Arnold, Missouri Weather Conditions

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Current Conditions

  • 42°
  • Clear
  • Wind: SSE 17 mph
  • Humidity: 62%
  • Visibility: 10.0 miles
  • Dew Point: 30°
  • Pressure: 30.19 in. -
  • Heat Index: 34

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Next 12 Hours

12  pm
3  pm
6  pm
9  pm
12  am
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
43°
48°
46°
46°
46°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 50 °
  • Low: 41 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 48 °
  • Low: 30 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 43 °
  • Low: 28 °
  • Partly Cloudy
  • Saturday
  • Clear
  • High: 45 °
  • Low: 34 °
  • Clear
  • Sunday
  • Chance of Snow
  • High: 41 °
  • Low: 12 °
  • Chance of Snow

Forecast for Arnold, Missouri

Updated: 9:00 AM CST on January 28, 2015

  • Wednesday

    Clear. High of 50F. Breezy. Winds from the SSE at 10 to 20 mph.

  • Wednesday Night

    Partly cloudy. Low of 41F. Winds from the South at 10 to 15 mph.

  • Thursday

    Mostly cloudy in the morning, then overcast. High of 48F. Breezy. Winds from the NW at 15 to 20 mph with gusts to 30 mph.

  • Thursday Night

    Partly cloudy. Low of 30F with a windchill as low as 23F. Winds from the NNW at 10 to 15 mph.

  • Friday

    Clear in the morning, then partly cloudy. High of 43F. Winds from the North at 5 to 10 mph.

  • Friday Night

    Partly cloudy in the evening, then overcast. Low of 28F. Winds from the ENE at 5 to 10 mph shifting to the SE after midnight.

  • Saturday

    Clear. High of 45F. Winds from the South at 10 to 15 mph.

  • Saturday Night

    Mostly cloudy with a chance of snow and a chance of rain in the evening, then overcast with a chance of rain. Low of 34F with a windchill as low as 28F. Winds from the SSE at 5 to 10 mph. Chance of precipitation 50% .

  • Sunday

    Overcast with a chance of snow and a chance of rain. High of 41F. Winds from the ESE at 5 to 10 mph. Chance of snow 50%.

  • Sunday Night

    Partly cloudy with a chance of snow. Low of 12F. Breezy. Winds from the NNW at 10 to 30 mph. Chance of snow 60% with accumulations up to 1 in. possible.

  • Monday

    Clear. High of 28F with a windchill as low as -6F. Windy. Winds from the NW at 20 to 30 mph.

  • Monday Night

    Partly cloudy. Low of 12F with a windchill as low as 0F. Winds from the NW at 5 to 15 mph.

  • Tuesday

    Clear. High of 32F. Winds from the NE at 5 to 10 mph shifting to the SSE in the afternoon.

  • Tuesday Night

    Partly cloudy. Low of 19F with a windchill as low as 10F. Winds from the SE at 10 to 15 mph.

  • Wednesday

    Partly cloudy with a chance of snow. High of 34F with a windchill as low as 9F. Winds from the South at 10 to 15 mph. Chance of snow 40%.

  • Wednesday Night

    Clear. Fog overnight. Low of 19F. Winds from the WNW at 5 to 10 mph.

  • Thursday

    Clear. Fog early. High of 36F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 16F. Winds less than 5 mph.

  • Friday

    Clear. High of 36F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 18F. Winds less than 5 mph.

  • Saturday

    Clear. High of 37F. Winds less than 5 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 18F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Guardian Court, Arnold, MO

Updated: 12:05 PM CST

Temperature: 41.4 °F Dew Point: 34 °F Humidity: 75% Wind: North at - Pressure: 30.12 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Arnold # 1, Arnold, MO

Updated: 12:05 PM CST

Temperature: 42.8 °F Dew Point: 30 °F Humidity: 60% Wind: ESE at 11.9 mph Pressure: 29.84 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: ARNOLD, Arnold, MO

Updated: 11:50 AM CST

Temperature: 36.5 °F Dew Point: - Humidity: 67% Wind: North at - Pressure: 29.49 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: APRSWXNET Arnold MO US, Arnold, MO

Updated: 11:23 AM CST

Temperature: 40 °F Dew Point: 33 °F Humidity: 76% Wind: SE at 2 mph Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Arnold, MO

Updated: 12:09 PM CST

Temperature: 42.7 °F Dew Point: 34 °F Humidity: 71% Wind: East at 6.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: APRSWXNET Arnold MO US, Sulphur Springs, MO

Updated: 11:24 AM CST

Temperature: 41 °F Dew Point: 31 °F Humidity: 68% Wind: East at 7 mph Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Arnold, Arnold, MO

Updated: 12:09 PM CST

Temperature: 43.5 °F Dew Point: 32 °F Humidity: 64% Wind: SSE at 5.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: summerfield, Imperial, MO

Updated: 12:10 PM CST

Temperature: 44.6 °F Dew Point: 24 °F Humidity: 43% Wind: SSW at 4.3 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 12:10 PM CST

