Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Huntsville, AL

February 28, 2011Lauderdale County, Alabama

NWS Huntsville, AL issued this special weather statement at Feb 28, 2011, 7:21 AM CST for Lauderdale County, Alabama. It was in force for 39 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: Feb 28, 2011, 7:21 AM CST (13:21 UTC)
Expired: Feb 28, 2011, 8:00 AM CST
In force: 39 min
Issued by: NWS Huntsville, AL

County Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 130 km from the middle of the area, began a volume at 13:22 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 12:00Z, 1.4 hours before the alert went out and 170 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: 948 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 795 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 404 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Feb 28, 5:30 AM CST, 1 hour 51 minutes earlier.

Area forecast discussion, Feb 28, 5:30 AM CST, 1 hour 51 minutes before

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Hazardous weather outlook, Feb 28, 4:15 AM CST, 3 hours 6 minutes before

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In the hours before

Special weather statement, Feb 28, 7:21 AM CST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
721 AM CST MON FEB 28 2011

ALZ001-281400-
LAUDERDALE-
721 AM CST MON FEB 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR LAUDERDALE COUNTY UNTIL 800 AM
CST...

AT 721 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR PICKWICK DAM...OR 13 MILES SOUTH OF
SAVANNAH...MOVING EAST AT 35 MPH.

WINDS OF 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
 WATERLOO.
 RIVERTON.
 WRIGHT.
 THREET.
 ZIP CITY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM CST MONDAY AFTERNOON
FOR NORTHERN ALABAMA AND CENTRAL TENNESSEE.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3502 8763 3501 8761 3499 8760 3491 8813
      3501 8820 3502 8819
TIME...MOT...LOC 1320Z 255DEG 31KT 3504 8820

70/DD

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 8:18 AM CST	Special Weather Statement	HUN	Lauderdale	42 min
Feb 28, 8:23 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	23 min
Feb 28, 10:30 AM CST	Special Weather Statement	HUN	Lauderdale	45 min
Feb 28, 10:41 AM CST	Special Weather Statement	HUN	Colbert	49 min
Feb 28, 10:47 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin	58 min
Feb 28, 10:57 AM CST	Severe Thunderstorm Warning	HUN	Lauderdale	46 min
Feb 28, 11:09 AM CST	Severe Thunderstorm Warning	HUN	Colbert	35 min
Feb 28, 11:38 AM CST	Special Weather Statement	HUN	Limestone	67 min
Feb 28, 12:04 PM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	56 min
Feb 28, 12:19 PM CST	Tornado Warning	HUN	Jackson, Madison	28 min
Feb 28, 12:41 PM CST	Severe Thunderstorm Warning	HUN	Jackson, Madison, Morgan	49 min
Feb 28, 12:44 PM CST	Tornado Warning	HUN	Jackson	46 min
Feb 28, 1:04 PM CST	Special Weather Statement	HUN	Marshall	26 min
Feb 28, 1:19 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	41 min
Feb 28, 1:24 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	51 min
Feb 28, 1:37 PM CST	Special Weather Statement	HUN	Cullman	38 min
Feb 28, 1:51 PM CST	Tornado Warning	HUN	DeKalb	24 min
Feb 28, 2:14 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	46 min
Feb 28, 2:21 PM CST	Severe Thunderstorm Warning	HUN	Cullman	39 min
Feb 28, 11:48 AM CST	Special Weather Statement	HUN	Lincoln, Moore	42 min
Feb 28, 11:56 AM CST	Tornado Warning	HUN	Lincoln	25 min
Feb 28, 12:07 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	23 min
Feb 28, 12:12 PM CST	Tornado Warning Emergency	HUN	Franklin, Moore	18 min
Feb 28, 12:27 PM CST	Tornado Warning Emergency	HUN	Franklin, Moore	18 min
Feb 28, 12:36 PM CST	Severe Thunderstorm Warning	HUN	Franklin	24 min
Feb 28, 12:45 PM CST	Tornado Warning	HUN	Franklin	15 min

Nearby

Special Weather Statements in Alabama, 2011 Every special weather statement in 2011

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.