initially be freezing rain. Sleet still appears possible 
across the far north due to cooler temps aloft. 


Gosselin 


&& 


Short term: (through late tonight) 
issued at 350 PM CST Mon Mar 2 2015 


Interesting forecast for tonight, as return flow develops in the 
wake of the retreating surface ridge. Resultant warm air advection/lift and 
moisture return should mean precipitation threat ramping up as the 
evening progresses, generally right over the County Warning Area and in the 
residually cold and relatively dry low level air mass. Soundings over 
the northeast half of the County Warning Area have a produced warm wedge aloft (as 
much as +5c around 850mb) with low levels remaining below freezing. 
With the above in mind, the key to the forecast is how rapidly 
surface temperatures will rebound after a brief bit of cooling this 
evening. Low level warm advection should also be attempting to push 
surface temps above freezing with time, but think that this will be 
a rather slow process with the existing snow cover and believe that 
the evaporative cooling that occurs once the precip starts may 
temporarily retard the slow northward push of the warmer air. In our 
far north, evaporative cooling processes are likely to cause a bit 
of sleet and perhaps even some snow to occur along with the freezing 
rain. 


Although quantitative precipitation forecast will be quite light, am concerned about the below 
freezing surface temps and the cold ground causing icing conditions 
on untreated pavement. Based on this reasoning, have opted to issue 
a Winter Weather Advisory for about the northeast half of the County Warning Area 
(along and north of a Mexico-St Louis-Salem Illinois line), where the 
coldest surface temps and slightly higher quantitative precipitation forecast will be co-located. 
Uncertain as to exactly when the precip will start, but think the 
"heaviest" will likely be during the overnight hours so will begin 
the advisory at 06z. Will run it long enough to the morning rush 
hour...14z Tuesday. 


Obviously, additions and/or deletions to the advisory area may be 
needed as precip and temp trends become a bit more clear. 


Truett 


Long term: (tuesday through next monday) 
issued at 350 PM CST Mon Mar 2 2015 


(tuesday-thursday) 


Once the freezing rain threat ends early, primary forecast concern 
on Tuesday is pop trends, as warm advection continues lift and 
moisture transport into the mid-Mississippi Valley. Hard to get a 
handle on exact precip trends as lift is rather broad and somewhat 
unfocused, but there does seem to be some model consensus that 
highest pops will become focused over the southeast half of the County Warning Area 
heading into the afternoon and early evening, with the strongest 
moisture advection and lift along and ahead of approaching cold 
front. Instability looks even more meager than before, so have 
removed thunder from forecast. 


Winter weather concerns return to the forecast Tuesday night and 
Wednesday as next round of cold Canadian air undercuts energetic 
southwest flow aloft. The rain over the southeast half of the County Warning Area 
will gradually change over to snow across the southeast half of the 
County Warning Area as the low level cloud air deepens, and by Wednesday morning 
thermal profiles support all snow across the County Warning Area. 


All of the synoptic guidance suggests a potent shortwave ejecting 
out of the longwave trof over the southern rockes and pushing into 
the Southern Plains during the day on Wednesday. Resultant warm air advection over 
the top of the deepening cold air to our south is expected to 
produce a band of heavy precip from Arkansas into the lower Ohio River 
valley. Southern sections of our County Warning Area will be on the northern 
fringes of this heavier precip. The last 2 days the NAM has been 
the northern outlier with this band of precip and this trend 
continued with the 12z run...so have continued to trend forecast to 
the more southward solutions of the GFS, Gem and European model (ecmwf). 


Early indications are that snow accumulations of 4-6 inches will be 
possible in our far southern areas, but a very slight shift in the 
track of the system is going to have a huge impact on exact 
amounts. Coordinated the potential for a Winter Storm Watch, but 
since the system is still 2 days away opted to wait another forecast 
cycle to see if we can get a better handle on the northern fringes 
of the system. However, snow potential will be highlighted in the 
severe weather potential statement and an Special Weather Statement. 


Current timing of shortwave is such that precip should wind down 
rapidly on Wednesday evening across the south. Secondary surge of 
colder air in the wake of the shortwave should mean clear, dry and 
cold weather heading into Thursday. 


(Friday through monday) 


Surface ridge to move to the south allowing southerly winds to 
return to the region Thursday night. After a cold start Friday 
morning in the single digits to upper teens, temperatures to 
moderate through the extended with highs in the mid 30s to mid 40s 
Friday, rising into the 40s and 50s for the rest of the weekend and 
into early next week. Dry conditions to prevail through the period. 


Truett/Byrd 


&& 


Aviation: (for the 06z tafs through 06z Tuesday night) 
issued at 1149 PM CST Mon Mar 2 2015 


Specifics for kcou, kuin: light freezing rain was spreading 
northeastward across the region ahead of a lifting warm front. As 
temperatures rise late overnight and towards morning, the freezing 
rain will transition over to rain. The onset of MVFR and IFR 
ceilings has been a bit slower than previously anticipated. 
Initially southeasterly to southerly winds will become 
southwesterly during the day, then turn sharply northwesterly 
after a cold front moves through the area towards the end of the 
valid taf period. 


Specifics for kstl, ksus, kcps: light freezing rain was spreading 
northeastward across the region ahead of a lifting warm front at 
taf issuance. As temperatures rise late overnight and towards 
morning, the freezing rain will transition over to rain. Although 
the onset of MVFR and IFR cigs has been a bit slower than 
previously anticipated, upstream metars do show lower cigs 
occurring with and behind the precip. Initially southeasterly to 
southerly winds will become southwesterly during the day, then 
turn sharply northwesterly after a cold front moves through the 
area on Tuesday night. 


Kanofsky 


&& 


Lsx watches/warnings/advisories: 
MO...Winter Weather Advisory until 8 am CST Tuesday for Audrain MO- 
Knox MO-Lewis MO-Lincoln MO-Marion MO-Monroe MO-Montgomery 
MO-Pike MO-Ralls MO-Shelby MO-St. Charles MO-St. Louis city 
MO-St. Louis MO-Warren MO. 


Illinois...Winter Weather Advisory until 8 am CST Tuesday for Adams Illinois-Bond 
Illinois-Brown Illinois-Calhoun Illinois-Clinton Illinois-Fayette Illinois-Greene Illinois- 
Jersey Illinois-Macoupin Illinois-Madison Illinois-Marion Illinois-Montgomery Illinois- 
Pike IL-St. Clair Illinois. 


&& 


$$ 


Weather forecast office lsx 












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