Arnold, Missouri Weather Conditions

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Current Conditions

  • 54°
  • Overcast
  • Wind: SSE 7 mph
  • Humidity: 83%
  • Visibility: 10.0 miles
  • Dew Point: 49°
  • Pressure: 29.71 in. -

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Next 12 Hours

9  am
12  pm
3  pm
6  pm
9  pm
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Rain
Rain
Rain
Rain
54°
54°
57°
55°
54°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Chance of a Thunderstorm
  • High: 57 °
  • Low: 37 °
  • Chance of T-Storms
  • Monday
  • Chance of Rain
  • High: 43 °
  • Low: 23 °
  • Chance of Rain
  • Tuesday
  • Partly Cloudy
  • High: 39 °
  • Low: 27 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 48 °
  • Low: 30 °
  • Partly Cloudy
  • Thursday
  • Mostly Cloudy
  • High: 46 °
  • Low: 25 °
  • Mostly Cloudy

Forecast for Arnold, Missouri

Updated: 9:00 PM CST on November 22, 2014

  • Sunday

    Overcast with a chance of a thunderstorm and rain showers. High of 57F. Winds from the SE at 10 to 15 mph. Chance of rain 100% with rainfall amounts near 0.6 in. possible.

  • Sunday Night

    Overcast with rain. Low of 37F. Winds from the South at 10 to 15 mph shifting to the West after midnight. Chance of rain 70% with rainfall amounts near 0.6 in. possible.

  • Monday

    Mostly cloudy with a chance of rain. High of 43F. Breezy. Winds from the West at 15 to 20 mph. Chance of rain 20%.

  • Monday Night

    Partly cloudy. Low of 23F. Winds from the West at 10 to 15 mph.

  • Tuesday

    Partly cloudy in the morning, then clear. High of 39F with a windchill as low as 19F. Winds from the West at 5 to 10 mph.

  • Tuesday Night

    Clear in the evening, then partly cloudy. Low of 27F. Winds from the SSW at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High of 48F. Winds from the SSW at 10 to 15 mph.

  • Wednesday Night

    Partly cloudy. Low of 30F. Winds from the SW at 5 to 10 mph.

  • Thursday

    Overcast. Fog early. High of 46F. Breezy. Winds from the WSW at 10 to 20 mph shifting to the NW in the afternoon.

  • Thursday Night

    Overcast. Fog overnight. Low of 25F with a windchill as low as 16F. Winds from the NNE at 5 to 15 mph.

  • Friday

    Mostly cloudy. High of 37F with a windchill as low as 21F. Winds from the ENE at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Low of 25F with a windchill as low as 18F. Winds from the North at 5 to 10 mph.

  • Saturday

    Partly cloudy. High of 43F. Winds from the NE at 5 to 10 mph.

  • Saturday Night

    Partly cloudy with a chance of snow. Low of 34F with a windchill as low as 27F. Winds from the ESE at 10 to 15 mph. Chance of snow 40%.

  • Sunday

    Mostly cloudy with a chance of a thunderstorm. High of 52F. Winds from the South at 5 to 15 mph. Chance of rain 30%.

  • Sunday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 32F. Winds less than 5 mph. Chance of rain 20%.

  • Monday

    Partly cloudy. Fog early. High of 45F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy. Fog overnight. Low of 34F. Winds less than 5 mph.

  • Tuesday

    Mostly cloudy. Fog early. High of 43F. Winds less than 5 mph.

  • Tuesday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 28F. Winds less than 5 mph. Chance of rain 20%.

  • Wednesday

    Clear. Fog early. High of 43F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Fog overnight. Low of 28F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: ARNOLD, Arnold, MO

Updated: 8:10 AM CST

Temperature: 51.4 °F Dew Point: - Humidity: 79% Wind: North at - Pressure: 29.02 in Hourly Precipitation: - Graphs

Location: Arnold, MO

Updated: 8:10 AM CST

Temperature: 51.9 °F Dew Point: 50 °F Humidity: 93% Wind: Calm Pressure: 29.66 in Hourly Precipitation: 0.00 in Graphs

Location: Arnold, Arnold, MO

Updated: 8:14 AM CST

Temperature: 52.1 °F Dew Point: 49 °F Humidity: 90% Wind: SE at 1.0 mph Pressure: 29.66 in Hourly Precipitation: 0.01 in Graphs

Location: summerfield, Imperial, MO

Updated: 8:17 AM CST

Temperature: 50.4 °F Dew Point: 50 °F Humidity: 97% Wind: Calm Pressure: 29.44 in Hourly Precipitation: 0.14 in Graphs

Location: Wynfield Terrace, St. Louis, MO

Updated: 8:17 AM CST

Temperature: 52.0 °F Dew Point: 48 °F Humidity: 86% Wind: ESE at 1.6 mph Pressure: 29.65 in Hourly Precipitation: 0.04 in Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 8:15 AM CST

Temperature: 52.3 °F Dew Point: 50 °F Humidity: 90% Wind: Calm Pressure: 29.71 in Hourly Precipitation: 0.00 in Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 8:17 AM CST

