Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 80, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 27, 1990, 9:20 PM CDT for Claiborne Parish, Lincoln Parish, Louisiana. It was in force for 55 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 27, 1990, 9:20 PM CDT (02:20 UTC)
- Expired
- Apr 27, 1990, 10:15 PM CDT
- In force
- 55 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Claiborne Parish, LA, Lincoln Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 9:26 PM CDT | Hail 0.88 | Claiborne, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 00:00Z, 2.3 hours before the alert went out and 171 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
- 1368 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1155 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Apr 27, 5:36 PM CDT, 3 hours 44 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
530 PM CDT FRI APR 27 1990
REPORTS FOR APRIL 27 1990
CNTY/PARISH ST TIME CDT EVENT
CASS TX 445 PM GOLF BALL SIZE HAIL OCCURRED WEST
OF LINDEN TEXAS.
CASS TX 455 PM MARBLE SIZE HAIL OCCURRED LINDEN-
AVENGER TEXAS.
CASS TX 516 PM 3/4 INCH SIZE HAIL COVERED THE GRbOUND
ALONG HIGHWAY 59 SOUTH OF LINDEN TEXAS.
NOTE: THIS STORM HAS CYCLES OF PRODUCING SMALL HAIL THEN LARGE HAIL.The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:23 PM CDT | Tornado Warning | SHV | Bossier, Caddo | 67 min |
| Apr 27, 7:38 PM CDT | Tornado Warning | SHV | De Soto | 97 min |
| Apr 27, 8:05 PM CDT | Tornado Warning | SHV | Sabine | 85 min |
| Apr 27, 8:32 PM CDT | Tornado Warning | SHV | Bossier, Caddo | 58 min |
| Apr 27, 8:42 PM CDT | Tornado Warning | SHV | Bienville, Red River, Webster | 63 min |
| Apr 27, 8:51 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches | 69 min |
| Apr 27, 9:20 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Winn | 55 min |
| Apr 27, 10:47 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Madison, Tensas | 58 min |
| Apr 27, 7:15 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Rusk | 60 min |
| Apr 27, 7:15 PM CDT | Severe Thunderstorm Warning | SHV | Shelby | 60 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.