Alert archive / Louisiana / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 186, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Sep 24, 2005, 12:10 PM CDT for Ascension Parish, Livingston Parish, Saint James Parish, Louisiana. It was in force for 35 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
- Sep 24, 2005, 12:10 PM CDT (17:10 UTC)
- Expired
- Sep 24, 2005, 12:45 PM CDT
- In force
- 35 min
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
Counties Ascension Parish, LA, Livingston Parish, LA, Saint James 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 |
|---|---|---|---|
| Sep 24, 5:45 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.2 hours before the alert went out and 107 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
- 1218 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 725 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.6
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 Sep 24, 10:07 AM CDT, 2 hours 3 minutes earlier.
Area forecast discussion, Sep 24, 10:07 AM CDT, 2 hours 3 minutes before
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1007 AM CDT SAT SEP 24 2005
.UPDATE...UPDATED FORECAST GRIDS AND ZONES TO ACCOUNT FOR THE
CANCELLATION OF TROPICAL STORM/INLAND TROPICAL STORM WARNINGS.
WILL GO WITH A COASTAL FLOOD WARNING FOR ALL AREAS NEXT TO WATER
TO ACCOUNT FOR STORM SURGE ISSUES. WILL ALSO GO WITH A WIND
ADVISORY FOR THE CWA/PWA AS WINDS WILL REMAIN FAIRLY STRONG
THROUGHOUT THE REMAINING MORNING AND EARLY AFTERNOON HOURS. SMALL
CRAFT REMAIN IN PORT WILL ALSO BE HEADLINED IN THE CWF.
&&
.PREV UPDATE...UPDATED FOR TORNADO WATCH #812 WHICH REPLACED
NUMBERS 810 AND 811. WATCH COVERS ENTIRE CWA EXCEPT FOR OUTER
COASTAL WATERS AND LASTS INTO 500 PM TONIGHT.
.PREV DISCUSSION...ETA AND AVN/GFS INITIALIZED FAIRLY WELL AT
00Z. FIND SIGNIFICANT DIFFERENCES IN THE MODELS AFTER 36 HOURS
WITH ETA TRENDING TOWARD DROPPING THE REMNANTS OF RITA BACK TO THE
SOUTHWEST INTO AN OPEN TROUGH. AVN LIFTS RITA NORTH AND SLOWLY
EAST...THUS THE HIGHER POPS CONTINUING INTO SUNDAY. GRADUAL
IMPROVEMENT IN WEATHER NOTED AFTER TUESDAY ANS A STRONG RIDGE
PUSHES EAST PROVIDING MUCH NEEDED COOLER TEMPERATURES. AVN DROPS A
COLD FRONT NORTH LA AREA EARLY PART OF NEXT WEEK AND ALLOWS IT TO
SINK SOUTH TO THE COAST BY FRIDAY. AT THE SAME TIME A WEAK
TROPICAL WAVE IS HINTED AT COMING INTO THE SOUTHEAST GULF AND
INTERACTING WITH THE OLD FRONT TO PROVIDE SOME OVERRUNNING
PRECIPITATION THURSDAY AND FRIDAY. WILL BACK OFF ON HIGH POPS IN
AVN MOS GUIDANCE FOR NOW AS IM NOT CERTAIN ABOUT THIS
INTERACTION. ALTHO RITA HAS MADE LANDFALL AND WIND RADII IS
SLACKING OFF...WILL MAINTAIN CURRENT WATCHES AND WARNINGS UNTIL
NEXT TPC PACKAGE. CURRENT SUSTAINED WINDS EAST OF MS RIVER ARE
BELOW TROPICAL STORM VALUES WITH GUSTS TO OR APPROACHING GALE
FORCE. EXPECT THESE TO BE LOWERED LATER TODAY. ONSHORE FLOW IS
STILL SUFFICIENT TO JUSTIFY MAINTAINING COASTAL FLOOD WARNING.
TIDE GAUGES IN OCEAN SPRINGS SHOWERS 3.5 TO 4 FEET...IN GRAND ISLE
TIDES ARE 5 FEET AND IN THE MIDDLE OF LAKE PONTCHARTRAIN TIDES
WERE 5 FEET ABOVE NORMAL.
&&
PRELIMINARY TEMPS AND POPS...
