Ballwin, Missouri Weather Conditions

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Current Conditions

  • 83°
  • Clear
  • Wind: West 6 mph
  • Humidity: 54%
  • Visibility: 10.0 miles
  • Dew Point: 65°
  • Pressure: 29.86 in. -
  • Heat Index: 85

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Next 12 Hours

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7  pm
10  pm
1  am
4  am
Chance of a Thunderstorm
Chance of T-storms
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Thunderstorm
  • High: 88 °
  • Low: 72 °
  • T-Storms
  • Tuesday
  • Chance of a Thunderstorm
  • High: 86 °
  • Low: 66 °
  • Chance of T-Storms
  • Wednesday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 72 °
  • Chance of T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 95 °
  • Low: 72 °
  • Chance of T-Storms
  • Friday
  • Partly Cloudy
  • High: 93 °
  • Low: 64 °
  • Partly Cloudy

Forecast for Ballwin, Missouri

Updated: 4:00 PM CDT on September 01, 2014

Flash Flood Watch in effect from 7 PM CDT this evening through Tuesday morning...
  • Monday

    Overcast with thunderstorms, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 88F. Winds from the SW at 10 to 15 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Monday Night

    Overcast with thunderstorms and rain showers. Low of 72F. Winds from the SW at 5 to 10 mph. Chance of rain 90% with rainfall amounts near 1.4 in. possible.

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 86F with a heat index of 91F. Winds from the WNW at 5 to 10 mph. Chance of rain 30%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 66F. Winds less than 5 mph. Chance of rain 20%.

  • Wednesday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 88F with a heat index of 95F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm and rain after midnight. Low of 72F. Winds from the South at 5 to 10 mph. Chance of rain 40%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm and rain in the afternoon. High of 95F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.

  • Thursday Night

    Overcast in the evening, then partly cloudy. Low of 72F. Winds from the SSW at 5 to 10 mph.

  • Friday

    Clear in the morning, then partly cloudy. High of 93F with a heat index of 99F. Winds from the SW at 5 to 10 mph.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 64F. Winds from the SW at 5 to 10 mph shifting to the WNW after midnight. Chance of rain 60%.

  • Saturday

    Mostly cloudy with a chance of a thunderstorm. High of 72F. Winds from the North at 5 to 10 mph. Chance of rain 40%.

  • Saturday Night

    Partly cloudy. Low of 59F. Winds from the NNE at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 77F. Winds from the ENE at 5 to 10 mph.

  • Sunday Night

    Partly cloudy. Low of 63F. Winds from the East at 5 to 10 mph.

  • Monday

    Mostly cloudy. High of 82F. Winds from the ESE at 5 to 10 mph.

  • Monday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 63F. Winds from the SE at 5 to 10 mph. Chance of rain 30%.

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm. High of 93F. Winds from the South at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy. Fog overnight. Low of 66F. Winds from the South at 5 to 10 mph.

  • Wednesday

    Clear. High of 91F. Winds from the SSW at 5 to 10 mph.

  • Wednesday Night

    Clear. Fog overnight. Low of 64F. Winds less than 5 mph.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 90F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

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

  • Friday

    Clear with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 20%.

  • Friday Night

    Clear. Low of 63F. Winds less than 5 mph.

Severe Weather Alert Descriptions

 Flash Flood Watch  Statement as of 3:24 PM CDT on September 1, 2014


... Flash Flood Watch in effect from 7 PM CDT this evening through
Tuesday morning...

The National Weather Service in St Louis has issued a

* Flash Flood Watch for portions of Illinois and Missouri...
including the following counties... in Illinois... Bond IL...
Clinton IL... Fayette IL... Madison IL... Marion IL... Monroe
IL... Montgomery IL... Randolph IL... St. Clair IL and
Washington IL. In Missouri... Cole MO... Crawford MO... Franklin
MO... Gasconade MO... Iron MO... Jefferson MO... Madison MO...
Moniteau MO... Osage MO... Reynolds MO... St. Charles MO... St.
Francois MO... St. Louis city MO... St. Louis MO... Ste.
Genevieve MO... Warren MO and Washington MO.

