Saint Ann, Missouri Weather Conditions

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Excessive Heat Warning View All Alerts

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Current Conditions

  • 89°
  • Mostly Cloudy
  • Wind: SW 4 mph
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 75°
  • Pressure: 29.93 in. 0
  • Heat Index: 99

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Next 12 Hours

11  am
2  pm
5  pm
8  pm
11  pm
Partly Cloudy
Partly Cloudy
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
89°
94°
94°
90°
85°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of a Thunderstorm
  • High: 97 °
  • Low: 80 °
  • Chance of T-Storms
  • Wednesday
  • Partly Cloudy
  • High: 91 °
  • Low: 68 °
  • Partly Cloudy
  • Thursday
  • Clear
  • High: 89 °
  • Low: 69 °
  • Clear
  • Friday
  • Clear
  • High: 91 °
  • Low: 70 °
  • Clear
  • Saturday
  • Clear
  • High: 90 °
  • Low: 70 °
  • Clear

Forecast for Saint Ann, Missouri

Updated: 7:00 AM CDT on January 28, 2015

Excessive heat warning in effect until 9 PM CDT this evening...
  • Tuesday

    Partly cloudy with afternoon showers or thunderstorms. High 97F. Winds SW at 5 to 10 mph. Chance of rain 50%.

  • Tuesday Night

    Partly cloudy this evening. Scattered thunderstorms developing after midnight. Low near 80F. Winds S at 5 to 10 mph. Chance of rain 60%.

  • Wednesday

    Partly cloudy skies. A stray shower or thunderstorm is possible. High 91F. Winds NW at 10 to 20 mph.

  • Wednesday Night

    Clear skies. Low 68F. Winds NNW at 10 to 15 mph.

  • Thursday

    Mainly sunny. High 89F. Winds NNW at 5 to 10 mph.

  • Thursday Night

    Clear skies. Low 69F. Winds NW at 5 to 10 mph.

  • Friday

    A mainly sunny sky. High 91F. Winds NW at 5 to 10 mph.

  • Friday Night

    A mostly clear sky. Low around 70F. Winds light and variable.

  • Saturday

    A mainly sunny sky. High near 90F. Winds NNW at 5 to 10 mph.

  • Saturday Night

    A mostly clear sky. Low around 70F. Winds light and variable.

  • Sunday

    Sunny skies. High 92F. Winds SW at 5 to 10 mph.

  • Sunday Night

    Clear skies with a few passing clouds. Low 72F. Winds S at 5 to 10 mph.

  • Monday

    Sun and a few passing clouds. High 92F. Winds SW at 5 to 10 mph.

  • Monday Night

    A few clouds overnight. Low 71F. Winds ESE at 5 to 10 mph.

  • Tuesday

    Sunshine and clouds mixed. High 89F. Winds SSE at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy skies. Low around 70F. Winds SE at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High 88F. Winds SSW at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy skies. Low 71F. Winds SSE at 5 to 10 mph.

  • Thursday

    Intervals of clouds and sunshine. High 87F. Winds S at 5 to 10 mph.

  • Thursday Night

    Scattered showers and thunderstorms. Low 69F. Winds SSE at 5 to 10 mph. Chance of rain 60%.

  • Friday

    Mixed clouds and sun with scattered thunderstorms. High 86F. Winds SSW at 5 to 10 mph. Chance of rain 60%.

  • Friday Night

    Variable clouds with scattered thunderstorms. Low 69F. Winds SE at 5 to 10 mph. Chance of rain 60%.

Severe Weather Alert Descriptions

 Excessive Heat Warning  Statement as of 3:08 am CDT on July 28, 2015


... Excessive heat warning remains in effect until 9 PM CDT this
evening...

* timing... dangerous heat index values will be reached during the
afternoon and early evening hours today.

* Heat index values... up to 110.

* Impacts... the combination of hot temperatures and high
humidity will likely 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 can reach lethal temperatures in a matter
of minutes.

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.






 Local Storm Report 



07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road




07/27/2015 0600 PM

Ballwin, St Louis County.

Thunderstorm wind damage, reported by amateur radio.


            Two large branches... 12 to 18 inches in
            diameter... blown down




07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road




07/27/2015 0600 PM

Ballwin, St Louis County.

Thunderstorm wind damage, reported by amateur radio.


            Two large branches... 12 to 18 inches in
            diameter... blown down




07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road




07/27/2015 0600 PM

Ballwin, St Louis County.

Thunderstorm wind damage, reported by amateur radio.


            Two large branches... 12 to 18 inches in
            diameter... blown down




07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road





07/27/2015 0600 PM

Ballwin, St Louis County.

Thunderstorm wind damage, reported by amateur radio.


            Two large branches... 12 to 18 inches in
            diameter... blown down





07/27/2015 0600 PM

Ballwin, St Louis County.

