Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 62, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Aug 30, 1990, 9:19 PM CDT for Ascension Parish, Iberville Parish, Louisiana. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Aug 30, 1990, 9:19 PM CDT (02:19 UTC)
- Expired
- Aug 30, 1990, 10:15 PM CDT
- In force
- 56 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Ascension Parish, LA, Iberville 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, 2.3 hours before the alert went out and 137 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
- 32 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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
Special weather statement, Aug 30, 3:44 PM CDT, 5 hours 35 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-302200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 340 PM CDT THU AUG 30 1990 ...SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT FOR ALL OF SOUTHEAST LOUISIANA... SCATTERED THUNDERSTORMS CONTINUED TO DEVELOP ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI FROM BETWEEN HAMMOND AND MCCOMB EAST BETWEEN POPLARVILLE AND LAUREL AND CONTINUED EAST INTO SOUTHWEST ALABAM#A. THE STRONGEST THUNDERSTORMS WERE LOCATED BETWEEN BOGALUSA LOUISIANA AND HATTIESBURG MISSISSIPPI AND EXTENDED EAST TO THE MOBILE AREA. MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR.
Local storm report, Aug 30, 8:18 PM CDT, 1 hour 1 minute before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
815 PM CDT THU AUG 30 1990
SEVERE WEATHER REPORTS FOR AUG 30 OVER SE LOUISIANA
530PM CDT ST. TAMMANY PARISH HALF INCH HAIL REPORTED IN SLIDELL
BY CITY POLICE AND AT NWSFO
525PM CDT ST TAMMANY PARISH TREES DOWNED BY WIND GUSTS IN
MANDEVILLE...POLICE DEPT.
555PM CDT 15 S MANDEVILLE WIND GUSTS TO 62 KTS
...71 MPH ON CAUSEWAY BRIDGE...NWS.
610PM CDT 15 S MANDEVILLE WIND GUSTS TO 50 KTS
63 MPH ON CAUSEWAY BRIDGE...NWS.
630-730PM TANGIPAHOA PARISH REPORTS OF TREES DOWN IN S PORTION
OF PARISH..SHERIFFS OFFICE
645PM CDT ORLEANS PARISH LAKEFRONT ARPT...NEW...WIND GUST 45 KT
52 MPH
658PM CDT ORLEANS PARISH6 N.O. INTERNATIONAL AIRPORT...MSY...WIND
GUST 45 KT...52 MPH.
700-730 PM ST. CHARLES PARISH POWER LINES DOWN IN SEVERAL
COMMUNITIES...EOC.The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:28 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 62 min |
| Aug 30, 8:28 PM CDT | Tornado Warning | LIX | Iberia, Saint Martin | 62 min |
| Aug 30, 9:29 PM CDT | Severe Thunderstorm Warning | LIX | Assumption | 61 min |
| Aug 30, 9:47 PM CDT | Severe Thunderstorm Warning | LIX | St. Mary | 58 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.