Herculaneum, Missouri Weather Conditions

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Current Conditions

  • 67°
  • Clear
  • Wind: SE 5 mph
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 54°
  • Pressure: 30.12 in. 0

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Next 12 Hours

2  am
5  am
8  am
11  am
2  pm
Overcast
Overcast
Overcast
Overcast
Chance of Rain
Chance of Rain
Mostly Cloudy
Mostly Cloudy
Overcast
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64°
63°
68°
76°
79°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Chance of a Thunderstorm
  • High: 83 °
  • Low: 68 °
  • Chance of T-Storms
  • Monday
  • Overcast
  • High: 80 °
  • Low: 68 °
  • Overcast
  • Tuesday
  • Chance of Rain
  • High: 76 °
  • Low: 65 °
  • Chance of Rain
  • Wednesday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 65 °
  • Chance of T-Storms
  • Thursday
  • Partly Cloudy
  • High: 87 °
  • Low: 68 °
  • Partly Cloudy

Forecast for Herculaneum, Missouri

Updated: 10:02 PM CDT on January 23, 2015

  • Sunday

    Cloudy in the morning with scattered thunderstorms developing later in the day. High 83F. Winds SSE at 10 to 20 mph. Chance of rain 40%.

  • Sunday Night

    Scattered thunderstorms during the evening becoming more widespread overnight. Low 68F. Winds SSE at 10 to 20 mph. Chance of rain 80%.

  • Monday

    Cloudy. A stray thunderstorm is possible. High near 80F. Winds SSW at 10 to 20 mph.

  • Monday Night

    Cloudy skies with showers and a possible thunderstorm after midnight. Low 68F. Winds S at 10 to 15 mph. Chance of rain 70%.

  • Tuesday

    Variable clouds with showers and scattered thunderstorms. High 76F. Winds S at 10 to 20 mph. Chance of rain 70%.

  • Tuesday Night

    Thunderstorms likely in the evening. Then the chance of scattered thunderstorms later on. Low near 65F. Winds SSW at 5 to 10 mph. Chance of rain 80%.

  • Wednesday

    Variable clouds with scattered thunderstorms. High 84F. Winds WSW at 5 to 10 mph. Chance of rain 50%.

  • Wednesday Night

    Partly cloudy skies. Low near 65F. Winds light and variable.

  • Thursday

    Intervals of clouds and sunshine. High 87F. Winds S at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Low 68F. Winds S at 5 to 10 mph.

  • Friday

    Widely scattered showers or a thunderstorm early. Then partly cloudy. High 88F. Winds S at 5 to 10 mph. Chance of rain 30%.

  • Friday Night

    Partly cloudy with late night showers or thunderstorms. Low 69F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Saturday

    Mixed clouds and sun with scattered thunderstorms. High 81F. Winds SSW at 5 to 10 mph. Chance of rain 50%.

  • Saturday Night

    Scattered thunderstorms in the evening, then variable clouds overnight with more showers at times. Low near 65F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Sunday

    Considerable cloudiness with occasional rain showers. High 74F. Winds WSW at 5 to 10 mph. Chance of rain 50%.

  • Sunday Night

    Mostly cloudy skies. Low near 60F. Winds NNW at 5 to 10 mph.

  • Monday

    Sunshine and clouds mixed. High near 80F. Winds NNW at 5 to 10 mph.

  • Monday Night

    Partly cloudy skies early giving way to a few showers after midnight. Low 64F. Winds ESE at 5 to 10 mph. Chance of rain 30%.

  • Tuesday

    A few showers early with mostly sunny conditions later in the day. High 83F. Winds SSE at 5 to 10 mph. Chance of rain 30%.

