Alert archive / Louisiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 19, NWS New Orleans, LA

March 26, 2009Tangipahoa Parish, Louisiana; Pike County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 26, 2009, 1:40 PM CDT for Tangipahoa Parish, Louisiana; Pike County, Mississippi. It was in force for 23 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 26, 2009, 1:40 PM CDT (18:40 UTC)
Expired: Mar 26, 2009, 2:03 PM CDT
In force: 23 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Tangipahoa Parish, LA, Pike County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.7 hours before the alert went out and 99 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 371 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.1

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 Mar 26, 6:38 AM CDT, 7 hours 2 minutes earlier.

Area forecast discussion, Mar 26, 6:38 AM CDT, 7 hours 2 minutes before

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Hazardous weather outlook, Mar 26, 9:16 AM CDT, 4 hours 24 minutes before

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In the hours before

Local storm report, Mar 26, 9:55 AM CDT, 3 hours 45 minutes before

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Local storm report, Mar 26, 9:59 AM CDT, 3 hours 41 minutes before

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Local storm report, Mar 26, 10:00 AM CDT, 3 hours 40 minutes before

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Local storm report, Mar 26, 11:49 AM CDT, 1 hour 51 minutes before

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Local storm report, Mar 26, 12:27 PM CDT, 1 hour 13 minutes before

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Local storm report, Mar 26, 12:28 PM CDT, 1 hour 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 11:56 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	64 min
Mar 26, 12:08 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana	67 min
Mar 26, 12:43 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena, Tangipahoa, Washington	62 min
Mar 26, 1:14 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 7 more	61 min
Mar 26, 1:46 AM CDT	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa, Washington	59 min
Mar 26, 1:49 AM CDT	Special Marine Warning	LIX		116 min
Mar 26, 2:13 AM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa, Washington	32 min
Mar 26, 2:19 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Jefferson, Livingston, Saint Charles, Saint James, Saint John the Baptist and 3 more	56 min
Mar 26, 3:02 AM CDT	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne	58 min
Mar 26, 3:12 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Saint Charles	63 min
Mar 26, 3:29 AM CDT	Coastal Flood Watch	LIX	Saint Bernard, Saint John the Baptist	26 hr
Mar 26, 4:09 AM CDT	Special Marine Warning	LIX		2 hr
Mar 26, 4:15 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Plaquemines, Saint Bernard	60 min
Mar 26, 6:17 AM CDT	Special Marine Warning	LIX		118 min
Mar 26, 7:09 AM CDT	Special Marine Warning	LIX		2 hr
Mar 26, 7:37 AM CDT	Areal Flood Advisory	LIX	Ascension, Lafourche, Livingston, Saint Tammany, Tangipahoa, Terrebonne	98 days
Mar 26, 6:38 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	67 min
Mar 26, 6:46 PM CDT	Tornado Warning	LIX	Pointe Coupee, West Feliciana	29 min
Mar 26, 3:30 AM CDT	Tornado Warning	LIX	Pearl River	15 min
Mar 26, 4:02 AM CDT	Severe Thunderstorm Warning	LIX	Hancock	43 min
Mar 26, 5:20 AM CDT	Severe Thunderstorm Warning	LIX	Jackson	55 min
Mar 26, 9:42 AM CDT	River Flood Warning	LIX	Jackson	13 days

Nearby

Severe Thunderstorm Warnings in Louisiana, 2009 Severe Thunderstorm Warnings in Mississippi, 2009 Every severe thunderstorm warning in 2009

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.