Saint Ann, Missouri Weather Conditions

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Excessive Heat Warning View All Alerts

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Current Conditions

  • 86°
  • Scattered Clouds
  • Wind: South 8 mph
  • Humidity: 70%
  • Visibility: 10.0 miles
  • Dew Point: 75°
  • Pressure: 29.97 in. +
  • Heat Index: 95

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Next 12 Hours

1  am
4  am
7  am
10  am
1  pm
Partly Cloudy
Partly Cloudy
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
82°
81°
81°
86°
93°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Partly Cloudy
  • High: 97 °
  • Low: 79 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 95 °
  • Low: 77 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 95 °
  • Low: 75 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 95 °
  • Low: 73 °
  • Partly Cloudy
  • Tuesday
  • Chance of a Thunderstorm
  • High: 93 °
  • Low: 73 °
  • Chance of T-Storms

Forecast for Saint Ann, Missouri

Updated: 10:00 PM CDT on August 21, 2014

Excessive heat warning in effect until 7 PM CDT Sunday...
  • Friday

    Partly cloudy. High of 97F with a heat index of 104F. Winds from the WSW at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Low of 79F. Winds less than 5 mph.

  • Saturday

    Partly cloudy. High of 95F with a heat index of 102F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy in the evening, then clear. Low of 77F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. High of 95F with a heat index of 100F. Winds from the SW at 5 to 10 mph.

  • Sunday Night

    Partly cloudy in the evening, then clear. Low of 75F. Winds from the SE at 5 to 10 mph.

  • Monday

    Partly cloudy. High of 95F with a heat index of 100F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy in the evening, then clear with a chance of a thunderstorm and rain. Low of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm and rain. High of 93F. Winds from the South at 5 to 10 mph. Chance of rain 50%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 73F. Winds from the SSE at 5 to 10 mph. Chance of rain 30% with rainfall amounts near 0.2 in. possible.

  • Wednesday

    Mostly cloudy with a chance of a thunderstorm. High of 86F with a heat index of 95F. Winds from the South at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Wednesday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.3 in. possible.

  • Thursday

    Mostly cloudy with a chance of a thunderstorm. High of 82F. Winds from the WNW at 5 to 10 mph. Chance of rain 60%.

  • Thursday Night

    Partly cloudy. Low of 59F. Winds less than 5 mph.

  • Friday

    Clear. High of 81F. Winds less than 5 mph.

  • Friday Night

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

  • Saturday

    Clear. High of 82F. Winds less than 5 mph.

  • Saturday Night

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

  • Sunday

    Clear. High of 84F. Winds less than 5 mph.

  • Sunday Night

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

  • Monday

    Clear. High of 86F. Winds less than 5 mph.

  • Monday Night

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

Severe Weather Alert Descriptions

 Excessive Heat Warning  Statement as of 3:49 PM CDT on August 21, 2014


... Excessive heat warning remains in effect until 7 PM CDT
Sunday...

* timing... dangerous levels of heat and humidity will continue
through the weekend.

* Heat index values... up to 107.

* 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.






Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: St. Ann, MO, St. Ann, MO

Updated: 12:46 AM CDT

Temperature: 82.2 °F Dew Point: 75 °F Humidity: 79% Wind: SW at 1.7 mph Pressure: 29.87 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: 1 Mile South of St. Louis Lambert Airport, Woodson Terrace, MO

Updated: 12:54 AM CDT

Temperature: 82.2 °F Dew Point: 76 °F Humidity: 82% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Maryland Heights, St Louis, MO

Updated: 12:47 AM CDT

Temperature: 83.0 °F Dew Point: 75 °F Humidity: 77% Wind: SSW at 4.0 mph Pressure: 29.27 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 12:54 AM CDT

Temperature: 81.4 °F Dew Point: 73 °F Humidity: 76% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Earth City, Earth City, MO

Updated: 1:40 AM EDT

Temperature: 84.5 °F Dew Point: 74 °F Humidity: 71% Wind: East at 6.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 12:54 AM CDT

