Alert archive / Missouri / Areal Flood Warnings in 2009
Areal Flood Warning 33, NWS St. Louis, MO
NWS St. Louis, MO issued this areal flood warning at Aug 17, 2009, 5:28 PM CDT for Shelby County, Missouri. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 17, 2009, 5:28 PM CDT (22:28 UTC)
- Expired
- Aug 18, 2009, 5:30 AM CDT
- In force
- 12 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Shelby County, MO
The radar
The St Louis radar (KLSX), 171 km from the middle of the area, began a volume at 22:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 299 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 70 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before this areal flood warning went out at Aug 17, 3:13 PM CDT, 2 hours 15 minutes earlier.
Area forecast discussion, Aug 17, 3:13 PM CDT, 2 hours 15 minutes before
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</html>Hazardous weather outlook, Aug 17, 3:46 PM CDT, 1 hour 42 minutes before
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Special weather statement, Aug 17, 2:14 PM CDT, 3 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 214 PM CDT MON AUG 17 2009 MOZ052-060-061-172000- LINCOLN MO-ST. CHARLES MO-WARREN MO- 214 PM CDT MON AUG 17 2009 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LINCOLN...EASTERN WARREN AND NORTHWESTERN ST. CHARLES COUNTIES UNTIL 300 PM CDT... AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR TRUESDALE...OR 5 MILES SOUTHEAST OF WARRENTON...MOVING NORTHEAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... WRIGHT CITY... WENTZVILLE... TROY... LAKE ST. LOUIS... ST. PAUL... MOSCOW MILLS... FORISTELL... FLINT HILL... OLD MONROE... TILLY
Local storm report, Aug 17, 2:27 PM CDT, 3 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
227 PM CDT MON AUG 17 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0220 PM TSTM WND GST 3 S FULTON 38.81N 91.95W
08/17/2009 M53 MPH CALLAWAY MO TRAINED SPOTTER
&&
EVENT NUMBER LSX0900083
DYELocal storm report, Aug 17, 4:08 PM CDT, 1 hour 20 minutes before
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</html>Local storm report, Aug 17, 4:16 PM CDT, 1 hour 12 minutes before
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</html>Special weather statement, Aug 17, 4:20 PM CDT, 1 hour 8 minutes before
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</html>Special weather statement, Aug 17, 4:53 PM CDT, 35 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 11:54 PM CDT | Flash Flood Warning | LSX | Knox | 6 hr |
| Aug 17, 1:57 AM CDT | Flash Flood Warning | LSX | Knox, Lewis, Marion, Monroe, Shelby | 4 hr |
| Aug 17, 4:09 AM CDT | Flash Flood Watch | LSX | Knox, Lewis, Marion, Monroe, Pike, Ralls and 1 more | 11 hr |
| Aug 17, 11:44 AM CDT | Flash Flood Warning | LSX | Shelby | 6 hr |
| Aug 17, 2:16 PM CDT | Areal Flood Advisory | LSX | Knox, Lewis, Marion, Monroe, Ralls | 5 hr |
| Aug 17, 3:10 PM CDT | River Flood Warning | LSX | Lewis | 28 hr |
| Aug 17, 5:14 PM CDT | Areal Flood Advisory | LSX | Saint Charles, Saint Louis, City of Saint Louis | 6 hr |
| Aug 16, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 48 min |
Nearby
Areal Flood Warnings in Missouri, 2009Every areal flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.