Alert archive / Louisiana / Tornado Warnings in 1999
Tornado Warning 35, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at May 30, 1999, 12:51 PM CDT for Iberville Parish, West Baton Rouge Parish, Louisiana. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 30, 1999, 12:51 PM CDT (17:51 UTC)
- Expired
- May 30, 1999, 1:25 PM CDT
- In force
- 34 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.9 hours before the alert went out and 157 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
- 744 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 865 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 74 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 KNEW 301751 RRA TORNEW LAC047-121-301825- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1251 PM CDT SUN MAY 30 1999 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A... * TORNADO WARNING FOR - WESTERN WEST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA - EASTERN IBERVILLE PARISH IN SOUTHEASTERN LOUISIANA * UNTIL 125 PM CDT * AT 1248 PM CDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING TORNADO 6 MILES NORTHEAST OF PLAQUEMINE MOVING NORTH AT 15 MPH. * THE TORNADO IS CURRENTLY EXPECTED TO REMAIN OVER RURAL AREAS BUT APPROACH THE SOUTHERN PORTIONS OF METRO BATON ROUGE AREA BY 120 PM. IF YOU ARE IN THESE AREAS...S:EEK SHELTER IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
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, May 30, 11:00 AM CDT, 1 hour 51 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-310000- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1100 AM CDT SUN MAY 30 1999 ...LOCALLY HEAVY RAINFALL IS EXPECTED THIS AFTERNOON AND TONIGHT... A STRONG UPPER LEVEL DISTURBANCE IS MOVING ACROSS LOUISIANA TODAY. AN ABUNDANT SUPPLY OF TROPICAL MOISTURE ACROSS THE AREA WILL MAKE TORRENTIAL RAINFALL A PRIMARY THREAT TODAY AND TONIGHT. THUNDERSTORMS WILL BE SCATTERED TO NUMEROUS THROUGHOUT THE DAY AND WILL BE MOVING GENERALLY NORTHEAST BETWEEN 10 AND 15 MPH. DEADLY LIGHTNING CAN BE EXPECTED WITH ALL THE STORMS TODAY AS WELL. SOME OF THE MORE STRONGER STORMS MAY ALSO BE CAPABLE OF PRODUCING WIND GUSTS OF 40 TO 50 MPH IN DOWNBURSTS AND SOME SMALL HAIL...PARTICULARLY THOSE THAT DEVELOP LATER THIS AFTERNOON. WATERSPOUTS WILL ALSO BE POSSIBLE OVER LARGE BODIES OF WATER. LOCAL RAINFALL FORECASTING METHODS SUGGEST RAINFALL AMOUNTS GENERALLY BETWEEN 2 AND 3 INCHES LIKELY WITH LOCALLY HIGHER AMOUNTS AROUND 5 INCHES POSSIBLE FROM SOME OF THE MORE PRONOUNCED STORMS. LOCALIZED STREET AND LOW-LYING AREA FLOODING CAN BE EXPECTED DURING PERIODS OF HEAVY RAINFALL. RESIDENTS...LOCAL LAW ENFORCEMENT AND EMERGENCY PREPAREDNESS PERSONNEL SHOULD MONITOR THE WEATHER SITUATION TODAY AND TONIGHT FOR POTENTIAL HEAVY RAIN AND FLOOD PROBLEMS THAT MAY ARISE. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS THROUGHOUT THE DAY. FOR MORE WEATHER INFORMATION...VISIT OUR HOMEPAGE AT HTTP://WWW.SRH.NOAA.GOV/LIX (ALL LOWER CASE) 24
