Herculaneum, Missouri Weather Conditions

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Current Conditions

  • 52°
  • Mostly Cloudy
  • Wind: SSE 9 mph
  • Humidity: 71%
  • Visibility: 10.0 miles
  • Dew Point: 43°
  • Pressure: 29.81 in. -

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Next 12 Hours

3  am
6  am
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12  pm
3  pm
Rain Showers
Rain Showers
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
50°
48°
54°
54°
57°
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 Herculaneum, 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: Herculaneum, Mott Street, Herculaneum, MO

Updated: 3:20 AM CST

Temperature: 53.8 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.39 in Hourly Precipitation: - Windchill: - Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 3:22 AM CST

Temperature: 50.5 °F Dew Point: 44 °F Humidity: 78% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: summerfield, Imperial, MO

Updated: 3:22 AM CST

Temperature: 49.5 °F Dew Point: 46 °F Humidity: 86% Wind: Calm Pressure: 29.52 in Hourly Precipitation: 0.00 in Windchill: 50 °F Graphs

Location: Chesapeake on the Bluff, Columbia, IL

Updated: 3:22 AM CST

Temperature: 51.4 °F Dew Point: 45 °F Humidity: 79% Wind: ESE at 2.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Wynfield Terrace, St. Louis, MO

Updated: 3:22 AM CST

Temperature: 50.4 °F Dew Point: 42 °F Humidity: 73% Wind: ESE at 2.5 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Arnold, MO

Updated: 3:09 AM CST

Temperature: 52.7 °F Dew Point: 47 °F Humidity: 81% Wind: SSE at 4.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Arnold, Arnold, MO

Updated: 3:14 AM CST

Temperature: 51.7 °F Dew Point: 45 °F Humidity: 78% Wind: East at 2.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: ARNOLD, Arnold, MO

Updated: 3:20 AM CST

Temperature: 52.9 °F Dew Point: - Humidity: 66% Wind: North at - Pressure: 29.11 in Hourly Precipitation: - Windchill: - Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 3:22 AM CST

Temperature: 51.3 °F Dew Point: 44 °F Humidity: 76% Wind: SE at 2.5 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Christopher Winds, Oakville, MO

Updated: 3:22 AM CST

Temperature: 50.3 °F Dew Point: 45 °F Humidity: 82% Wind: SE at 2.0 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 3:22 AM CST

Temperature: 51.4 °F Dew Point: 46 °F Humidity: 80% Wind: SSE at 2.0 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Hardy Acres / AA9UC, Waterloo, IL

Updated: 3:21 AM CST

Temperature: 48.7 °F Dew Point: 37 °F Humidity: 64% Wind: ESE at 2.4 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Windchill: 49 °F Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 3:22 AM CST

Temperature: 51.2 °F Dew Point: 46 °F Humidity: 81% Wind: SE at 3.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 3:20 AM CST

Temperature: 52.1 °F Dew Point: 45 °F Humidity: 78% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Ste Genevieve county, Festus, MO

Updated: 3:21 AM CST

Temperature: 52.8 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 3:22 AM CST

Temperature: 52.3 °F Dew Point: 45 °F Humidity: 77% Wind: SE at 3.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 3:22 AM CST

Temperature: 54.5 °F Dew Point: 46 °F Humidity: 72% Wind: SSE at 6.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Devall's Backyard, Waterloo, IL

Updated: 3:12 AM CST

Temperature: 50.7 °F Dew Point: 43 °F Humidity: 75% Wind: North at 1.7 mph Pressure: 29.82 in Hourly Precipitation: - Windchill: - Graphs

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

Updated: 3:09 AM CST

Temperature: 55.8 °F Dew Point: 47 °F Humidity: 73% Wind: South at 13.0 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Gedern Village, Columbia, IL

Updated: 3:22 AM CST

Temperature: 50.9 °F Dew Point: 44 °F Humidity: 78% Wind: East at 1.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 3:22 AM CST

Temperature: 51.4 °F Dew Point: 43 °F Humidity: 74% Wind: SSE at 4.3 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: San Luis Trails, Fenton, MO

Updated: 3:22 AM CST

Temperature: 53.6 °F Dew Point: 44 °F Humidity: 70% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 3:22 AM CST

Temperature: 53.4 °F Dew Point: 47 °F Humidity: 78% Wind: Calm Pressure: 29.73 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: St. Joseph Hill, Pacific, MO

Updated: 3:19 AM CST

Temperature: 53.4 °F Dew Point: 47 °F Humidity: 79% Wind: SSW at 1.0 mph Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: St. Louis, MO

Updated: 3:22 AM CST

Temperature: 53.5 °F Dew Point: 46 °F Humidity: 77% Wind: ENE at 1.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 3:22 AM CST

Temperature: 43.0 °F Dew Point: 40 °F Humidity: 91% Wind: North at 2.2 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: South County, Affton, MO

Updated: 3:22 AM CST

Temperature: 52.9 °F Dew Point: 47 °F Humidity: 81% Wind: Calm Pressure: 29.67 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 3:20 AM CST

Temperature: 51.1 °F Dew Point: - Humidity: 72% Wind: North at - Pressure: 29.20 in Hourly Precipitation: - Windchill: - Graphs

Location: Sunset Hills, St Louis, MO

Updated: 3:15 AM CST

Temperature: 53.7 °F Dew Point: 47 °F Humidity: 77% Wind: Calm Pressure: 29.76 in Hourly Precipitation: - Windchill: - Graphs

Location: Crestwood, Crestwood, MO

Updated: 3:10 AM CST

Temperature: 53.1 °F Dew Point: 46 °F Humidity: 77% Wind: ESE at 2.2 mph Pressure: 29.51 in Hourly Precipitation: - Windchill: - Graphs

