Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Shreveport, LA
NWS Shreveport, LA issued this special weather statement at May 28, 2021, 4:18 AM CDT for Smith County, Texas. It was in force for 42 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
- May 28, 2021, 4:18 AM CDT (09:18 UTC)
- Expired
- May 28, 2021, 5:00 AM CDT
- In force
- 42 min
- Issued by
- NWS Shreveport, LA
County Smith County, TX
The radar
The Shreveport radar (KSHV), 135 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
Shreveport, LA (KSHV), launched 00:00Z, 9.3 hours before the alert went out and 144 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
- 686 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1424 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
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 May 28, 12:30 AM CDT, 3 hours 48 minutes earlier.
Area forecast discussion, May 28, 12:30 AM CDT, 3 hours 48 minutes before
Area Forecast Discussion National Weather Service Shreveport LA 1230 AM CDT Fri May 28 2021 .AVIATION... A line of convection will move across the region bringing -TSRA conditions to area terminals through daybreak. Conditions to gradually improve throughout the day with MVFR ceilings after 28/12Z becoming VFR by 28/18Z. Otherwise, southerly winds up to 10 knots this morning to become northwest after 28/14Z, becoming light and variable after 29/00Z. /05/ && .PREV DISCUSSION... /issued 941 PM CDT Thu May 27 2021/ UPDATE... As of the 02Z hour, the squall line at the leading edge of the MCS over Oklahoma is already arriving at the northern edge of McCurtain county. The system is propagating southward more quickly than previous model guidance suggested and looks like it will maintain its forward speed as it enters northeast Texas and northwest Louisiana. Gusty winds of up to 30-40 mph will be possible with this line, and an isolated severe threat cannot be ruled out. Isolated pockets of locally heavy rainfall in already thoroughly saturated areas will present the possibility of localized flash flooding. Thus, PoP grids have been updated to reflect this accelerated arrival of precip, consistent with the 01Z HRRR run. The leading edge of the line is on track to arrive in ELD/SHV/TYR by 06Z and will be exiting our southern regions by 12Z. PoPs will rapidly fall off in the wake of the frontal passage and remain dry through Friday, until moisture begins to return to deep east Texas by 00Z Saturday. Additionally, adjusted overnight lows down a few degrees to reflect the southward intrusion of rain cooled air behind the squall line in the pre-dawn hours. /26/ && .PRELIMINARY POINT TEMPS/POPS... SHV 86 66 78 59 / 40 30 20 0 MLU 86 64 76 56 / 40 20 20 0 DEQ 84 59 77 54 / 30 20 10 0 TXK 84 63 76 56 / 40 20 10 0 ELD 84 59 76 52 / 50 20 10 0 TYR 85 66 78 61 / 40 40 30 0 GGG 84 66 77 59 / 40 40 30 0 LFK 86 69 79 62 / 50 50 50 0 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && 05/26
Hazardous weather outlook, May 27, 1:53 PM CDT, 14 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 153 PM CDT Thu May 27 2021 ARZ050-051-059>061-070>073-LAZ001>004-OKZ077-TXZ096-097-108>112- 124>126-136>138-149>151-281900- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-McCurtain- Red River-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola- 153 PM CDT Thu May 27 2021 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, northwest Louisiana, southeast Oklahoma and northeast Texas. .DAY ONE...This Afternoon and Tonight... By tonight, a linear complex of thunderstorms will become very well organized across the Middle Red River Valley of northeast Texas, southeast Oklahoma, and southwest Arkansas. This linear storm complex will pose a primary damaging wind threat with some bowing structures possible as it propogates southeast into our northwest zones by mid to late evening, then expand farther south down along the I-20 corridor of east Texas and northwest Louisiana through the early morning hours on Friday. Large hail, localized flooding, and an isolated tornado or two also cannot be ruled out. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Showers and thunderstorms will continue across the region Friday through at least the first half of Saturday across our southern zones as a cold front slowly advances south through the region. The threat of some isolated damaging wind gusts will continue on Friday, generally along and south of Interstate 20. Locally heavy rainfall may also continue to pose a flash flood risk in some areas where recent rounds of heavy rainfall have occurred. Beyond Saturday, the remainder of the Memorial Day weekend appears to be quite pleasant with ample sunshine before more widespread showers and thunderstorms return toward the middle of next week. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters may be needed tonight through Friday morning. LAZ005-006-010>014-017>022-TXZ152-153-165>167-281900- Lincoln-Union-De Soto-Red River-Bienville-Jackson-Ouachita-Sabine- Natchitoches-Winn-Grant-Caldwell-La Salle-Nacogdoches-Shelby- Angelina-San Augustine- 153 PM CDT Thu May 27 2021 This Hazardous Weather Outlook is for portions of north central Louisiana, northwest Louisiana and east Texas. .DAY ONE...This Afternoon and Tonight... A linear complex of showers and thunderstorms will be advancing south toward the I-20 corridor after midnight through the early morning hours on Friday. This linear storm complex should slowly weaken with additional southward progress, but strong and gusty winds will remain possible through daybreak on Friday morning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Showers and thunderstorms will continue across the region Friday through at least the first half of Saturday across our southern zones as a cold front slowly advances south through the region. The threat of some isolated damaging wind gusts will continue on Friday, generally along and south of Interstate 20. Locally heavy rainfall may also continue to pose a flash flood risk in some areas where recent rounds of heavy rainfall have occurred. Beyond Saturday, the remainder of the Memorial Day weekend appears to be quite pleasant with ample sunshine before more widespread showers and thunderstorms return toward the middle of next week. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters should not be needed through tonight. 19
