Troy, Missouri Weather Conditions

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Current Conditions

  • 68°
  • Overcast
  • Wind: NW 18 mph
  • Humidity: 100%
  • Visibility: 6.0 miles
  • Dew Point: 68°
  • Pressure: 29.85 in. -

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Next 12 Hours

4  am
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Thunderstorm
T-storms
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T-storms
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66°
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Thunderstorm
  • High: 81 °
  • Low: 57 °
  • T-Storms
  • Friday
  • Chance of Rain
  • High: 64 °
  • Low: 39 °
  • Chance of Rain
  • Saturday
  • Clear
  • High: 57 °
  • Low: 41 °
  • Clear
  • Sunday
  • Mostly Cloudy
  • High: 70 °
  • Low: 46 °
  • Mostly Cloudy
  • Monday
  • Chance of Rain
  • High: 64 °
  • Low: 50 °
  • Chance of Rain

Forecast for Troy, Missouri

Updated: 4:00 AM CDT on October 02, 2014

Flash Flood Watch in effect through this evening...
  • Thursday

    Overcast with thunderstorms and rain showers. High of 81F. Winds from the South at 5 to 10 mph. Chance of rain 80% with rainfall amounts near 0.7 in. possible.

  • Thursday Night

    Overcast with thunderstorms and rain showers, then a chance of a thunderstorm and a chance of rain after midnight. Low of 57F. Winds from the SSW at 5 to 10 mph shifting to the West after midnight. Chance of rain 80% with rainfall amounts near 0.8 in. possible.

  • Friday

    Partly cloudy with a chance of rain in the afternoon. High of 64F. Windy. Winds from the WNW at 15 to 25 mph with gusts to 35 mph. Chance of rain 20%.

  • Friday Night

    Partly cloudy in the evening, then clear. Low of 39F. Breezy. Winds from the West at 10 to 20 mph.

  • Saturday

    Clear. High of 57F. Breezy. Winds from the West at 15 to 20 mph.

  • Saturday Night

    Clear in the evening, then partly cloudy. Low of 41F. Winds from the West at 5 to 10 mph shifting to the SSW after midnight.

  • Sunday

    Mostly cloudy in the morning, then overcast. High of 70F. Winds from the SSW at 10 to 15 mph shifting to the West in the afternoon.

  • Sunday Night

    Overcast. Low of 46F. Winds from the West at 5 to 10 mph.

  • Monday

    Partly cloudy in the morning, then overcast with a chance of rain. High of 64F. Winds from the SW at 5 to 15 mph. Chance of rain 20%.

  • Monday Night

    Partly cloudy with a chance of rain. Low of 50F. Winds from the WSW at 5 to 15 mph. Chance of rain 40%.

  • Tuesday

    Clear. High of 72F. Winds from the West at 5 to 15 mph.

  • Tuesday Night

    Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.

  • Wednesday

    Clear with a chance of a thunderstorm. High of 81F. Winds from the SW at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 59F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.

  • Thursday

    Mostly cloudy. High of 73F. Winds from the SSW at 10 to 15 mph.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Low of 54F. Winds from the East at 5 to 15 mph shifting to the NNE after midnight. Chance of rain 20%.

  • Friday

    Mostly cloudy with a chance of a thunderstorm. Fog early. High of 70F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Overcast. Fog overnight. Low of 48F. Winds less than 5 mph.

  • Saturday

    Overcast with a chance of rain. Fog early. High of 61F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday Night

    Mostly cloudy. Fog overnight. Low of 46F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. High of 61F. Winds less than 5 mph.

  • Sunday Night

    Clear. Fog overnight. Low of 46F. Winds less than 5 mph.

Severe Weather Alert Descriptions

 Areal Flood Advisory, Flash Flood Watch  Statement as of 3:01 am CDT on October 2, 2014


The National Weather Service in St Louis has issued a

* Flood Advisory for...
Calhoun County in southwest Illinois...
Jersey County in southwest Illinois...
Lincoln County in east central Missouri...
Macoupin County in southwest Illinois...
northwestern Montgomery County in south central Illinois...
southern Greene County in southwest Illinois...