* From 7 PM CDT this evening through Tuesday morning

* thunderstorms producing heavy rainfall are expected to train
over the area tonight. Widespread rainfall amounts between 1.5
and 2 inches are expected with locally higher amounts. Areas
along and south of the Interstate 44 corridor in Missouri... and
along and south of the Interstate 70 corridor in Illinois are
expected to get the heaviest amounts of rain tonight.

* Heavy rainfall will result in flooding of low lying or poor
drainage areas... and ultimately dangerous flash flooding on
smaller creeks and streams. Significant rises on larger
streams and rivers will also be possible.

Precautionary/preparedness actions...

A Flash Flood Watch means that flash flooding is possible but not
imminent in the watch area. People in the watch area should be
aware of the possibility of heavy rainfall and flash flooding.
Check your preparedness requirements... especially if you live in
flood prone areas. Stay informed... and be ready for quick action
if flooding is observed or if a Flash Flood Warning is issued.





Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Oakwood Farms, Ballwin, MO

Updated: 3:57 PM CDT

Temperature: 82.3 °F Dew Point: 69 °F Humidity: 64% Wind: Calm Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Westglen Village, Ballwin, MO

Updated: 3:57 PM CDT

Temperature: 84.1 °F Dew Point: 71 °F Humidity: 65% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Arbor Valley, Ballwin, MO

Updated: 3:56 PM CDT

Temperature: 85.7 °F Dew Point: 69 °F Humidity: 57% Wind: SE at 4.0 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Winding Trails, Ballwin, MO

Updated: 3:53 PM CDT

Temperature: 81.9 °F Dew Point: 70 °F Humidity: 67% Wind: WSW at 1.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Twin Oaks, Twin Oaks, MO

Updated: 3:51 PM CDT

Temperature: 84.7 °F Dew Point: 68 °F Humidity: 58% Wind: Calm Pressure: 29.84 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Manchester, MO, Manchester, MO

Updated: 3:44 PM CDT

Temperature: 82.0 °F Dew Point: 69 °F Humidity: 65% Wind: NNE at 1.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 3:56 PM CDT

Temperature: 86.8 °F Dew Point: 70 °F Humidity: 58% Wind: SW at 5.0 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 3:57 PM CDT

Temperature: 89.2 °F Dew Point: 73 °F Humidity: 59% Wind: SSW at 1.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

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

Updated: 3:55 PM CDT

Temperature: 85.9 °F Dew Point: 69 °F Humidity: 58% Wind: NNW at 1.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

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

Updated: 3:50 PM CDT

Temperature: 83.5 °F Dew Point: 67 °F Humidity: 58% Wind: WSW at 6.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 3:57 PM CDT

Temperature: 85.0 °F Dew Point: 68 °F Humidity: 57% Wind: East at 1.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 3:56 PM CDT

Temperature: 84.5 °F Dew Point: 69 °F Humidity: 60% Wind: SW at 4.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 3:57 PM CDT

Temperature: 86.9 °F Dew Point: 71 °F Humidity: 59% Wind: NW at 2.5 mph Pressure: 29.47 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Crest Ave. Kirkwood MO, St. Louis, MO

Updated: 3:47 PM CDT

Temperature: 90.3 °F Dew Point: 70 °F Humidity: 52% Wind: WSW at 1.1 mph Pressure: 29.86 in Hourly Precipitation: - Heat Index: 96 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 3:57 PM CDT

Temperature: 82.6 °F Dew Point: 67 °F Humidity: 59% Wind: South at 1.3 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Creve Coeur Park - Forest ReLeaf, St. Louis, MO

Updated: 3:53 PM CDT

Temperature: 86.4 °F Dew Point: 68 °F Humidity: 55% Wind: West at 2.0 mph Pressure: 29.40 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 3:45 PM CDT

Temperature: 86.2 °F Dew Point: 69 °F Humidity: 56% Wind: ENE at 4.2 mph Pressure: 29.70 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: San Luis Trails, Fenton, MO

Updated: 3:57 PM CDT

Temperature: 83.6 °F Dew Point: 65 °F Humidity: 53% Wind: SW at 2.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: MesoWest EURKA1 MO US UPR, Wildwood, MO

Updated: 2:00 PM CDT

Temperature: 81 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Sunset Hills, St Louis, MO

