Alert archive / Texas / Freeze Warnings in 2021
Freeze Warning 2, NWS Shreveport, LA
NWS Shreveport, LA issued this freeze warning at Apr 20, 2021, 1:23 PM CDT for 7 counties in Texas; 6 counties in Arkansas; McCurtain County, Oklahoma. It took effect at Apr 21, 2021, 3:00 AM CDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2021, 1:23 PM CDT (18:23 UTC)
- In effect from
- Apr 21, 2021, 3:00 AM CDT
- Expired
- Apr 21, 2021, 9:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Shreveport, LA
Counties Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Sevier County, AR, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Shreveport radar (KSHV), 128 km from the middle of the area, began a volume at 18:22 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
Shreveport, LA (KSHV), launched 12:00Z, 6.4 hours before the alert went out and 129 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1980 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
700 WWUS74 KSHV 201823 NPWSHV URGENT - WEATHER MESSAGE National Weather Service Shreveport LA 123 PM CDT Tue Apr 20 2021 ARZ050-051-059-060-070-071-OKZ077-TXZ096-097-108>112-210230- /O.NEW.KSHV.FZ.W.0002.210421T0800Z-210421T1400Z/ /O.CON.KSHV.LW.Y.0015.210420T1900Z-210421T0300Z/ Sevier-Howard-Little River-Hempstead-Miller-Lafayette-McCurtain- Red River-Bowie-Franklin-Titus-Camp-Morris-Cass- Including the cities of De Queen, Nashville, Mineral Springs, Dierks, Ashdown, Hope, Texarkana, Stamps, Lewisville, Bradley, Idabel, Broken Bow, Clarksville, Bogata, Mount Vernon, Mount Pleasant, Pittsburg, Daingerfield, Lone Star, Naples, Omaha, Atlanta, Linden, Hughes Springs, and Queen City 123 PM CDT Tue Apr 20 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM CDT WEDNESDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30 expected. For the Lake Wind Advisory, Northwest winds 10 to 20 mph are expected with gusts of 25 to 30 mph associated with a strong cold front. * WHERE...Portions of southeast Oklahoma, southwest Arkansas and northeast Texas. * WHEN...For the Freeze Warning, from 3 AM to 9 AM CDT Wednesday. For the Lake Wind Advisory, until 10 PM CDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ LAZ001-002-TXZ124>126-136>138-149>151-210230- /O.CON.KSHV.LW.Y.0015.210420T1900Z-210421T0300Z/ Caddo-Bossier-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee- Rusk-Panola- Including the cities of Shreveport, Bossier City, Mineola, Winnsboro, Quitman, Hawkins, Gilmer, Big Sandy, Jefferson, Tyler, Longview, Marshall, Jacksonville, Rusk, Henderson, and Carthage 123 PM CDT Tue Apr 20 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northwest winds 10 to 20 mph are expected with gusts of 25 to 30 mph will be associated with a strong cold front. * WHERE...Portions of southeast Oklahoma, southwest Arkansas, northeast Texas and northwest Louisiana. * WHEN...From 2 PM this afternoon to 10 PM CDT this evening. * IMPACTS...Strong winds will build rough waves on area lakes and open waters which will create hazardous conditions for small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. && $$ 44
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 4:40 AM CDT | Lake Wind Advisory | SHV | Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 10 more | 17 hr |
Nearby
Freeze Warnings in Texas, 2021Freeze Warnings in Arkansas, 2021Freeze Warnings in Oklahoma, 2021Every freeze warning 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.