Alert archive / Missouri / Areal Flood Warnings in 2016

Areal Flood Warning 16, NWS St. Louis, MO

August 15, 20165 counties in Missouri; Madison County, Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this areal flood warning at Aug 15, 2016, 1:50 PM CDT for 5 counties in Missouri; Madison County, Monroe County, Saint Clair County, Illinois. It was in force for 3 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 15, 2016, 1:50 PM CDT (18:50 UTC)
Expired: Aug 15, 2016, 4:45 PM CDT
In force: 3 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Madison County, IL, Monroe County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 58 km from the middle of the area, began a volume at 18:51 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, 6.8 hours before the alert went out and 256 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: 36 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 546 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 101 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 Aug 15, 12:44 PM CDT, 1 hour 6 minutes earlier.

Area forecast discussion, Aug 15, 12:44 PM CDT, 1 hour 6 minutes before

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Hazardous weather outlook, Aug 15, 4:25 AM CDT, 9 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAINT LOUIS MO
425 AM CDT MON AUG 15 2016

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-161200-
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-SAINT 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-SAINT CHARLES MO-FRANKLIN MO-
SAINT LOUIS MO-SAINT LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-SAINT FRANCOIS MO-SAINTE GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
425 AM CDT MON AUG 15 2016

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

HEAVY RAINFALL IS EXPECTED OVER PARTS OF EAST CENTRAL AND
SOUTHEAST MISSOURI AS WELL AS SOUTHWEST AND SOUTH CENTRAL
ILLINOIS. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THESE AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT RAINFALL AMOUNTS IN EXCESS OF
TWO INCHES OR ANY FLOODING TO THE NATIONAL WEATHER SERVICE.

TILLY

In the hours before

Local storm report, Aug 15, 11:06 AM CDT, 2 hours 44 minutes before

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Local storm report, Aug 15, 11:14 AM CDT, 2 hours 36 minutes before

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Local storm report, Aug 15, 11:38 AM CDT, 2 hours 12 minutes before

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Local storm report, Aug 15, 11:57 AM CDT, 1 hour 53 minutes before

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Local storm report, Aug 15, 11:58 AM CDT, 1 hour 52 minutes before

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Local storm report, Aug 15, 12:25 PM CDT, 1 hour 25 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
Aug 14, 8:01 PM CDT	River Flood Warning	LSX	Saint Charles	53 hr
Aug 14, 8:10 PM CDT	River Flood Warning	LSX	Reynolds	4 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Crawford	3 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Crawford, Washington	4 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Franklin, Jefferson	6 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	6 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	6 days
Aug 14, 9:37 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	6 days
Aug 14, 9:41 PM CDT	River Flood Warning	LSX	Jefferson	4 days
Aug 14, 9:45 PM CDT	River Flood Warning	LSX	Franklin	5 days
Aug 15, 2:34 AM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
Aug 15, 4:04 AM CDT	Flash Flood Warning	LSX	Saint Louis, City of Saint Louis	6 hr
Aug 15, 4:54 AM CDT	Flash Flood Warning	LSX	Iron, Reynolds, Washington	6 hr
Aug 15, 5:03 AM CDT	Flash Flood Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Saint Louis, Washington	6 hr
Aug 15, 8:34 AM CDT	Areal Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
Aug 15, 9:25 AM CDT	Areal Flood Warning	LSX	Sainte Genevieve	3 hr
Aug 15, 9:58 AM CDT	Areal Flood Warning	LSX	Saint Louis, City of Saint Louis	3 hr
Aug 15, 10:14 AM CDT	Areal Flood Warning	LSX	Madison	3 hr
Aug 15, 10:43 AM CDT	Areal Flood Warning	LSX	Iron, Reynolds, Washington	3 hr
Aug 15, 11:01 AM CDT	Areal Flood Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Saint Louis, Washington	3 hr
Aug 15, 2:29 PM CDT	Areal Flood Warning	LSX	Sainte Genevieve, Saint Francois	3 hr
Aug 15, 5:50 AM CDT	Flash Flood Warning	LSX	Madison, Saint Clair	5 hr
Aug 15, 6:59 AM CDT	Flash Flood Warning	LSX	Bond, Montgomery	5 hr
Aug 15, 10:48 AM CDT	Areal Flood Warning	LSX	Madison, Saint Clair	3 hr

Nearby

Areal Flood Warnings in Missouri, 2016 Areal Flood Warnings in Illinois, 2016 Every areal flood warning in 2016

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.