Temperature: 82.8 °F Dew Point: 75 °F Humidity: 77% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 9:24 PM CDT

Temperature: 85.6 °F Dew Point: 73 °F Humidity: 67% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 12:54 AM CDT

Temperature: 82.6 °F Dew Point: 75 °F Humidity: 77% Wind: SE at 1.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Ladue Meadows, Creve Coeur, MO

Updated: 12:49 AM CDT

Temperature: 81.0 °F Dew Point: 75 °F Humidity: 81% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 12:54 AM CDT

Temperature: 84.2 °F Dew Point: 75 °F Humidity: 75% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

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

Updated: 12:47 AM CDT

Temperature: 83.2 °F Dew Point: 74 °F Humidity: 74% Wind: SSW at 1.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 12:10 AM CDT

Temperature: 81.5 °F Dew Point: 76 °F Humidity: 84% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Historic Saint Charles, Saint Charles, MO

Updated: 12:50 AM CDT

Temperature: 82.7 °F Dew Point: 76 °F Humidity: 79% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 12:52 AM CDT

Temperature: 83.6 °F Dew Point: 76 °F Humidity: 77% Wind: SE at 2.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Parkridge, Brentwood, MO

Updated: 12:53 AM CDT

Temperature: 82.9 °F Dew Point: - Humidity: - Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Talbridge, St. Charles, MO

Updated: 12:53 AM CDT

Temperature: 82.0 °F Dew Point: 74 °F Humidity: 77% Wind: North at 2.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 12:49 AM CDT

Temperature: 83.7 °F Dew Point: 68 °F Humidity: 59% Wind: NW at 3.8 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 12:53 AM CDT

Temperature: 81.7 °F Dew Point: 76 °F Humidity: 84% Wind: Calm Pressure: 29.92 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: Fox Hill, Saint Charles, MO

Updated: 9:43 PM CDT

Temperature: 86.0 °F Dew Point: 70 °F Humidity: 60% Wind: Calm Pressure: 29.38 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 12:47 AM CDT

Temperature: 82.6 °F Dew Point: 66 °F Humidity: 57% Wind: SSW at 2.0 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 12:50 AM CDT

Temperature: 81.7 °F Dew Point: 74 °F Humidity: 78% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 12:39 AM CDT

Temperature: 79.9 °F Dew Point: 74 °F Humidity: 81% Wind: Calm Pressure: 29.77 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 12:54 AM CDT

Temperature: 81.4 °F Dew Point: 72 °F Humidity: 74% Wind: SSW at 1.2 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 12:53 AM CDT

Temperature: 82.1 °F Dew Point: 75 °F Humidity: 79% Wind: South at 1.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

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

Updated: 12:41 AM CDT

Temperature: 82.0 °F Dew Point: 76 °F Humidity: 83% Wind: Calm Pressure: 29.93 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 12:54 AM CDT

Temperature: 80.4 °F Dew Point: 74 °F Humidity: 79% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 12:54 AM CDT

Temperature: 83.0 °F Dew Point: 73 °F Humidity: 72% Wind: NNE at 1.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

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

Updated: 12:52 AM CDT

Temperature: 82.4 °F Dew Point: 73 °F Humidity: 73% Wind: South at 1.6 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 88 °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 
1139 PM CDT Thu Aug 21 2014 


Update: 
issued at 927 PM CDT Thu Aug 21 2014 


Warm and muggy conditions for the rest of the night with upper 
level ridging over the region along with S-sely surface winds. It 
appears that most of the nocturnal convection will remain north of 
our forecast area for the remainder of the night, although there 
may be a few showers/storms across parts of northeast MO and west 
central Illinois. 


Gks 


&& 


Short term: (through late tonight) 
issued at 307 PM CDT Thu Aug 21 2014 


Isolated thunderstorms are possible late this afternoon and early 
tonight over the Eastern Ozarks. 


