Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 49, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Jul 11, 1990, 3:33 PM CDT for East Baton Rouge Parish, Louisiana. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1990, 3:33 PM CDT (20:33 UTC)
- Expired
- Jul 11, 1990, 4:00 PM CDT
- In force
- 27 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County East Baton Rouge 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 12:00Z, 8.6 hours before the alert went out and 138 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
- 1815 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 787 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBTR 112033 SVRBTR LAC033-112100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BATON ROUGE LA 333 PM CDT WED JUL 11 1990 THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL LOUISIANA ...EAST BATON ROUGE PARISH RADAR INDICATED A SEVERE THUNDERSTORM OVER BATON ROUGE MOVING NORTH AT 10 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR 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
Special weather statement, Jul 11, 12:53 PM CDT, 2 hours 40 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-111900- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 1240 PM CDT WED JUL 11 1990 AT 1230 PM...A FEW THUNDERSTORMS WITH HEAVY RAIN WERE OCCURRING OVER THE GREATER NEW ORLEANS AREA. THESE THUNDERSTORMS ARE MOVING VERY SLOWLY TO THE NORTH THEREFORE...MORTORIST CAN EXPECT POOR DRIVING CONDITIONS AS BRIEF FLOODING OF STREETS AND LOW LYING AREAS MAY OCCUR ALONG WITH DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. BOATERS ON AREA LAKES SHOULD ALSO EXERCISE CAUTION AS THESE STORMS ARE VERY LIKELY TO CAUSE HIGHER WAVES. A COUPLE OF OTHER THUNDRSTORMS WITH HEAVY RAIN WERE BETWEEN GRAND ISLE AND HOUMA. MOSTLY SHOWERS WERE OCCURRING THE BATON ROUGE AREA. A CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN CONTINUED ACROSS SOUTHEAST MISSISSIPPI FROM 15 MILES NORTH OF GULFPORT EAST INTO SOUTHWEST ALABAMA TO 25 MILES NORTHWEST OF MOBILE THE THUNDERSTORM ACTIVITY WAS MOVING SLOWLY TO THE NORTH.
Special weather statement, Jul 11, 1:36 PM CDT, 1 hour 57 minutes before
LAZ006-008-009-112130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 135 PM CDT WED JUL 11 1990 ...THUNDERSTORMS WITH HEAVY RAIN MOVING ACROSS PARTS OF EAST CENTRAL LOUISIANA... RADAR SHOWED THUNDERSTORMS WITH HEAVY RAIN FROM DONALDSONVILLE AND WHITE CASTLE NORTH ACROSS BATON ROUGE AND PORT ALLEN TO MORGANZA AND CLINTON AND FROM GROSSE TETE TO OPELOUSAS. MOVEMENT WAS NORTH AT 10 MPH. THUNDERSTORMS WILL PRODUCE STRONG GUS2TY WINDS...VERY HEAVY RAIN WITH TEMPORARY FLOODING OF STREETS AND LOW LYING AREAS...DANGEROUS LIGHTNING WITH HAIL POSSIBLE FOR THE NEXT FEW HOURS.
Special weather statement, Jul 11, 1:52 PM CDT, 1 hour 41 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-112000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 140 PM CDT WED JUL 11 1990 AT 130 PM...A FEW THUNDERSTORMS WITH HEAVY RAIN CONTINUED BETWEEN THE GREATER NEW ORLEANS AREA AND THIBODAUX. THESE THUNDERSTORMS ARE MOVING SLOW THE NORTHWEST THEREFORE...MORTORIST CAN EXPECT POOR DRIVING CONDITIONS AS BRIEF FLOODING OF STREETS AND LOW LYING AREAS MAY OCCUR ALONG WITH DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. BOATERS ON AREA LAKES SHOULD ALSO EXERCISE CAUTION AS THESE STORMS ARE VERY LIKELY TO CAUSE HIGHER WAVES. SCATTERED SHOWERS AND THUNDRSTORMS...A FEW WITH HEAVY RAIN...ALSO CONTINUED GENERALLY BETWEEN BATON ROUGE AND LAFAYETTE. A CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN CONTINUED OVER SOUTHEAST MISSISSIPPI 20 MILES SOUTHEAST OF HATTIESBURG. AND ANOTHER CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN CONTINUED OVER SOUTHWEST ALABAMA BETWEEN 30 MILES AND 80 MILERS NORTH OF MOBILE. MOVEMENT WAS TO THE NORTH AND NORTHWEST AT 5 TO 10 MILES AN HOUR.
