Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Shreveport, LA
NWS Shreveport, LA issued this special weather statement at Dec 18, 2021, 7:02 AM CST for Smith County, Texas. It was in force for 43 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 18, 2021, 7:02 AM CST (13:02 UTC)
- Expired
- Dec 18, 2021, 7:45 AM CST
- In force
- 43 min
- Issued by
- NWS Shreveport, LA
- Hail
- 0.50 in
- Wind
- 50
County Smith County, TX
The radar
The Shreveport radar (KSHV), 117 km from the middle of the area, began a volume at 13:05 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 12:00Z, 1.0 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 181 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
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</html>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 18, 5:57 AM CST, 1 hour 5 minutes earlier.
Area forecast discussion, Dec 18, 5:57 AM CST, 1 hour 5 minutes before
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</html>Hazardous weather outlook, Dec 18, 4:38 AM CST, 2 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 438 AM CST Sat Dec 18 2021 ARZ073-LAZ001>006-010>014-017>022-TXZ126-136>138-149>153-165>167- 191200- Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant- Caldwell-La Salle-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 438 AM CST Sat Dec 18 2021 This Hazardous Weather Outlook is for portions of south central Arkansas, north central Louisiana, northwest Louisiana, east Texas and northeast Texas. .DAY ONE...Today and Tonight... Scattered thunderstorms will become more widespread across the area today as a strong cold front moves across the region. A few storms could be severe today from this morning through the mid- afternoon hours, mainly south of a line from Tyler to El Dorado. Damaging winds and large hail will be the primary threats. In addition, locally heavy rainfall may result in isolated flooding. Winds will become northerly after the passage of the cold front and will increase in speed to between 15 and 25 mph with occasional higher gusts. Therefore, a Lake Wind Advisory is in effect until 6 PM CST for all of East Texas and portions of extreme Northwest Louisiana. The wind speeds should diminish early this evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday... No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters may be needed today through this afternoon. ARZ050-051-059>061-070>072-OKZ077-TXZ096-097-108>112-124-125- 191200- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-McCurtain-Red River-Bowie-Franklin-Titus-Camp-Morris- Cass-Wood-Upshur- 438 AM CST Sat Dec 18 2021 This Hazardous Weather Outlook is for portions of southwest Arkansas, southeast Oklahoma and northeast Texas. .DAY ONE...Today and Tonight... Scattered thunderstorms will become more widespread across the area today as a strong cold front moves across the region. Locally heavy rainfall may result in isolated flooding. Winds will become northerly after the passage of the cold front and will increase in speed to between 15 and 25 mph with occasional higher gusts. Therefore, a Lake Wind Advisory is in effect until 6 PM CST for all of East Texas, Southeast Oklahoma, and portions of Southwest Arkansas. The wind speeds should diminish early this evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday... Below freezing temperatures are possible across much of the area during the overnight and early morning hours Sunday through Wednesday. Otherwise, no hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters should not be needed through tonight. 09
In the hours before
Special weather statement, Dec 18, 6:28 AM CST, 34 minutes before
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</html>Special weather statement, Dec 18, 7:02 AM CST, 0 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 3:03 AM CST | Lake Wind Advisory | SHV | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more | 15 hr |
| Dec 18, 6:28 AM CST | Special Weather Statement | SHV | Smith | 32 min |
| Dec 18, 7:26 AM CST | Special Weather Statement | SHV | Gregg | 34 min |
| Dec 18, 7:54 AM CST | Special Weather Statement | SHV | Rusk | 36 min |
| Dec 18, 8:00 AM CST | Special Weather Statement | SHV | Rusk | 60 min |
| Dec 18, 8:22 AM CST | Special Weather Statement | SHV | Nacogdoches | 38 min |
| Dec 18, 8:52 AM CST | Special Weather Statement | SHV | Nacogdoches, Panola, Shelby | 38 min |
| Dec 18, 9:38 AM CST | Special Weather Statement | SHV | Shelby | 37 min |
| Dec 18, 11:02 AM CST | Special Weather Statement | SHV | Angelina | 43 min |
| Dec 18, 10:30 AM CST | Special Weather Statement | SHV | Red River | 45 min |
Nearby
Special Weather Statements in Texas, 2021Every 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.