Temperature: 44.2 °F Dew Point: 32 °F Humidity: 63% Wind: SE at 3.0 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 12:10 PM CST

Temperature: 42.8 °F Dew Point: 32 °F Humidity: 66% Wind: East at 13.0 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: APRSWXNET St. Louis MO US, Saint Louis, MO

Updated: 11:30 AM CST

Temperature: 40 °F Dew Point: 31 °F Humidity: 71% Wind: ESE at 9 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: APRSWXNET Imperial MO US, Imperial, MO

Updated: 11:34 AM CST

Temperature: 44 °F Dew Point: 34 °F Humidity: 68% Wind: South at 2 mph Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Imperial - Wellington Subdivision, Imperial, MO

Updated: 12:10 PM CST

Temperature: 46.2 °F Dew Point: 35 °F Humidity: 65% Wind: SSE at 6.9 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 12:10 PM CST

Temperature: 48.2 °F Dew Point: 27 °F Humidity: 43% Wind: SSE at 3.1 mph Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 12:10 PM CST

Temperature: 43.6 °F Dew Point: 34 °F Humidity: 68% Wind: SSE at 8.0 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: APRSWXNET Oakville MO US, Saint Louis, MO

Updated: 11:25 AM CST

Temperature: 41 °F Dew Point: 33 °F Humidity: 73% Wind: SSE at 7 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Christopher Winds, Oakville, MO

Updated: 12:10 PM CST

Temperature: 43.2 °F Dew Point: 33 °F Humidity: 66% Wind: SSE at 8.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Cathedral Drive, Saint Louis, MO

Updated: 12:05 PM CST

Temperature: 41.4 °F Dew Point: 33 °F Humidity: 72% Wind: North at - Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 12:10 PM CST

Temperature: 44.9 °F Dew Point: 32 °F Humidity: 59% Wind: ESE at 5.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: San Luis Trails, Fenton, MO

Updated: 12:10 PM CST

Temperature: 43.5 °F Dew Point: 28 °F Humidity: 55% Wind: SSE at 2.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 12:10 PM CST

Temperature: 42.4 °F Dew Point: 31 °F Humidity: 64% Wind: SE at 7.9 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: APRSWXNET Sappington MO US, Saint Louis, MO

Updated: 11:30 AM CST

Temperature: 41 °F Dew Point: 32 °F Humidity: 71% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

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

Updated: 11:58 AM CST

Temperature: 45.1 °F Dew Point: 32 °F Humidity: 61% Wind: SSE at 16.0 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: St. Louis, MO

Updated: 12:10 PM CST

Temperature: 43.3 °F Dew Point: 32 °F Humidity: 65% Wind: NNW at 5.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: APRSWXNET Fenton MO US, Fenton, MO

Updated: 11:32 AM CST

Temperature: 43 °F Dew Point: 32 °F Humidity: 66% Wind: SW at 1 mph Pressure: 30.21 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: BUCKLEY MEADOWS 4, Saint Louis, MO

Updated: 12:09 PM CST

Temperature: 43.5 °F Dew Point: 31 °F Humidity: 62% Wind: NNE at 8.9 mph Pressure: 30.04 in Hourly Precipitation: - Windchill: 38 °F Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 12:10 PM CST

Temperature: 44.5 °F Dew Point: 33 °F Humidity: 63% Wind: SE at 5.0 mph Pressure: 30.12 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Bent Tree Trails, Fenton, MO

Updated: 12:01 PM CST

Temperature: 44.4 °F Dew Point: 30 °F Humidity: 57% Wind: SW at 6.7 mph Pressure: 29.83 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Chesapeake on the Bluff, Columbia, IL

Updated: 12:10 PM CST

Temperature: 44.2 °F Dew Point: 30 °F Humidity: 56% Wind: ENE at 8.1 mph Pressure: 29.50 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: APRSWXNET Sunset Hills MO US, Saint Louis, MO

Updated: 11:27 AM CST

Temperature: 40 °F Dew Point: 31 °F Humidity: 70% Wind: SSE at 4 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Crestwood, Crestwood, MO

Updated: 12:01 PM CST

Temperature: 44.4 °F Dew Point: 33 °F Humidity: 65% Wind: ESE at 8.9 mph Pressure: 29.86 in Hourly Precipitation: - Windchill: 40 °F Graphs

Location: South County, Affton, MO

Updated: 12:10 PM CST

Temperature: 38.7 °F Dew Point: 29 °F Humidity: 68% Wind: SSE at 9.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: APRSWXNET Affton MO US, Saint Louis, MO

Updated: 11:18 AM CST

Temperature: 36 °F Dew Point: 29 °F Humidity: 74% Wind: SSE at 7 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: APRSWXNET Byrnes Mill MO US, Liguori, MO

Updated: 11:29 AM CST

Temperature: 43 °F Dew Point: 27 °F Humidity: 53% Wind: SSE at 4 mph Pressure: 30.21 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 12:10 PM CST

