Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 4, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Feb 15, 1990, 8:30 PM CST for Livingston Parish, Louisiana. It was in force for 20 min.
The area
The counties it named.
The facts
- Issued
- Feb 15, 1990, 8:30 PM CST (02:30 UTC)
- Expired
- Feb 15, 1990, 8:50 PM CST
- In force
- 20 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Livingston 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 2.5 hours before the alert went out and 101 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
- NaN m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBTR 160231 SVRBTR LAC063-160315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BATON ROUGE LA 830 PM CST THU FEB 15 1990 THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL LOUISIANA ...LIVINGSTON PARISH AT 830 PM CST RADARS SHOWED A SEVERE THUNDERSTORM NEAR PORT VINCENT MOVING TO THE NORTHEAST AT 40 MPH. THIS SEVERE THUNDERSTORM WILL MOVE ACROSS THE WALKER-SATSUMA-LIVINGSTON AREA WITHIN THE NEXT 15 MINUTES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPH6ONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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 15, 5:32 PM CST, 2 hours 58 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-160100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 532 PM CST THU FEB 15 1990 ...A TORNADO WATCH IS IN EFFECT UNTIL 100 PM FOR PART OF SOUTHEAST LOUISIANA INCLUDING WASHINGTON...TANGIPAHOA...ST TAMMANY AND UPPER ST MARTIN PARISHES... OVER SOUTHEAST LOUISIANA THE ONLY PRECIPITATION DETECTED WAS WIDELY SCATTERED LIGHT RAIN SHOWERS NORTH OF HAMMOND AND FROM NEAR LAKE MAUREPAS SOUTHWEST TO JUST WEST OF THIBODAUX. WIDELY SCATTERED RAIN SHOWERS AND THUNDERSTORMS CONTINUED OVER MOST OF SOUTH MISSISSIPPI EXCEPT FOR THE EXTREME SOUTHWEST CORNER AND THE COASTAL SECTIONS. THE THUNDERSTORMS WERE MOVING NORTHEAST =AT 35 MILES AN HOUR.
Special weather statement, Feb 15, 6:05 PM CST, 2 hours 25 minutes before
LAZ009-008-006-160100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 605 PM CST THU FEB 15 1990 ...TORNADO WATCH UNTIL 10 PM CST TONIGHT FOR EAST CENTRAL LOUISIANA EXCEPT ASCENSION PARISH... AT 6 PM CST RADAR SHOWED THUNDERSTORMS HAD MOVED FROM EAST CENTRAL LOUISIANA INTO MISSISSIPPI. THUNDERSTORMS CONTINUED IN NORTH LOUISIANA...WITH SHOWERS DEVELOPING BETWEEN LAFAYETTE AND BATON ROUGE. ADDITIONAL THUNDERSTORM DEVELOPcMENT IS EXPECTED TONIGHT ACROSS EAST CENTRAL LOUISIANA. PERSONS SHOULD REMAIN ALERT AND LISTEN FOR LATEST STATEMENTS OR WARNINGS.
Special weather statement, Feb 15, 6:39 PM CST, 1 hour 51 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-160200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 630 PM CST THU FEB 15 1990 ...A TORNADO WATCH IS IN EFFECT UNTIL 100 PM FOR PART OF SOUTHEAST LOUISIANA INCLUDING WASHINGTON...TANGIPAHOA...ST TAMMANY AND UPPER ST MARTIN PARISHES... OVER SOUTHEAST LOUISIANA WIDELY SCATTERED RAIN SHOWERS WERE OCCURRING FROM LAKE MAAUREPAS NORTHEAST BETWEEN MCCOMB MISSISSIPPI AND BOGALUSA LOUISIANA LOUISIANA AND ON NORTHEAST OVER MISSISSIPPI BETWEEN MCCOMB AND HATTIESBURG TO BETWEEN JACKSON AND MERIDIAN. ISOLATED LIGHT RAIN SHOWERS WERE OCCURRING ALONG THE COASTAL SECTIONS AND IN THE COASTAL WATERS NEAR VERMILION BAY. THE SHOWERS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.
Special weather statement, Feb 15, 7:04 PM CST, 1 hour 26 minutes before
LAZ009-008-006-160200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 705 PM CST THU FEB 15 1990 ...TORNADO WATCH UNTIL 10 PM CST TONIGHT FOR EAST CENTRAL LOUISIANA EXCEPT ASCENSION PARISH... AT 7 PM CST RADAR SHOWED THUNDERSTORMS CONTINUED OVER NORTHEAST LOUISIANA NEAR MONROE...WITH SHOWERS DEVELOPING FROM BATON ROUGE TO LAFAYETTE SOUTH INTO THE GULF. THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH. PERSONS SHOULD REMAIN ALERT AS ADDITIONAL THUNDERSTORM DEVELOPMENT WILL OCCUR THROUGH TONIGHT.
Special weather statement, Feb 15, 7:33 PM CST, 57 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-160300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 733 PM CST THU FEB 15 1990 ...A TORNADO WATCH IS IN EFFECT UNTIL 100 PM FOR PART OF SOUTHEAST LOUISIANA INCLUDING WASHINGTON...TANGIPAHOA...ST TAMMANY AND UPPER ST MARTIN PARISHES... SCATTERED RAIN SHOWERS AND THUNDERSTORMS EXTENDED FROM JUST WEST OF ATCHAFALAYA BAY NORTHEAST BETWEEN NEW IBERIA AND MORGAN CITY AND ON NORTHEAST OVER BATON ROUGE. THESE THUNDERSTORMS WERE INCREASING IN INTENSITY. WIDELY SCATTERED RAIN SHOWERS AND THUNDERSTORMS EXTENDED FROM BETWEEN LAKE PONTCHARTRAIN AND BATON ROUGE INTO SOUTH CENTRAL MISSISSIPPI WEST OF HATTIESBURG AND WEST OF LAUREL. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 45 MILES AN HOUR.
Special weather statement, Feb 15, 7:50 PM CST, 40 minutes before
LAZ009-008-006-160245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 750 PM CST THU FEB 15 1990 ...TORNADO WATCH CONTINUES UNTIL 10 PM CST FOR EAST CENTRAL LOUISIANA EXCEPT ASCENSION PARISH... AT 745 PM CST RADAR SHOWED THUNDERSTORMS WITH STRONG WIND GUSTS...VERY HEAVY RAIN AND HAIL NEAR PLAQUEMINE MOVING NORTHEAST AT 40 MPH. THESE THUNDERSTORMS WILL MOVE OVER THE BATON ROUGE METROPOLITAN AREA SHORTLY. ADDITIONAL THUNDERSTORM DEVELOPMENT IS LIKELY TONIGHT. PERSONS SHOULD REMAIN ALERT AND LISTEN FOR LATEST STATEMENTS OR WARNINGS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 8:42 PM CST | Severe Thunderstorm Warning | LIX | Tangipahoa | 48 min |
| Feb 15, 9:01 PM CST | Tornado Warning | LIX | Tangipahoa | 29 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; the sounding from the Mesonet's radiosonde archive.