Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Huntsville, AL

March 28, 2021DeKalb County, Alabama

NWS Huntsville, AL issued this special weather statement at Mar 28, 2021, 6:26 AM CDT for DeKalb County, Alabama. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 28, 2021, 6:26 AM CDT (11:26 UTC)
Expired: Mar 28, 2021, 7:00 AM CDT
In force: 34 min
Issued by: NWS Huntsville, AL

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 62 km from the middle of the area, began a volume at 11:29 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 11.4 hours before the alert went out and 165 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: 471 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1472 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Mar 28, 5:23 AM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Mar 28, 5:23 AM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, Mar 28, 3:06 AM CDT, 3 hours 20 minutes before

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In the hours before

Local storm report, Mar 28, 5:40 AM CDT, 46 minutes before

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Local storm report, Mar 28, 6:04 AM CDT, 22 minutes before

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Local storm report, Mar 28, 6:14 AM CDT, 12 minutes before

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Local storm report, Mar 28, 6:19 AM CDT, 7 minutes before

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Local storm report, Mar 28, 6:20 AM CDT, 6 minutes before

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Special weather statement, Mar 28, 6:26 AM CDT, 0 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
Mar 28, 12:31 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	44 min
Mar 28, 1:13 AM CDT	Special Weather Statement	HUN	Lauderdale	47 min
Mar 28, 1:52 AM CDT	Flash Flood Warning	HUN	Lauderdale	3 hr
Mar 28, 2:39 AM CDT	Special Weather Statement	HUN	Colbert	51 min
Mar 28, 2:45 AM CDT	Special Weather Statement	HUN	Franklin	45 min
Mar 28, 3:09 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lawrence	36 min
Mar 28, 3:34 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Morgan	26 min
Mar 28, 3:58 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison, Morgan	47 min
Mar 28, 4:26 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	34 min
Mar 28, 4:46 AM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison, Morgan	44 min
Mar 28, 5:02 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	28 min
Mar 28, 5:21 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	24 min
Mar 28, 5:30 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	30 min
Mar 28, 5:41 AM CDT	Areal Flood Warning	HUN	Madison	3 hr
Mar 28, 5:57 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	33 min
Mar 27, 7:47 PM CDT	Special Weather Statement	HUN	Franklin	28 min
Mar 28, 2:18 AM CDT	Special Weather Statement	HUN	Lincoln, Moore	42 min

Nearby

Special Weather Statements in Alabama, 2021 Every special weather statement in 2021

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.