Crystal City, Missouri Weather Conditions

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Current Conditions

  • 70°
  • Clear
  • Wind: Calm
  • Humidity: 97%
  • Visibility: 10.0 miles
  • Dew Point: 69°
  • Pressure: 29.85 in. +

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Next 12 Hours

7  am
10  am
1  pm
4  pm
7  pm
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
72°
81°
90°
95°
88°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Chance of a Thunderstorm
  • High: 95 °
  • Low: 73 °
  • Chance of a Thunderstorm
  • Thursday
  • Partly Cloudy
  • High: 97 °
  • Low: 75 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 99 °
  • Low: 72 °
  • Partly Cloudy
  • Saturday
  • Clear
  • High: 95 °
  • Low: 73 °
  • Clear
  • Sunday
  • Partly Cloudy
  • High: 102 °
  • Low: 72 °
  • Partly Cloudy

Forecast for Crystal City, Missouri

Updated: 10:00 AM CDT on August 19, 2014

Heat advisory in effect from 1 PM this afternoon to 7 PM CDT Sunday...
  • Wednesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 95F with a heat index of 104F. Winds from the SW at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 73F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.

  • Thursday

    Partly cloudy. High of 97F with a heat index of 106F. Winds from the SW at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Low of 75F. Winds from the SSW at 5 to 10 mph.

  • Friday

    Partly cloudy in the morning, then clear. High of 99F. Winds from the SW at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Low of 72F. Winds from the SSW at 5 to 10 mph.

  • Saturday

    Clear in the morning, then partly cloudy. High of 95F. Winds from the WSW at 5 to 10 mph.

  • Saturday Night

    Clear. Low of 73F. Winds from the SSW at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 102F. Winds from the WSW at 5 to 10 mph.

  • Sunday Night

    Partly cloudy. Low of 72F. Winds from the SSE at 5 to 10 mph.

  • Monday

    Partly cloudy with a chance of a thunderstorm. High of 90F. Winds from the West at 5 to 10 mph. Chance of rain 40%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Low of 72F. Winds less than 5 mph. Chance of rain 20%.

  • Tuesday

    Partly cloudy. High of 88F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Fog overnight. Low of 68F. Winds less than 5 mph.

  • Wednesday

    Clear with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday Night

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

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 50%.

  • Friday

    Mostly cloudy. High of 81F. Winds less than 5 mph.

  • Friday Night

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

Severe Weather Alert Descriptions

 Heat Advisory  Statement as of 3:10 am CDT on August 20, 2014


... Heat advisory in effect from 1 PM this afternoon to 7 PM CDT
Sunday...

The National Weather Service in St Louis has issued a heat
advisory... which is in effect from 1 PM this afternoon to 7 PM
CDT Sunday.

* Timing... dangerous levels of heat and humidity will begin on
Wednesday afternoon... and will continue for the rest of the week
and into the upcoming weekend.

* Heat index values... up to 105 due to temperatures in the mid
90s... and dewpoints around 70.

* 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. 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.






Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: MesoWest MAEYS1 IL US UPR, Maeystown, IL

Updated: 2:55 AM CDT

Temperature: 67 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Sandy Creek Winery, Pevely, MO

Updated: 5:42 AM CDT

Temperature: 67.9 °F Dew Point: 68 °F Humidity: 99% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 5:43 AM CDT

Temperature: 69.1 °F Dew Point: 69 °F Humidity: 99% Wind: Calm Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Imperial - Wellington Subdivision, Imperial, MO

Updated: 5:43 AM CDT

Temperature: 70.2 °F Dew Point: 69 °F Humidity: 97% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: summerfield, Imperial, MO

Updated: 5:43 AM CDT

Temperature: 68.2 °F Dew Point: 68 °F Humidity: 99% Wind: Calm Pressure: 29.62 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Imperial, MO

Updated: 5:43 AM CDT

Temperature: 68.9 °F Dew Point: 65 °F Humidity: 87% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Ste Genevieve county, Festus, MO

Updated: 5:41 AM CDT

Temperature: 69.7 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hardy Acres / AA9UC, Waterloo, IL

Updated: 5:42 AM CDT

Temperature: 72.8 °F Dew Point: 56 °F Humidity: 55% Wind: Calm Pressure: 29.91 in Hourly Precipitation: - Heat Index: 77 °F Graphs

Location: Wynfield Terrace, St. Louis, MO

Updated: 5:43 AM CDT

Temperature: 70.7 °F Dew Point: 69 °F Humidity: 96% Wind: South at 3.1 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Arnold, Arnold, MO

Updated: 5:39 AM CDT

Temperature: 69.9 °F Dew Point: 69 °F Humidity: 97% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Arnold, MO