  • Tuesday Night

    Partly cloudy with isolated thunderstorms developing overnight. Low 67F. Winds S at 5 to 10 mph. Chance of rain 30%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Herculaneum, Mott Street, Herculaneum, MO

Updated: 1:50 AM CDT

Temperature: 66.7 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.70 in Hourly Precipitation: - Graphs

Location: APRSWXNET, Pevely, MO

Updated: 1:22 AM CDT

Temperature: 59 °F Dew Point: 57 °F Humidity: 92% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Upper Moss Hollow Road, Barnhart, MO

Updated: 1:51 AM CDT

Temperature: 61.5 °F Dew Point: 51 °F Humidity: 69% Wind: North at - Pressure: 29.50 in Hourly Precipitation: - Graphs

Location: MesoWest, Maeystown, IL

Updated: 12:25 AM CDT

Temperature: 61 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Imperial - Wellington Subdivision, Imperial, MO

Updated: 1:52 AM CDT

Temperature: 62.1 °F Dew Point: 58 °F Humidity: 86% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 1:52 AM CDT

Temperature: 63.1 °F Dew Point: 56 °F Humidity: 77% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Graphs

Location: summerfield, Imperial, MO

Updated: 1:52 AM CDT

Temperature: 59.0 °F Dew Point: 58 °F Humidity: 96% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Graphs

Location: Main Street, Fults, IL

Updated: 1:51 AM CDT

Temperature: 61.9 °F Dew Point: 56 °F Humidity: 80% Wind: North at - Pressure: 29.74 in Hourly Precipitation: - Graphs

Location: Hillsboro, Missouri, Hillsboro, MO

Updated: 1:51 AM CDT

Temperature: 64.0 °F Dew Point: 54 °F Humidity: 70% Wind: Calm Pressure: 29.89 in Hourly Precipitation: - Graphs

Location: MesoWest, Columbia, IL

Updated: 1:00 AM CDT

Temperature: 68 °F Dew Point: - Humidity: - Wind: North at 255 mph Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Saint Louis, MO

Updated: 1:00 AM CDT

Temperature: 69 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Guardian Court, Arnold, MO

Updated: 1:50 AM CDT

Temperature: 63.9 °F Dew Point: 54 °F Humidity: 70% Wind: North at - Pressure: 30.08 in Hourly Precipitation: - Graphs

Location: Arrowhead STL County, Saint Louis, MO

Updated: 1:44 AM CDT

Temperature: 65.1 °F Dew Point: 52 °F Humidity: 63% Wind: Calm Pressure: 30.18 in Hourly Precipitation: - Graphs

Location: Chesapeake on the Bluff, Columbia, IL

Updated: 1:51 AM CDT

Temperature: 64.2 °F Dew Point: 55 °F Humidity: 71% Wind: Calm Pressure: 29.50 in Hourly Precipitation: 0.00 in Graphs

Location: Arnold # 1, Arnold, MO

Updated: 1:49 AM CDT

Temperature: 62.6 °F Dew Point: 52 °F Humidity: 67% Wind: Calm Pressure: 30.17 in Hourly Precipitation: - Graphs

Location: Rosewood Korner, Waterloo, IL

Updated: 1:51 AM CDT

Temperature: 64.6 °F Dew Point: 55 °F Humidity: 70% Wind: ESE at 2.7 mph Pressure: 29.42 in Hourly Precipitation: 0.00 in Graphs

Location: Arnold, MO

Updated: 1:46 AM CDT

Temperature: 60.9 °F Dew Point: 57 °F Humidity: 87% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Arnold, Arnold, MO

Updated: 1:52 AM CDT

Temperature: 62.8 °F Dew Point: 56 °F Humidity: 78% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: ARNOLD, Arnold, MO

Updated: 1:50 AM CDT

Temperature: 66.6 °F Dew Point: - Humidity: 62% Wind: North at - Pressure: 29.49 in Hourly Precipitation: - Graphs

Location: APRSWXNET, Cedar Hill, MO

Updated: 1:25 AM CDT

Temperature: 65 °F Dew Point: 56 °F Humidity: 72% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Graphs

Location: Christopher Winds, Oakville, MO

Updated: 1:52 AM CDT

Temperature: 64.6 °F Dew Point: 57 °F Humidity: 77% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 1:52 AM CDT

