Alert archive / Louisiana / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 215, NWS New Orleans, LA

November 24, 2004Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Nov 24, 2004, 7:01 AM CST for Plaquemines Parish, Louisiana. It was in force for 29 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: Nov 24, 2004, 7:01 AM CST (13:01 UTC)
Expired: Nov 24, 2004, 7:30 AM CST
In force: 29 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

County Plaquemines Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 24, 5:55 AM CST	Tornado Watch	SPC	2 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.0 hours before the alert went out and 79 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -184 m²/s²
0-3 km storm-relative helicity: -60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

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 Nov 24, 3:50 AM CST, 3 hours 11 minutes earlier.

Area forecast discussion, Nov 24, 3:50 AM CST, 3 hours 11 minutes before

AREA FORECAST DISCUSSION...CORRECTION...
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
350 AM CST WED NOV 24 2004

.DISCUSSION...SIGNIFICANT SEVERE WEATHER EVENT IN PROGRESS EARLY
THIS MORNING ACROSS THE FORECAST AREA WITH A FAST MOVING SQUALL LINE
MOVING THROUGH AND SEVERAL SUPERCELLS IN ADVANCE OF THE LINE...
THEREFORE WILL KEEP THE DISCUSSION SHORT. SEVERE WEATHER WILL REMAIN
A THREAT THROUGH THE EARLY MORNING AS UPPER LOW/TROUGH LIFTS
NORTHEAST ACROSS THE LOWER MISSISSIPPI VALLEY AND ASSOCIATED STRONG
SURFACE COLD FRONT PUSHES THROUGH. STRONG DIFFLUENCE ALOFT NOTED ON
WATER VAPOR IMAGERY ACROSS AREA AND 06Z SIL SOUNDING INDICATED
STRONG SPEED AND DIRECTIONAL SHEAR WITH LARGE HELICITY VALUES.
MOST OF THE CONVECTION WILL EXIT THE AREA DURING THE MORNING
HOURS...HOWEVER WILL KEEP CHANCE OF SHOWERS AND THUNDERSTORMS IN FAR
EASTERN ZONES INTO THE AFTERNOON. OTHERWISE...FEW CHANGES MADE TO
GRIDS AND FORECAST BEYOND TODAY WITH COOLER AND DRY WEATHER ON TAP
FOR THANKSGIVING AND FRIDAY WITH THE NEXT CHANCE FOR RAIN STILL ON
TRACK FOR THE WEEKEND AS THE NEXT UPPER TROUGH SWINGS THROUGH. MORE
RAIN POSSIBLE EARLY NEXT WORK WEEK AS WEAK DISTURBANCES TRAVERSE THE
AREA IN SOUTHWEST FLOW ALOFT AHEAD OF ANOTHER UPPER LOW/TROUGH OVER
SOUTHWEST CONUS.

&&

PRELIM POINT TEMP/POPS...
MCB 70 40 57 35 / 60 00 00 00
BTR 70 45 58 39 / 50 00 00 00
MSY 73 49 59 45 / 80 00 00 00
GPT 74 44 59 38 / 80 00 00 00

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
MS...NONE.
SE LA AND MS COASTAL WATERS...SMALL CRAFT ADVISORY PQL TO
ATCHAFALAYA RIVER OUT 60 NM EXCLUDING LAKES PONTCHARTRAIN AND
MAUREPAS.

&&

CORRECTED SMALL CRAFT ADVISORY AREA

11

Hazardous weather outlook, Nov 24, 6:50 AM CST, 11 minutes before

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In the hours before

Local storm report, Nov 24, 2:00 AM CST, 5 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
200 AM CST WED NOV 24 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

1225 AM     TORNADO         LACOMBE                  30.31N 89.93W
11/24/2004                  ST. TAMMANY         LA   PUBLIC

            TORNADO SPOTTED.

1240 AM     TORNADO         SLIDELL                  30.28N 89.78W
11/24/2004                  ST. TAMMANY         LA   LAW ENFORCEMENT

            *** 4 INJ *** SLIDELL PD REPORTING 80-90 HOMES DAMAGED
            WITH A FEW HOMES LIFTED FROM THEIR FOUNDATION IN BEL AIR
            SUBDIVISION WITH INJURIES.

1240 AM     TORNADO         SLIDELL                  30.28N 89.78W
11/24/2004                  ST. TAMMANY         LA   LAW ENFORCEMENT

            NUMEROUS PROPERTY DAMAGE REPORTS ALONG AIRPORT RD.

1240 AM     TORNADO         SLIDELL                  30.28N 89.78W
11/24/2004                  ST. TAMMANY         LA   LAW ENFORCEMENT

            DAMAGE REPORTED AT CENTENNIAL PARK.

1240 AM     TSTM WND GST    SLIDELL                  30.28N 89.78W
11/24/2004                  ST. TAMMANY         LA   LAW ENFORCEMENT

            70 MPH WIND GUST AT NWS SLIDELL.

&&

17

Special weather statement, Nov 24, 4:22 AM CST, 2 hours 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
422 AM CST WED NOV 24 2004

LAZ034>037-047-048-MSZ068>070-241100-
AMITE-EAST BATON ROUGE-EAST FELICIANA-PIKE-POINTE COUPEE-ST HELENA-
WEST BATON ROUGE-WEST FELICIANA-WILKINSON-
422 AM CST WED NOV 24 2004

TORNADO WATCH NUMBER 894 HAS BEEN CANCELLED FOR THE FOLLOWING
LOCATIONS.

IN LOUISIANA...THE PARISHES OF POINTE COUPEE...EAST FELICIANA...
WEST FELICIANA...EAST BATON ROUGE...WEST BATON ROUGE...AND ST.
HELENA PARISHES ARE NO LONGER IN A TORNADO WATCH.

