Alert archive / Louisiana / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 30, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 24, 2010, 6:21 AM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 54 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
- Apr 24, 2010, 6:21 AM CDT (11:21 UTC)
- Expired
- Apr 24, 2010, 7:15 AM CDT
- In force
- 54 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington 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 |
|---|---|---|---|
| Apr 24, 6:15 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 11.4 hours before the alert went out and 59 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
- 1334 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 477 m²/s²
- 0-3 km storm-relative helicity
- 593 m²/s²
- Significant tornado parameter
- 4.9
- Supercell composite
- 19.7
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 Apr 24, 6:20 AM CDT, 1 minute earlier.
Area forecast discussion, Apr 24, 6:20 AM CDT, 1 minute before
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</html>Hazardous weather outlook, Apr 24, 5:05 AM CDT, 1 hour 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 505 AM CDT SAT APR 24 2010 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-251015- 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- 505 AM CDT SAT APR 24 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT SEVERE WEATHER... STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TODAY UNTIL A COLD FRONT MOVES THROUGH THE AREA THIS AFTERNOON. THERE IS A MODERATE RISK OF SEVERE WEATHER ACROSS SOUTHWEST MISSISSIPPI AND THE NORTHERN FLORIDA PARISHES...AND A SLIGHT RISK OF SEVERE WEATHER ACROSS THE REMAINDER OF THE FORECAST AREA. THE MAIN CONCERNS WILL BE ISOLATED TORNADOES...AS WELL AS LARGE HAIL AND DAMAGING WIND. MARINE HAZARDS... SMALL CRAFT ADVISORIES WILL REMAIN IN EFFECT ACROSS THE COASTAL WATERS THROUGH THIS EVENING. WINDS OF 25 TO 30 KNOTS WILL CONTINUE WITH GALE FORCE GUSTS POSSIBLE. SEAS OF UP TO 9 FEET CAN BE EXPECTED...ESPECIALLY BEYOND 15 NAUTICAL MILES FROM SHORE. LOCALLY HIGHER SEAS CAN BE EXPECTED IN AND AROUND ANY THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY RIVER FLOODING... MINOR FLOODING WILL CONTINUE ALONG THE ATCHAFALAYA RIVER NEAR MORGAN CITY. PLEASE REFER TO THE LATEST RIVER FLOOD STATEMENTS AND FORECASTS FOR ADDITIONAL DETAILS. HAZARDOUS WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS MAY BE NEEDED THIS MORNING. PLEASE MONITOR THE LATEST OUTLOOKS AND STATEMENTS REGARDING SEVERE WEATHER POTENTIAL.
In the hours before
Special weather statement, Apr 24, 2:12 AM CDT, 4 hours 9 minutes before
MSZ081-082-240745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 212 AM CDT SAT APR 24 2010 ...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING JACKSON COUNTY... HARRISON COUNTY... AT 210 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 8 MILES NORTHWEST OF BILOXI...OR ABOUT 6 MILES EAST OF LYMAN...MOVING NORTHEAST AT 40 MPH. THE STRONG THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF THE INDICATED COUNTIES. THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND PEA TO DIME SIZE HAIL. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.
Special weather statement, Apr 24, 3:41 AM CDT, 2 hours 40 minutes before
MSZ081-082-240915- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 341 AM CDT SAT APR 24 2010 ...STRONG THUNDERSTORM MOVING EAST AFFECTING JACKSON COUNTY... HARRISON COUNTY... AT 337 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 14 MILES NORTH OF DIAMONDHEAD...OR ABOUT 10 MILES SOUTHWEST OF SAUCIER...MOVING EAST NORTHEAST AT 60 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...SAUCIER THE PRIMARY THREAT FROM THIS STORM IS PEA TO DIME SIZE HAIL. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.
Special weather statement, Apr 24, 4:18 AM CDT, 2 hours 3 minutes before
MSZ082-241015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 418 AM CDT SAT APR 24 2010 ...STRONG THUNDERSTORMS MOVING NORTHEAST AFFECTING JACKSON COUNTY... AT 406 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 17 MILES NORTHEAST OF ST. MARTIN...OR ABOUT 11 MILES WEST OF WADE...MOVING NORTHEAST AT 30 MPH. ANOTHER STORM WAS DETECTED EAST OF WADE. THIS STORM IS EXPECTED TO EXIT JACKSON COUNTY BY 430 AM. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...WADE THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND PEA TO DIME SIZE HAIL. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.
