Alert archive / Louisiana / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 18, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Feb 23, 2004, 1:43 PM CST for Plaquemines Parish, Louisiana. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2004, 1:43 PM CST (19:43 UTC)
- Expired
- Feb 23, 2004, 2:45 PM CST
- In force
- 62 min
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
County Plaquemines Parish, LA
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 23, 10:00 AM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 125 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
- 618 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 476 m²/s²
- 0-3 km storm-relative helicity
- 736 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
411
WUUS54 KLIX 231943
SVRNEW
LAC075-232045-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
141 PM CST MON FEB 23 2004
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
PLAQUEMINES PARISH IN SOUTHEAST LOUISIANA
* UNTIL 245 PM CST
* AT 137 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF SEVERE THUNDERSTORMS FROM BOOTHVILLE TO 30 MILES
SOUTHWEST OF BURAS MOVING EAST SOUTHEAST AROUND 25 MILES AN HOUR.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED
WARNING.
THIS IS A DANGEROUS STORM...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.
LAT...LON 2944 8942 2912 8969 2904 8997 2883 8939
2898 8914 2925 8890
$$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 Feb 23, 1:15 PM CST, 28 minutes earlier.
Area forecast discussion, Feb 23, 1:15 PM CST, 28 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE NEW ORLEANS LA 115 PM CST MON FEB 23 2004 LAZ040-056>070-MSZ080>082-232000- ASSUMPTION-HANCOCK-HARRISON-JACKSON-LOWER JEFFERSON-LOWER LAFOURCHE- LOWER PLAQUEMINES-LOWER ST BERNARD-LOWER TERREBONNE-ORLEANS- ST CHARLES-ST JAMES-ST JOHN THE BAPTIST-ST TAMMANY-UPPER JEFFERSON- UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD-UPPER TERREBONNE- 1254 PM CST MON FEB 23 2004 ...TORNADO WATCH NUMBER 11 IS DISCONTINUED FOR THE FOLLOWING PARISHES... IN SOUTHEAST LOUISIANA... ST TAMMANY...ST JOHN THE BAPTIST...ST JAMES...ASSUMPTION...ST CHARLES...ORLEANS...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES PARISHES. IN SOUTH MISSISSIPPI... HANCOCK...HARRISON...AND JACKSON COUNTIES. THE TORNADO WATCH CONTINUES IN EFFECT UNTIL 300 PM CST FOR THE FOLLOWING LOCATIONS. IN SOUTHEAST LOUISIANA... ST BERNARD PARISH...SOUTHERN PLAQUEMINES...SOUTHERN JEFFERSON... SOUTHERN LAFOURCHE...AND TERREBONNE PARISHES.
Hazardous weather outlook, Feb 23, 10:00 AM CST, 3 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NEW ORLEANS LA 1000 AM CST MON FEB 23 2004 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-241100- AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-HANCOCK- HARRISON-IBERVILLE-JACKSON-LIVINGSTON-LOWER JEFFERSON- LOWER LAFOURCHE-LOWER PLAQUEMINES-LOWER ST BERNARD-LOWER TERREBONNE- ORLEANS-PEARL RIVER-PIKE-POINTE COUPEE-ST CHARLES-ST HELENA-ST JAMES- ST JOHN THE BAPTIST-ST TAMMANY-TANGIPAHOA-UPPER JEFFERSON- UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD-UPPER TERREBONNE- WALTHALL-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA-WILKINSON- 1000 AM CST MON FEB 23 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST LOUISIANA AND EXTREME SOUTH...SOUTHWEST AND COASTAL MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT A WARM FRONT...EXTENDING FROM JUST SOUTH OF LAKE CHARLES TO LAKE PONTCHARTRAIN...IS EXPECTED TO DRIFT SLIGHTLY NORTH AND BECOMIE STATIONARY TONIGHT. SOUTHWEST FLOW ALOFT WILL BRING DISTURBANCES ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI AND INTERACT WITH MOISTURE TO CREATE WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS. A FEW THUNDERSTORMS MAY PRODUCE SMALL HAIL AND WINDS GUSTING TO 30 MPH. .RIVER FLOODING...RIVER FLOODING IS STILL OCCURRING ON THE LOWER PEARL RIVER AND ON THE ATCHAFALAYA RIVER AT MORGAN CITY. REFER TO THE LATEST RIVER FLOOD STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE FOR FURTHER INFORMATION. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... UPPER LEVEL LOW AND SURFACE LOW WILL MOVE EAST ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI TUESDAY AFTERNOON AND EVENING...PRODUCING SHOWERS AND THUNDERSTORMS. A FEW THUNDERSTORMS MAY BECOME SEVERE TONIGHT AND TUESDAY. HAIL AND DAMAGING WINDS WOULD BE THE MAIN THREAT. HAZARDOUS WEATHER IS NOT EXPECTED WEDNESDAY THROUGH SUNDAY. .RIVER FLOODING...RIVER FLOODING WILL CONTINUE ON THE LOWER PEARL AND ATCHAFALAYA RIVERS. ADDITION RAINFALL MAY CAUSE FLOODING OF ADDITIONAL RIVERS AS WELL. REFER TO THE LATEST RIVER FLOOD STATEMENTS AND WARNINGS ISSUED BY THE NATIONAL WEATHER SERVICE FOR FURTHER INFORMATION. .MARINE...SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED TO DEVELOP BY TUESDAY NIGHT WITH WINDS OVER THE GULF COASTAL WATERS INCREASING FROM THE NORTH TO 20 TO 25 KNOTS. WINDS AND SEAS OVER THE COASTAL WATERS AND TIDAL LAKES ARE EXPECTED TO SUBSIDE THURSDAY. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT REQUESTED AT THIS TIME.
