Saint Ann, Missouri Weather Conditions

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Current Conditions

  • 63°
  • Overcast
  • Wind: East 7 mph
  • Humidity: 77%
  • Visibility: 10.0 miles
  • Dew Point: 55°
  • Pressure: 29.99 in. 0

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Fog
Fog
Mostly Cloudy
Mostly Cloudy
Overcast
Overcast
Partly Cloudy
Partly Cloudy
Clear
Clear
61°
64°
64°
72°
73°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Partly Cloudy
  • High: 73 °
  • Low: 57 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 79 °
  • Low: 64 °
  • Partly Cloudy
  • Saturday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 66 °
  • Chance of T-Storms
  • Sunday
  • Partly Cloudy
  • High: 82 °
  • Low: 55 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 73 °
  • Low: 54 °
  • Partly Cloudy

Forecast for Saint Ann, Missouri

Updated: 4:00 AM CDT on September 18, 2014

  • Thursday

    Overcast in the morning, then partly cloudy. High of 73F. Winds from the East at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 57F. Winds from the South at 5 to 10 mph.

  • Friday

    Partly cloudy in the morning, then overcast. High of 79F. Winds from the SE at 5 to 10 mph.

  • Friday Night

    Clear in the evening, then partly cloudy. Low of 64F. Winds from the SSE at 5 to 15 mph.

  • Saturday

    Mostly cloudy in the morning, then overcast with a chance of a thunderstorm and a chance of rain. High of 84F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.

  • Saturday Night

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. Low of 66F. Winds from the WSW at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 82F. Winds from the NNW at 5 to 10 mph.

  • Sunday Night

    Clear in the evening, then partly cloudy. Low of 55F. Winds from the North at 5 to 10 mph.

  • Monday

    Partly cloudy. High of 73F. Winds less than 5 mph.

  • Monday Night

    Clear. Low of 54F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy. High of 72F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Low of 52F. Winds less than 5 mph.

  • Wednesday

    Partly cloudy. High of 73F. Winds less than 5 mph.

  • Wednesday Night

    Partly cloudy. Low of 52F. Winds from the ESE at 5 to 10 mph.

  • Thursday

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

  • Thursday Night

    Partly cloudy. Low of 54F. Winds from the SSE at 5 to 10 mph.

  • Friday

    Partly cloudy. High of 75F. Winds less than 5 mph.

  • Friday Night

    Clear. Fog overnight. Low of 54F. Winds less than 5 mph.

  • Saturday

    Clear. High of 75F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 57F. Winds less than 5 mph.

  • Sunday

    Clear. High of 73F. Winds less than 5 mph.

  • Sunday Night

    Clear. Fog overnight. Low of 57F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

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

Updated: 4:25 AM CDT

Temperature: 60.6 °F Dew Point: 56 °F Humidity: 86% Wind: Calm Pressure: 29.92 in Hourly Precipitation: - Graphs

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

Updated: 4:40 AM CDT

Temperature: 59.9 °F Dew Point: 57 °F Humidity: 90% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 4:40 AM CDT

Temperature: 61.2 °F Dew Point: 56 °F Humidity: 82% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Graphs

Location: Maryland Heights, MO

Updated: 4:37 AM CDT

Temperature: 61.5 °F Dew Point: 58 °F Humidity: 87% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Graphs

Location: Earth City, Earth City, MO

Updated: 5:28 AM EDT

Temperature: 61.5 °F Dew Point: 57 °F Humidity: 85% Wind: East at 1.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Graphs

Location: Ross Ave, St. Louis, MO

Updated: 4:40 AM CDT

Temperature: 61.7 °F Dew Point: 56 °F Humidity: 81% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 4:40 AM CDT

Temperature: 61.0 °F Dew Point: 57 °F Humidity: 87% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 4:40 AM CDT

Temperature: 61.0 °F Dew Point: 58 °F Humidity: 89% Wind: Calm Pressure: 29.59 in Hourly Precipitation: 0.00 in Graphs