Special weather statement, May 30, 11:00 AM CDT, 1 hour 51 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-310000- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1100 AM CDT SUN MAY 30 1999 ...LOCALLY HEAVY RAINFALL IS EXPECTED THIS AFTERNOON AND TONIGHT... A STRONG UPPER LEVEL DISTURBANCE IS MOVING ACROSS LOUISIANA TODAY. AN ABUNDANT SUPPLY OF TROPICAL MOISTURE ACROSS THE AREA WILL MAKE TORRENTIAL RAINFALL A PRIMARY THREAT TODAY AND TONIGHT. THUNDERSTORMS WILL BE SCATTERED TO NUMEROUS THROUGHOUT THE DAY AND WILL BE MOVING GENERALLY NORTHEAST BETWEEN 10 AND 15 MPH. DEADLY LIGHTNING CAN BE EXPECTED WITH ALL THE STORMS TODAY AS WELL. SOME OF THE MORE STRONGER STORMS MAY ALSO BE CAPABLE OF PRODUCING WIND GUSTS OF 40 TO 50 MPH IN DOWNBURSTS AND SOME SMALL HAIL...PARTICULARLY THOSE THAT DEVELOP LATER THIS AFTERNOON. WATERSPOUTS WILL ALSO BE POSSIBLE OVER LARGE BODIES OF WATER. LOCAL RAINFALL FORECASTING METHODS SUGGEST RAINFALL AMOUNTS GENERALLY BETWEEN 2 AND 3 INCHES LIKELY WITH LOCALLY HIGHER AMOUNTS AROUND 5 INCHES POSSIBLE FROM SOME OF THE MORE PRONOUNCED STORMS. LOCALIZED STREET AND LOW-LYING AREA FLOODING CAN BE EXPECTED DURING PERIODS OF HEAVY RAINFALL. RESIDENTS...LOCAL LAW ENFORCEMENT AND EMERGENCY PREPAREDNESS PERSONNEL SHOULD MONITOR THE WEATHER SITUATION TODAY AND TONIGHT FOR POTENTIAL HEAVY RAIN AND FLOOD PROBLEMS THAT MAY ARISE. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS THROUGHOUT THE DAY. FOR MORE WEATHER INFORMATION...VISIT OUR HOMEPAGE AT HTTP://WWW.SRH.NOAA.GOV/LIX (ALL LOWER CASE) 24
Local storm report, May 30, 12:33 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE NEW ORLEANS LOUISIANA
1233 PM CDT THU MAY 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....PARISH LOCATION....
1209 PM SILVER RUN MS TORNADO
05/30/99 PEARL RIVER SIGHTED BY FIRE DEPT AND
RELAYED BY PEARL RIVER
S.O. ABOUT 8 MILES WEST OF
SILVER RUN EAST OF HIGHWAY
53.
1055 AM NORTH SHORE LA NON QUALIFIED EVENT
05/30/99 ST TAMMANY 2 WATERSPOUTS NEAR HIGHWAY
11 BRIDGE SOUTH OF EDEN
ISLES. ONE SPOUT CROSSED
THE SPAN AS REPORTED BY
CAUSEWAY POLICE AND TV MET.Local storm report, May 30, 12:33 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE NEW ORLEANS LOUISIANA
1233 PM CDT THU MAY 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....PARISH LOCATION....
1209 PM SILVER RUN MS TORNADO
05/30/99 PEARL RIVER SIGHTED BY FIRE DEPT AND
RELAYED BY PEARL RIVER
S.O. ABOUT 8 MILES WEST OF
SILVER RUN EAST OF HIGHWAY
53.
1055 AM NORTH SHORE LA NON QUALIFIED EVENT
05/30/99 ST TAMMANY 2 WATERSPOUTS NEAR HIGHWAY
11 BRIDGE SOUTH OF EDEN
ISLES. ONE SPOUT CROSSED
THE SPAN AS REPORTED BY
CAUSEWAY POLICE AND TV MET.The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:57 AM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 33 min |
| May 30, 12:06 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 44 min |
| May 30, 3:31 PM CDT | Tornado Warning | LIX | Terrebonne | 29 min |
| May 30, 3:40 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee | 35 min |
| May 30, 5:07 PM CDT | Severe Thunderstorm Warning | LIX | Iberville | 33 min |
Nearby
Tornado Warnings in Louisiana, 1999Every tornado warning in 1999Tornadoes in 1999
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.