Alert archive / Mississippi / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 145, NWS New Orleans, LA

November 29, 2010Wilkinson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Nov 29, 2010, 11:43 PM CST for Wilkinson 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
Nov 29, 2010, 11:43 PM CST (05:43 UTC)
Expired
Nov 30, 2010, 12:30 AM CST
In force
47 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

County Wilkinson County, MS

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Nov 29, 8:49 PM CSTTornado WatchSPC7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 5.7 hours before the alert went out and 174 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2010-11-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 946 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2010-11-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 406 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
946 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
406 m²/s²
0-3 km storm-relative helicity
492 m²/s²
Significant tornado parameter
0.0
Supercell composite
13.9

Open this sounding in Storm Lab

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 Nov 29, 3:43 PM CST, 8 hours earlier.

Area forecast discussion, Nov 29, 3:43 PM CST, 8 hours before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Nov 29, 9:08 PM CST, 2 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
908 PM CST MON NOV 29 2010

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>040-
046>050-056>070-MSZ068>071-077-080>082-010315-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND-
LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND-
COASTAL WATERS FROM THE PORT FOURCHON TO LOWER ATCHAFALAYA RIVER
OUT 20 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON OUT 20 NM-
COASTAL WATERS FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER OUT 20 NM-
COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM-
COASTAL WATERS FROM THE PORT FOURCHON TO LOWER ATCHAFALAYA RIVER
FROM 20 TO 60 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON FROM 20 TO 60 NM-
COASTAL WATERS FROM STAKE ISLAND LA TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER FROM 20 TO 60 NM-
COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA 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-
908 PM CST MON NOV 29 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS
OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.

.DAY ONE...TONIGHT
SEVERE WEATHER...
TORNADO WATCH NUMBER 755 HAS BEEN ISSUED FOR PORTIONS OF SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI THAT ARE GENERALLY ALONG AND
NORTH OF A LINE FROM PIERRE PART TO KILLIAN TO SLIDELL...EXCLUDING
THE MISSISSIPPI GULF COAST. SCATTERED SHOWERS AND THUNDERSTORMS
WILL CONTINUE TO DEVELOP WELL AHEAD OF AN APPROACHING COLD FRONT
AND A FEW OF THESE STORMS MAY BECOME STRONG OR SEVERE. THE MAIN
THREAT FROM THESE THUNDERSTORMS WILL BE DAMAGING WIND AND ISOLATED
TORNADOES.

AS THE COLD FRONT MOVES THROUGH THE REGION LATER TONIGHT...A
POTENT SQUALL LINE WILL ACCOMPANY IT. A FEW OF THE THUNDERSTORMS
ALONG THE SQUALL LINE MAY BECOME SEVERE. THE MAIN THREATS FROM ANY
SEVERE THUNDERSTORMS EMBEDDED WITHIN THE SQUALL LINE WILL BE
DAMAGING WINDS AND ISOLATED TORNADOES. ADDITIONAL SEVERE
THUNDERSTORM WATCHES OR TORNADO WATCHES MAY BE ISSUED LATER
TONIGHT.

MARINE...
SMALL CRAFT ADVISORIES ARE IN EFFECT FOR ALL COASTAL WATERS DUE TO
STRONG WINDS AND ROUGH SEAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
SEVERE WEATHER...
THE THREAT OF SEVERE WEATHER WILL CONTINUE UNTIL A COLD FRONT
PASSES THROUGH THE REGION EARLY TUESDAY MORNING.

MARINE...
NORTHWEST WINDS WILL INCREASE RAPIDLY FOLLOWING THE COLD FRONTAL
PASSAGE. SUSTAINED WINDS OF 30 KNOTS OR HIGHER ARE EXPECTED OVER
THE OPEN WATERS OF THE GULF OF MEXICO AND A GALE WATCH REMAINS IN
EFFECT FOR THOSE AREAS THROUGH TUESDAY EVENING. WITHIN THE NEAR
SHORE SOUNDS AND LAKE BORGNE...WINDS WILL BE A BIT WEAKER...AND A
SMALL CRAFT ADVISORY WILL REMAIN IN EFFECT.

.SPOTTER INFORMATION STATEMENT...
EMERGENCY MANAGEMENT...STORM SPOTTERS AND OTHER PUBLIC SAFETY
OFFICIALS SHOULD RELAY ANY REPORTS OF SEVERE WEATHER TO THE
NATIONAL WEATHER SERVICE OFFICE IN SLIDELL. WE CAN BE REACHED BY
PHONE AT 9 8 5 6 4 9 0 3 5 7 OR 5 0 4 5 2 2 7 3 3 0. TO SPEAK WITH
A FORECASTER...USE EXTENSION 4.

95/DM

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 30, 12:29 AM CSTTornado WarningLIXPointe Coupee, West Feliciana46 min
Nov 30, 1:33 AM CSTSevere Thunderstorm WarningLIXEast Feliciana, Pointe Coupee, West Feliciana42 min
Nov 30, 2:15 AM CSTSevere Thunderstorm WarningLIXEast Feliciana, West Feliciana45 min
Nov 30, 2:32 AM CSTTornado WarningLIXEast Feliciana28 min
Nov 30, 5:36 AM CSTTornado WarningLIXSaint Tammany, Tangipahoa, Washington24 min
Nov 30, 5:41 AM CSTTornado WarningLIXWashington34 min
Nov 30, 6:06 AM CSTTornado WarningLIXSaint Tammany, Tangipahoa, Washington24 min
Nov 30, 6:12 AM CSTSpecial Marine WarningLIX91 min
Nov 30, 6:19 AM CSTTornado WarningLIXWashington26 min
Nov 30, 6:30 AM CSTTornado WarningLIXSaint Tammany30 min
Nov 30, 6:39 AM CSTSevere Thunderstorm WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles66 min
Nov 30, 6:42 AM CSTSevere Thunderstorm WarningLIXWashington29 min
Nov 30, 7:00 AM CSTSpecial Marine WarningLIX2 hr
Nov 30, 7:14 AM CSTSpecial Marine WarningLIX101 min
Nov 30, 8:12 AM CSTSpecial Marine WarningLIX33 min
Nov 30, 8:14 AM CSTSpecial Marine WarningLIX2 hr
Nov 30, 8:30 AM CSTSpecial Marine WarningLIX30 min
Nov 30, 8:51 AM CSTSpecial Marine WarningLIX54 min
Nov 30, 8:54 AM CSTSpecial Marine WarningLIX2 hr
Nov 30, 9:03 AM CSTSevere Thunderstorm WarningLIXPlaquemines57 min
Nov 30, 10:05 AM CSTSpecial Marine WarningLIX115 min
Nov 30, 10:10 AM CSTSpecial Marine WarningLIX103 min
Nov 30, 11:25 AM CSTGale WarningLIX4 hr
Nov 30, 11:25 AM CSTSmall Craft AdvisoryLIX23 hr
Nov 30, 11:51 AM CSTSpecial Marine WarningLIX114 min
Nov 30, 12:01 AM CSTTornado WarningLIXWilkinson44 min
Nov 30, 3:04 AM CSTTornado WarningLIXAmite, Pike41 min
Nov 30, 3:38 AM CSTTornado WarningLIXPike, Walthall17 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.