* until 900 am CDT

* at 300 am CDT... National Weather Service Doppler radar indicated
thunderstorms with heavy rainfall have continued to occur
overnight with rainfall amounts of 2 to 4 inches in the advised
area... with locally higher amounts possible.

* Runoff from this excessive rainfall will cause minor flooding to
occur... especially along small streams and near low water
crossings. Some locations that will experience minor flooding
include... Carlinville... Elsberry... Jerseyville... Troy...
Carrollton... Davis... Farmersville... Girard... Greenfield... Hardin...
Kemper... Moscow Mills... Old Kane... Palmyra... Raymond... Shipman...
White Oak and Winfield.

Precautionary/preparedness actions...

A Flood Advisory means river or stream flows are elevated or ponding
of water is occurring or is imminent. Excessive runoff from this
storm will cause minor flooding of small creeks and
streams... country roads... as well as farmland along the banks of
creeks and streams.


Lat... Lon 3925 8949 3900 9051 3889 9109 3912 9111
      3953 8967 3953 8961 3951 8953 3936 8953
      3935 8940


Cvking


1241 am CDT Thu Oct 2 2014

... Flash Flood Watch in effect through this evening...

The National Weather Service in St Louis has expanded the

* Flash Flood Watch to include portions of Illinois and
Missouri... including the following counties... in Illinois...
Adams IL... Brown IL... Calhoun IL... Greene IL... Jersey IL...
Macoupin IL... Montgomery IL and Pike IL. In Missouri... Knox
MO... Lewis MO... Lincoln MO... Marion MO... Pike MO... Ralls MO...
Shelby MO and Warren MO.

* Through this evening

* heavy rain is expected to come in waves of thunderstorms
overnight and during the day on Thursday. Rainfall amounts in
excess of 3 inches with locally higher amounts are possible.

* Heavy rainfall will result in flooding of low lying or poor
drainage areas... and ultimately dangerous flash flooding on
smaller creeks and streams. Significant rises on larger
streams and rivers will also be possible.

Precautionary/preparedness actions...

A Flash Flood Watch means that flash flooding is possible but not
imminent in the watch area. People in the watch area should be
aware of the possibility of heavy rainfall and flash flooding.
Check your preparedness requirements... especially if you live in
flood prone areas. Stay informed... and be ready for quick action
if flooding is observed or if a Flash Flood Warning is issued.






Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Cuivre Valley, Troy, MO

Updated: 3:22 AM CDT

Temperature: 62.6 °F Dew Point: 62 °F Humidity: 96% Wind: East at 5.0 mph Pressure: 29.86 in Hourly Precipitation: 0.70 in Graphs

Location: Settlers Pointe, Wentzville, MO

Updated: 3:20 AM CDT

Temperature: 64.1 °F Dew Point: 61 °F Humidity: 90% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Graphs

Location: Providence Meadows, Wentzville, MO

Updated: 3:22 AM CDT

Temperature: 65.5 °F Dew Point: 64 °F Humidity: 96% Wind: Calm Pressure: 29.74 in Hourly Precipitation: 0.00 in Graphs

Location: Highland Estates, Wentzville, MO

Updated: 3:22 AM CDT

Temperature: 64.3 °F Dew Point: 64 °F Humidity: 98% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.58 in Graphs

Location: Swaying Oaks, Wentzville, MO

Updated: 11:52 PM CDT

Temperature: 66.6 °F Dew Point: 52 °F Humidity: 60% Wind: ESE at 2.0 mph Pressure: 29.26 in Hourly Precipitation: 0.00 in Graphs

Location: St. Paul (SJC), OFallon, MO

Updated: 3:22 AM CDT

Temperature: 63.9 °F Dew Point: 63 °F Humidity: 96% Wind: NNE at 3.0 mph Pressure: 29.85 in Hourly Precipitation: 0.23 in Graphs