Location: Riverwood Place, Florissant, MO

Updated: 4:40 AM CDT

Temperature: 60.6 °F Dew Point: 58 °F Humidity: 90% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 4:27 AM CDT

Temperature: 60.4 °F Dew Point: 56 °F Humidity: 84% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Graphs

Location: Ladue, St. Louis, MO

Updated: 4:30 AM CDT

Temperature: 62.1 °F Dew Point: - Humidity: 77% Wind: North at - Pressure: 29.31 in Hourly Precipitation: - Graphs

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

Updated: 4:33 AM CDT

Temperature: 61.3 °F Dew Point: 57 °F Humidity: 87% Wind: Calm Pressure: 29.51 in Hourly Precipitation: 0.00 in Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 4:38 AM CDT

Temperature: 61.2 °F Dew Point: 58 °F Humidity: 88% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Parkridge, Brentwood, MO

Updated: 4:39 AM CDT

Temperature: 62.2 °F Dew Point: - Humidity: - Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Graphs

Location: Talbridge, St. Charles, MO

Updated: 4:40 AM CDT

Temperature: 61.0 °F Dew Point: 57 °F Humidity: 86% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Graphs

Location: Lindenwood, St. Charles, MO

Updated: 4:39 AM CDT

Temperature: 60.5 °F Dew Point: 58 °F Humidity: 91% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Jost Farm, Florissant, MO

Updated: 4:40 AM CDT

Temperature: 59.7 °F Dew Point: 52 °F Humidity: 77% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 4:33 AM CDT

Temperature: 61.7 °F Dew Point: 57 °F Humidity: 85% Wind: Calm Pressure: 29.96 in Hourly Precipitation: - Graphs

Location: Forest Park, St. Louis, MO

Updated: 4:30 AM CDT

Temperature: 61.7 °F Dew Point: - Humidity: 81% Wind: North at - Pressure: 29.39 in Hourly Precipitation: 0.00 in Graphs

Location: Danielle Downs, St. Peters, MO

Updated: 4:40 AM CDT

Temperature: 61.7 °F Dew Point: 60 °F Humidity: 95% Wind: ESE at 1.6 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 4:30 AM CDT

Temperature: 61.7 °F Dew Point: 51 °F Humidity: 69% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 4:40 AM CDT

Temperature: 64.1 °F Dew Point: 57 °F Humidity: 77% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 4:37 AM CDT

Temperature: 60.6 °F Dew Point: 56 °F Humidity: 86% Wind: Calm Pressure: 29.80 in Hourly Precipitation: - Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 4:40 AM CDT

Temperature: 60.5 °F Dew Point: 56 °F Humidity: 84% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Harvester, St. Charles, MO

Updated: 4:30 AM CDT

Temperature: 61.5 °F Dew Point: 58 °F Humidity: 88% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 4:39 AM CDT

Temperature: 60.4 °F Dew Point: 57 °F Humidity: 89% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 4:38 AM CDT

Temperature: 61.3 °F Dew Point: 58 °F Humidity: 89% Wind: Calm Pressure: 29.97 in Hourly Precipitation: - Graphs

Location: West Drive, St. Peters, MO

Updated: 4:40 AM CDT

Temperature: 60.5 °F Dew Point: 57 °F Humidity: 86% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 4:40 AM CDT

Temperature: 60.9 °F Dew Point: 58 °F Humidity: 89% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 4:32 AM CDT

Temperature: 61.7 °F Dew Point: 55 °F Humidity: 78% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
349 am CDT Thu Sep 18 2014 


Short term: (through late this afternoon) 
issued at 347 am CDT Thu Sep 18 2014 


Passage of weak shortwave overnight is going to give the surface 
ridge extending from the upper Great Lakes into the mid-mississipi 
valley a bit of a southwest nudge today. The resultant 
intensification of the surface high will mean an increasing easterly 
low level flow in the lowest 5kft of the ams, which should advect 
drier air from S Illinois into our area. Impacts of this dry air can be 
seen in ceiling trends indicate that lower stratus is having a 
difficult time forming over S Illinois. 


