Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 181, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Aug 12, 2008, 3:43 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana; Pearl River County, Mississippi. It was in force for 47 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 12, 2008, 3:43 PM CDT (20:43 UTC)
- Expired
- Aug 12, 2008, 4:30 PM CDT
- In force
- 47 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Pearl River County, MS
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 12, 2:21 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 54 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
- 3027 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 12, 2:45 PM CDT, 58 minutes earlier.
Area forecast discussion, Aug 12, 2:45 PM CDT, 58 minutes before
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</html>Hazardous weather outlook, Aug 12, 11:26 AM CDT, 4 hours 17 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1126 AM CDT TUE AUG 12 2008 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-131630- LAKE PONTCHARTRAIN AND LAKE MAUREPAS- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA- EAST FELICIANA-ST. HELENA-TANGIPAHOA-WASHINGTON-ST. TAMMANY- IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON- ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE- ST. CHARLES-UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES- UPPER ST. BERNARD-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE-LOWER JEFFERSON-LOWER PLAQUEMINES- LOWER ST. BERNARD-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER- HANCOCK-HARRISON-JACKSON- 1126 AM CDT TUE AUG 12 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE COASTAL WATERS OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...THIS AFTERNOON AND TONIGHT A POTENT UPPER LEVEL DISTURBANCE WILL MOVE BETWEEN INTERSTATES 10 AND 20 TODAY. STRONG LOW LEVEL WINDS WILL PROVIDE ENOUGH SHEAR TO POTENTIALLY PRODUCE SEVERE THUNDERSTORMS DURING THE AFTERNOON AND EARLY EVENING HOURS. THUS...THE STORM PREDICTION CENTER HAS PLACED THE ENTIRE FORECAST AREA UNDER A SLIGHT RISK FOR SEVERE WEATHER. THE MAIN THREATS WITH ANY SEVERE ACTIVITY WOULD BE DAMAGING WINDS IN EXCESS OF 60 MPH AND ISOLATED TORNADOES. IN ADDITION...THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE LOCALIZED HEAVY RAINFALL...WHICH COULD CAUSE MINOR FLOODING ON ROADWAYS AND IN LOW LYING AREAS. A GENERAL 1.5 TO 2 INCHES CAN BE EXPECTED AREAWIDE...WITH ISOLATED AREAS OF 3 TO 4 INCHES. A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR LAKES PONTCHARTRAIN AND MAUREPAS AND ALL GULF COASTAL WATERS THROUGH TONIGHT...WITH WINDS OF 20 KNOTS AND 5 TO 7 FOOT SEAS EXPECTED. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE SMALL CRAFT ADVISORY WILL CONTINUE THROUGH WEDNESDAY MORNING ACROSS THE COASTAL WATERS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS EACH DAY. ORGANIZED HAZARDOUS WEATHER IS NOT ANTICIPATED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON AND EVENING.
In the hours before
Special weather statement, Aug 12, 12:30 PM CDT, 3 hours 13 minutes before
LAZ034>036-048-121815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1230 PM CDT TUE AUG 12 2008 ...THUNDERSTORM WITH STRONG GUSTY WINDS MOVING TOWARD THE FELICIANAS... AT 1228 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH STRONG GUSTY WINDS 7 MILES SOUTHWEST OF NEW ROADS...OR ABOUT 5 MILES NORTH OF LIVONIA...MOVING NORTHEAST AT 41 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... NEW ROADS BY 1240 PM ST. FRANCISVILLE BY 1250 PM WAKEFIELD BY 1255 PM ZACHARY BY 100 PM JACKSON BY 105 PM WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. GUSTY WINDS AND VERY HEAVY RAIN ARE ALL POSSIBLE WITH THIS THUNDERSTORM. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. BE PREPARED TO TAKE QUICK ACTION IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE LOCAL MEDIA OUTLETS FOR FURTHER DETAILS OR UPDATES FROM THE NATIONAL WEATHER SERVICE. 32
Local storm report, Aug 12, 1:44 PM CDT, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
144 PM CDT TUE AUG 12 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0112 PM TSTM WND DMG JACKSON 30.83N 91.21W
08/12/2008 EAST FELICIANA LA LAW ENFORCEMENT
POWER LINES REPORTED DOWN IN JACKSON.