Temperature: 51.9 °F Dew Point: 49 °F Humidity: 91% Wind: ESE at 1.0 mph Pressure: 29.72 in Hourly Precipitation: 0.01 in Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 8:17 AM CST

Temperature: 53.2 °F Dew Point: 51 °F Humidity: 92% Wind: SE at 1.6 mph Pressure: 29.82 in Hourly Precipitation: 0.05 in Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 8:17 AM CST

Temperature: 52.4 °F Dew Point: 50 °F Humidity: 92% Wind: SE at 3.0 mph Pressure: 29.68 in Hourly Precipitation: 0.01 in Graphs

Location: Christopher Winds, Oakville, MO

Updated: 8:17 AM CST

Temperature: 52.3 °F Dew Point: 50 °F Humidity: 92% Wind: SE at 3.0 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 8:17 AM CST

Temperature: 52.1 °F Dew Point: 50 °F Humidity: 93% Wind: Calm Pressure: 29.59 in Hourly Precipitation: 0.01 in Graphs

Location: San Luis Trails, Fenton, MO

Updated: 8:17 AM CST

Temperature: 52.3 °F Dew Point: 48 °F Humidity: 85% Wind: East at 1.0 mph Pressure: 29.60 in Hourly Precipitation: 0.00 in Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 8:17 AM CST

Temperature: 51.1 °F Dew Point: 48 °F Humidity: 89% Wind: SSE at 6.1 mph Pressure: 29.72 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 8:09 AM CST

Temperature: 55.5 °F Dew Point: 52 °F Humidity: 89% Wind: SSE at 9.0 mph Pressure: 29.65 in Hourly Precipitation: 0.00 in Graphs

Location: St. Louis, MO

Updated: 8:17 AM CST

Temperature: 53.3 °F Dew Point: 50 °F Humidity: 89% Wind: ENE at 1.0 mph Pressure: 29.58 in Hourly Precipitation: 0.00 in Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 8:17 AM CST

Temperature: 52.0 °F Dew Point: 49 °F Humidity: 90% Wind: Calm Pressure: 29.65 in Hourly Precipitation: 0.00 in Graphs

Location: Chesapeake on the Bluff, Columbia, IL

Updated: 8:16 AM CST

Temperature: 52.5 °F Dew Point: 50 °F Humidity: 90% Wind: ENE at 1.6 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Graphs

Location: Sunset Hills, St Louis, MO

Updated: 8:16 AM CST

Temperature: 53.6 °F Dew Point: 51 °F Humidity: 89% Wind: WSW at 3.0 mph Pressure: 29.67 in Hourly Precipitation: - Graphs

Location: Crestwood, Crestwood, MO

Updated: 8:14 AM CST

Temperature: 50.9 °F Dew Point: 47 °F Humidity: 87% Wind: ESE at 2.2 mph Pressure: 29.42 in Hourly Precipitation: - Graphs

Location: South County, Affton, MO

Updated: 8:17 AM CST

Temperature: 52.2 °F Dew Point: 50 °F Humidity: 94% Wind: SSE at 1.0 mph Pressure: 29.60 in Hourly Precipitation: 0.01 in Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 8:17 AM CST

Temperature: 54.5 °F Dew Point: 52 °F Humidity: 91% Wind: SE at 11.4 mph Pressure: 29.75 in Hourly Precipitation: 0.01 in Graphs

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

Updated: 8:15 AM CST

Temperature: 52.9 °F Dew Point: 43 °F Humidity: 70% Wind: ESE at 2.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Graphs

Location: Gedern Village, Columbia, IL

Updated: 8:17 AM CST

Temperature: 53.6 °F Dew Point: 51 °F Humidity: 90% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 8:08 AM CST

Temperature: 53.2 °F Dew Point: 50 °F Humidity: 88% Wind: East at 1.1 mph Pressure: 29.68 in Hourly Precipitation: - Graphs

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

Updated: 8:17 AM CST

Temperature: 51.4 °F Dew Point: 49 °F Humidity: 90% Wind: Calm Pressure: 29.71 in Hourly Precipitation: 0.00 in Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 8:17 AM CST

Temperature: 52.9 °F Dew Point: 51 °F Humidity: 92% Wind: SSE at 1.0 mph Pressure: 29.61 in Hourly Precipitation: 0.00 in Graphs

Location: BROADWAY (South), St. Louis, MO

Updated: 8:10 AM CST

Temperature: 51.4 °F Dew Point: - Humidity: 79% Wind: North at - Pressure: 29.10 in Hourly Precipitation: - Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 8:16 AM CST

Temperature: 51.6 °F Dew Point: 48 °F Humidity: 88% Wind: Calm Pressure: 29.49 in Hourly Precipitation: - Graphs

Location: Twin Oaks, Twin Oaks, MO

Updated: 8:14 AM CST

Temperature: 51.6 °F Dew Point: 50 °F Humidity: 96% Wind: SE at 3.7 mph Pressure: 29.56 in Hourly Precipitation: - Graphs

Location: Herculaneum, Mott Street, Herculaneum, MO

Updated: 8:10 AM CST

Temperature: 51.1 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.30 in Hourly Precipitation: - Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 8:15 AM CST