MCB 81 76 82 73 / 100 80 70 60
BTR 82 77 85 75 / 100 80 70 69
MSY 86 80 86 78 / 80 50 60 60
GPT 84 79 84 76 / 80 50 60 60
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLOOD WATCH UNTIL 7 AM SUNDAY FOR LAZ034-LAZ035-LAZ036-LAZ037-
LAZ038-LAZ039-LAZ040-LAZ046-LAZ047-LAZ048-LAZ049-LAZ050-
LAZ056-LAZ057-LAZ058-LAZ059-LAZ060-LAZ061-LAZ062-LAZ063-
LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-LAZ070.
TORNADO WATCH UNTIL 5 PM SATURDAY FOR LAZ034-LAZ035-LAZ036-
LAZ037-LAZ038-LAZ039-LAZ040-LAZ046-LAZ047-LAZ048-LAZ049-
LAZ050-LAZ056-LAZ057-LAZ058-LAZ059-LAZ060-LAZ061-LAZ062-
LAZ063-LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-LAZ070.
WIND ADVISORY UNTIL 5 PM SATURDAY FOR LAZ034-LAZ035-LAZ036-
LAZ037-LAZ038-LAZ039-LAZ040-LAZ046-LAZ047-LAZ048-LAZ049-
LAZ050-LAZ056-LAZ057-LAZ058-LAZ059-LAZ060-LAZ061-LAZ062-
LAZ063-LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-LAZ070.
GM...SMALL CRAFT ADVISORY UNTIL 1 PM SUNDAY FOR GMZ530-GMZ550-GMZ555-
GMZ570-GMZ575.
TORNADO WATCH UNTIL 5 PM SATURDAY FOR GMZ530-GMZ550-GMZ555.
MS...FLOOD WATCH UNTIL 7 AM SUNDAY FOR MSZ068-MSZ069-MSZ070-MSZ071-
MSZ077-MSZ080-MSZ081-MSZ082.
TORNADO WATCH UNTIL 5 PM SATURDAY FOR MSZ068-MSZ069-MSZ070-
MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.
WIND ADVISORY UNTIL 5 PM SATURDAY FOR MSZ068-MSZ069-MSZ070-
MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.
GM...SMALL CRAFT ADVISORY UNTIL 1 PM SUNDAY FOR GMZ530-GMZ550-GMZ555-
GMZ570-GMZ575.
TORNADO WATCH UNTIL 5 PM SATURDAY FOR GMZ530-GMZ550-GMZ555.
&&
09/07Hazardous weather outlook, Sep 24, 11:45 AM CDT, 25 minutes before
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 7:02 PM CDT | Tornado Warning | LIX | East Baton Rouge, Livingston | 28 min |
| Sep 23, 8:06 PM CDT | Tornado Warning | LIX | Livingston | 24 min |
| Sep 23, 11:55 PM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Pointe Coupee, Saint James and 2 more | 4 hr |
| Sep 24, 12:55 AM CDT | Tornado Warning | LIX | East Baton Rouge, West Baton Rouge | 20 min |
| Sep 24, 1:34 AM CDT | Flash Flood Warning | LIX | East Baton Rouge | 3 hr |
| Sep 24, 2:29 AM CDT | Flash Flood Warning | LIX | Livingston, Saint Charles, Saint John the Baptist | 3 hr |
| Sep 24, 3:32 AM CDT | Tornado Warning | LIX | Livingston, Saint Helena | 13 min |
| Sep 24, 4:43 AM CDT | Tornado Warning | LIX | Saint Helena, Tangipahoa | 17 min |
| Sep 24, 5:52 AM CDT | Flash Flood Warning | LIX | Saint Helena, Tangipahoa | 3 hr |
| Sep 24, 6:15 AM CDT | Tornado Warning | LIX | Tangipahoa | 15 min |
| Sep 24, 10:25 AM CDT | Severe Thunderstorm Warning | LIX | Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge and 1 more | 65 min |
| Sep 24, 11:28 AM CDT | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Lafourche, Saint James | 47 min |
| Sep 24, 5:53 PM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, West Feliciana | 30 min |
| Sep 24, 11:12 AM CDT | Severe Thunderstorm Warning | LIX | Amite, Wilkinson | 63 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2005Every severe thunderstorm warning in 2005
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.