Alert archive / Alabama / Flash Flood Warnings in 2008

Flash Flood Warning 22, NWS Huntsville, AL

July 22, 2008Colbert County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jul 22, 2008, 10:34 PM CDT for Colbert County, Alabama. 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: Jul 22, 2008, 10:34 PM CDT (03:34 UTC)
Expired: Jul 23, 2008, 1:30 AM CDT
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

County Colbert County, AL

The radar

The Columbus AFB radar (KGWX), 101 km from the middle of the area, began a volume at 03:34 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 00:00Z, 3.6 hours before the alert went out and 194 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: 305 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 99 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 flash 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 flash flood warning went out at Jul 22, 9:21 PM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Jul 22, 9:21 PM CDT, 1 hour 13 minutes before

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Hazardous weather outlook, Jul 22, 8:44 PM CDT, 1 hour 50 minutes before

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In the hours before

Special weather statement, Jul 22, 6:17 PM CDT, 4 hours 17 minutes before

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Local storm report, Jul 22, 7:26 PM CDT, 3 hours 8 minutes before

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Local storm report, Jul 22, 7:30 PM CDT, 3 hours 4 minutes before

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Special weather statement, Jul 22, 7:46 PM CDT, 2 hours 48 minutes before

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Special weather statement, Jul 22, 9:31 PM CDT, 1 hour 3 minutes before

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Special weather statement, Jul 22, 10:23 PM CDT, 11 minutes before

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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 7:05 PM CDT	Severe Thunderstorm Warning	HUN	Colbert	36 min
Jul 22, 7:22 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	38 min
Jul 23, 2:49 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	26 min
Jul 23, 2:49 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	26 min
Jul 23, 3:11 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	34 min
Jul 23, 4:08 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lawrence	38 min
Jul 23, 2:27 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln	33 min

Nearby

Flash Flood Warnings in Alabama, 2008 Every flash flood warning in 2008

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.