Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 1, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Feb 20, 1989, 1:05 PM CST for Catahoula 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
- Feb 20, 1989, 1:05 PM CST (19:05 UTC)
- Expired
- Feb 20, 1989, 2:00 PM CST
- In force
- 55 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Catahoula 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 |
|---|---|---|---|
| Feb 20, 2:10 PM CST | Tornado F1 | Catahoula, 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
Jackson, MS (KJAN), launched 12:00Z, 7.1 hours before the alert went out and 182 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
- 600 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 247 m²/s²
- 0-3 km storm-relative helicity
- 311 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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
Special weather statement, Feb 20, 8:38 AM CST, 4 hours 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 840 AM CST MON FEB 20 1989 ...A DENSE FOG ADVISORY IS IN EFFECT FOR EAST CENTRAL LOUISIANA... DENSE FOG HAS FORMED OVER PART OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METROPOLITAN AREA. VISIBILITY WILL BE REDUCED TO NEAR ZERO IN MANY LOCATIONS ESPECIALLY ALONG AREA RIVERS AND THEIR TRIBUTARIES. MOTORIST AND BOATERS ARE ADVISED TO EXERCISE CAUTION TRAVELING THROUGH FOGGY AREAS. VISIBILITY SHOULD IMPROVE BEFORE NOON.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 1:50 PM CST | Tornado Warning | LIX | Catahoula, Concordia | 60 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1989Every severe thunderstorm warning in 1989
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.