Alert archive / Alabama / Flash Flood Warnings in 2010

Flash Flood Warning 38, NWS Huntsville, AL

July 16, 2010Cullman County, Morgan County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jul 16, 2010, 3:35 PM CDT for Cullman County, Morgan County, Alabama. It was in force for 81 min. 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 16, 2010, 3:35 PM CDT (20:35 UTC)
Expired: Jul 16, 2010, 4:56 PM CDT
In force: 81 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Cullman County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 100 km from the middle of the area, began a volume at 20:34 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

Nashville Metro, TN (KBNA), launched 12:00Z, 8.6 hours before the alert went out and 206 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: 3144 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 24 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 16, 12:15 PM CDT, 3 hours 20 minutes earlier.

Area forecast discussion, Jul 16, 12:15 PM CDT, 3 hours 20 minutes before

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Hazardous weather outlook, Jul 16, 12:30 PM CDT, 3 hours 5 minutes before

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In the hours before

Special weather statement, Jul 16, 1:33 PM CDT, 2 hours 2 minutes before

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Local storm report, Jul 16, 1:45 PM CDT, 1 hour 50 minutes before

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Special weather statement, Jul 16, 2:31 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jul 16, 2:35 PM CDT, 1 hour before

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Special weather statement, Jul 16, 3:18 PM CDT, 17 minutes before

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Special weather statement, Jul 16, 3:30 PM CDT, 5 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 16, 3:19 AM CDT	Heat Advisory	HUN	Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 2 more	12 hr
Jul 16, 11:59 AM CDT	Special Weather Statement	HUN	Colbert	61 min
Jul 16, 1:08 PM CDT	Special Weather Statement	HUN	Franklin	67 min
Jul 16, 1:33 PM CDT	Special Weather Statement	HUN	Lawrence	57 min
Jul 16, 2:31 PM CDT	Special Weather Statement	HUN	Morgan	59 min
Jul 16, 2:35 PM CDT	Special Weather Statement	HUN	Cullman	55 min
Jul 16, 3:18 PM CDT	Special Weather Statement	HUN	Limestone	42 min
Jul 16, 3:30 PM CDT	Special Weather Statement	HUN	Cullman, Morgan	60 min
Jul 16, 5:40 PM CDT	Special Weather Statement	HUN	DeKalb	65 min

Nearby

Flash Flood Warnings in Alabama, 2010 Every flash flood warning in 2010

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.