Special weather statement, Apr 24, 5:07 AM CDT, 1 hour 14 minutes before
LAZ037-038-046-048>050-241100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 507 AM CDT SAT APR 24 2010 ...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING IBERVILLE PARISH... LIVINGSTON PARISH...TANGIPAHOA PARISH...EAST BATON ROUGE PARISH...ST. HELENA PARISH...ASCENSION PARISH... AT 500 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 7 MILES SOUTH OF PLAQUEMINE...OR ABOUT 5 MILES NORTHWEST OF WHITE CASTLE...MOVING NORTHEAST AT 45 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...CARVILLE... GARDERE...OAK HILLS PLACE...PRAIRIEVILLE...WESTMINSTER...DENHAM SPRINGS...WALKER...WATSON...LIVINGSTON...ROSELAND...MONTPELIER... GREENSBURG AND AMITE. THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING...PEA TO DIME SIZE HAIL...AND WIND GUSTS TO NEAR 40 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS 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.
Special weather statement, Apr 24, 5:25 AM CDT, 56 minutes before
LAZ036>038-048-050-241130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 525 AM CDT SAT APR 24 2010 ...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING EAST FELICIANA PARISH...LIVINGSTON PARISH...TANGIPAHOA PARISH...EAST BATON ROUGE PARISH...ST. HELENA PARISH... AT 524 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM NEAR DENHAM SPRINGS...OR ABOUT 2 MILES SOUTH OF WATSON...MOVING NORTHEAST AT 50 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...PRIDE... MONTPELIER...DARLINGTON...GREENSBURG...ROSELAND...EASLEYVILLE... TANGIPAHOA AND KENTWOOD THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING...PEA TO DIME SIZE HAIL...AND WIND GUSTS TO NEAR 40 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS 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.
Local storm report, Apr 24, 6:17 AM CDT, 4 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 |
|---|---|---|---|---|
| Apr 24, 5:41 AM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston, Tangipahoa | 64 min |
| Apr 24, 5:54 AM CDT | Tornado Warning | LIX | Tangipahoa, Washington | 23 min |
| Apr 24, 7:49 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Baton Rouge, West Feliciana | 26 min |
| Apr 24, 8:08 AM CDT | Tornado Warning | LIX | East Feliciana, Saint Helena | 37 min |
| Apr 24, 8:30 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Livingston, Saint Helena, Tangipahoa | 42 min |
| Apr 24, 8:48 AM CDT | Special Marine Warning | LIX | 42 min | |
| Apr 24, 9:10 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 41 min |
| Apr 24, 9:19 AM CDT | Special Marine Warning | LIX | 56 min | |
| Apr 24, 9:26 AM CDT | Severe Thunderstorm Warning | LIX | Washington | 64 min |
| Apr 24, 11:40 AM CDT | Special Marine Warning | LIX | 65 min | |
| Apr 24, 12:33 PM CDT | Special Marine Warning | LIX | 31 min | |
| Apr 24, 12:40 PM CDT | Special Marine Warning | LIX | 35 min | |
| Apr 24, 2:41 PM CDT | Special Marine Warning | LIX | 64 min | |
| Apr 24, 3:41 PM CDT | Small Craft Advisory | LIX | 5 hr | |
| Apr 24, 3:52 PM CDT | Coastal Flood Warning | LIX | 8 hr | |
| Apr 24, 4:27 PM CDT | Special Marine Warning | LIX | 93 min | |
| Apr 24, 4:54 PM CDT | Special Marine Warning | LIX | 51 min | |
| Apr 24, 2:16 AM CDT | Severe Thunderstorm Warning | LIX | Jackson | 29 min |
| Apr 24, 5:45 AM CDT | Severe Thunderstorm Warning | LIX | Walthall | 30 min |
| Apr 24, 10:03 AM CDT | Tornado Warning | LIX | Pearl River | 27 min |
| Apr 24, 4:27 PM CDT | Coastal Flood Advisory | LIX | 3 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2010Every severe thunderstorm warning in 2010
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.