Temperature: 64.1 °F Dew Point: 55 °F Humidity: 72% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Hardy Acres / AA9UC, Waterloo, IL

Updated: 1:52 AM CDT

Temperature: 64.4 °F Dew Point: 54 °F Humidity: 69% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 1:52 AM CDT

Temperature: 65.1 °F Dew Point: 57 °F Humidity: 74% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: House Springs, House Springs, MO

Updated: 1:52 AM CDT

Temperature: 61.2 °F Dew Point: 57 °F Humidity: 86% Wind: NW at 2.0 mph Pressure: 27.21 in Hourly Precipitation: 0.00 in Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 1:50 AM CDT

Temperature: 63.3 °F Dew Point: 57 °F Humidity: 80% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Graphs

Location: Ste Genevieve county, Festus, MO

Updated: 1:51 AM CDT

Temperature: 60.2 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 1:52 AM CDT

Temperature: 66.4 °F Dew Point: 56 °F Humidity: 68% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 1:52 AM CDT

Temperature: 67.6 °F Dew Point: 55 °F Humidity: 64% Wind: East at 5.4 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Cathedral Drive, Saint Louis, MO

Updated: 1:51 AM CDT

Temperature: 67.5 °F Dew Point: 58 °F Humidity: 71% Wind: North at - Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Devall's Backyard, Waterloo, IL

Updated: 1:41 AM CDT

Temperature: 66.4 °F Dew Point: 56 °F Humidity: 70% Wind: Calm Pressure: 30.09 in Hourly Precipitation: - Graphs

Location: Brookton Oaks Drive, Cedar Hill, MO

Updated: 11:11 PM CDT

Temperature: 64.6 °F Dew Point: 53 °F Humidity: 65% Wind: North at - Pressure: 30.00 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 1:46 AM CDT

Temperature: 67.9 °F Dew Point: 56 °F Humidity: 66% Wind: ESE at 6.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: Lakeview Ridge Drive, Fenton, MO

Updated: 1:50 AM CDT

Temperature: 66.2 °F Dew Point: 55 °F Humidity: 67% Wind: North at - Pressure: 30.16 in Hourly Precipitation: - Graphs

Location: Gedern Village, Columbia, IL

Updated: 1:52 AM CDT

Temperature: 66.0 °F Dew Point: 57 °F Humidity: 73% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Graphs

Location: Deerpath Acres Court, Saint Louis, MO

Updated: 1:50 AM CDT

Temperature: 64.4 °F Dew Point: 55 °F Humidity: 71% Wind: North at - Pressure: 30.12 in Hourly Precipitation: - Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 1:52 AM CDT

Temperature: 66.2 °F Dew Point: 57 °F Humidity: 73% Wind: SE at 2.1 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Graphs

Location: Whipporwill Lane, Festus, MO

Updated: 1:52 AM CDT

Temperature: 66.4 °F Dew Point: 57 °F Humidity: 72% Wind: Calm Pressure: 30.34 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 
1128 PM CDT Sat may 23 2015 


Update: 
issued at 857 PM CDT Sat may 23 2015 


Forecast for the most part on track and have only made small 
adjustments based on latest radar trends and incorporating high 
temporal res model output. Small notch of rain is expected to edge 
the western edge of the County Warning Area thru midnight with pcpn in its wake to 
the S-SW expected to fill in, especially as line of storms pushes 
east thru OK and contributes to an expansion of the area of 
enhanced stratiform rain to the north. This should result in high 
pops for an area roughly west of a line from uin-cou for late 
evening and overnight with minimal pops or dry elsewhere. 


One exception which has some support amongst many of the short- 
term models is the idea of isolated-scattered rain showers developing over 
far southeast MO around daybreak and moving north towards stl Metro 
Sunday morning. At this point, the models still agree on a general 
expansion of rain showers/thunderstorms and rain coverage as we head into the afternoon 
hours. 