Low cloud infrared imagery early this morning is also showing the impacts 
of this drier air, as northern edge of cloud deck is remaining 
quasi-stationary from just south of ppq to near Effingham/1h2. 
However, ground fog is forming in the clear skies on the northern 
fringes of this cloud deck, and after checking with several County 
sheriffs in NE MO/W central IL, will be issuing a dense fog advisory 
til 9am this morning for areas along and north of a Paris-Bowling 
Green line. 


With the increasing easterly low level flow, believe there should be 
a gradual decrease in clouds from west to east during the day. 
Given low cloud tendencies over the County Warning Area the last few weeks I hate to 
be too optimistic, but aforementioned trends as well as good 
agreement in the models regarding the low level moisture profile 
seem to indicate this clearing trend. However, the emphasis will be 
on "gradual", as we will also be contending with some high level 
cloudiness spreading east from the convection over eastern Kansas/SW MO, 
at least during the morning. 


As far as showers and thunderstorm threat is concerned...axis of 
convection is gradually sagging south as redevelopment continues on 
the west/south side of the rain-cooled boundary. With this boundary 
remaining active, the shower and thunderstorm threat should remain 
southwest of our County Warning Area. 


Truett 


Long term: (tonight through wednesday) 
issued at 347 am CDT Thu Sep 18 2014 


A ridge of high pressure extending from the Great Lakes region 
southwest into eastern MO should keep any precipitation west of our 
forecast area tonight. Warmer temperatures can be expected on 
Friday as an upper level ridge shifts eastward into MO, and surface 
winds become southerly on the western periphery of the surface ridge 
extending southwest into southeastern MO. The chance of convection 
will return Saturday afternoon and night as the upper level ridge 
flattens as an upper level trough deepens over the northern plains 
and Great Lakes region. As the trough deepens it will send a cold 
front southeastward through our forecast area Saturday night and 
Sunday morning. At least scattered showers/storms are expected 
along this front. It appears that most of the precipitation will 
shift south of our forecast area by Sunday afternoon as a strong 
surface ridge builds into the region behind the cold front with 
cooler and drier air filtering southeastward into our area. Both 
the GFS and European model (ecmwf) models drop the 8 degree c 850 mb isotherm 
southward to stl by 12z Monday. A dry and cool period of weather is 
expected for the remainder of the extended forecast with 
northwesterly upper level flow and as the surface ridge moves slowly 
eastward through the region. 


Gks 


&& 


Aviation: (for the 06z tafs through 06z Thursday night) 
issued at 1143 PM CDT Wed Sep 17 2014 


MVFR flight conditions remain widespread from southwest Illinois across 
eastern MO where they deteriorate to IFR across central and 
western MO. Further north where skies cleared earlier, additional 
fog and stratus is quickly developing. Conditions should deteriorate 
overnight at KUIN and kcou with dense fog/LIFR flight conditions 
expected. For the St. Louis Metro terminals I am expecting it to 
remain status quo given the current T/TD spreads and thus MVFR 
flight conditions. All terminals should see improvement beginning 
around 15z and then continued rising of ceiling heights and cloud 
cover from late morning into the afternoon. 


Specifics for kstl: 


Little change expected overnight with MVFR flight conditions 
persisting. Anticipating improvement in cig heights beginning 
around 15z, and then continued rising of ceiling heights and 
reduction in cloud cover from late morning into the afternoon. 


Glass 


&& 


Lsx watches/warnings/advisories: 
MO...dense fog advisory until 9 am CDT this morning for Knox MO-Lewis 
MO-Marion MO-Monroe MO-Pike MO-Ralls MO-Shelby MO. 


Illinois...dense fog advisory until 9 am CDT this morning for Adams Illinois- 
Brown Illinois-Pike Illinois. 


&& 


$$ 


Weather forecast office lsx 












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