Alert archive / Louisiana / Tornado Warnings in 1986
Tornado Warning 1, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Mar 12, 1986, 3:15 PM CST for Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Mar 12, 1986, 3:15 PM CST (21:15 UTC)
- Expired
- Mar 12, 1986, 4:15 PM CST
- In force
- 60 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
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, 9.3 hours before the alert went out and 156 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
- 345 J/kg
- Mixed-layer CIN
- -314 J/kg
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 122117 TORNEW LAC103-117-122215- BULLETIN...EBS ACTIVATION REQUESTED... TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 315 PM CST WED MAR 12 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING UNTIL 415 PM CST FOR ST TAMMANY AND WASHINGTON PARISHES IN SOUTHEAST LOUISIANA. AT 310 PM CST RADAR INDICATES A POSSIBLE TORNADO JUST WEST OF COVINGTON IN ST TAMMANY PARISH. THE STORM IS MOVING NORTHEAST AT 45 MPH AND WILL MOVE ACROSS NORTHWEST PORTION OF ST TAMMANY PARISH AND SOUTHEAST PORTION OF WASHINGTON PARISH. PEOPLE IN THE PATH OF THIS STORM SHOULD SEEK SAFE SHELTER IMMEDIATELY.
What forecasters said that day
The local office's own words before this tornado 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, Mar 12, 11:49 AM CST, 3 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1150 AM CST WED MAR 12 1986 ...CLUSTERS OF THUNDERSTORMS CONTINUED OVER ASCENSION..EAST BATON ROUGE AND IBERVILLE PARISHES... AT 1145 AM RADAR SHOWED THUNDERSTORMS BETWEEN BATON ROUGE..PLAQUEMINE AND DONALDSONVILLE LOUISIANA. THE THUNDERSTORMS WERE MOVING RAPIDLY NORTH..HOWEVER DUE TO THUNDERSTORMS MOVING ACROSS THE SAME TRACK.. FLOODING OF STREETS AND UNDERPASSES LIKELY. THE STRONG TUNDERSTORMS WILL PRODUCE HIGH WINDS..DANGEROUS LIGHTNING WITH HEAVY RAIN AND HAIL.
Special weather statement, Mar 12, 12:47 PM CST, 2 hours 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1245 PM CST WED MAR 12 1986 ...THUNDERSTORMS WERE DECREASING ACROSS THE BATON ROUGE METROPOLITAN AREA... AT 1240 PM RADAR SHOWED THUNDERSTORMS BETWEEN BATON ROUGE..PLAQUEMINE AND ST. FRANCISVILLE LOUISIANA AND FROM DONALDSONVILLE TO GREENSBURG LOUISIANA. THE THUNDERSTORMS WERE MOVING RAPIDLY NORTHEAST. STRONG TUNDERSTORMS WILL PRODUCE HIGH WINDS..DANGEROUS LIGHTNING WITH HEAVY R[AIN AND HAIL.
Special weather statement, Mar 12, 1:44 PM CST, 1 hour 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 145 PM CST WED MAR 12 1986 ...A BAND OF THUNDERSTORMS AND SHOWERS HAS DEVELOPED ACROSS AVOYELLES AND ST. LANDRY PARISHES... AT 140 PM RADAR SHOWED THUNDERSTORMS NEAR PORT BARRE AND SIMMESPORT LOUISIANA WITH SHOWERS DEVELOPING INBETWEEN. THE TUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH. STRONG THUNDERSTORMS WILL PRODUCE HIGH WINDS..DANGEROUS LIGHTNING WITH HEAVY RAIN AND HAIL.
