Alert archive / Missouri / Areal Flood Warnings in 2011

Areal Flood Warning 11, NWS St. Louis, MO

June 15, 2011Lewis County, Missouri; Adams County, Illinois

NWS St. Louis, MO issued this areal flood warning at Jun 15, 2011, 6:56 AM CDT for Lewis County, Missouri; Adams County, Illinois. 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: Jun 15, 2011, 6:56 AM CDT (11:56 UTC)
Expired: Jun 15, 2011, 7:00 PM CDT
In force: 12 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Adams County, IL, Lewis County, MO

The radar

The St Louis radar (KLSX), 163 km from the middle of the area, began a volume at 11:58 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

Davenport, (KDVN), launched 00:00Z, 11.9 hours before the alert went out and 193 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: 1429 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Jun 15, 6:21 AM CDT, 35 minutes earlier.

Area forecast discussion, Jun 15, 6:21 AM CDT, 35 minutes before

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Hazardous weather outlook, Jun 15, 5:28 AM CDT, 1 hour 28 minutes before

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In the hours before

Local storm report, Jun 15, 3:48 AM CDT, 3 hours 8 minutes before

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Local storm report, Jun 15, 3:59 AM CDT, 2 hours 57 minutes before

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Local storm report, Jun 15, 4:18 AM CDT, 2 hours 38 minutes before

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Special weather statement, Jun 15, 4:45 AM CDT, 2 hours 11 minutes before

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Local storm report, Jun 15, 5:01 AM CDT, 1 hour 55 minutes before

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Local storm report, Jun 15, 5:58 AM CDT, 58 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
Jun 15, 12:07 AM CDT	Flash Flood Warning	LSX	Lewis	8 hr
Jun 15, 3:23 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	41 min
Jun 15, 3:29 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	46 min
Jun 15, 3:45 AM CDT	Areal Flood Advisory	LSX	Boone, Callaway, Cole, Franklin, Gasconade, Lincoln and 6 more	3 hr
Jun 15, 4:00 AM CDT	Flash Flood Warning	LSX	Lincoln, Montgomery, Warren	3 hr
Jun 15, 4:02 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	43 min
Jun 15, 3:46 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison	44 min
Jun 15, 4:15 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	48 min

Nearby

Areal Flood Warnings in Missouri, 2011 Areal Flood Warnings in Illinois, 2011 Every areal flood warning in 2011

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.