Alert archive / Louisiana / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 20, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 20, 2006, 4:56 PM CST for Washington Parish, Louisiana; Pearl River County, Mississippi. It was in force for 34 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
- Mar 20, 2006, 4:56 PM CST (22:56 UTC)
- Expired
- Mar 20, 2006, 5:30 PM CST
- In force
- 34 min
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
Counties 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 |
|---|---|---|---|
| Mar 20, 3:09 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.9 hours before the alert went out and 63 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
- 301 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 601 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 515 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
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 Mar 20, 4:33 PM CST, 23 minutes earlier.
Area forecast discussion, Mar 20, 4:33 PM CST, 23 minutes before
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</html>Hazardous weather outlook, Mar 20, 11:10 AM CST, 5 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1110 AM CST MON MAR 20 2006 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-210100- 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- 1110 AM CST MON MAR 20 2006 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT ...THUNDERSTORMS... THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS CONTAINING A FEW STRONG TORNADOES AND DAMAGING WINDS ACROSS PORTIONS OF SOUTHERN MISSISSIPPI INCLUDING WILKINSON...AMITE...PIKE...AND WALTHALL COUNTIES TODAY. LARGE HAIL AND LOCALLY HEAVY RAINFALL ARE ALSO POSSIBLE. ELSEWHERE...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS EAST CENTRAL AND SOUTHEAST LOUISIANA AND COASTAL MISSISSIPPI TODAY INTO THIS EVENING. ISOLATED TORNADOES...DAMAGING WINDS...AND LARGE HAIL ARE POSSIBLE. A STRONG STORM SYSTEM NOW ACROSS THE SOUTHERN PLAINS WILL MOVE EAST TODAY ACROSS THE LOWER MISSISSIPPI VALLEY AND CENTRAL GULF COAST STATES. A WARM FRONT IS EXPECTED TO MOVE NORTH ACROSS CENTRAL LOUISIANA AND MISSISSIPPI TODAY AND WILL BE A FOCUS FOR THUNDERSTORM DEVELOPMENT. THE AIRMASS ALONG AND TO THE SOUTH OF THE WARM FRONT WILL BECOME UNSTABLE THIS AFTERNOON AS GULF MOISTURE CONTINUES TO MOVE NORTH. STRONG WIND PROFILES ARE FAVORABLE FOR ROTATING THUNDERSTORMS WHICH WILL BE CAPABLE OF PRODUCING A FEW STRONG TORNADOES...ESPECIALLY ACROSS SOUTHWEST AND SOUTH CENTRAL MISSISSIPPI. ...MARINE... A SMALL CRAFT ADVISORY IS UP FOR SOUTHERLY WINDS OF 20 TO 25 KNOTS THROUGH MIDNIGHT AHEAD OF THE APPROACHING COLD FRONT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER OPERATIONS WILL LIKELY BE NEEDED TODAY...ESPECIALLY IN THE NORTHWEST HALF OF THE AREA. 22
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 2:30 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 45 min |
| Mar 20, 2:39 PM CST | Tornado Warning | LIX | East Feliciana, Pointe Coupee, West Feliciana | 36 min |
| Mar 20, 3:05 PM CST | Tornado Warning | LIX | East Feliciana, West Feliciana | 25 min |
| Mar 20, 3:16 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 29 min |
| Mar 20, 3:52 PM CST | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 38 min |
| Mar 20, 4:14 PM CST | Severe Thunderstorm Warning | LIX | Washington | 31 min |
| Mar 20, 3:30 PM CST | Severe Thunderstorm Warning | LIX | Amite, Pike | 45 min |
| Mar 20, 3:37 PM CST | Severe Thunderstorm Warning | LIX | Amite, Wilkinson | 23 min |
| Mar 20, 4:03 PM CST | Tornado Warning | LIX | Pike, Walthall | 27 min |
| Mar 20, 4:28 PM CST | Tornado Warning | LIX | Walthall | 32 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2006Severe Thunderstorm Warnings in Mississippi, 2006Every severe thunderstorm warning in 2006
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.