Updated: 5:38 AM CDT

Temperature: 69.3 °F Dew Point: 68 °F Humidity: 96% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 5:43 AM CDT

Temperature: 71.8 °F Dew Point: 71 °F Humidity: 96% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Christopher Winds, Oakville, MO

Updated: 5:31 AM CDT

Temperature: 72.5 °F Dew Point: 71 °F Humidity: 96% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 5:43 AM CDT

Temperature: 70.7 °F Dew Point: 69 °F Humidity: 95% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 5:43 AM CDT

Temperature: 70.8 °F Dew Point: 70 °F Humidity: 99% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Devall's Backyard, Waterloo, IL

Updated: 5:30 AM CDT

Temperature: 71.5 °F Dew Point: 70 °F Humidity: 96% Wind: Calm Pressure: 29.87 in Hourly Precipitation: - Heat Index: - Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 5:40 AM CDT

Temperature: 70.0 °F Dew Point: 69 °F Humidity: 97% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 5:43 AM CDT

Temperature: 70.2 °F Dew Point: 69 °F Humidity: 97% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 5:43 AM CDT

Temperature: 69.4 °F Dew Point: 69 °F Humidity: 99% Wind: East at 2.2 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Gedern Village, Columbia, IL

Updated: 5:42 AM CDT

Temperature: 70.2 °F Dew Point: 70 °F Humidity: 99% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Gerry's Pool, Prairie Du Rocher, IL

Updated: 5:40 AM CDT

Temperature: 70.0 °F Dew Point: 67 °F Humidity: 91% Wind: NW at 1.6 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 5:30 AM CDT

Temperature: 75.3 °F Dew Point: 72 °F Humidity: 88% Wind: SW at 3.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: MesoWest KIDD1 IL US UPR, Prairie Du Rocher, IL

Updated: 4:20 AM CDT

Temperature: 66 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: K0GDI, Blackwell, MO

Updated: 5:43 AM CDT

Temperature: 69.5 °F Dew Point: 68 °F Humidity: 94% Wind: Calm Pressure: 29.73 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: South St. Louis County, St. Louis, MO

Updated: 5:41 AM CDT

Temperature: 77.4 °F Dew Point: - Humidity: 78% Wind: Calm Pressure: 29.21 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: San Luis Trails, Fenton, MO

Updated: 5:43 AM CDT

Temperature: 71.8 °F Dew Point: 70 °F Humidity: 93% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: St. Joseph Hill, Pacific, MO

Updated: 5:35 AM CDT

Temperature: 67.5 °F Dew Point: 66 °F Humidity: 96% Wind: Calm Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: St. Louis, MO

Updated: 5:43 AM CDT

Temperature: 71.4 °F Dew Point: 70 °F Humidity: 94% Wind: Calm Pressure: 29.74 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Lake Forest, Ste Genevieve, MO

Updated: 5:43 AM CDT

Temperature: 70.5 °F Dew Point: 59 °F Humidity: 66% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: South County, Affton, MO

Updated: 5:43 AM CDT

Temperature: 71.8 °F Dew Point: 70 °F Humidity: 94% Wind: Calm Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Crestwood, Crestwood, MO

Updated: 5:29 AM CDT

Temperature: 70.7 °F Dew Point: 67 °F Humidity: 89% Wind: Calm Pressure: 29.56 in Hourly Precipitation: - Heat Index: - Graphs

Location: Sunset Hills, St Louis, MO

Updated: 5:34 AM CDT

Temperature: 71.9 °F Dew Point: 71 °F Humidity: 95% Wind: Calm Pressure: 29.83 in Hourly Precipitation: - Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
400 am CDT Wed Aug 20 2014 


Short term: (through tonight) 
issued at 240 am CDT Wed Aug 20 2014 


Main focus thru the period will be pops, which will influence 
temps today and therefore, also headlines. 


There is still some uncertainty regarding heat headlines thru the 
weekend, but will go ahead and issue a heat advisory for portions 
of central and ern MO and SW Illinois. This expansion is due to expected 
heat index values of 100+ for at least 4 days. However, values of 
105+ degrees may be possible across the adv area, especially thurs 
and Fri. This adv may need to be expanded to include counties not 
currently in the adv. However, since criteria is not expected to 
be reached today, will handle that area tomorrow. 


Dewpoints are the main question as portions of central and southeast MO 
have been mixing out well the past few days. These are the areas 
that have seen the least rainfall lately and generally mix out 
well during the day. Have therefore kept the ern Ozarks out of the 
adv for now. 