Updated: 3:55 PM CDT

Temperature: 83.9 °F Dew Point: 69 °F Humidity: 62% Wind: Calm Pressure: 29.86 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Melrose Woods, Wildwood, MO

Updated: 3:57 PM CDT

Temperature: 87.7 °F Dew Point: 74 °F Humidity: 65% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 1:36 PM CDT

Temperature: 80.6 °F Dew Point: 68 °F Humidity: 65% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 3:56 PM CDT

Temperature: 85.9 °F Dew Point: 70 °F Humidity: 60% Wind: South at 3.0 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: East Madison, Kirkwood, MO, Kirkwood, MO

Updated: 3:57 PM CDT

Temperature: 83.8 °F Dew Point: 68 °F Humidity: 58% Wind: SE at 2.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 3:57 PM CDT

Temperature: 83.5 °F Dew Point: 69 °F Humidity: 61% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 3:48 PM CDT

Temperature: 86.0 °F Dew Point: 71 °F Humidity: 61% Wind: SSW at 1.0 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Maryland Heights, MO

Updated: 3:56 PM CDT

Temperature: 83.2 °F Dew Point: 69 °F Humidity: 63% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 3:57 PM CDT

Temperature: 86.7 °F Dew Point: 67 °F Humidity: 52% Wind: West at 8.3 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Danielle Downs, St. Peters, MO

Updated: 3:57 PM CDT

Temperature: 92.7 °F Dew Point: 70 °F Humidity: 49% Wind: South at 3.8 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 99 °F Graphs

Location: High Ridge Fire District House #1, High Ridge, MO

Updated: 3:44 PM CDT

Temperature: 83.6 °F Dew Point: 68 °F Humidity: 60% Wind: WSW at 4.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Maryland Heights, St Louis, MO

Updated: 3:45 PM CDT

Temperature: 85.5 °F Dew Point: 66 °F Humidity: 53% Wind: West at 12.0 mph Pressure: 29.21 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 3:47 PM CDT

Temperature: 84.2 °F Dew Point: 56 °F Humidity: 38% Wind: WSW at 1.0 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Crestwood, Crestwood, MO

Updated: 3:48 PM CDT

Temperature: 85.6 °F Dew Point: 68 °F Humidity: 55% Wind: WSW at 2.7 mph Pressure: 29.60 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: Pacific, Pacific, MO

Updated: 3:40 PM CDT

Temperature: 95.9 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: - Heat Index: - Graphs

Location: Parkridge, Brentwood, MO

Updated: 3:57 PM CDT

Temperature: 84.2 °F Dew Point: - Humidity: - Wind: South at 2.2 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 3:55 PM CDT

Temperature: 83.1 °F Dew Point: 60 °F Humidity: 46% Wind: South at 5.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 3:46 PM CDT

Temperature: 88.9 °F Dew Point: 70 °F Humidity: 53% Wind: East at 4.7 mph Pressure: 29.79 in Hourly Precipitation: - Heat Index: 94 °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 
341 PM CDT Mon Sep 1 2014 


Short term: (through late tonight) 
issued at 310 PM CDT Mon Sep 1 2014 


Heavy rain threat is the primary forecast challenge for tonight. 
Another shortwave is moving east-southeast through the longwave 
pattern over the Great Plains. This shortwave will trigger a 
south-southwesterly low level jet to increase again this evening, 
aimed right at the low level baroclinic zone left over from last 
night's storms. With plenty of moisture in place over the area and 
a baroclinic zone that's parallel or nearly parallel to the mid 
level flow, expect that thunderstorms will form and train over parts 
of Missouri and Illinois this evening and tonight. All short range 
guidance shows a tremendous amount of moisture convergence on the 
nose of the low level jet tonight...generally along and south of the 
I-70 corridor. Think the axis of heaviest rain will actually be 
along and south of the I-44 corridor in Missouri and along and south 
of I-70 in Illinois, but I cannot rule out heavy rain a little 
further north either. Quantitative precipitation forecast forecast paints a swath of heavy rain 
along this axis between 1.5 and 2 inches. With the potential for 
locally higher amounts, and flash flood guidance running around 
2-2.5 inches per hour, will go ahead and issue a Flash Flood Watch 
for those areas. Further north across northeast Missouri and west 
central Illinois, there could be some widely scattered/isolated 
showers and thunderstorms, but I don't think these will train and 
cause any flooding issues. 