Thunderstorm wind damage, reported by amateur radio.


            Two large branches... 12 to 18 inches in
            diameter... blown down





07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road





07/27/2015 0550 PM

Town And Country, St Louis County.

Thunderstorm wind gust e55 mph, reported by trained spotter.


            Pea size hail near the intersection of Hwy 141 and
            Clayton Road




Personal Weather Stations

Personal Weather Stations [Add your weather station!]

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

Updated: 10:15 AM CDT

Temperature: 85.7 °F Dew Point: 79 °F Humidity: 81% Wind: Calm Pressure: 27.92 in Hourly Precipitation: 0.00 in Heat Index: 99 °F Graphs

Location: APRSWXNET, Saint Louis, MO

Updated: 9:59 AM CDT

Temperature: 83 °F Dew Point: 79 °F Humidity: 89% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Maryland Heights, MO

Updated: 10:11 AM CDT

Temperature: 86.0 °F Dew Point: 80 °F Humidity: 81% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 10:16 AM CDT

Temperature: 86.8 °F Dew Point: 79 °F Humidity: 77% Wind: NNW at 2.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Rule Place Court, Maryland Heights, MO

Updated: 10:16 AM CDT

Temperature: 85.8 °F Dew Point: 78 °F Humidity: 76% Wind: North at - Pressure: 29.79 in Hourly Precipitation: - Heat Index: 97 °F Graphs

Location: Honeygrove Court, Saint Louis, MO

Updated: 10:15 AM CDT

Temperature: 81.5 °F Dew Point: 78 °F Humidity: 90% Wind: North at - Pressure: 29.96 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 10:16 AM CDT

Temperature: 86.0 °F Dew Point: 76 °F Humidity: 73% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 10:15 AM CDT

Temperature: 85.7 °F Dew Point: 79 °F Humidity: 80% Wind: SE at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 99 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 10:16 AM CDT

Temperature: 88.7 °F Dew Point: 79 °F Humidity: 74% Wind: Calm Pressure: 29.40 in Hourly Precipitation: 0.00 in Heat Index: 105 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 10:16 AM CDT

Temperature: 88.4 °F Dew Point: 79 °F Humidity: 74% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 104 °F Graphs

Location: Creve Coeur, Saint Louis, MO

Updated: 10:16 AM CDT

Temperature: 87.8 °F Dew Point: 78 °F Humidity: 73% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Historic Saint Charles, Saint Charles, MO

Updated: 10:15 AM CDT

Temperature: 85.4 °F Dew Point: 78 °F Humidity: 80% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 10:15 AM CDT

Temperature: 87.8 °F Dew Point: 79 °F Humidity: 76% Wind: SW at 1.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 103 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 10:16 AM CDT

Temperature: 87.6 °F Dew Point: 80 °F Humidity: 77% Wind: North at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 103 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 10:15 AM CDT

Temperature: 85.5 °F Dew Point: 80 °F Humidity: 85% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 10:15 AM CDT

Temperature: 94.6 °F Dew Point: 69 °F Humidity: 44% Wind: NW at 4.5 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Raritan Drive, Webster Groves, MO

Updated: 10:15 AM CDT

Temperature: 86.7 °F Dew Point: 81 °F Humidity: 84% Wind: North at - Pressure: 30.01 in Hourly Precipitation: - Heat Index: 104 °F Graphs

Location: Fawnridge Drive, Saint Louis, MO

Updated: 10:15 AM CDT

Temperature: 81.9 °F Dew Point: 80 °F Humidity: 93% Wind: North at - Pressure: 30.07 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 10:03 AM CDT

Temperature: 86.5 °F Dew Point: 78 °F Humidity: 77% Wind: Calm Pressure: 29.91 in Hourly Precipitation: - Heat Index: 100 °F Graphs

Location: Fox Hill, Saint Charles, MO

Updated: 10:16 AM CDT

Temperature: 88.0 °F Dew Point: 77 °F Humidity: 70% Wind: Calm Pressure: 29.29 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Fox Lake Meadows, Florissant, MO

Updated: 10:04 AM CDT

Temperature: 92.3 °F Dew Point: 77 °F Humidity: 62% Wind: Calm Pressure: 29.92 in Hourly Precipitation: - Heat Index: 107 °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 
700 am CDT Tuesday Jul 28 2015 


Short term: (through wednesday) 
issued at 309 am CDT Tuesday Jul 28 2015 


Oppressively hot and humid conditions will persist today beneath 
an upper level ridge axis. The presence of outflow boundaries 
within a nearly uncapped atmosphere has been sufficient for 
isolated to scattered sh/ts over the last couple of days, and 
since neither the air mass nor the forecast 700 mb temperatures have 
changed significantly from the last few days, a similar precipitation 
scenario is expected today. Generally followed 700 mb temperatures as 
a proxy for capping to determine placement of schc probability of precipitation. 