Location: Golf Club of Wentzville, Wentzville, MO

Updated: 3:21 AM CDT

Temperature: 64.6 °F Dew Point: 63 °F Humidity: 95% Wind: NNE at 2.0 mph Pressure: 29.82 in Hourly Precipitation: 0.09 in Graphs

Location: Batchtown, Batchtown, IL

Updated: 3:19 AM CDT

Temperature: 63.7 °F Dew Point: 64 °F Humidity: 100% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.59 in Graphs

Location: Fence Post Weather, Warrenton, MO

Updated: 3:21 AM CDT

Temperature: 63.8 °F Dew Point: 62 °F Humidity: 94% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.04 in Graphs

Location: Royal Oaks, O'Fallon, MO

Updated: 3:22 AM CDT

Temperature: 63.8 °F Dew Point: 63 °F Humidity: 96% Wind: NNW at 7.0 mph Pressure: 29.85 in Hourly Precipitation: 0.44 in Graphs

Location: Hase's Lair, Warrenton, MO

Updated: 3:20 AM CDT

Temperature: 64.6 °F Dew Point: 64 °F Humidity: 97% Wind: Calm Pressure: 29.79 in Hourly Precipitation: 0.00 in Graphs

Location: Hyland Green, O'Fallon, MO

Updated: 3:22 AM CDT

Temperature: 64.6 °F Dew Point: 64 °F Humidity: 99% Wind: NW at 1.6 mph Pressure: 29.48 in Hourly Precipitation: 0.00 in Graphs

Location: Locksley Manor, Lake Saint Louis, MO

Updated: 3:22 AM CDT

Temperature: 65.8 °F Dew Point: 66 °F Humidity: 99% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.43 in Graphs

Location: Ridgepointe-Meadowbrook, Lake Saint Louis, MO

Updated: 3:22 AM CDT

Temperature: 65.8 °F Dew Point: 62 °F Humidity: 89% Wind: NW at 3.6 mph Pressure: 29.82 in Hourly Precipitation: 0.05 in Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 3:22 AM CDT

Temperature: 64.6 °F Dew Point: 63 °F Humidity: 95% Wind: NNE at 1.0 mph Pressure: 29.88 in Hourly Precipitation: 1.99 in Graphs

Location: Blue Ridge, Hardin, IL

Updated: 3:14 AM CDT

Temperature: 63.8 °F Dew Point: 63 °F Humidity: 98% Wind: SW at 2.0 mph Pressure: 29.82 in Hourly Precipitation: 0.53 in Graphs

Location: Downtown O'Fallon, O'Fallon, MO

Updated: 3:22 AM CDT

Temperature: 63.0 °F Dew Point: 63 °F Humidity: 99% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.21 in Graphs

Location: Dardenne Prairie, Dardenne Prairie, MO

Updated: 3:20 AM CDT

Temperature: 65.3 °F Dew Point: 62 °F Humidity: 88% Wind: NNW at 2.7 mph Pressure: 29.57 in Hourly Precipitation: 0.03 in Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 3:20 AM CDT

Temperature: 65.5 °F Dew Point: 63 °F Humidity: 93% Wind: North at 4.0 mph Pressure: 29.86 in Hourly Precipitation: 0.69 in Graphs

Location: New Melle, Wentzville, MO

Updated: 3:22 AM CDT

Temperature: 64.9 °F Dew Point: 65 °F Humidity: 99% Wind: Calm Pressure: 29.74 in Hourly Precipitation: 0.01 in Graphs

Location: Avondale, Wentzville, MO

Updated: 3:22 AM CDT

Temperature: 65.5 °F Dew Point: 65 °F Humidity: 97% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.01 in Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 3:22 AM CDT

Temperature: 66.2 °F Dew Point: 62 °F Humidity: 87% Wind: East at 1.1 mph Pressure: 29.81 in Hourly Precipitation: 0.13 in Graphs

