Alert archive / Missouri / Areal Flood Warnings in 2009

Areal Flood Warning 5, NWS St. Louis, MO

April 30, 20096 counties in Missouri

NWS St. Louis, MO issued this areal flood warning at Apr 30, 2009, 5:13 PM CDT for 6 counties in 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: Apr 30, 2009, 5:13 PM CDT (22:13 UTC)
Expired: May 1, 2009, 5:00 AM CDT
In force: 12 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Audrain County, MO, Boone County, MO, Callaway County, MO, Marion County, MO, Monroe County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 133 km from the middle of the area, began a volume at 22:13 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

Springfield, MO (KSGF), launched 12:00Z, 10.2 hours before the alert went out and 317 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Apr 30, 3:59 PM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Apr 30, 3:59 PM CDT, 1 hour 14 minutes before

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Hazardous weather outlook, Apr 30, 3:50 PM CDT, 1 hour 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
350 PM CDT THU APR 30 2009

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-011245-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX-LEWIS-
SHELBY-MARION-MONROE-RALLS-PIKE-BOONE-AUDRAIN-MONITEAU-COLE-OSAGE-
CALLAWAY-MONTGOMERY-LINCOLN-GASCONADE-WARREN-ST. CHARLES-FRANKLIN-
ST. LOUIS-ST. LOUIS CITY-JEFFERSON-CRAWFORD-WASHINGTON-
ST. FRANCOIS-STE. GENEVIEVE-IRON-MADISON-REYNOLDS-
350 PM CDT THU APR 30 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TONIGHT

THERE IS A CHANCE FOR THUNDERSTORMS TONIGHT ACROSS THE ENTIRE
AREA.

MODERATE TO MAJOR FLOODING CONTINUES ALONG PORTIONS OF THE
ILLINOIS RIVER...WITH MODERATE FLOODING ALONG PORTIONS OF THE
MISSOURI RIVER. PLEASE SEE THE APPROPRIATE FLOOD PRODUCTS FOR
FURTHER INFORMATION.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE CHANCE FOR THUNDERSTORMS CONTINUES FRIDAY THROUGH WEDNESDAY AS A
SERIES OF WEATHER DISTURBANCES TRACK THROUGH THE MID-MISSISSIPPI
VALLEY. THESE STORMS WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL. A FEW STRONG TO SEVERE THUNDERSTORMS WILL ALSO BE
POSSIBLE ON FRIDAY...MAINLY SOUTH OF INTERSTATE 70.

MODERATE TO MAJOR FLOODING IS FORECAST ALONG THE ILLINOIS...
MISSISSIPPI...AND MISSOURI RIVERS. PLEASE SEE THE APPROPRIATE
FLOOD PRODUCTS FOR FURTHER INFORMATION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

&&

FOR A GRAPHICAL VERSION OF THIS INFORMATION SEE OUR
WEBPAGE AT (LOWERCASE)... HTTP://WWW.WEATHER.GOV/LSX/?N=HWO1

SIPPRELL

In the hours before

Local storm report, Apr 30, 4:40 PM CDT, 33 minutes before

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The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 9:44 PM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	6 days
Apr 29, 10:47 PM CDT	Areal Flood Advisory	LSX	Boone, Callaway, Cole, Moniteau	6 hr
Apr 29, 11:34 PM CDT	Flash Flood Warning	LSX	Audrain, Monroe	6 hr
Apr 30, 12:38 AM CDT	Flash Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	5 hr
Apr 30, 1:10 AM CDT	Flash Flood Warning	LSX	Lewis, Marion, Ralls, Shelby	6 hr
Apr 30, 1:58 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	27 days
Apr 30, 2:56 AM CDT	River Flood Warning	LSX	Lewis	9 hr
Apr 30, 2:56 AM CDT	River Flood Warning	LSX	Marion	24 hr
Apr 30, 3:05 AM CDT	River Flood Warning	LSX	Marion	50 hr
Apr 30, 5:33 AM CDT	Areal Flood Warning	LSX	Audrain, Boone, Callaway, Monroe	6 hr
Apr 30, 6:59 AM CDT	Areal Flood Warning	LSX	Lewis, Marion, Pike, Ralls, Shelby	5 hr
Apr 30, 9:13 AM CDT	River Flood Warning	LSX	Cole	28 hr
Apr 30, 11:30 AM CDT	Areal Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Marion, Moniteau and 4 more	6 hr
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Lewis	5 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Marion	4 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Marion	69 hr
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Marion	9 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Ralls	6 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Pike	10 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Lincoln	10 days
Apr 30, 2:40 PM CDT	River Flood Warning	LSX	Saint Louis, City of Saint Louis	7 days
Apr 30, 3:56 PM CDT	River Flood Warning	LSX	Lewis	41 hr
Apr 30, 5:24 AM CDT	River Flood Warning	LSX	Brown	7 days
Apr 30, 12:42 PM CDT	River Flood Warning	LSX	Fayette	4 days

Nearby

Areal Flood Warnings in Missouri, 2009 Every 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.