In the hours before
Special weather statement, May 28, 1:50 AM CDT, 2 hours 28 minutes before
Special Weather Statement
National Weather Service Shreveport LA
150 AM CDT Fri May 28 2021
ARZ070>073-LAZ002>004-280730-
Lafayette AR-Union AR-Miller AR-Columbia AR-Bossier LA-Claiborne LA-
Webster LA-
150 AM CDT Fri May 28 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL MILLER...
SOUTHWESTERN LAFAYETTE...WESTERN UNION AND COLUMBIA COUNTIES...
NORTHWESTERN WEBSTER...NORTHERN CLAIBORNE AND NORTHERN BOSSIER
PARISHES UNTIL 230 AM CDT...
At 150 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Stephens to 8 miles west of Bradley.
Movement was southeast at 35 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
El Dorado, Magnolia, Springhill, Junction City, McNeil, Haynesville,
Cullen, Plain Dealing, Cotton Valley, Sarepta, Bradley, Taylor,
Emerson, Shongaloo, Smithland, Wesson, Village, Lisbon, Macedonia and
Bussey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3310 9240 3301 9263 3302 9272 3298 9273
3265 9359 3297 9382 3301 9382 3302 9386
3309 9391 3338 9310 3337 9283
TIME...MOT...LOC 0650Z 297DEG 32KT 3341 9298 3311 9380
24Special weather statement, May 28, 3:06 AM CDT, 1 hour 12 minutes before
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</html>Local storm report, May 28, 3:33 AM CDT, 45 minutes before
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</html>Special weather statement, May 28, 4:00 AM CDT, 18 minutes before
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</html>Special weather statement, May 28, 4:18 AM CDT, 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 |
|---|---|---|---|---|
| May 27, 11:30 PM CDT | Special Weather Statement | SHV | Red River | 45 min |
| May 28, 12:17 AM CDT | Special Weather Statement | SHV | Bowie, Cass, Franklin, Morris, Titus | 43 min |
| May 28, 1:03 AM CDT | Special Weather Statement | SHV | Camp, Cass, Franklin, Morris, Titus, Wood | 42 min |
| May 28, 1:46 AM CDT | Special Weather Statement | SHV | Gregg, Harrison, Marion, Smith, Upshur | 44 min |
| May 28, 2:34 AM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola | 41 min |
| May 28, 3:06 AM CDT | Special Weather Statement | SHV | Panola | 39 min |
| May 28, 3:22 AM CDT | Special Weather Statement | SHV | Nacogdoches, Shelby | 38 min |
| May 28, 8:16 AM CDT | Areal Flood Advisory | SHV | Angelina, Cherokee, Nacogdoches | 3 hr |
| May 28, 10:48 AM CDT | River Flood Warning | SHV | Gregg | 23 hr |
| May 28, 3:15 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 6 more | 60 min |
| May 28, 4:00 AM CDT | Special Weather Statement | SHV | Jackson, Ouachita | 45 min |
| May 28, 10:03 AM CDT | River Flood Warning | SHV | Bienville, Bossier, Webster | 21 days |
| May 27, 10:00 PM CDT | Special Weather Statement | SHV | Polk | 30 min |
| May 27, 10:30 PM CDT | Special Weather Statement | SHV | Howard, Sevier | 45 min |
| May 27, 11:24 PM CDT | Special Weather Statement | SHV | Hempstead | 51 min |
| May 28, 12:14 AM CDT | Special Weather Statement | SHV | Hempstead, Lafayette, Miller, Nevada | 46 min |
| May 28, 12:59 AM CDT | Special Weather Statement | SHV | Columbia, Lafayette, Miller, Nevada | 46 min |
| May 28, 1:50 AM CDT | Special Weather Statement | SHV | Columbia, Union | 40 min |
| May 27, 9:21 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 39 min |
| May 27, 9:37 PM CDT | Special Weather Statement | SHV | McCurtain | 38 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.