Carney 


Long term: (tuesday through next monday) 
issued at 340 PM CDT Mon Sep 1 2014 


(tuesday - wednesday) 


Flat zonal upper flow will remain in the wake of the strong 
shortwave expected to pull away by Tuesday morning, with the hot 
upper ridge that had given US our period of well above average temps 
lurking just to the south. The synoptic cold front will probably 
linger into the stl Metro area at the start of Tuesday, but its 
associated precipitation likely well out ahead of it by this time 
into southern MO and far southern Illinois. Any slowing down of the 
eastward progress of the shortwave though will favor some 
precipitation of some sort extending back close to the stl Metro 
area. 


The upper level pattern at this point is not very favorable for much 
more southward progress of the front and so this boundary is 
expected to stall somewhere in the southern County Warning Area Tuesday and into 
Tuesday night. The old frontal boundary will probably lose a lot of 
its moisture convergence strength Tuesday afternoon and evening and 
so only isolated convection is expected in the absence of a low 
level jet or upper level support. The low level jet that will help 
refire up a more organized system later on Tuesday night will 
probably begin well to the west of our region and not really reach 
our area until Wednesday if it holds. 


It is for this reason that Wednesday pops were tempered until we see 
a clearer signal for how this will evolve and develop. 


Above average temps expected thru this period but not hot enough to 
warrant any sort of heat headline. 


(Thursday - friday) 


Well above average temps are currently anticipated during this 
stretch, with Max temps in the lo-mid 90s. Peak heat index values 
are looking to be from 100-105 for many areas on Thursday and, 
depending on whether or not thunderstorms can get going along 
approaching cold front, may very well see these values again 
on Friday. 


Fortunately, it is now September and so these shots of heat should 
be relatively short-lived...with it all expected to come to an end 
once the front moves thru Friday night. Boosted pops to just below 
likely for Friday night. 


(Saturday - next monday) 


A well deserved cool period still in the offing in the wake of this 
front with a 1025mb high pressure to be the dominant influence 
during this period. Max temps may struggle to exit the 70s in many 
areas. 


Tes 


&& 


Aviation: (for the 18z tafs through 18z Tuesday afternoon) 
issued at 1238 PM CDT Mon Sep 1 2014 


Expect VFR flight conditions to prevail through much of the 
afternoon. Scattered light showers will continue through the early 
afternoon across parts of southeast Missouri. West to southwest 
wind will gust to around 24kts. Expecting thunderstorms to 
redevelop somewhere over west central or southwest Missouri later 
this afternoon and spread northeast into parts of central and 
eastern Missouri and southwest Illinois this evening. Storms will 
likely train along and south of the I-70/I-44 corridor tonight 
producing IFR conditions in heavy rain. Storms should move south 
and begin to dissipate between 08-12z. 


Specifics for kstl: 


VFR flight conditions are expected to prevail this afternoon at 
Lambert. Latest thoughts are that thunderstorms will develop over 
southwest/west central Missouri and spread east-northeast into 
eastern Missouri by early this evening. A prolonged period of 
thunderstorms with occasional heavy rain will likely impact the 
terminal during the mid-late evening. Storms should move south of 
the terminal between 06-11z; timing is uncertain at this time. 
After storms exit the stl Metro area, expect MVFR cigs to rise to 
VFR during the morning. 


Carney 


&& 


Lsx watches/warnings/advisories: 
MO...Flash Flood Watch from 7 PM CDT this evening through Tuesday 
morning for Cole MO-Crawford MO-Franklin MO-Gasconade MO- 
Iron MO-Jefferson MO-Madison MO-Moniteau MO-Osage MO- 
Reynolds MO-St. Charles MO-St. Francois MO-St. Louis city 
MO-St. Louis MO-Ste. Genevieve MO-Warren MO-Washington MO. 


Illinois...Flash Flood Watch from 7 PM CDT this evening through Tuesday 
morning for Bond Illinois-Clinton Illinois-Fayette Illinois-Madison Illinois-Marion 
Illinois-Monroe Illinois-Montgomery Illinois-Randolph IL-St. Clair Illinois- 
Washington Illinois. 


&& 


$$ 


Weather forecast office lsx 



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