Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Shreveport, LA
NWS Shreveport, LA issued this special weather statement at May 10, 2021, 3:06 PM CDT for Red River County, Texas. 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
- May 10, 2021, 3:06 PM CDT (20:06 UTC)
- Expired
- May 10, 2021, 3:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Shreveport, LA
County Red River County, TX
The radar
The Shreveport radar (KSHV), 174 km from the middle of the area, began a volume at 20:08 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, 8.1 hours before the alert went out and 177 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
- 257 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 552 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.4
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 10, 12:51 PM CDT, 2 hours 15 minutes earlier.
Area forecast discussion, May 10, 12:51 PM CDT, 2 hours 15 minutes before
Area Forecast Discussion...UPDATED National Weather Service Shreveport LA 1251 PM CDT Mon May 10 2021 .AVIATION... IFR with occasional LIFR cigs will persist through much of the 18Z TAF period across much of E TX/N LA, while some slightly drier air backdooring SW will maintain low MVFR cigs across SW AR this afternoon and evening, before they diminish to IFR late tonight. Sct strong/svr convection continues to develop/slide SE into NE TX, but should stay N of the TYR/GGG terminals, but possible affect TXK/SHV by mid to late afternoon. Additional convection may develop farther E across Srn AR before diminishing by early evening. A weak cold front will also seep S into Deep E TX/NCntrl LA this afternoon, possibly sliding S of the area this evening although it may waffle back N a tad Tuesday morning. Sct convection is expected to redevelop by mid to late evening across NE TX/SE OK/SW AR and possibly NW LA, affecting all terminals except LFK. This convection will result in IFR cigs redeveloping across SW AR late this evening/overnight, even as the convection diminishes from W to E by/after daybreak. However, additional convection will develop by mid to late morning across E TX, which will shift E and become numerous by midday through the afternoon Tuesday, maintaining IFR and reduced vsbys over much of the region. NE winds around 10kts this afternoon will only diminish slightly to 5-8kts after 00Z. /15/ && .PREV DISCUSSION... /issued 1113 AM CDT Mon May 10 2021/ SHORT TERM... The morning sfc analysis indicates our weak cold front continuing to ooze S across portions of Lower E TX/NCntrl LA, having shifted just S of the I-20 corridor of E TX and N LA. Some areas of -RA/-DZ too light to be detected by radar has developed near and just behind the front (as indicated by the latest sfc obs), with the 12Z KSHV raob depicting the moisture profile confined to the lowest 9kft. However, the upper air analysis depicts the lingering H850 trough in VC of the Red River of Srn OK/N TX extending into the Nrn sections of SW AR, where sct elevated convection has developed in association with a weak/subtle perturbation in the zonal flow that appears to be traversing the Red River Valley. MUCapes currently range from 1000-2000 J/kg across this area in the presence of steep mid level lapse rates ranging from 7-7.5 C/km, with the 12Z NAM suggesting that some of this elevated instability may advect back ENE into NE TX/SW AR/N LA during the afternoon. Thus, an isolated svr threat (due to hailers) will be possible late this morning through the afternoon mainly N of I-20, as depicted by the 12Z NAM and latest CAMs. Have expanded high chance pops farther E into SW AR/more of E TX, with low and mid chance pops elsewhere, with the higher end pops across Deep E TX/WCntrl LA closest to the front. Did not make much adjustments to max temps other than to lower temps slightly across SE OK/portions of SW AR, with readings likely not rising much during the day. Zone update already out...grids will be available shortly. 15 && .PRELIMINARY POINT TEMPS/POPS... SHV 68 58 66 58 / 30 60 80 80 MLU 66 57 68 59 / 30 60 80 90 DEQ 63 52 60 52 / 50 60 80 60 TXK 63 53 60 56 / 50 60 80 70 ELD 64 53 62 53 / 40 60 80 80 TYR 69 57 66 57 / 40 60 80 80 GGG 69 56 66 57 / 40 60 80 80 LFK 77 63 74 62 / 50 60 80 80 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && 15
Hazardous weather outlook, May 10, 1:55 PM CDT, 1 hour 11 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 155 PM CDT Mon May 10 2021 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-111900- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 155 PM CDT Mon May 10 2021 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... There is a risk for isolated storms today across portions of the region today. While widespread severe weather is not expected at this time, some of the stronger storms may produce large hail, especially north of the Interstate 20 corridor. Brief heavy rain may also result in minor flooding in areas that received heavy rainfall on yesterday. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... Periods of moderate to heavy rainfall will be possible, especially Tuesday and Tuesday night, which may lead to localized flooding. Isolated strong storms also can not be ruled out, with hail and locally gusty winds possible. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters will be needed this afternoon and evening. 20
In the hours before
Local storm report, May 10, 2:16 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
216 PM CDT MON MAY 10 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1253 PM HAIL 2 NNW ROCKY MOUND 33.06N 95.04W
05/10/2021 M1.75 INCH CAMP TX PUBLIC
NEAR LAKE BOB SANDLIN ON CR 2320.
&&
25Local storm report, May 10, 2:26 PM CDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
226 PM CDT MON MAY 10 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0225 PM HAIL 8 ESE LINDEN 32.95N 94.25W
05/10/2021 M1.75 INCH CASS TX PUBLIC
KILDARE COMMUNITY.