Temperature: 51.7 °F Dew Point: 49 °F Humidity: 90% Wind: ESE at 5.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Graphs

Location: Manchester, MO, Manchester, MO

Updated: 8:12 AM CST

Temperature: 51.6 °F Dew Point: 49 °F Humidity: 89% Wind: Calm Pressure: 29.70 in Hourly Precipitation: 0.00 in Graphs

Location: Arbor Valley, Ballwin, MO

Updated: 8:16 AM CST

Temperature: 51.6 °F Dew Point: 48 °F Humidity: 89% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in 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 
628 am CST sun Nov 23 2014 


Short term: (through late this afternoon) 
issued at 331 am CST sun Nov 23 2014 


Surface low to begin lifting northeastward towards forecast area 
today. Will see showers on the increase this morning and spread 
north across the region. Some instability today so there is a chance 
of thunderstorms mainly along and south of I-70. As for 
temperatures, will depend on cloud cover and rainfall. But feel that 
temps will rise into the mid 50s to low 60s by this afternoon. 


Byrd 


Long term: (tonight through saturday) 
issued at 331 am CST sun Nov 23 2014 


(tonight-wednesday) 


While specific precip trends are certainly tricky tonight and into 
Monday, latest synoptic and hi-res guidance suggests the general 
scenario will be that this afternoon's band of rain and embedded 
thunderstorms will rotate east out of the area this evening, as 
additional precip begins to form to our west as secondary shortwave 
drops south in the wake of today's system. This secondary area of 
precip should then wind down to spotty areas of light rain/light 
snow during the day on Monday. 


Yesterday's guidance as well as 00z model output is now suggesting 
more precip lingering in the cold air late tonight and early Monday 
than was indicated by earlier runs. I have not made any major 
changes to the timing of the changeover from rain to snow over the 
northwest half of the County Warning Area in the 06-12z time frame; this may be a 
bit too fast, but didn't want to discount the intensity of the 
cold air advection. In the far northwest counties, it appears that this strong cold air advection will 
cause freezing levels to drop enough to support the rain changing 
over to all snow for a few hours late tonight and into early 
Monday morning, and based on this have added some minor accumulations 
of under an inch in our extreme northwest counties. 


Min/Max temps for tonight/Monday will be based on non-diurnal, 3 
hourly temp trends during this time frame. 


No major changes in going forecast trends heading into midweek, with 
dry and chlly weather on Tuesday followed by a brief warmup and low 
pops for the fast-moving, moisture-starved system on Wednesday. 


(Thursday-saturday) 


Medium range guidance has come into better agreement with a less 
amplified solution for Thanksgiving day, suggesting a ribbon of 
light precip over northern sections of the County Warning Area as shortwave 
interacts with baroclinicity that is draped across the region. 
Pattern suggests that there should be a strong temperature 
gradient from north to south across the region, with highs in the 
30s over the cold air in the north while approaching 50 in the 
warmer air over southern sections of the County Warning Area. 


This agreement jumps the tracks heading into the latter half of the 
week, with Gem and European model (ecmwf) forecasting broad trofing over the central 
Continental U.S. While the GFS maintains a more quasi-zonal look. Of course, 
given the intensity of the baroclinic zone this somewhat subtle 
difference will make a huge impact on sensible weather trends, and 
especially on temperatures. This discrepency can be seen in the 
surface prog forecasts for Friday morning; European model (ecmwf) and Gem have broad 
and cold Canadian high over the plains and into the upper 
Mississippi Valley with north/northeast winds over our fa, while GFS 
as surface low over the northern plains and southerly winds over our 
area. MOS guidance based on these solutions offer a more 
quanitative and Stark measure of this discrepency...a whopping 
20-25 degree difference on friday's highs between the colder 
European model (ecmwf) and warmer GFS. For now have maintained earlier (colder) 
trends, based on consensus of Gem and ecmef. 


Truett 
&& 


Aviation: (for the 12z tafs through 12z Monday morning) 
issued at 628 am CST sun Nov 23 2014 


Next round of showers continuing to develop and slide northward 
through forecast area and persist through most of forecast period. 
Cigs to lower to MVFR by mid morning, then down to IFR. In the 
meantime, winds to persist from the southeast to south today. As 
surface low lifts through region, cold front associated with it to 
slide through area tonight. Front to move through kcou by 03z 
Monday, KUIN by 04z Monday and Metro area tafs by 07z Monday. 
Winds to veer to the west behind from and become gusty at times. 
Colder air will filter on back side of system with rain becoming 
mixed with snow after midnight tonight. 


Specifics for kstl: 
next round of showers continuing to develop and slide northward 
moving into the Metro area by 14z and persist through most of 
forecast period. Cigs to lower to MVFR by 14z, then down to IFR by 20z. 
In the meantime, winds to persist from the south today. As 
surface low lifts through region, cold front associated with it to 
slide Metro area by 07z Monday. Winds to veer to the west behind 
from and become gusty at times. Colder air will filter on back 
side of system with rain becoming mixed with snow after 13z 
Monday. 


Byrd 
&& 


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


$$ 
Weather forecast office lsx 










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