Location: The Boardwalk at WingHaven, OFallon, MO

Updated: 3:17 AM CDT

Temperature: 66.6 °F Dew Point: 64 °F Humidity: 93% Wind: NE at 11.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Graphs

Location: Macedonia/Post Oak, Warrenton, MO

Updated: 3:20 AM CDT

Temperature: 63.6 °F Dew Point: 62 °F Humidity: 96% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Graphs

Location: St. Peters, St. Peters, MO

Updated: 3:22 AM CDT

Temperature: 66.6 °F Dew Point: 64 °F Humidity: 90% Wind: North at 4.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 3:16 AM CDT

Temperature: 66.6 °F Dew Point: 65 °F Humidity: 94% Wind: NNE at 8.9 mph Pressure: 29.77 in Hourly Precipitation: - Graphs

Location: Katie Hollow, Kampsville, IL

Updated: 3:22 AM CDT

Temperature: 64.3 °F Dew Point: 63 °F Humidity: 96% Wind: Calm Pressure: 29.74 in Hourly Precipitation: 0.13 in Graphs

Location: Indian Ridge, Defiance, MO

Updated: 3:20 AM CDT

Temperature: 65.7 °F Dew Point: 65 °F Humidity: 97% Wind: WNW at 2.9 mph Pressure: 29.91 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 
National Weather Service St Louis MO 
1246 am CDT Thu Oct 2 2014 


Update: 
issued at 1243 am CDT Thu Oct 2 2014 


Have expanded the Flash Flood Watch to include the remainder of 
northeast Missouri and west central Illinois (northwest of St. 
Louis metro). Locations have received heavy rainfall tonight and 
expectation is that another few inches of rain overnight and later 
today could push some local streams, creeks, rivers out of their 
banks. Will also be watching developing line of convection across 
central Missouri for any potential of severe wind gusts or hail 
over the next few hours as it moves east. 


Issued at 853 PM CDT Wed Oct 1 2014 


Forecast looks to be generally on track and I don't foresee any 
major changes for the rest of the evening. Instability is waning, 
but obviously there's enough to keep some rather strong storms 
going. Will most likely let ww511 expire naturally at 1000 PM. The 
challenge after 1000 PM will be trying to figure out exactly where 
the heaviest rain will fall for the rest of the night. It still 
looks like the best threat for heavy rain and training will be 
over parts of our central Missouri counties. Rap is persistently 
showing moderate to strong moisture convergence at 850mb. Storms 
this evening have been efficient rain producers, and I expect this 
will not change. No change to Flash Flood Watch at this time, and 
will probably only tweak pops to match current radar trends. 


Carney 


&& 


Short term: (through Thursday night) 
issued at 340 PM CDT Wed Oct 1 2014 


Lots to keep track of in the next 24 to 36 hours. First: severe 
thunderstorms have developed along the outflow boundary in central 
Missouri left over from storms earlier today. Modest instability 
between 1000-1500 j/kg combined with around 40 kts bulk shear have 
produced a supercell which is riding the boundary. A few more 
cells are developing ahead of the big storm and may continue to 
strengthen. Expect the severe threat to continue into the early to 
mid evening hours...generally along and south of I-70. Should see 
storms weaken within a few hours of sunset, but then the low level 
jet strengthens in southwest flow ahead of the broad trof over The 
Rockies and developing low level circulation over the plains. This 
will bring the second area of concern into play: heavy rain. 
Thunderstorms this morning and now this current round of severe 
convection will saturate the ground and increase the potential for 
flash flooding. Aforementioned 30-40kt low level jet is bringing 
plenty of Gulf moisture up into the area. Forecast soundings show 
a warm cloud depth of nearly 12,000 feet and BUFKIT is indicating 
that individual convective elements may move very slowly and train 
over the same locations. Current quantitative precipitation forecast from wpc shows rainfall in 
excess of 3 inches over the next 24 hours with locally higher 
amounts in addition to what's already fallen. Therefore have gone 
ahead and pushed a Flash Flood Watch for parts of Central, 
Northeast, and east central Missouri. Watch may need to be 
extended further east or northeast tonight as the situation 
develops. 