Temperature: 45.7 °F Dew Point: 28 °F Humidity: 50% Wind: South at 14.5 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

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

Updated: 12:10 PM CST

Temperature: 42.8 °F Dew Point: 32 °F Humidity: 65% Wind: SE at 6.0 mph Pressure: 30.12 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: Gedern Village, Columbia, IL

Updated: 12:07 PM CST

Temperature: 43.5 °F Dew Point: 32 °F Humidity: 65% Wind: ENE at 4.0 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Sweetbriar Lane, Kirkwood, MO

Updated: 12:06 PM CST

Temperature: 40.6 °F Dew Point: 31 °F Humidity: 69% Wind: North at - Pressure: 30.01 in Hourly Precipitation: - Windchill: 41 °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 
1145 am CST Wed Jan 28 2015 


Short term: (through late this afternoon) 
issued at 339 am CST Wed Jan 28 2015 


Satellite data at 08z showed the area of low clouds that had been 
across west-central Illinois had moved off to the north, propelled by low 
level flow from the se, leaving behind clear skies across the entire 
forecast area. Temps were in the 20s for most areas save central MO 
where readings were in the low 30s. A surface warm front extended 
from southern NE to northeastern OK. Northwest flow prevailed aloft with 
an upper level ridge over the plains. 


The surface warm front is expected to make steady progress today 
into central MO by late afternoon. While moisture levels in the 
atmospheric column are expected to rise to above average levels, the 
lack of any real deep lift other than from the front will preclude 
any pcpn development thru early this evening. In fact, clouds are 
expected to be rather thin for much of the day until late, allowing 
plenty of sunshine. 


The high levels of sunshine and what should be a Stout southerly 
surface flow will allow temps to surge today, especially in central 
MO where the surface warm front is expected to reach. MOS temps 
have been consistently on the cool side for similar scenarios this 
year. Forecasted values that were around the warmer mav MOS for IL, 
yielding 45-50f for maxes, and went up to a few degrees above the 
mav MOS for MO, yielding low 50s near the MS river to the low 60s in 
central MO. 


Tes 


Long term: (tonight through tuesday) 
issued at 339 am CST Wed Jan 28 2015 


(tonight through friday) 


With little precip expected thru the period, focus remains on temps. 


Mdls are in very good agreement thru the period with respect to mass 
fields and thermal profiles. Still, spread among MOS temps increases 
thru the period, tho is less than usual. Have trended twd the warmer 
guidance for tonight as clouds shud help keep temps warmer. Trended 
twd a compromise thru the remainder of the period as cloud cover and 
cold air advection will oppose one another, increasing uncertainty. 


Continued low pops for nern/ern portions of the County Warning Area for tonight and 
thurs morning as the clipper pushes thru the area. 


(Saturday through tuesday) 


Focus quickly turns to the system approaching the region this 
weekend. Mdls are in remarkably good agreement thru the end of the 
storm on Mon. Overall, mdls are rather consistent compared to 24 hrs 
ago. However, the European model (ecmwf) is slightly less amplified and slightly 
warmer while the GFS suggests a deeper trof and overall cooler. The 
Gem is further nwd with the 850 mb track compared to the other 
solns. 


Increased pops for late Sat thru sun as mdls continue to suggest 
precip thru this time and precip is expected. However, a fair amount 
of uncertainty remains regarding p-type thru this storm. Still, it 
shud remain largely a rain vs. Snow system. With the uncertainty in the 
thermal profile, only minor changes were made to p-types for this 
system. This storm will remain one to monitor. 


Beyond this storm, much colder air filters into the region as the 
Arctic sfc ridge builds into the area. Have trended slightly cooler. 
Any snow pack from the preceding system may drive temps even cooler 
than forecast. Will continue with an overall compromise for now. 


Tilly 


&& 


Aviation: (for the 18z tafs through 18z Thursday afternoon) 
issued at 1137 am CST Wed Jan 28 2015 


VFR flight conditions are expected through this evening with winds 
being the main issue. A tight pressure gradient ahead of an 
approaching surface low and cold front will result in gusty 
southeast winds this afternoon, which should diminish around or 
just after sunset. Decoupling of the lower atmosphere after sunset 
and the development of a Stout south-southwesterly low level jet will 
result in low level wind shear conditions for much of the evening and into the 
overnight hours until the cold fropa. The cold front will move 
through the taf sites from northwest to southeast in the 08-12z 
time frame accompanied by gusty northwest winds and MVFR flight 
conditions. 




Specifics for kstl: 


VFR flight conditions will persist this afternoon and evening with 
gusty southeast winds into the early evening. The surface wind 
will diminish during the evening and this will result in the onset 
of low level wind shear as a Stout south-southwest low level jet evolves. A strong cold 
front will then move through the terminal in the 11-12z time frame 
accompanied by gusty northwest winds and MVFR flight conditions. 


Glass 


&& 


Lsx watches/warnings/advisories: 
MO...none. 
Illinois...none. 
&& 


$$ 


Weather forecast office lsx 



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