Alert archive / Alabama / Flash Flood Warnings in 2022

Flash Flood Warning 8, NWS Huntsville, AL

January 2, 2022DeKalb County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jan 2, 2022, 1:11 AM CST for DeKalb 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: Jan 2, 2022, 1:11 AM CST (07:11 UTC)
Expired: Jan 2, 2022, 4:15 AM CST
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 07:14 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, 7.2 hours before the alert went out and 168 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: 227 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 462 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.6

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 Jan 1, 10:46 PM CST, 2 hours 25 minutes earlier.

Area forecast discussion, Jan 1, 10:46 PM CST, 2 hours 25 minutes before

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Hazardous weather outlook, Jan 1, 9:57 PM CST, 3 hours 14 minutes before

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In the hours before

Local storm report, Jan 1, 10:43 PM CST, 2 hours 28 minutes before

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Local storm report, Jan 1, 10:44 PM CST, 2 hours 27 minutes before

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Local storm report, Jan 1, 10:51 PM CST, 2 hours 20 minutes before

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Special weather statement, Jan 1, 11:29 PM CST, 1 hour 42 minutes before

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Special weather statement, Jan 2, 12:19 AM CST, 52 minutes before

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Local storm report, Jan 2, 12:40 AM CST, 31 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
Jan 1, 6:00 PM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	45 min
Jan 1, 6:28 PM CST	Tornado Warning	HUN	Madison	32 min
Jan 1, 6:55 PM CST	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Madison, Marshall, Morgan	50 min
Jan 1, 7:20 PM CST	Tornado Warning	HUN	Limestone, Madison, Morgan	25 min
Jan 1, 7:40 PM CST	Severe Thunderstorm Warning	HUN	Jackson, Madison	50 min
Jan 1, 8:17 PM CST	Flash Flood Warning	HUN	Colbert, Lauderdale	90 min
Jan 1, 8:25 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	50 min
Jan 1, 8:29 PM CST	Tornado Warning	HUN	Jackson	31 min
Jan 1, 8:38 PM CST	Tornado Warning	HUN	DeKalb, Jackson	26 min
Jan 1, 9:00 PM CST	Special Weather Statement	HUN	Jackson	45 min
Jan 1, 9:03 PM CST	Flash Flood Warning	HUN	Madison	3 hr
Jan 1, 9:42 PM CST	Flash Flood Warning	HUN	Madison	3 hr
Jan 1, 10:21 PM CST	Special Weather Statement	HUN	Jackson, Morgan	39 min
Jan 1, 10:40 PM CST	Flash Flood Warning	HUN	Jackson, Madison, Morgan	2 hr
Jan 1, 11:29 PM CST	Special Weather Statement	HUN	DeKalb	31 min
Jan 2, 12:02 AM CST	Flash Flood Warning	HUN	Madison	5 hr
Jan 2, 12:19 AM CST	Special Weather Statement	HUN	DeKalb, Marshall	41 min
Jan 2, 12:22 AM CST	Flash Flood Warning	HUN	Jackson, Madison	3 hr
Jan 2, 3:27 AM CST	Winter Weather Advisory	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	24 hr
Jan 2, 4:55 AM CST	River Flood Warning	HUN	Madison	17 hr
Jan 2, 5:15 AM CST	Areal Flood Warning	HUN	Madison	3 hr
Jan 2, 11:40 AM CST	Areal Flood Warning	HUN	DeKalb	5 hr
Jan 2, 2:54 PM CST	Winter Storm Warning	HUN	Jackson, Lawrence, Limestone, Madison, Morgan	12 hr
Jan 1, 6:57 PM CST	Severe Thunderstorm Warning	HUN	Franklin	18 min

Nearby

Flash Flood Warnings in Alabama, 2022 Every flash flood warning in 2022

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.