Tes 


&& 


Synopsis: 
issued at 145 PM CDT Sat may 23 2015 


The middle to upper levels of the atmosphere feature a deep trof 
of low pressure centered over The Four-Corners region with 
resulting southwest flow downstream across the Southern Plains. 
Embedded shortwave in this flow continues to produce heavy showers 
and thunderstorms across Kansas and OK. Further east, weak warm 
advection and moisture convergence along and north of the 850mb 
warm front was responsible for isolated to widely scattered 
showers across mainly southwest Missouri. 


Cvking 


&& 


Short term: (through tuesday) 
issued at 145 PM CDT Sat may 23 2015 


Tonight... 
main thrust of precipitation should remain just to the west of the 
County Warning Area through tomorrow morning with the highest pops and quantitative precipitation forecast 
concentrated across our central and northeast MO counties. That 
doesn't mean it will be completlely dry though, as isolated to 
scattered showers cannot be ruled out as far east as the Mississippi 
River as the 850mb warm front lifts north. 


Sunday... 
appears that the first round of precipitation should pull northeast 
of central and northeast MO during the morning hours with a threat 
of renewed thunderstorm development during the afternoon and evening 
areawide. Have maintained general trend of chance/sct pop increasing 
to likely during the afternoon, especially west of I-55. Believe 
there will be enough dry time for temperatures to warm into the 
upper 70s/lower 80s. 


Sunday night... 
not sure exactly how Sunday night will play out, as it will depend 
on convective trends during the afternoon and evening. Model 
guidance depicts a decent shortwave moving northeast across the area 
which would make one think there should be some pretty good coverage 
of precipitation. I have kept a blanket of categorical pops based on 
pattern recognition more than anything. 


Memorial Day... 
at this point it looks like the vast majority of the area will be 
dry on Memorial Day as the shortwave lifts northeast of the area and 
we are located in area of subsidence for the daylight hours. I 
suppose I can't rule out an isolated thunderstorm developing since 
we are still in southwest flow aloft and will be quite unstable, but 
chances are pretty low since there is no obvious trigger. 
Temperatures should be quite warm for the unofficial start of Summer 
with highs in the lower to middle 80s. 


Monday night and Tuesday... 
next shortwave in the southwest flow parade will bring a renewed 
threat of showers and thunderstorms to the County Warning Area Monday night into 
Tuesday. Temperatures may struggle some on Tuesday with cloud cover 
and expected rain coverage, so knocked anticipated highs down a few 
degrees across the southeastern half of the County Warning Area. 


Long term: (tuesday night through next saturday) 
issued at 145 PM CDT Sat may 23 2015 


The pattern looks to remain quite active with southwest flow 
expected through the period. Each shortwave will bring with it a 
chance of thunderstorms and temperatures should remain warm, with 
afternoon highs in the lower to middle 80s. 


Cvking 


&& 


Aviation: (for the 06z tafs through 06z Sunday night) 
issued at 1102 PM CDT Sat may 23 2015 


Mid-high level clouds will continue across the area late tonight 
with at least light showers moving through cou late tonight and 
possibly into uin towards morning. Could not rule out sprinkles in 
the St Louis Metro area late tonight, but the better chance of 
showers/storms should hold off until Sunday afternoon and night as 
a sly low level jet moves through the area. Prevailing cloud 
ceilings will also lower on Sunday, likely into the MVFR catagory 
in uin and cou and down to MVFR or at least low end VFR in the St 
Louis Metro area by afternoon. Sely surface wind will continue 
late tonight, becoming relatively strong and gusty from a S-sely 
direction on Sunday. 


Specifics for kstl: prevailing VFR mid level cloudiness late 
tonight, then the ceiling will lower into the MVFR or low end VFR 
catagory by Sunday afternoon. May be some sprinkles late tonight 
from mid level clouds, but the better threat of showers/storms 
should occur Sunday afternoon and night. Sely surface wind 
late tonight will strengthen and become gusty by late Sunday 
morning or afternoon from a S-sely direction. 


Gks 


&& 


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


$$ 


Weather forecast office lsx 












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