&&
PGRIGSBYLocal storm report, Aug 12, 2:27 PM CDT, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NEW ORLEANS LA
227 PM CDT TUE AUG 12 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0112 PM TSTM WND DMG JACKSON 30.83N 91.21W
08/12/2008 EAST FELICIANA LA LAW ENFORCEMENT
POWER LINES REPORTED DOWN IN JACKSON.
0200 PM TSTM WND DMG CLINTON 30.86N 91.01W
08/12/2008 EAST FELICIANA LA LAW ENFORCEMENT
MULTIPLE REPORTS OF TREES AND POWER LINES DOWN ACROSS THE
PARISH.
0205 PM TSTM WND DMG OSYKA 31.01N 90.47W
08/12/2008 PIKE MS LAW ENFORCEMENT
TREES REPORTED DOWN IN SOUTHERN PIKE COUNTY IN THE OSYKA
AND MAGNOLIA AREA.
&&
PGRIGSBYLocal storm report, Aug 12, 2:56 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NEW ORLEANS LA
256 PM CDT TUE AUG 12 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0112 PM TSTM WND DMG JACKSON 30.83N 91.21W
08/12/2008 EAST FELICIANA LA LAW ENFORCEMENT
POWER LINES REPORTED DOWN IN JACKSON.
0200 PM TSTM WND DMG CLINTON 30.86N 91.01W
08/12/2008 EAST FELICIANA LA LAW ENFORCEMENT
MULTIPLE REPORTS OF TREES AND POWER LINES DOWN ACROSS THE
PARISH.
0205 PM TSTM WND DMG OSYKA 31.01N 90.47W
08/12/2008 PIKE MS LAW ENFORCEMENT
TREES REPORTED DOWN IN SOUTHERN PIKE COUNTY IN THE OSYKA
AND MAGNOLIA AREA.
0240 PM TSTM WND DMG MCCOMB 31.25N 90.47W
08/12/2008 PIKE MS LAW ENFORCEMENT
MULTIPLE REPORTS OF TREES DOWN IN PIKE COUNTY. TREES WERE
REPORTED DOWN IN THE CITY OF MCCOMB AND AT THE
INTERSECTION OF FERNWOOD RD AND PLEASANT GROVE ROAD TO
THE EAST OF MCCOMB. REPORTS CAME IN FROM 220-240 PM.
&&
PGRIGSBYThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 10:11 PM CDT | Small Craft Advisory | LIX | 42 hr | |
| Aug 12, 1:04 PM CDT | Tornado Warning | LIX | East Feliciana, West Feliciana | 26 min |
| Aug 12, 1:32 PM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, Saint Helena, Tangipahoa | 43 min |
| Aug 12, 3:45 PM CDT | Special Marine Warning | LIX | 60 min | |
| Aug 12, 3:56 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 49 min |
| Aug 12, 4:38 PM CDT | Special Marine Warning | LIX | 67 min | |
| Aug 12, 5:43 PM CDT | Special Marine Warning | LIX | 92 min | |
| Aug 12, 2:20 PM CDT | Severe Thunderstorm Warning | LIX | Pike, Walthall | 25 min |
| Aug 12, 4:08 PM CDT | Severe Thunderstorm Warning | LIX | Pearl River | 37 min |
| Aug 12, 4:45 PM CDT | Severe Thunderstorm Warning | LIX | Hancock, Harrison, Pearl River | 30 min |
| Aug 12, 5:14 PM CDT | Severe Thunderstorm Warning | LIX | Hancock, Harrison, Jackson | 61 min |
| Aug 12, 6:15 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 30 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2008Severe Thunderstorm Warnings in Mississippi, 2008Every severe thunderstorm warning in 2008
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.