Alert archive / Illinois / Areal Flood Warnings in 2014

Areal Flood Warning 6, NWS St. Louis, MO

April 4, 20145 counties in Illinois

NWS St. Louis, MO issued this areal flood warning at Apr 4, 2014, 3:26 PM CDT for 5 counties in Illinois. It was in force for 24 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 4, 2014, 3:26 PM CDT (20:26 UTC)
Expired: Apr 5, 2014, 3:30 PM CDT
In force: 24 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Clinton County, IL, Marion County, IL, Monroe County, IL, Saint Clair County, IL, Washington County, IL

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 20:25 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

Nashville Metro, TN (KBNA), launched 12:00Z, 8.4 hours before the alert went out and 370 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: 1263 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 121 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 4, 3:17 PM CDT, 9 minutes earlier.

Area forecast discussion, Apr 4, 3:17 PM CDT, 9 minutes before

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Hazardous weather outlook, Apr 4, 4:07 AM CDT, 11 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
407 AM CDT FRI APR 4 2014

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-041015-
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 MO-
LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO-
AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-
LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
407 AM CDT FRI APR 4 2014

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

GLASS

In the hours before

Local storm report, Apr 4, 10:49 AM CDT, 4 hours 37 minutes before

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Local storm report, Apr 4, 11:03 AM CDT, 4 hours 23 minutes before

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Local storm report, Apr 4, 11:04 AM CDT, 4 hours 22 minutes before

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Local storm report, Apr 4, 11:05 AM CDT, 4 hours 21 minutes before

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Local storm report, Apr 4, 11:14 AM CDT, 4 hours 12 minutes before

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Local storm report, Apr 4, 1:57 PM CDT, 1 hour 29 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 3, 7:00 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	45 min
Apr 3, 7:13 PM CDT	Tornado Warning Tornado observed	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren	32 min
Apr 3, 7:22 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren	53 min
Apr 3, 8:04 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	41 min
Apr 3, 8:09 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	51 min
Apr 3, 8:23 PM CDT	Tornado Warning Tornado observed	LSX	Saint Louis, City of Saint Louis	22 min
Apr 3, 9:00 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Louis, Washington	45 min
Apr 3, 9:25 PM CDT	Flash Flood Warning	LSX	Crawford, Franklin, Jefferson, Washington	9 hr
Apr 3, 9:53 PM CDT	River Flood Warning	LSX	Callaway, Osage	65 hr
Apr 3, 9:53 PM CDT	River Flood Warning	LSX	Gasconade, Montgomery	3 days
Apr 3, 9:53 PM CDT	River Flood Warning	LSX	Gasconade, Montgomery	57 hr
Apr 3, 10:13 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	47 min
Apr 3, 10:22 PM CDT	Areal Flood Warning	LSX	Boone, Callaway	10 hr
Apr 4, 6:26 AM CDT	Areal Flood Warning	LSX	Crawford, Franklin, Jefferson, Washington	9 hr
Apr 4, 9:53 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	65 hr
Apr 4, 9:53 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	3 days
Apr 3, 7:51 PM CDT	River Flood Warning	LSX	Clinton	10 days
Apr 3, 8:46 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	44 min
Apr 3, 9:44 PM CDT	Flash Flood Warning	LSX	Clinton, Marion, Monroe, Saint Clair, Washington	9 hr
Apr 4, 6:31 AM CDT	Areal Flood Warning	LSX	Clinton, Marion, Monroe, Saint Clair, Washington	9 hr

Nearby

Areal Flood Warnings in Illinois, 2014 Every areal flood warning in 2014

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.