As for pops...the hrrr, local 4km WRF and the 4km NSSL WRF seem 
to be handling the current convection fairly well. Have therefore 
tailored pops for the remainder of today and into tonight twd 
those solns. In general, ongoing storms over Iowa and far NE MO shud 
move sewd impacting mainly the nrn portions of the County Warning Area this 
morning. Mdls suggest storms developing this afternoon over the 
ern Ozarks or along the MS rvr, but these shud remain isod. For 
tonight, storms shud remain focused along the fnt and where 850mb 
convergence is greatest. Believe the best chances will remain NE 
of the cwa, but have kept slight chance pops along the nern 
counties due to uncertainty. 


A lot of questions remain regarding temps today due to possible 
convection. However, have trended above the cooler MOS, but stayed 
below the warmer MOS. Overall, this verified fairly well 
yesterday. Temps for tonight are a little more complex as mixing 
shud be greater across central MO. However, have trended above the 
warmer MOS due to swly winds thru the night. 


Long term: (tonight through tuesday) 
issued at 338 am CDT Wed Aug 20 2014 


Focus thru the period will be temps and the ongoing heat 
headlines. 


Much of the questions regarding dewpoints and headlines continues 
thru the weekend as mentioned above and will therefore not dwell 
on the uncertainties here. Dewpoints across the ern Ozarks and 
perhaps into central MO are expected to mix out during the 
afternoon. The rainfall over the past few days shud help drive up 
dewpoints across NE MO and much of SW Illinois. Overall not much change 
to the prev forecast as it appears to be on track. 


The Gem continues to be an outlier especially beyond Sat and have 
therefore trended twd the other guidance. The local WRF and to 
some degree the NAM also trend away from a GFS/European model (ecmwf) compromise 
for Fri and beyond and have therefore trended away from these 
solns as well. 


The main changes from yesterday are how this heat event comes to 
an end. The GFS/European model (ecmwf) now suggest the upper ridge, while weaker, 
will remain in place into tues. However, both mdls prog cooler 
850mb and 700mb temps which shud still result in cooler temps as 
well as an increase in precip chances. These precip chances will 
be mainly afternoon pulse thunderstorms and rain as a S/W approaches the region from 
the southeast. 


&& 


Aviation: (for the 06z tafs through 06z Wednesday night) 
issued at 1110 PM CDT Tue Aug 19 2014 


A weak cold front was draped from central Illinois thru northern MO late 
this evening and was producing very little in the way of clouds 
and only one cell just to the east of uin. This front is expected 
to move thru our region uneventfully for the next few hours and early 
overnight, before stalling out and eventually retreating to the 
north as a warm front late. When this does happen, scattered 
convection is expected to break out along the front as it pushes 
thru the taf sites thru mid Wednesday morning. Have upgraded to 
thunderstorms in the vicinity mention, but southern extent looking a bit more iffy if front 
does not work its way far enough south as originally expected. Some 
fog is also expected, especially at sus and cps, but will be in a 
narrower window than last night due to the expected clouds and 
convection firing along the warm front. VFR conditions are then 
expected for the remainder of the taf period from late Wednesday 
morning on as the entire area moves into a warm sector setup. 
Surface winds will become S-SW as the warm front moves thru. 


Specifics for kstl: VFR conditions outside of rain are expected 
thru the period. A small window early Wednesday morning for rain 
is anticipated as a warm front moves thru. An outside chance for 
some visibility reductions in mist late tonight as well, but small 
enough to preclude mention in the taf at this time. 


Tes 


&& 


Preliminary point temperatures/pops: 
Saint Louis 95 75 96 77 / 30 10 5 10 
Quincy 89 71 93 73 / 60 20 10 10 
Columbia 94 73 96 74 / 20 10 5 10 
Jefferson City 94 73 97 74 / 10 10 5 10 
Salem 90 72 92 73 / 20 20 10 10 
Farmington 94 70 95 72 / 20 10 5 5 


&& 


Lsx watches/warnings/advisories: 
MO...heat advisory from 1 PM this afternoon to 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 from 1 PM this afternoon to 7 PM CDT 
Sunday for St. Louis city MO-St. Louis MO. 


Illinois...heat advisory from 1 PM this afternoon to 7 PM CDT Sunday for 
Bond Illinois-Calhoun Illinois-Clinton Illinois-Greene Illinois-Jersey Illinois-Macoupin 
Illinois-Marion Illinois-Monroe Illinois-Randolph Illinois-Washington Illinois. 


Excessive heat warning from 1 PM this afternoon to 7 PM CDT 
Sunday for Madison IL-St. Clair Illinois. 


&& 


$$ 


Weather forecast office lsx 












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