Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 200, NWS New Orleans, LA

August 24, 2000Livingston Parish, Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 24, 2000, 4:21 PM CDT for Livingston Parish, Saint Helena Parish, Louisiana. It was in force for 39 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: Aug 24, 2000, 4:21 PM CDT (21:21 UTC)
Expired: Aug 24, 2000, 5:00 PM CDT
In force: 39 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Livingston Parish, LA, Saint Helena Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.4 hours before the alert went out and 106 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1533 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KLIX 242125
SVRNEW
LAC063-091-242200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
421 PM CDT THU AUG 24 2000

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LIVINGSTON PARISH IN SOUTHEAST LOUISIANA
  ST. HELENA PARISH IN SOUTHEAST LOUISIANA

* UNTIL 500 PM CDT

* AT 420 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A CLUSTER OF SEVERE THUNDERSTORMS 7 MILES NORTHWEST OF              
  MONTPELIER....MOVING SOUTHWEST AT 10 MPH.

THIS IS A DANGEROUS STORM WITH DAMAGING WINDS...STAY INDOORS AWAY
FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW? ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN NEW ORLEANS.

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.

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 24, 2:30 PM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, Aug 24, 2:30 PM CDT, 1 hour 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
230 PM CDT THU AUG 24 2000

PRECIPITATION COVERAGE HAS BEEN MORE LIMITED ACROSS THE FORECAST
AREA THIS AFTERNOON AND THIS TREND SHOULD CONTINUE THROUGH THE NEXT
COUPLE OF DAYS. MID/UPPER LEVEL RIDGE THAT HAS DOMINATED THE
SOUTHERN CONUS RECENTLY HAS SHIFTED WESTWARD AND WAS CENTERED OVER
TX AND OK THIS MORNING. MODELS SIMILAR IN CONTINUING TO RETROGRADE
THIS FEATURE ACROSS THE CENTRAL AND SOUTHERN PLAINS AND ROCKIES
DURING THE PERIOD WHILE AMPLIFYING AN UPPER TROUGH OVER THE EASTERN
U.S.  MODELS CONTINUE TO ADVERTISE DRIER AIR WORKING ITS WAY ACROSS
THE AREA INTO FRIDAY WITH PRECIPITABLE WATERS VALUES FALLING TO
AROUND 1.50 INCHES AND MEAN LAYERED RH VALUES TO AROUND 50 PERCENT
BEFORE REBOUNDING SOMEWHAT ON SATURDAY IN ADVANCE OF A WEAK SURFACE
TROUGH/FRONT MOVING INTO THE SE U.S.. ALTHOUGH ATMOSPHERE FORECAST
TO BE DRIER ACROSS THE AREA ON FRIDAY...HAVE OPTED TO LEAVE WIDELY
SCATTERED CONVECTION IN THE FORECAST AS SHORTWAVE CURRENTLY MOVING
THROUGH THE MID MS VALLEY MOVES AROUND THE RIDGE AND ACROSS THE
FORECAST AREA FRIDAY AND FRIDAY NIGHT. LOW LEVEL FLOW FORECAST TO
BECOME MORE SOUTHERLY FRIDAY AFTERNOON WHICH SHOULD HELP SET UP A
WEAK SEA BREEZE. REMNANTS OF DEBBY NOW GENERALLY FORECAST TO MOVE W
ACROSS THE GULF...THEREFORE PLAN TO HAVE ONLY ISOLATED TO WIDELY
SCATTERED DIURNAL CONVECTION EACH DAY DURING THE EXTENDED PERIOD OF
THE FORECAST.

MCB 71/95/71/94 0212     BTR 73/93/73/93 0212
MSY 75/93/75/93 0212     GPT 73/93/73/93 0212

.NEW...NONE
LA...NONE.
MS...NONE.

11

In the hours before

Special weather statement, Aug 24, 10:25 AM CDT, 5 hours 56 minutes before

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-241800-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1025 AM CDT THU AUG 24 2000

A MOIST AND UNSTABLE AIRMASS WILL REMAIN OVER SOUTHEAST LOUISIANA
AND SOUTH MISSISSIPPI TODAY. AS A RESULT...SCATTERED THUNDERSTORMS
ARE EXPECTED ACROSS THE AREA THIS AFTERNOON AND EVENING. ALTHOUGH
FREQUENT LIGHTNING AND LOCALLY HEAVY DOWNPOURS WILL BE POSSIBLE
WITH SOME OF THE THUNDERSTORMS...THE STORMS ARE EXPECTED TO REMAIN
BELOW SEVERE CRITERIA.

FOR MORE WEATHER INFORMATION VISIT OUR WEB-SITE AT
WWW.SRH.NOAA.GOV/LIX (ALL LOWER CASE).

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 24, 12:20 PM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint Charles	40 min
Aug 24, 4:01 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	29 min
Aug 24, 5:00 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana	30 min
Aug 24, 5:58 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee	22 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2000 Every severe thunderstorm warning in 2000

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.