Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 150, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 30, 1999, 5:07 PM CDT for Iberville Parish, Louisiana. It was in force for 33 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, 5:07 PM CDT (22:07 UTC)
- Expired
- May 30, 1999, 5:40 PM CDT
- In force
- 33 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Iberville Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.1 hours before the alert went out and 158 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, May 30, 12:33 PM CDT, 4 hours 34 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, 4 hours 34 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, 12:51 PM CDT | Tornado Warning | LIX | Iberville, West Baton Rouge | 34 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, 11:55 AM CDT | Tornado Warning | LIX | Pearl River | 30 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1999Every severe thunderstorm warning 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.