Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

December 11, 2021Shelby County, Texas

NWS Shreveport, LA issued this special weather statement at Dec 11, 2021, 2:45 AM CST for Shelby County, Texas. 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: Dec 11, 2021, 2:45 AM CST (08:45 UTC)
Expired: Dec 11, 2021, 3:30 AM CST
In force: 45 min
Issued by: NWS Shreveport, LA
Hail: 0.00 in
Wind: 40

County Shelby County, TX

The radar

The Shreveport radar (KSHV), 75 km from the middle of the area, began a volume at 08:48 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

Shreveport, LA (KSHV), launched 00:00Z, 8.8 hours before the alert went out and 79 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: 1338 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 334 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 10.4

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 Shreveport, LA wrote its last area forecast discussion before this special weather statement went out at Dec 11, 2:22 AM CST, 23 minutes earlier.

Area forecast discussion, Dec 11, 2:22 AM CST, 23 minutes before

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Hazardous weather outlook, Dec 10, 5:26 AM CST, 21 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
526 AM CST Fri Dec 10 2021

ARZ050-051-059>061-072-073-LAZ004>006-011>014-017>022-OKZ077-
TXZ165>167-111200-
Sevier-Howard-Little River-Hempstead-Nevada-Columbia-Union-
Claiborne-Lincoln-Red River-Bienville-Jackson-Ouachita-Sabine-
Natchitoches-Winn-Grant-Caldwell-La Salle-McCurtain-Angelina-
San Augustine-
526 AM CST Fri Dec 10 2021

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma and east Texas.

.DAY ONE...Today and Tonight...

Isolated to widely scattered thunderstorms will be possible across
much of the area today. However, thunderstorms are expected to
increase in intensity and coverage this evening and tonight as a
strong cold front approaches. Some storms could be severe.
Damaging winds, large hail, and isolated tornadoes will be
possible, especially across Louisiana and Southwest Arkansas. The
cold front and the line of storms will move southeast across the
area during the overnight hours and into Saturday morning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Thunderstorms will be possible across North Central Louisiana on
Saturday. One or two storms could be severe through mid to late
Saturday morning. Damaging winds and large hail will be the
primary threats after sunrise Saturday.

After a few dry days, thunderstorm chances will return to the area
late Wednesday and into Thursday.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters may be needed this evening and into
Saturday morning.

ARZ070-071-LAZ001>003-010-TXZ096-097-108>112-124>126-136>138-
149>153-111200-
Miller-Lafayette-Caddo-Bossier-Webster-De Soto-Red River-Bowie-
Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-
Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-
526 AM CST Fri Dec 10 2021

This Hazardous Weather Outlook is for portions of southwest
Arkansas, northwest Louisiana, east Texas and northeast Texas.

.DAY ONE...Today and Tonight...

Isolated to widely scattered thunderstorms will be possible across
much of the area today. However, thunderstorms are expected to
increase in intensity and coverage this evening and tonight as a
strong cold front approaches. Some storms could be severe.
Damaging winds, large hail, and isolated tornadoes will be
possible, especially across Louisiana and Southwest Arkansas. The
cold front and the line of storms will move southeast across the
area during the overnight hours and into Saturday morning.

Gusty southerly winds of 15 to 20 mph with gusts between 25 and 30
mph are expected this afternoon. Therefore, a Lake Wind Advisory
is in effect from noon until 6 PM CST this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

After a few dry days, thunderstorm chances will return to the
area late Wednesday and into Thursday.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters may be needed this evening and into
Saturday morning.

09

In the hours before

Local storm report, Dec 11, 12:40 AM CST, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1240 AM CST SAT DEC 11 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1138 PM     TSTM WND DMG     2 E ROSSTON             33.59N 93.24W
12/10/2021                   NEVADA             AR   LAW ENFORCEMENT

            SMALL TREES DOWN ALONG HWY 278 TOWARD THE
            OUACHITA COUNTY BORDER.

&&

16

Special weather statement, Dec 11, 1:15 AM CST, 1 hour 30 minutes before

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Special weather statement, Dec 11, 2:06 AM CST, 39 minutes before

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Special weather statement, Dec 11, 2:16 AM CST, 29 minutes before

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Special weather statement, Dec 11, 2:31 AM CST, 14 minutes before

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Special weather statement, Dec 11, 2:45 AM CST, 0 minutes before

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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 10, 6:15 PM CST	Severe Thunderstorm Warning	SHV	Bowie, Franklin, Red River, Titus	60 min
Dec 10, 7:05 PM CST	Severe Thunderstorm Warning Considerable damage threat	SHV	Bowie, Red River	55 min
Dec 10, 10:06 PM CST	Special Weather Statement	SHV	Bowie	24 min
Dec 10, 10:20 PM CST	Severe Thunderstorm Warning	SHV	Bowie	55 min
Dec 10, 10:53 PM CST	Severe Thunderstorm Warning	SHV	Camp, Cass, Harrison, Marion, Morris, Titus and 1 more	67 min
Dec 10, 11:30 PM CST	Severe Thunderstorm Warning	SHV	Cass	45 min
Dec 10, 11:56 PM CST	Severe Thunderstorm Warning	SHV	Harrison, Marion	49 min
Dec 11, 2:16 AM CST	Special Weather Statement	SHV	Angelina	44 min
Dec 11, 4:02 AM CST	Special Weather Statement	SHV	Sabine	43 min
Dec 11, 2:28 PM CST	Freeze Warning	SHV	Cherokee, Nacogdoches, Panola, Rusk, Shelby, Smith	19 hr
Dec 11, 12:09 AM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne, Webster	51 min
Dec 11, 1:15 AM CST	Special Weather Statement	SHV	Claiborne, Webster	45 min
Dec 11, 2:06 AM CST	Special Weather Statement	SHV	Union	24 min
Dec 11, 2:31 AM CST	Special Weather Statement	SHV	Lincoln	44 min
Dec 11, 4:44 AM CST	Special Weather Statement	SHV	Caldwell, Grant, LaSalle	61 min
Dec 10, 7:30 PM CST	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Nevada, Sevier	45 min
Dec 10, 8:00 PM CST	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	45 min
Dec 10, 8:28 PM CST	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Nevada	62 min
Dec 10, 9:08 PM CST	Flash Flood Warning Considerable damage threat	SHV	Hempstead	4 hr
Dec 10, 9:22 PM CST	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	29 min
Dec 10, 10:58 PM CST	Severe Thunderstorm Warning	SHV	Hempstead, Lafayette, Nevada	62 min

Nearby

Special Weather Statements in Texas, 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.