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

Updated: 1:50 AM CST

Temperature: 46 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

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

Updated: 3:20 AM CST

Temperature: 53.1 °F Dew Point: 46 °F Humidity: 76% Wind: East at 1.0 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest EURKA1 MO US UPR, Wildwood, MO

Updated: 2:00 AM CST

Temperature: 52 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Millstadt, Millstadt, IL

Updated: 3:22 AM CST

Temperature: 49.5 °F Dew Point: 36 °F Humidity: 59% Wind: South at 10.4 mph Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: 45 °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 
1207 am CST sun Nov 23 2014 


Update: 
issued at 639 PM CST Sat Nov 22 2014 


Have made some refinements to the probability of precipitation tonight into early Sunday 
morning. The main axis of rain/showers this evening will reside 
across southeast MO across southwest and south central Illinois within 
the warm moist conveyor belt and ahead of a subtle impulse in the 
southwest flow aloft. Further north and northwest across northeast 
and central MO the chance of precipitation appears rather low 
given the lack of any forcing, and if any occurs it will likely be 
isolated or in the form of sprinkles or drizzle. The precipitation 
threat will ramp up overnight however in central and northeast MO, 
especially after 08-09z with large scale ascent associated with a 
shortwave currently over Texas moves northeastward into the area and 
low level flow backs refocusing the lift westward. Lift and 
showers/rain associated with this wave will overspread the entire 
area early-mid Sunday morning. 


Glass 


&& 


Short term: (through late tonight) 
issued at 347 PM CST Sat Nov 22 2014 


Scattered showers are already moving across the southern half the 
County Warning Area this afternoon in an area of modest 925-850mb moisture 
convergence ahead of the trough currently over the southern High 
Plains. Expect rain to become more widespread late this afternoon 
into the early evening hours over the southern two thirds of the County Warning Area 
as the showers currently over southwest Missouri continue to move 
northeast into the area. This is being forced by an area of 
stronger low level moisture convergence that the hrrr shows moving 
across the area between 22-03z. While there will still continue to 
be scattered showers elsewhere behind this area through late 
evening, it still appears that better chances for more widespread 
rain will move in from the west after midnight. By that time, large 
scale ascent and moisture convergence will be increasing ahead of the 
aforementioned Southern Plains trough that will be ejecting 
northeastward ahead of longwave trough. With clouds and warm air 
advection tonight, stayed with lows that were close to going 
temperatures and MOS guidance. 


Britt 


Long term: (sunday through next saturday) 
issued at 347 PM CST Sat Nov 22 2014 


Rain and a few thunderstorms are expected on Sunday as a southern 
stream, negatively tilted shortwave moves from eastern Texas 
northeastward into the Tennessee and Ohio Valley regions, while a northern 
stream upper level trough/low moves slowly east southeastward 
through the northern plains. The models were depicting upper level 
divergence over our area between a strong upper level jet streak 
across the Southern Plains and a weaker upper level jet streak over 
the Great Lakes region. The models have some discrepencies as to 
the exact track of the deepening surface low, but at this time it 
appears that it will move northeastward through or just north of the 
stl area around 00z Monday. There will be ample instability for at 
least isolated thunderstorms on Sunday into Sunday evening, 
especially across southeast MO and southwest Illinois. Strong low level 
cold air advection can be expected Sunday night after the passage of 
the low and trailing cold front. The threat for precipitation will 
continue Sunday night as shortwaves rotate through our area south of 
the main upper level low/trough over the northern plains. As the 
colder air filters southeastward into the region the rain may change 
over to light snow before ending late Sunday night/early Monday 
morning across portions of northeast and central MO as well as west 
central Illinois. Most of the precipitation will shift east of our 
forecast area by Monday, although there may be some lingering light 
snow or flurries mainly across west central Illinois. Much colder 
temperatures can be expected for Monday, with nearly steady 
temperatures, mainly in the middle 30s to lower 40s as the NAM and 
European model (ecmwf) models drop the -8 degree c 850 mb isotherm southward to stl. 
The GFS model is even colder and quicker bringing the colder air 
southeastward into our forecast area. An unseasonably cold period 
is expected through Tuesday night as a large amplitude positively 
tilted upper level trough moves eastward through the central US. 
The GFS and European model (ecmwf) models are still hinting at the possibility of a 
northwest flow shortwave and associated weak surface low to bring a 
quick shot of rain/snow to our area late Tuesday night and 
Wednesday. The models, particularly the GFS are not as cold for 
Thanksgiving day with the coldest air remaining just north of our 
forecast area, although a strong surface ridge is still forecast to 
build southeastward into the region from the northern plains on 
Thanksgiving. 


Gks 


&& 


Aviation: (for the 06z tafs through 06z Sunday night) 
issued at 1136 PM CST Sat Nov 22 2014 


Specifics for kcou, kuin: an approaching low pressure system will 
bring widespread rainfall and IFR conditions to the area on 
Sunday. Winds will become northwesterly behind a cold front 
towards the end of the 24-hr taf period at KUIN. Just beyond the 
end of the taf period, a brief period of light snow is possible 
while precipitation is ending. 


Specifics for kstl, ksus, kcps: despite several hours of 
persistent light rainfall at night along with steadily increasing 
surface dew points, ceilings have remained predominantly VFR at 
the St. Louis Metro area taf sites over the last 6 hours. Most 
perplexing. In any event, confidence in cig/vis trends is lower 
during the first 0-6 hours of the taf period compared to later, 
when a strong low pressure system will bring widespread rainfall 
and IFR conditions to the area. Conditions will deteriorate with 
time, especially after 10-12z. Winds will become westerly to 
northwesterly and increase behind a cold front towards the end of 
the 30-hr taf period. 


Kanofsky 


&& 


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


$$ 


Weather forecast office lsx 



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