Alert archive / Missouri / Areal Flood Warnings in 2013

Areal Flood Warning 8, NWS St. Louis, MO

March 17, 20136 counties in Missouri; Monroe County, Randolph County, Illinois

NWS St. Louis, MO issued this areal flood warning at Mar 17, 2013, 12:42 PM CDT for 6 counties in Missouri; Monroe County, Randolph County, Illinois. It was in force for 6 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: Mar 17, 2013, 12:42 PM CDT (17:42 UTC)
Expired: Mar 17, 2013, 6:30 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Monroe County, IL, Randolph County, IL, Crawford County, MO, Iron County, MO, Jefferson County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 17:44 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, 5.7 hours before the alert went out and 314 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: 460 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 323 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 Mar 17, 12:32 PM CDT, 10 minutes earlier.

Area forecast discussion, Mar 17, 12:32 PM CDT, 10 minutes before

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Hazardous weather outlook, Mar 17, 10:50 AM CDT, 1 hour 52 minutes before

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In the hours before

Local storm report, Mar 17, 9:29 AM CDT, 3 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
929 AM CDT SUN MAR 17 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     HEAVY RAIN       5 SE RED BUD            38.16N  89.93W
03/17/2013  M1.51 INCH       RANDOLPH           IL   CO-OP OBSERVER

            SLEET MIXING IN CURRENTLY.

&&

GOSSELIN

Local storm report, Mar 17, 10:15 AM CDT, 2 hours 27 minutes before

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Local storm report, Mar 17, 10:40 AM CDT, 2 hours 2 minutes before

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Local storm report, Mar 17, 10:41 AM CDT, 2 hours 1 minute before

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Local storm report, Mar 17, 11:29 AM CDT, 1 hour 13 minutes before

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Local storm report, Mar 17, 12:09 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
Mar 17, 9:31 AM CDT	River Flood Warning	LSX	Jefferson	4 days
Mar 17, 9:34 AM CDT	River Flood Warning	LSX	Crawford, Washington	4 days
Mar 17, 6:19 PM CDT	Areal Flood Warning	LSX	Crawford, Franklin, Iron, Jefferson, Sainte Genevieve, Saint Francois and 1 more	18 hr

Nearby

Areal Flood Warnings in Missouri, 2013 Areal Flood Warnings in Illinois, 2013 Every areal flood warning in 2013

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.