Attention turns to tomorrow when the upper level trof moves into the 
Great Plains and the associated surface system moves from northern 
Oklahoma into eastern Iowa through the day. Our County warning forecast area will be 
squarely in the warm sector through the day, and even if there are 
no breaks in the clouds temperatures should be at least between 80 
and 85...if not a tad bit warmer. With warm, humid airmass in 
place, NAM is forecasting SBCAPE values in excess of 2500 j/kg in 
some parts of the County warning forecast area. With 30-40kts of deep layer shear, and the 
approaching shortwave becoming negatively tilted , this looks like a 
good setup for severe weather during the afternoon and evening 
hours. The shear vector looks like it will be parallel to the front 
so the most likely convective Mode will be a squall line with bows 
and lewps possible. The front will sweep through the area overnight 
Thursday night and we should be into cold advection by 12z Friday 
morning. 


Carney 


Long term: (thursday through next wednesday) 
issued at 403 PM CDT Wed Oct 1 2014 


Fall returns with a vengeance Friday and Saturday. Temperatures 
will drop 25 to 30 degrees behind the front Friday and Saturday. It 
will also be pretty breezy behind the front on Friday. Forecast 
soundings show some pretty good mixing which is likely to produce 
wind gusts in excess of 30 mph. Guidance is hinting at lows in the 
30s across most of the area on Saturday morning, and this looks 
reasonable given the strength of the cold advection. This could 
easily be the coolest night of the season so far. 


Temperatures slowly moderate Sunday through next Wednesday. The 
highly amplified upper level pattern featuring a strong vortex just 
north of the Great Lakes region and a longwave trof over the eastern 
1/2 of the Continental U.S. Will slowly become more zonal through midweek. By 
Wednesday the flow aloft should be nearly zonal and low level warm 
advection will bring temperatures back to near or above normal. 


Carney 


&& 


Aviation: (for the 06z tafs through 06z Thursday night) 
issued at 1142 PM CDT Wed Oct 1 2014 


Ongoing showers and thunderstorms have continued to lift a bit 
further northward, so only have vcts mention for taf sites along 
I-70 corridor through 12z Thursday. For KUIN, showers to persist 
with some thunderstorms through the early morning hours. Will see 
a break in the activity during the mid morning hours before more 
significant activity fires up ahead of cold front during the 
afternoon and evening hours. Winds to persist from the southeast 
then veer to the south by mid morning. As cold front approaches, 
winds to begin veering to the southwest between 23z Thursday and 
03z Friday. Frontal passage will be beyond the forecast period. 


Specifics for kstl: 
ongoing showers and thunderstorms have continued to lift a bit 
further northward, so only have vcts mention for Metro area through 
12z Thursday. Will see a break in the activity during the mid 
morning hours before more significant activity fires up ahead of 
cold front after 21z Thursday. Winds to persist from the southeast 
then veer to the south 12z Thursday. As cold front approaches, 
winds to begin veering to the southwest between 23z Thursday and 
03z Friday. Frontal passage will be around 09z Friday with 
precipitation tapering off. 


Byrd 


&& 


Lsx watches/warnings/advisories: 
MO...Flash Flood Watch through this evening for Audrain MO-Boone MO- 
Callaway MO-Cole MO-Gasconade MO-Knox MO-Lewis MO-Lincoln 
MO-Marion MO-Moniteau MO-Monroe MO-Montgomery MO-Osage MO- 
Pike MO-Ralls MO-Shelby MO-Warren MO. 


Illinois...Flash Flood Watch through this evening for Adams Illinois-Brown Illinois- 
Calhoun Illinois-Greene Illinois-Jersey Illinois-Macoupin Illinois-Montgomery Illinois- 
Pike Illinois. 


&& 


$$ 


Weather forecast office lsx 



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