IN MISSISSIPPI...THE COUNTIES OF WILKINSON...AMITE AND PIKE ARE NO
LONGER IN A TORNADO WATCH.

THE THREAT OF SEVERE WEATHER HAS ENDED IN THESE LOCATIONS.

32

Special weather statement, Nov 24, 6:11 AM CST, 50 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 23, 11:39 PM CST	Special Marine Warning	LIX		36 min
Nov 24, 12:12 AM CST	Special Marine Warning	LIX		18 min
Nov 24, 12:16 AM CST	Tornado Warning	LIX	Saint Tammany	29 min
Nov 24, 12:30 AM CST	Special Marine Warning	LIX		15 min
Nov 24, 12:46 AM CST	Tornado Warning	LIX	Saint Tammany	44 min
Nov 24, 1:48 AM CST	Tornado Warning	LIX	Tangipahoa, Washington	27 min
Nov 24, 2:01 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	59 min
Nov 24, 2:04 AM CST	Tornado Warning	LIX	Saint Tammany, Tangipahoa	26 min
Nov 24, 2:10 AM CST	Tornado Warning	LIX	Saint James, Saint John the Baptist	35 min
Nov 24, 2:19 AM CST	Special Marine Warning	LIX		26 min
Nov 24, 2:22 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Iberville, West Baton Rouge	68 min
Nov 24, 2:26 AM CST	Tornado Warning	LIX	Washington	34 min
Nov 24, 2:35 AM CST	Tornado Warning	LIX	Saint Tammany, Washington	40 min
Nov 24, 2:48 AM CST	Special Marine Warning	LIX		27 min
Nov 24, 2:48 AM CST	Tornado Warning	LIX	Livingston	27 min
Nov 24, 2:52 AM CST	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa	53 min
Nov 24, 2:53 AM CST	Tornado Warning	LIX	Saint John the Baptist, Saint Tammany, Tangipahoa	37 min
Nov 24, 3:17 AM CST	Severe Thunderstorm Warning	LIX	Livingston	58 min
Nov 24, 3:23 AM CST	Severe Thunderstorm Warning	LIX	Ascension, Assumption	52 min
Nov 24, 3:24 AM CST	Tornado Warning	LIX	Saint Charles, Saint John the Baptist	36 min
Nov 24, 3:33 AM CST	Tornado Warning	LIX	Saint Tammany	27 min
Nov 24, 3:38 AM CST	Tornado Warning	LIX	Washington	37 min
Nov 24, 3:40 AM CST	Tornado Warning	LIX	Ascension	35 min
Nov 24, 3:41 AM CST	Special Marine Warning	LIX		34 min
Nov 24, 3:58 AM CST	Severe Thunderstorm Warning	LIX	Lafourche, Saint James, Saint John the Baptist, Terrebonne	62 min
Nov 24, 4:00 AM CST	Special Marine Warning	LIX		2 hr
Nov 24, 4:02 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	43 min
Nov 24, 4:06 AM CST	Tornado Warning	LIX	Jefferson, Saint Charles	54 min
Nov 24, 4:13 AM CST	Severe Thunderstorm Warning	LIX	Washington	32 min
Nov 24, 4:17 AM CST	Tornado Warning	LIX	Saint Tammany	58 min
Nov 24, 4:26 AM CST	Tornado Warning	LIX	Lafourche	64 min
Nov 24, 4:27 AM CST	Tornado Warning	LIX	Jefferson, Orleans, Saint Bernard	33 min
Nov 24, 4:32 AM CST	Special Marine Warning	LIX		118 min
Nov 24, 4:55 AM CST	Tornado Warning	LIX	Orleans, Saint Tammany	65 min
Nov 24, 5:00 AM CST	Tornado Warning	LIX	Jefferson	60 min
Nov 24, 5:04 AM CST	Tornado Warning	LIX	Plaquemines	56 min
Nov 24, 5:11 AM CST	Severe Thunderstorm Warning	LIX	Saint Bernard	64 min
Nov 24, 5:15 AM CST	Special Marine Warning	LIX		2 hr
Nov 24, 5:29 AM CST	Special Marine Warning	LIX		2 hr
Nov 24, 5:34 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche	26 min
Nov 24, 6:03 AM CST	Severe Thunderstorm Warning	LIX	Plaquemines	57 min
Nov 24, 7:15 AM CST	Special Marine Warning	LIX		2 hr
Nov 24, 7:15 AM CST	Special Marine Warning	LIX		2 hr
Nov 24, 9:00 AM CST	Special Marine Warning	LIX		60 min
Nov 24, 1:40 AM CST	Tornado Warning	LIX	Pearl River	20 min
Nov 24, 2:00 AM CST	Tornado Warning	LIX	Walthall	15 min
Nov 24, 2:32 AM CST	Severe Thunderstorm Warning	LIX	Amite	58 min
Nov 24, 3:53 AM CST	Severe Thunderstorm Warning	LIX	Hancock	37 min
Nov 24, 4:19 AM CST	Tornado Warning	LIX	Hancock, Harrison	26 min
Nov 24, 4:44 AM CST	Severe Thunderstorm Warning	LIX	Pearl River	61 min
Nov 24, 4:44 AM CST	Tornado Warning	LIX	Harrison	31 min
Nov 24, 4:47 AM CST	Severe Thunderstorm Warning	LIX	Hancock	58 min
Nov 24, 5:10 AM CST	Tornado Warning	LIX	Hancock, Harrison	50 min
Nov 24, 5:55 AM CST	Severe Thunderstorm Warning	LIX	Harrison, Jackson	50 min
Nov 24, 6:41 AM CST	Severe Thunderstorm Warning	LIX	Jackson	49 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2004 Every severe thunderstorm warning in 2004

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.