Alert archive / Louisiana / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 103, NWS New Orleans, LA

July 5, 2015Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jul 5, 2015, 3:38 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 37 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: Jul 5, 2015, 3:38 PM CDT (20:38 UTC)
Expired: Jul 5, 2015, 4:15 PM CDT
In force: 37 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.6 hours before the alert went out and 80 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: 2701 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 835 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 5, 3:28 PM CDT, 10 minutes earlier.

Area forecast discussion, Jul 5, 3:28 PM CDT, 10 minutes before

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Hazardous weather outlook, Jul 5, 3:50 AM CDT, 11 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
350 AM CDT SUN JUL 5 2015

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037-
039-040-046>050-056>072-MSZ068>071-077-080>082-052100-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND-
LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND-
COASTAL WATERS FROM 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 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-
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-NORTHERN TANGIPAHOA-
SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER-
HANCOCK-HARRISON-JACKSON-
350 AM CDT SUN JUL 5 2015

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. WHILE AN ISOLATED
STRONG OR SEVERE THUNDERSTORM WILL BE POSSIBLE...WIDESPREAD OR
ORGANIZED SEVERE WEATHER IS NOT EXPECTED. MAIN HAZARDS WILL BE
STRONG WIND GUSTS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH MUCH OF THE WEEK.
THE RISK OF WIDESPREAD HAZARDOUS WEATHER IS LOW BUT THE
POSSIBILITY OF A STRONG OR ISOLATED SEVERE THUNDERSTORM WILL
REMAIN THROUGH FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

In the hours before

Special weather statement, Jul 5, 11:54 AM CDT, 3 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1154 AM CDT SUN JUL 5 2015

MSZ082-051745-
JACKSON MS-
1154 AM CDT SUN JUL 5 2015

...SPECIAL WEATHER STATEMENT...

AT 1154 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER HELENA...OR NEAR MOSS POINT...MOVING NORTHEAST AT 5 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
OCEAN SPRINGS...MOSS POINT...ST. MARTIN...ESCATAWPA...GAUTIER...GULF
HILLS...LATIMER...GULF PARK ESTATES...VANCLEAVE...HICKORY HILLS...
HELENA AND BIG POINT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3036 8840 3034 8850 3034 8857 3037 8859
      3037 8860 3036 8862 3037 8863 3034 8874
      3038 8880 3038 8882 3039 8879 3043 8887
      3067 8888 3067 8886 3057 8841
TIME...MOT...LOC 1654Z 206DEG 5KT 3047 8847

CAB

Special weather statement, Jul 5, 1:29 PM CDT, 2 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
129 PM CDT SUN JUL 5 2015

MSZ070-071-051915-
PIKE MS-WALTHALL MS-
129 PM CDT SUN JUL 5 2015

...SPECIAL WEATHER STATEMENT...

AT 128 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SUMMIT...OR NEAR MCCOMB...MOVING EAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM. IF THIS STORM CONTINUES TO STRENGTHEN A SEVERE
THUNDERSTORM WARNING MAY BE NEEDED QUICKLY.

LOCATIONS IMPACTED INCLUDE...
MCCOMB...SUMMIT...TYLERTOWN AND SALEM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3133 9008 3134 9004 3124 9004 3123 9003
      3118 9003 3117 9001 3109 9001 3122 9054
      3135 9055 3135 9011
TIME...MOT...LOC 1828Z 278DEG 15KT 3134 9051

CAB

Special weather statement, Jul 5, 2:36 PM CDT, 1 hour 2 minutes before

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Special weather statement, Jul 5, 2:50 PM CDT, 48 minutes before

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Local storm report, Jul 5, 3:05 PM CDT, 33 minutes before

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Local storm report, Jul 5, 3:19 PM CDT, 19 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
Jul 5, 10:08 AM CDT	Special Marine Warning	LIX		67 min
Jul 5, 11:06 AM CDT	Special Marine Warning	LIX		54 min
Jul 5, 11:30 AM CDT	Special Marine Warning	LIX		90 min
Jul 5, 12:45 PM CDT	Special Marine Warning	LIX		90 min
Jul 5, 1:49 PM CDT	Special Marine Warning	LIX		26 min
Jul 5, 2:20 PM CDT	Special Marine Warning	LIX		25 min
Jul 5, 2:33 PM CDT	Special Marine Warning	LIX		27 min
Jul 5, 2:50 PM CDT	Special Weather Statement	LIX	Pointe Coupee, West Baton Rouge, West Feliciana	40 min
Jul 5, 2:55 PM CDT	Severe Thunderstorm Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	65 min
Jul 5, 3:00 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	30 min
Jul 5, 3:06 PM CDT	Special Marine Warning	LIX		24 min
Jul 5, 3:19 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, West Baton Rouge	56 min
Jul 5, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	37 min
Jul 5, 3:28 PM CDT	Special Marine Warning	LIX		62 min
Jul 5, 3:34 PM CDT	Special Marine Warning	LIX		26 min
Jul 5, 4:01 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston, West Baton Rouge	44 min
Jul 5, 4:14 PM CDT	Special Marine Warning	LIX		61 min
Jul 5, 4:29 PM CDT	Special Marine Warning	LIX		61 min
Jul 5, 4:32 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena	28 min
Jul 5, 4:34 PM CDT	Severe Thunderstorm Warning	LIX	Livingston	26 min
Jul 5, 4:42 PM CDT	Severe Thunderstorm Warning	LIX	Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington	36 min
Jul 5, 4:50 PM CDT	Severe Thunderstorm Warning	LIX	Livingston, Saint Tammany, Tangipahoa	40 min
Jul 5, 4:57 PM CDT	Special Weather Statement	LIX	Orleans, Saint Charles, Saint John the Baptist	63 min
Jul 5, 5:04 PM CDT	Special Marine Warning	LIX		26 min
Jul 5, 5:17 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Saint Bernard	28 min
Jul 5, 5:23 PM CDT	Special Marine Warning	LIX		52 min
Jul 5, 5:29 PM CDT	Special Marine Warning	LIX		61 min
Jul 5, 5:31 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	29 min
Jul 5, 5:38 PM CDT	Special Marine Warning	LIX		52 min
Jul 5, 5:52 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	23 min
Jul 5, 6:07 PM CDT	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	23 min
Jul 5, 6:10 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Plaquemines, Saint Bernard, Saint Charles	33 min
Jul 5, 6:25 PM CDT	Special Weather Statement	LIX	Jefferson, Lafourche, Terrebonne	50 min
Jul 5, 6:49 PM CDT	Special Marine Warning	LIX		116 min
Jul 5, 10:54 AM CDT	Special Weather Statement	LIX	Harrison	36 min
Jul 5, 1:29 PM CDT	Special Weather Statement	LIX	Walthall	46 min
Jul 5, 1:56 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	34 min
Jul 5, 2:36 PM CDT	Special Weather Statement	LIX	Pearl River	54 min
Jul 5, 3:58 PM CDT	Severe Thunderstorm Warning	LIX	Amite, Wilkinson	32 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2015 Every severe thunderstorm warning in 2015

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.