Alert archive / Louisiana / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 21, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Aug 2, 1986, 3:03 PM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Aug 2, 1986, 3:03 PM CDT (20:03 UTC)
- Expired
- Aug 2, 1986, 4:00 PM CDT
- In force
- 57 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Lafourche Parish, LA, Terrebonne Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Boothville, LA (KBVE), launched 12:00Z, 8.1 hours before the alert went out and 119 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
- 3693 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 998 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAAOO KNEW 022003
SVRNEW
LAC057-109-022100-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
303 PM CDT SAT AUG 2 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING PARISHES:
IN SOUTHEAST LOUISIANA
..LAFOURCHE..TERREBONNE
RADAR INDICATES A CLUSTER OF VERY HEAVY THUNDERSTORMS EXTENDING FROM
THIBODAUX SOUTHEAST TO GOLDEN MEADOWS MOVING SOUTH AT ABOUT 20 MPH.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH,
DESTRUCTIVE HAIL, DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOU8R
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.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, Aug 2, 2:11 PM CDT, 52 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
210 PM CDT SAT AUG 2 1986
STORM REPORT...
THE FOLLOWING REPORTS OCCURRED IN ST. HELENA PARISH...
1208 PM...GREENSBURG SHERIFFS OFFICE REPORTED SEVERAL TREES DOWN IN
THE EASLEYVILLE COMMUNITY...IN THE NORTHEAST PART OF THE
PARISH...AND A LARGE TREE DOWN IN THE NORTHWEST PART OF THE
PARISH.
1305 PM...POWER LINES DOWN ALONG HIGHWAY 1048 WEST OF GREENSBURG...AND
A LIGHT POLE AND SEVERAL TREES DOWN ALONG HIGHWAY 449 JUST
SOUTH OF PINE GROVE. NO INJURIES REPORTED.Special weather statement, Aug 2, 2:31 PM CDT, 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 230 PM CDT SAT AUG 2 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR LIVINGSTON AND ASCENSION PARISHES OF EAST CENTRAL LOUISIANA UNTIL 7 PM CDT THIS EVENING... OTHER PARISHES THAT WERE IN THE WATCH ARE NOW CLEARED... RADAR SHOWED A BAND OF VERY STRONG THUNDERSTORMS ACROSS ASCENSION AND THE SOUTH HALF OF LIVINGSTON PARISHES EXTENDING EAST INTO MISSISSIPPI. MOVEMENT WAS TO THE SOUTHEAST AT 25 MPH. AS THESE THUNDERSTORM CONTINUE THROUGH PARTS OF EAST CENTRAL LOUISIANA.. THEY WILL PRODUCE STRONG GUSTY WINDS..DANGEROUS LIGHTNING STRIKES AND HEAVY RAINS. PEOPLE IN EAST CENTRAL LOUISIANA SHOULD STAY TUNED TO LOCAL RADIO/T V OR NOAA WEATHER RADIO FOR THE LATEST INFORMATION. ADDITIONAL STATEMENTS WILL BE ISSUED AS NEEDED.
Special weather statement, Aug 2, 3:00 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 300 PM CDT SAT AUG 2 1986 ...THE SEVERE THUNDERSTORM WATCH FOR LIVINGSTON AND ASCENSION PARISHES OF EAST CENTRAL LOUISIANA HAS BEEN CANCELL,ED. PEOPLE IN EAST CENTRAL LOUISIANA MAY RESUME NORMAL ACTIVITIES.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:06 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 54 min |
| Aug 2, 12:15 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena | 45 min |
| Aug 2, 12:21 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 39 min |
| Aug 2, 12:58 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 62 min |
| Aug 2, 1:58 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 62 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1986Every severe thunderstorm warning in 1986
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.