Kanofsky 


Long term: (friday through next thursday) 
issued at 307 PM CDT Thu Aug 21 2014 


Overall thinking remains similar to previous forecasts. An upper 
level ridge is expected to remain in place through early next 
week, bringing dangerous levels of heat and humidity to the 
region. 850 mb temperatures of 20-24 deg c and h9 temperatures of 
24-28 deg c support daytime highs in the mid to upper 90s through 
early next week. Dew points are forecast to be in the 60s and 70s. 
Heat index values will likely exceed 100 deg f each afternoon 
across most of the lsx cwa, and some locations will likely reach 
heat index values of 105-107 f. There remains a question about 
whether dew points will mix out over the Ozarks on one or more 
days during this stretch of hot weather, resulting in lower heat 
index values. Since the heat advisory was issued primarily for 
duration (4 days of heat index values exceeding 100 deg f), we 
will wait to see how afternoon dew points respond and will hold 
off on expanding the heat advisory to the southwest. The heat 
advisory will be expanded eastward to include two more Illinois 
counties after collaboration with neighboring offices. No changes 
were made to the excessive heat warning. 


Latest models continue to depict significant differences regarding 
how/if/when the upper ridge breaks down next week. These 
differences Stem from how the models handle the interaction 
between a shortwave moving down the Pacific northwest coast and a 
closed low over Mt/WY. European model (ecmwf)/Gem both have less phasing and nearly 
develop a cutoff low over Nevada/Utah while the GFS has greater phasing 
between these features and is much more progressive with the 
overall pattern. Generally followed the recommended CR 
initialization for the extended forecast periods pending improved 
model agreement. Although there may be some isolated 
thunderstorms (especially over the ozarks), there appears to be 
very little chance for widespread rainfall until the middle of 
next week. 


Kanofsky 


&& 


Aviation: (for the 06z tafs through 06z Friday night) 
issued at 1125 PM CDT Thu Aug 21 2014 


VFR conditions are expected to continue over the next 24 hours 
outside of any convection. Some activity has developed over far 
south-central Iowa over and will have to be watched as some of 
these storms may approach KUIN. Left KUIN dry though for now as 
mid/upper level winds suggest aforementioned storms should move 
east and stay north of site. Otherwise...hot/humid weather to 
continue with winds by day out of the southwest and at night 
backing to a more southeasterly direction. Did add a thunderstorms in the vicinity group at 
KUIN for Friday evening as a warm front will move northeast with 
some convection firing near this boundary per latest model guidance. 




Specifics for kstl: 


VFR conditions are expected to continue over the next 30 hours 
outside of any convection. Hot/humid weather to 
continue with winds by day out of the southwest and at night 
backing to a more southeasterly direction. Could be some widely 
scattered storms Friday afternoon as a boundary lifts to the north 
and east...but left out of taf for now as probability of 
occurrence of a storm affecting the terminal is quite low. 


Gosselin 


&& 


Lsx watches/warnings/advisories: 
MO...heat advisory until 7 PM CDT Sunday for Audrain MO-Boone MO- 
Callaway MO-Cole MO-Franklin MO-Gasconade MO-Jefferson MO- 
Lincoln MO-Madison MO-Moniteau MO-Montgomery MO-Osage MO- 
St. Charles MO-St. Francois MO-Ste. Genevieve MO-Warren MO. 


Excessive heat warning until 7 PM CDT Sunday for St. Louis city 
MO-St. Louis MO. 


Illinois...heat advisory until 7 PM CDT Sunday for Bond Illinois-Calhoun Illinois- 
Clinton Illinois-Fayette Illinois-Greene Illinois-Jersey Illinois-Macoupin Illinois- 
Marion Illinois-Monroe Illinois-Montgomery Illinois-Randolph Illinois-Washington Illinois. 


Excessive heat warning until 7 PM CDT Sunday for Madison IL-St. 
Clair Illinois. 


&& 


$$ 


Weather forecast office lsx 



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