Special weather statement, Mar 12, 2:35 PM CST, 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 335 PM CST WED MAR 12 1986 ..LINE OF VERY HEAVY THUNDERSTORMS MOVING OUT OF SOUTHEAST LOUISIANA.. A LINE OF VERY HEAVY THUNDERSTORMS EXTENDED FROM THE NORTH SHORE OF LAKE PONTHCARTRAIN BETWEEN SLIDELL AND COVINGTON NORTHWARD OVER BOGALUSA AND INTO SOUTHEAST MISSISSIPPI JUST WEST OF HATTIESBURG AND LAUREL. ANOTHER HEAVY THUNDERSTORM WAS LOCATED 10 MILES NORTHEAST OF THIBODAUX. THESE THUNDERSTORMS IN SOUTHEAST LOUISIANA WILL PRODUCE STRONG GUSTY WINDS...BRIEF PERIODS OF HEAVY RAIN AND POSSIBLY SMALL HAIL. ELSEWHERE WIDELY SCATTERED HEAVY THUNDERSTORMS INCLUDED IN WIDESPREAD LIGHT RAIN WAS OCCURRING FROM THE COAST NEAR HOUMA AND EXTENDED NORTH BETWEEN BATON ROUGE AND SLIDELL AND INTO SOUTH MISSISSIPPI. WIDELY SCATTERED THUNDERSHOWERS WERE OCCURRING FROM OPELOUSAS LOUISIANA INTO SOUTHWEST MISSISSIPPI. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 45 MILES AN HOUR.
Special weather statement, Mar 12, 2:35 PM CST, 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 435 PM CST WED MAR 12 1986 ..LINE OF VERY HEAVY THUNDERSTORMS MOVING OUT OF SOUTHEAST LOUISIANA.. A LINE OF VERY HEAVY THUNDERSTORMS EXTENDED FROM THE NORTH SHORE OF LAKE PONTHCARTRAIN BETWEEN SLIDELL AND COVINGTON NORTHWARD OVER BOGALUSA AND INTO SOUTHEAST MISSISSIPPI JUST WEST OF HATTIESBURG AND LAUREL. ANOTHER HEAVY THUNDERSTORM WAS LOCATED 10 MILES NORTHEAST OF THIBODAUX. THESE THUNDERSTORMS IN SOUTHEAST LOUISIANA WILL PRODUCE STRONG GUSTY WINDS...BRIEF PERIODS OF HEAVY RAIN AND POSSIBLY SMALL HAIL. ELSEWHERE WIDELY SCATTERED HEAVY THUNDERSTORMS INCLUDED IN WIDESPREAD LIGHT RAIN WAS OCCURRING FROM THE COAST NEAR HOUMA AND EXTENDED NORTH BETWEEN BATON ROUGE AND SLIDELL AND INTO SOUTH MISSISSIPPI. WIDELY SCATTERED THUNDERSHOWERS WERE OCCURRING FROM OPELOUSAS LOUISIANA INTO SOUTHWEST MISSISSIPPI. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 45 MILES AN HOUR.
Local storm report, Mar 12, 2:43 PM CST, 32 minutes before
STORM REPORT NATIONAL WEATHER SERVICE NEW ORLEANS LOUISIANA 240 PM CST WED MAR 12 1986 ABOUR 1230 PM CST A SMALL TORNADO WAS REPORTED TO HAVE TOUCHED DOWN WEST OF FRANKLINTON IN WASHINGTON PARISH. SOME WINDOWS BLOWN OUT OF A SHOP AND A FEW CARS. LIMBS DOWN. IN FRANKLINTON APPARENT STRAIGHT LINE WINDS BLEW DOWN SOME SIGNS AND LIMBS. ALSO A CAR STOPPED AT A RED LIGHT WAS PICKED UP AND TURNED AROUND. NO KNOWN INJURIES AT THIS TIME.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 2:30 AM CST | Severe Thunderstorm Warning | LIX | Catahoula, Concordia | 50 min |
| Mar 12, 6:05 AM CST | Severe Thunderstorm Warning | LIX | Avoyelles, Saint Landry | 60 min |
| Mar 12, 5:30 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa | 60 min |
| Mar 12, 5:30 PM CST | Severe Thunderstorm Warning | LIX | Saint John the Baptist | 60 min |
Nearby
Tornado Warnings in Louisiana, 1986Every tornado warning in 1986Tornadoes 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.