Alert archive / Alabama / Flash Flood Warnings in 2020

Flash Flood Warning 1, NWS Huntsville, AL

February 5, 2020Limestone County, Madison County, Alabama; Lincoln County, Tennessee

NWS Huntsville, AL issued this flash flood warning at Feb 5, 2020, 10:18 PM CST for Limestone County, Madison County, Alabama; Lincoln County, Tennessee. It was in force for 104 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: Feb 5, 2020, 10:18 PM CST (04:18 UTC)
Expired: Feb 6, 2020, 12:02 AM CST
In force: 104 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Limestone County, AL, Madison County, AL, Lincoln County, TN

The radar

The Northeast Alabama radar (KHTX), 57 km from the middle of the area, began a volume at 04:17 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 00:00Z, 4.3 hours before the alert went out and 137 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: 47 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 Feb 5, 5:11 PM CST, 5 hours 7 minutes earlier.

Area forecast discussion, Feb 5, 5:11 PM CST, 5 hours 7 minutes before

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Hazardous weather outlook, Feb 5, 9:59 PM CST, 19 minutes before

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In the hours before

Local storm report, Feb 5, 6:52 PM CST, 3 hours 26 minutes before

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Special weather statement, Feb 5, 7:13 PM CST, 3 hours 5 minutes before

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Special weather statement, Feb 5, 7:18 PM CST, 3 hours before

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Special weather statement, Feb 5, 7:56 PM CST, 2 hours 22 minutes before

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Special weather statement, Feb 5, 7:57 PM CST, 2 hours 21 minutes before

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Special weather statement, Feb 5, 8:52 PM CST, 1 hour 26 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
Feb 5, 6:32 PM CST	Special Weather Statement	HUN	Franklin, Lawrence, Limestone, Madison, Morgan	43 min
Feb 5, 7:08 PM CST	Areal Flood Warning	HUN	Jackson, Lawrence, Limestone, Madison, Morgan	9 hr
Feb 5, 7:18 PM CST	Special Weather Statement	HUN	Cullman, Morgan	42 min
Feb 5, 7:57 PM CST	Special Weather Statement	HUN	Cullman, Jackson, Marshall	48 min
Feb 5, 8:52 PM CST	Special Weather Statement	HUN	Jackson	23 min
Feb 5, 9:20 PM CST	Areal Flood Warning	HUN	Cullman, DeKalb, Jackson, Madison, Marshall, Morgan	3 hr
Feb 5, 10:36 PM CST	River Flood Warning	HUN	Colbert, Lauderdale	17 days
Feb 5, 10:42 PM CST	River Flood Warning	HUN	Madison, Marshall, Morgan	16 days
Feb 5, 11:52 PM CST	Areal Flood Warning	HUN	Cullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more	33 hr
Feb 6, 1:10 AM CST	Special Weather Statement	HUN	DeKalb	35 min
Feb 6, 7:43 AM CST	Flash Flood Warning	HUN	DeKalb	3 hr
Feb 6, 8:10 AM CST	Areal Flood Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence	10 hr
Feb 6, 3:25 PM CST	Areal Flood Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence	12 hr
Feb 5, 6:29 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	46 min
Feb 5, 7:13 PM CST	Special Weather Statement	HUN	Franklin, Lincoln, Moore	47 min
Feb 5, 7:56 PM CST	Special Weather Statement	HUN	Franklin	49 min

Nearby

Flash Flood Warnings in Alabama, 2020 Flash Flood Warnings in Tennessee, 2020 Every flash flood warning in 2020

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.