In the hours before
Local storm report, Feb 23, 12:50 PM CST, 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1250 PM CST MON FEB 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1201 PM MARINE TSTM WIND 20 S GULFPORT 30.10N 89.07W
02/23/2004 43 MPH XXX XX BUOY
BUOY 42007 MEASURED 36029G37KT.
1135 AM FLOOD DESTREHAN 29.96N 90.37W
02/23/2004 ST. CHARLES LA EMERGENCY MNGR
MINOR STREET FLOODING PARISHWIDE.
1021 AM MARINE TSTM WIND 1 N LAKEFRONT KNEW ARPT 30.04N 90.04W
02/23/2004 46 MPH ORLEANS LA OFFICIAL NWS OBS
ASOS MEASURED 35040 KT.
1015 AM HAIL 2 SW DESTREHAN 29.94N 90.39W
02/23/2004 0.25 INCH ST. CHARLES LA EMERGENCY MNGR
1010 AM MARINE TSTM WIND 12 N METAIRIE 30.17N 90.18W
02/23/2004 48 MPH XXX XX OFFICIAL NWS OBS
MIDLAKE MDLL1 MEASURED 34423G42KT.
0850 AM HAIL BATON ROUGE KBTR ARPT 30.53N 91.15W
02/23/2004 0.25 INCH EAST BATON ROUGE LA OFFICIAL NWS OBS
&&
RICKSSpecial weather statement, Feb 23, 1:15 PM CST, 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 115 PM CST MON FEB 23 2004 LAZ040-056>070-MSZ080>082-232000- ASSUMPTION-HANCOCK-HARRISON-JACKSON-LOWER JEFFERSON-LOWER LAFOURCHE- LOWER PLAQUEMINES-LOWER ST BERNARD-LOWER TERREBONNE-ORLEANS- ST CHARLES-ST JAMES-ST JOHN THE BAPTIST-ST TAMMANY-UPPER JEFFERSON- UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD-UPPER TERREBONNE- 1254 PM CST MON FEB 23 2004 ...TORNADO WATCH NUMBER 11 IS DISCONTINUED FOR THE FOLLOWING PARISHES... IN SOUTHEAST LOUISIANA... ST TAMMANY...ST JOHN THE BAPTIST...ST JAMES...ASSUMPTION...ST CHARLES...ORLEANS...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES PARISHES. IN SOUTH MISSISSIPPI... HANCOCK...HARRISON...AND JACKSON COUNTIES. THE TORNADO WATCH CONTINUES IN EFFECT UNTIL 300 PM CST FOR THE FOLLOWING LOCATIONS. IN SOUTHEAST LOUISIANA... ST BERNARD PARISH...SOUTHERN PLAQUEMINES...SOUTHERN JEFFERSON... SOUTHERN LAFOURCHE...AND TERREBONNE PARISHES. AT 410 AM CST...A LINE OF STRONG THUNDERSTORMS...EXTENDING FROM GULFPORT AND BILOXI...SOUTH INTO THE MISSISSIPPI SOUND...WAS MOVING NORTHEAST AT 40 MPH. THESE STORMS WILL PRODUCE STRONG WINDS GUSTS OF 35 TO 45 MPH NEAR THE COAST FROM BILOXI TO OCEAN SPRINGS THROUGH 430 AM. IN ADDITION...OCCASIONAL LIGHTNING...AND HEAVY DOWNPOURS OF RAIN WILL MOVE ACROSS HARRISON AND JACKSON COUNTIES THROUGH 5 AM.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 9:10 AM CST | Special Marine Warning | LIX | 50 min | |
| Feb 23, 9:24 AM CST | Tornado Warning | LIX | Lafourche, Terrebonne | 36 min |
| Feb 23, 10:09 AM CST | Tornado Warning | LIX | Saint Charles | 36 min |
| Feb 23, 10:36 AM CST | Special Marine Warning | LIX | 114 min | |
| Feb 23, 10:44 AM CST | Tornado Warning | LIX | Plaquemines | 31 min |
| Feb 23, 12:22 PM CST | Special Marine Warning | LIX | 113 min | |
| Feb 23, 1:06 PM CST | Special Marine Warning | LIX | 114 min | |
| Feb 23, 3:19 PM CST | Severe Thunderstorm Warning | LIX | Iberville, Pointe Coupee, West Baton Rouge | 41 min |
| Feb 23, 3:24 PM CST | Special Marine Warning | LIX | 2 hr | |
| Feb 23, 3:24 PM CST | Special Marine Warning | LIX | 2 hr | |
| Feb 23, 4:00 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, West Baton Rouge | 30 min |
| Feb 23, 5:38 PM CST | Special Marine Warning | LIX | 82 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2004Every 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.