A low pressure system moving along the US/Canada border will send 
a cold front through the plains today/tonight. Since the upper 
flow becomes northwesterly behind the low pressure system in 
response to a building ridge over the West Coast, odds are good 
that this cold front will move through MO/Illinois on Wednesday/Wednesday night and 
bring relief from the recent heat/humidity for a couple of days. 
Sh/ts may accompany the front on Wednesday but precipitation should taper 
off across the County Warning Area by Wednesday night. 


Kanofsky 


Long term: (thursday through monday) 
issued at 309 am CDT Tuesday Jul 28 2015 


Thursday and Friday look spectacularly drier and less humid within 
the Post-frontal air mass. The building ridge over the western 
Continental U.S. Will keep northwest flow in place over MO/Illinois through the weekend. 
Both the 12z and 00z runs of the GFS/European model (ecmwf) disagree on the extent 
of the northwest flow, however-- the ec is farther north with a low 
pressure system in Canada which keeps the flow nearly quasizonal 
but the GFS is farther south with the low in Canada which leads to 
a sharper northwest flow solution. A couple of disturbances moving 
through the flow could support periods of sh/ts late this weekend 
and/or early next week, but such features are too poorly resolved 
this far in advance to have confidence in probability of precipitation greater than schc- 
chance. Temperatures will moderate to seasonably warm upper 80s to 
lower 90s. 


Kanofsky 


&& 


Aviation: (for the 12z tafs through 12z Wednesday morning) 
issued at 637 am CDT Tuesday Jul 28 2015 


Have generally gone with persistence for this taf set. Overnight 
guidance including almost all hi-res convection models are 
forecasting the development of afternoon convection...in 
apparently a similar fashion to that of yesterday. Given the fact 
that 00z and 06z runs are maintaining a subtle surface boundary 
over the area, and that there is very little change in the prognosticated 
instability and cin (almost no change to middle-level temps) this 
redevelopment certainly appears to be plausible. Since exact 
location/coverage is still uncertain have gone with thunderstorms in the vicinity at this 
point for KUIN and stl metropolitan tafs from middle afternoon into the 
early evening hours. Prevailing conditions should be scattered cumulus 
with bases 3-5kft...but with air mass exhibiting a similar thermal and 
moisture profile to yesterday stronger storms will once again 
produce localized heavy downpours and wind gusts. Once this 
activity dissipates, concern turns to convection developing along 
and ahead of advancing cold front for later tonight. There is 
still some hints of convection developing in the warm advection 
zone ahead of the cold front so have reintroduced thunderstorms in the vicinity at KUIN as 
soon as 06z. Believe that this elevated convection...if it does 
occur...will be north of stl Metro, but will have to keep an eye 
on this. Additional storm threat should persist at KUIN into the 
predawn hours with upstream cold front and likely associated 
outflow. 


Specifics for kstl: as noted in the primary afd discussion...it 
appears another round of convection will be possible this 
afternoon and early this evening, and have used timing of 
yesteday storms to approximate today's threat. Strongest storms 
will certainly have IFR ceilings/visibilities with localized heavy rain and 
wind gusts...but outside of storms expecting scattered cumulus with 
bases 3-5kft. This threat should diminish by early this evening, 
and we will then have to keep an eye on elevated convection 
forming during the predawn hours in the warm advection zone south 
of approaching cold front. For now believe this activity will 
primarily be north of kstl. There is quite a bit of uncertainty 
about how much convection/precipitation will still be occurring with the 
cold front by the time it pushes into the area late Wednesday 
morning, so at this point have kept taf dry through 18z. 


Truett 


&& 


Lsx watches/warnings/advisories: 
MO...excessive heat warning until 9 PM CDT this evening for Boone MO- 
Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO- 
Iron MO-Jefferson MO-Lincoln MO-Madison MO-Moniteau MO- 
Montgomery 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. 


Heat advisory until 9 PM CDT this evening for Audrain MO-Knox MO- 
Lewis MO-Marion MO-Monroe MO-Pike MO-Ralls MO-Shelby MO. 


Illinois...excessive heat warning until 9 PM CDT this evening for Calhoun 
Illinois-Jersey Illinois-Madison Illinois-Monroe Illinois-Randolph IL-St. Clair Illinois. 


Heat advisory until 9 PM CDT this evening for Adams Illinois-Bond Illinois- 
Brown Illinois-Clinton Illinois-Fayette Illinois-Greene Illinois-Macoupin Illinois-Marion 
Illinois-Montgomery Illinois-Pike Illinois-Washington Illinois. 


&& 


$$ 


Weather forecast office lsx 






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