Alert archive / Alabama / Flash Flood Warnings in 2023

Flash Flood Warning 29, NWS Huntsville, AL

December 9, 2023DeKalb County, Jackson County, Alabama

NWS Huntsville, AL issued this flash flood warning at Dec 9, 2023, 10:52 PM CST for DeKalb County, Jackson County, Alabama. It was in force for 105 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: Dec 9, 2023, 10:52 PM CST (04:52 UTC)
Expired: Dec 10, 2023, 12:37 AM CST
In force: 105 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties DeKalb County, AL, Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 04:52 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, 4.9 hours before the alert went out and 179 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: 821 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 911 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.7

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 Dec 9, 9:28 PM CST, 1 hour 24 minutes earlier.

Area forecast discussion, Dec 9, 9:28 PM CST, 1 hour 24 minutes before

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In the hours before

Local storm report, Dec 9, 9:42 PM CST, 1 hour 10 minutes before

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Special weather statement, Dec 9, 9:58 PM CST, 54 minutes before

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Local storm report, Dec 9, 10:08 PM CST, 44 minutes before

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Local storm report, Dec 9, 10:21 PM CST, 31 minutes before

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Special weather statement, Dec 9, 10:25 PM CST, 27 minutes before

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Local storm report, Dec 9, 10:44 PM CST, 8 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 9, 6:13 PM CST	Special Weather Statement	HUN	Colbert	47 min
Dec 9, 6:28 PM CST	Tornado Warning	HUN	Lauderdale	32 min
Dec 9, 6:35 PM CST	Special Weather Statement	HUN	Colbert	40 min
Dec 9, 6:38 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin	37 min
Dec 9, 6:42 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	33 min
Dec 9, 7:07 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone	23 min
Dec 9, 7:18 PM CST	Special Weather Statement	HUN	Lawrence	42 min
Dec 9, 7:22 PM CST	Special Weather Statement	HUN	Franklin	38 min
Dec 9, 8:33 PM CST	Special Weather Statement	HUN	Lawrence	42 min
Dec 9, 8:42 PM CST	Special Weather Statement	HUN	Morgan	48 min
Dec 9, 9:05 PM CST	Special Weather Statement	HUN	Madison	40 min
Dec 9, 9:08 PM CST	Special Weather Statement	HUN	Madison	52 min
Dec 9, 9:11 PM CST	Special Weather Statement	HUN	Morgan	49 min
Dec 9, 9:58 PM CST	Special Weather Statement	HUN	Cullman, Jackson	32 min
Dec 9, 10:25 PM CST	Special Weather Statement	HUN	Cullman, Jackson, Marshall	50 min
Dec 9, 10:37 PM CST	Areal Flood Warning	HUN	Jackson, Marshall	3 hr
Dec 9, 7:20 PM CST	Special Weather Statement	HUN	Lincoln	40 min
Dec 9, 7:57 PM CST	Special Weather Statement	HUN	Lincoln, Moore	33 min
Dec 9, 8:30 PM CST	Special Weather Statement	HUN	Lincoln, Moore	45 min

Nearby

Flash Flood Warnings in Alabama, 2023 Every flash flood warning in 2023

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.