Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Huntsville, AL

August 1, 2021Colbert County, Lauderdale County, Alabama

NWS Huntsville, AL issued this special weather statement at Aug 1, 2021, 4:15 AM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 45 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: Aug 1, 2021, 4:15 AM CDT (09:15 UTC)
Expired: Aug 1, 2021, 5:00 AM CDT
In force: 45 min
Issued by: NWS Huntsville, AL

Counties Colbert County, AL, Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 09:17 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

Little Rock, AR (KLZK), launched 00:00Z, 9.3 hours before the alert went out and 180 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: 2334 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1693 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 1, 12:31 AM CDT, 3 hours 44 minutes earlier.

Area forecast discussion, Aug 1, 12:31 AM CDT, 3 hours 44 minutes before

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Hazardous weather outlook, Jul 31, 8:56 PM CDT, 7 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Huntsville AL
856 PM CDT Sat Jul 31 2021

ALZ001>010-016-TNZ076-096-097-011100-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
856 PM CDT Sat Jul 31 2021

This Hazardous Weather Outlook is for north Alabama and portions of
southern middle Tennessee.

.DAY ONE...Tonight...

A few thunderstorms will drop southeast into the area late tonight.
Some of the storms could be strong, and may be capable of gusty
winds, frequent lightning and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

There is a chance of for thunderstorms on Sunday, with lesser
chances on Monday.

Isolated to widely scattered thunderstorms will be possible across
mainly the eastern portion of the outlook area each day from Tuesday
through Friday.

.SPOTTER CALL TO ACTION STATEMENT...

Activation of storm spotters and emergency management personnel is
not anticipated at this time.

In the hours before

Special weather statement, Aug 1, 12:14 AM CDT, 4 hours 1 minute before

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Special weather statement, Aug 1, 12:47 AM CDT, 3 hours 28 minutes before

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Special weather statement, Aug 1, 12:59 AM CDT, 3 hours 16 minutes before

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Special weather statement, Aug 1, 1:27 AM CDT, 2 hours 48 minutes before

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Special weather statement, Aug 1, 4:15 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
Aug 1, 12:11 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	37 min
Aug 1, 12:14 AM CDT	Special Weather Statement	HUN	Limestone, Madison	46 min
Aug 1, 12:47 AM CDT	Special Weather Statement	HUN	Jackson	43 min
Aug 1, 12:59 AM CDT	Special Weather Statement	HUN	Limestone, Madison	31 min
Aug 1, 1:27 AM CDT	Special Weather Statement	HUN	Madison	33 min
Aug 1, 7:08 AM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	52 min
Aug 1, 7:31 AM CDT	Special Weather Statement	HUN	Limestone	44 min
Aug 1, 7:59 AM CDT	Special Weather Statement	HUN	Colbert	46 min
Aug 1, 8:07 AM CDT	Special Weather Statement	HUN	Morgan	38 min
Jul 31, 11:27 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	48 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.