Special weather statement, Jul 11, 2:07 PM CDT, 1 hour 26 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-112100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 140 PM CDT WED JUL 11 1990 AT 130 PM...A FEW THUNDERSTORMS WITH HEAVY RAIN CONTINUED BETWEEN THE GREATER NEW ORLEANS AREA AND THIBODAUX. THESE THUNDERSTORMS ARE MOVING SLOWLY TO THE NORTHWEST. MOTORIST CAN EXPECT POOR DRIVING CONDITIONS AS BRIEF FLOODING OF STREETS AND LOW LYING AREAS MAY OCCUR ALONG WITH DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. BOATERS ON AREA LAKES SHOULD ALSO EXERCISE CAUTION AS THESE STORMS ARE VERY LIKELY TO CAUSE HIGHER WAVES. SCATTERED SHOWERS AND THUNDRSTORMS...A FEW WITH HEAVY RAIN...ALSO CONTINUED GENERALLY BETWEEN BATON ROUGE AND LAFAYETTE. A CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN CONTINUED OVER SOUTHEAST MISSISSIPPI 20 MILES SOUTHEAST OF HATTIESBURG. AND ANOTHER CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN CONTINUED OVER SOUTHWEST ALABAMA BETWEEN 30 MILES AND 80 MILES NsORTH OF MOBILE. MOVEMENT WAS TO THE NORTH AND NORTHWEST AT 5 TO 10 MILES AN HOUR.
Special weather statement, Jul 11, 2:50 PM CDT, 43 minutes before
LAZ006-008-009-112200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 250 PM CDT WED JUL 11 1990 ...STRONG THUNDERSTORMS WITH HEAVY RAIN MOVING ACROSS PARTS OF EAST CENTRAL LOUISIANA... RADAR SHOWED STRONG THUNDERSTORMS WITH HEAVY RAIN FROM WHITE CASTLE... DONALDSONVILLE AND LAKE MAUREPAS NORTH ACROSS GROSSE TETE AND DENHAM SPRINGS TO ANGOLA AND CLINTON AND FROM PORT BARRE AND MORGANZA TO MARKSVILLE AND SIMMESPORT. MOVEMENT WAS NORTH AT 10 MPH. THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS...VERY HEAVY RAIN WITH TEMPORARY FLOODING OF STREETS AND LOW LYING AREAS...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL FOR THE NEXT FEW HOURS.
Special weather statement, Jul 11, 2:53 PM CDT, 40 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-112100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 250 PM CDT WED JUL 11 1990 AT 230 PM...A FEW THUNDERSTORMS WITH HEAVY RAIN CONTINUED BETWEEN THE GREATER NEW ORLEANS AREA AND AVERY ISLAND. THESE THUNDERSTORMS ARE MOVING SLOWLY NORTHWEST. MOTORIST CAN EXPECT POOR DRIVING CONDITIONS AS BRIEF FLOODING OF STREETS AND LOW LYING AREAS MAY OCCUR...AS WELL AS DANGEROUS LIGHTNING AND STRONG GUSTY WIND. BOATERS ON AREA LAKES SHOULD ALSO EXERCISE CAUTION AS THESE THUNDERSTORM WINDS WILL LIKELY CAUSE ROUGH SEAS. SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH HEAVY RAIN...ALSO WERE OCCURRING SOUTHEAST OF LAFAYETTE...BETWEEN SLIDELL AND COVINGTON...AND ALONG THE NORTHERN HALF OF THE MISSISSIPPI RIVER DELTA. A CLUSTER OF STRONG THUNDERSTORMS WITH HEAVY RAIN CONTINUED OVER SOUTHWEST ALABAMA. ELSEWHERE...SCATTERED SHOWERS AND THUNDERSTORMS SPREAD ACROSS SOUTH LOUISIANA AND THE COASTAL WATERS EASTWARD ACROSS SOUTHEAST MISSISSIPPI AND INTO SOUTHWEST ALABAMA. MOVEMENT WAS TOWARDS THE NORTHWEST AT 5 TO 10 MILES AN HOUR.
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.