Alert archive / Alabama / Areal Flood Warnings in 2011
Areal Flood Warning 13, NWS Huntsville, AL
NWS Huntsville, AL issued this areal flood warning at Mar 9, 2011, 5:03 PM CST for Marshall County, Alabama. It was in force for 15 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 9, 2011, 5:03 PM CST (23:03 UTC)
- Expired
- Mar 10, 2011, 7:50 AM CST
- In force
- 15 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Marshall County, AL
The radar
The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 23:04 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
Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 139 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 467 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 743 m²/s²
- 0-3 km storm-relative helicity
- 1250 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Huntsville, AL wrote its last area forecast discussion before this areal flood warning went out at Mar 9, 3:50 PM CST, 1 hour 13 minutes earlier.
Area forecast discussion, Mar 9, 3:50 PM CST, 1 hour 13 minutes before
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Local storm report, Mar 9, 12:27 PM CST, 4 hours 36 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 10:36 PM CST | Flash Flood Warning | HUN | Madison | 6 hr |
| Mar 8, 10:44 PM CST | River Flood Warning | HUN | Madison, Marshall, Morgan | 14 hr |
| Mar 9, 2:14 AM CST | Flash Flood Warning | HUN | Cullman | 6 hr |
| Mar 9, 4:41 AM CST | Areal Flood Warning | HUN | Madison | 6 hr |
| Mar 9, 6:05 AM CST | Flash Flood Warning | HUN | Lawrence, Morgan | 3 hr |
| Mar 9, 6:35 AM CST | Flash Flood Warning | HUN | DeKalb | 5 hr |
| Mar 9, 7:12 AM CST | Areal Flood Warning | HUN | Jackson, Madison, Marshall | 6 hr |
| Mar 9, 7:54 AM CST | Areal Flood Warning | HUN | Cullman | 5 hr |
| Mar 9, 9:21 AM CST | River Flood Warning | HUN | Jackson, Madison, Marshall | 66 hr |
| Mar 9, 9:26 AM CST | River Flood Warning | HUN | Madison | 28 hr |
| Mar 9, 10:02 AM CST | Special Weather Statement | HUN | DeKalb | 58 min |
| Mar 9, 12:00 PM CST | Areal Flood Warning | HUN | DeKalb | 6 hr |
| Mar 9, 2:13 PM CST | Areal Flood Warning | HUN | Marshall | 3 hr |
| Mar 9, 5:51 PM CST | Special Weather Statement | HUN | Madison, Morgan | 39 min |
| Mar 9, 5:59 PM CST | River Flood Warning | HUN | Madison, Marshall, Morgan | 57 hr |
Nearby
Areal Flood Warnings in Alabama, 2011Every 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.