&&
25Local storm report, May 10, 2:38 PM CDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
238 PM CDT MON MAY 10 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0159 PM HAIL 1 NW HUGHES SPRINGS 33.01N 94.64W
05/10/2021 M1.75 INCH CASS TX PUBLIC
REPORT FROM MPING: GOLF BALL (1.75 IN.).
&&
25Local storm report, May 10, 2:39 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
239 PM CDT MON MAY 10 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0202 PM HAIL 1 NW HUGHES SPRINGS 33.01N 94.64W
05/10/2021 E1.50 INCH CASS TX PUBLIC
REPORT FROM MPING: PING PONG BALL (1.50
IN.).
&&
25Special weather statement, May 10, 2:53 PM CDT, 13 minutes before
Special Weather Statement National Weather Service Shreveport LA 253 PM CDT Mon May 10 2021 LAZ001-002-TXZ138-102045- Bossier LA-Caddo LA-Harrison TX- 253 PM CDT Mon May 10 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CADDO...SOUTHWESTERN BOSSIER PARISHES IN NORTHWESTERN LOUISIANA AND SOUTHEASTERN HARRISON COUNTIES UNTIL 345 PM CDT... At 253 PM CDT, Doppler radar was tracking a strong thunderstorm near Waskom, or 10 miles east of Marshall, moving east at 30 mph. Penny size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Shreveport, Bossier City, Greenwood, Blanchard, Waskom, Scottsville, Jonesville, Cross Lake, Forbing, Bethany and Leigh. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm 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 3243 9427 3261 9426 3262 9369 3235 9371 TIME...MOT...LOC 1953Z 273DEG 25KT 3252 9417 19
Special weather statement, May 10, 3:06 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Shreveport LA 306 PM CDT Mon May 10 2021 OKZ077-TXZ096-097-102045- McCurtain OK-Bowie TX-Red River TX- 306 PM CDT Mon May 10 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL MCCURTAIN... NORTHWESTERN BOWIE AND RED RIVER COUNTIES UNTIL 345 PM CDT... At 306 PM CDT, Doppler radar was tracking a strong thunderstorm near Bagwell, or 8 miles west of Clarksville, moving east at 45 mph. Penny size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Clarksville, Boxelder, Bogata, Bagwell, Detroit, Avery, Annona, Beaverdams, Lydia, Negley, Harris, Cuthand, English and Bryarly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm 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 3378 9531 3379 9466 3341 9466 3347 9531 TIME...MOT...LOC 2006Z 275DEG 41KT 3359 9521 19
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 8:20 PM CDT | Special Weather Statement | SHV | Angelina | 40 min |
| May 9, 8:23 PM CDT | River Flood Warning | SHV | Anderson, Cherokee, Houston, Trinity | 35 days |
| May 9, 8:26 PM CDT | River Flood Warning | SHV | Sabine, San Augustine | 3 days |
| May 9, 11:10 PM CDT | Special Weather Statement | SHV | Nacogdoches | 50 min |
| May 10, 12:04 AM CDT | Special Weather Statement | SHV | Angelina | 41 min |
| May 10, 12:15 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Franklin, Titus, Upshur, Wood | 45 min |
| May 10, 12:41 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Franklin, Morris, Red River, Titus | 49 min |
| May 10, 1:00 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Cass, Marion, Morris, Titus, Upshur | 45 min |
| May 10, 1:08 PM CDT | Special Weather Statement | SHV | Franklin | 37 min |
| May 10, 1:29 PM CDT | Special Weather Statement | SHV | Titus | 46 min |
| May 10, 1:44 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Cass, Marion, Morris, Titus | 46 min |
| May 10, 2:25 PM CDT | Severe Thunderstorm Warning | SHV | Cass, Harrison, Marion | 65 min |
| May 10, 5:20 PM CDT | Special Weather Statement | SHV | Harrison | 40 min |
| May 10, 6:29 PM CDT | Special Weather Statement | SHV | Morris, Titus | 46 min |
| May 9, 7:02 PM CDT | Special Weather Statement | SHV | Grant, Natchitoches | 58 min |
| May 9, 7:17 PM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Webster | 58 min |
| May 9, 7:22 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Sabine | 53 min |
| May 9, 8:05 PM CDT | Special Weather Statement | SHV | Grant | 55 min |
| May 9, 8:14 PM CDT | Special Weather Statement | SHV | Claiborne, Union | 61 min |
| May 9, 8:15 PM CDT | Special Weather Statement | SHV | Webster | 60 min |
| May 10, 2:53 PM CDT | Special Weather Statement | SHV | Caddo | 52 min |
| May 10, 3:30 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 45 min |
| May 10, 3:45 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, De Soto, Webster | 45 min |
| May 10, 3:54 PM CDT | Special Weather Statement | SHV | Webster | 66 min |
| May 10, 3:58 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Claiborne, Webster | 25 min |
| May 10, 4:16 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, Natchitoches, Red River, Webster and 1 more | 44 min |
| May 10, 4:56 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Natchitoches, Winn | 53 min |
| May 10, 5:30 PM CDT | Special Weather Statement | SHV | Grant, LaSalle | 60 min |
| May 10, 6:28 PM CDT | Special Weather Statement | SHV | LaSalle | 47 min |
| May 10, 6:36 PM CDT | Special Weather Statement | SHV | De Soto, Red River | 39 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.