Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 185, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Aug 12, 2021, 7:10 PM CDT for Natchitoches Parish, Louisiana. It was in force for 35 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 12, 2021, 7:10 PM CDT (00:10 UTC)
- Expired
- Aug 12, 2021, 7:45 PM CDT
- In force
- 35 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Natchitoches Parish, LA
The radar
The Ft Polk radar (KPOE), 62 km from the middle of the area, began a volume at 00:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 12, 7:21 PM CDT | HAIL 0.88 | 2 Sw Natchitoches, LA | NICKEL SIZED HAIL REPORTED AT PARCH NATCHITOCHES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.2 hours before the alert went out and 106 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
- 1821 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
877 WUUS54 KSHV 130010 SVRSHV LAC069-130045- /O.NEW.KSHV.SV.W.0185.210813T0010Z-210813T0045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Shreveport LA 710 PM CDT Thu Aug 12 2021 The National Weather Service in Shreveport has issued a * Severe Thunderstorm Warning for... Central Natchitoches Parish in northwestern Louisiana... * Until 745 PM CDT. * At 709 PM CDT, a severe thunderstorm was located just south of Natchitoches, moving northwest at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Natchitoches, Provencal, Natchez and Hagewood. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3170 9298 3162 9307 3167 9329 3183 9318 TIME...MOT...LOC 0007Z 130DEG 7KT 3170 9308 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 15
1 follow-up statement
018 WWUS54 KSHV 130037 SVSSHV Severe Weather Statement National Weather Service Shreveport LA 737 PM CDT Thu Aug 12 2021 LAC069-130045- /O.CON.KSHV.SV.W.0185.000000T0000Z-210813T0045Z/ Natchitoches LA- 737 PM CDT Thu Aug 12 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR CENTRAL NATCHITOCHES PARISH... At 737 PM CDT, a severe thunderstorm was located 5 miles west of Natchitoches, moving northwest at 10 mph. This storm has begun to weaken, but still may produce locally gusty winds along Interstate 49 northwest of Natchitoches during the next 10 minutes. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Natchitoches and Hagewood. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3178 9312 3170 9317 3171 9326 3183 9318 TIME...MOT...LOC 0035Z 121DEG 10KT 3175 9320 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 15
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.