Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 102, NWS New Orleans, LA

June 7, 2019Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 7, 2019, 2:20 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 25 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: Jun 7, 2019, 2:20 PM CDT (19:20 UTC)
Expired: Jun 7, 2019, 2:45 PM CDT
In force: 25 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.3 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.

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: 2462 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.8

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 Jun 7, 2:02 PM CDT, 18 minutes earlier.

Area forecast discussion, Jun 7, 2:02 PM CDT, 18 minutes before

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Hazardous weather outlook, Jun 7, 12:57 PM CDT, 1 hour 23 minutes before

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In the hours before

Special weather statement, Jun 7, 10:20 AM CDT, 4 hours before

Special Weather Statement
National Weather Service New Orleans LA
1020 AM CDT Fri Jun 7 2019

LAZ059-065>067-071615-
Lower Terrebonne-Upper Terrebonne-Lower Lafourche-Upper Lafourche-
1020 AM CDT Fri Jun 7 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TERREBONNE AND
NORTHERN LAFOURCHE PARISHES...

At 1020 AM CDT, a strong thunderstorm was located over Schriever, or
near Thibodaux, moving east at 30 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Houma, Thibodaux, Larose, Cut Off, Lockport, Mathews, Schriever,
Gray, Raceland, Bayou Cane, Des Allemands and Bayou Gauche.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 2961 9110 2980 9094 2990 9056 2989 9054
      2982 9047 2981 9047 2979 9044 2948 9017
TIME...MOT...LOC 1520Z 269DEG 28KT 2970 9083

CAB

Special weather statement, Jun 7, 11:25 AM CDT, 2 hours 55 minutes before

Special Weather Statement
National Weather Service New Orleans LA
1125 AM CDT Fri Jun 7 2019

MSZ081-082-071730-
Jackson-Harrison-
1125 AM CDT Fri Jun 7 2019

...A STRONG THUNDERSTORM WILL AFFECT HARRISON AND WESTERN JACKSON
COUNTIES...

At 1125 AM CDT, a strong thunderstorm was located near Saucier, or 16
miles northwest of Gulfport, moving east at 30 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Gulfport, Biloxi, Ocean Springs, Long Beach, St. Martin, D'iberville,
Latimer, Lyman, Saucier, Gulf Hills, Gulf Park Estates, Vancleave and
Gulfport Airport.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3037 8885 3038 8885 3038 8878 3043 8885
      3042 8901 3040 8886 3038 8907 3031 8929
      3035 8928 3037 8930 3065 8929 3065 8925
      3068 8924 3067 8889 3074 8888 3074 8871
      3034 8871
TIME...MOT...LOC 1625Z 268DEG 26KT 3060 8918

Special weather statement, Jun 7, 12:32 PM CDT, 1 hour 48 minutes before

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Local storm report, Jun 7, 1:33 PM CDT, 47 minutes before

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Local storm report, Jun 7, 1:48 PM CDT, 32 minutes before

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Special weather statement, Jun 7, 2:14 PM CDT, 6 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
Jun 7, 9:26 AM CDT	Special Weather Statement	LIX	Assumption	49 min
Jun 7, 9:33 AM CDT	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint James	27 min
Jun 7, 9:44 AM CDT	Special Weather Statement	LIX	Tangipahoa	61 min
Jun 7, 10:12 AM CDT	Special Weather Statement	LIX	Saint Tammany	63 min
Jun 7, 10:20 AM CDT	Special Weather Statement	LIX	Lafourche	55 min
Jun 7, 10:27 AM CDT	Special Marine Warning	LIX		2 hr
Jun 7, 11:50 AM CDT	Special Marine Warning	LIX		115 min
Jun 7, 12:33 PM CDT	Special Marine Warning	LIX		57 min
Jun 7, 2:14 PM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	61 min
Jun 7, 3:05 PM CDT	Special Marine Warning	LIX		115 min
Jun 7, 4:01 PM CDT	Special Weather Statement	LIX	West Feliciana	59 min
Jun 7, 4:07 PM CDT	Special Weather Statement	LIX	Jefferson	53 min
Jun 7, 5:11 PM CDT	Special Weather Statement	LIX	East Feliciana, Saint Helena	64 min
Jun 7, 5:22 PM CDT	Special Marine Warning	LIX		83 min
Jun 7, 6:23 PM CDT	Special Marine Warning	LIX		97 min
Jun 7, 6:40 PM CDT	Special Weather Statement	LIX	Washington	65 min
Jun 7, 9:45 AM CDT	Special Weather Statement	LIX	Jackson	45 min
Jun 7, 10:03 AM CDT	Special Weather Statement	LIX	Pearl River	42 min
Jun 7, 11:25 AM CDT	Special Weather Statement	LIX	Harrison	65 min
Jun 7, 11:49 AM CDT	Severe Thunderstorm Warning	LIX	Harrison, Jackson	56 min
Jun 7, 12:12 PM CDT	Severe Thunderstorm Warning	LIX	Jackson	48 min
Jun 7, 12:32 PM CDT	Special Weather Statement	LIX	Jackson	58 min
Jun 7, 2:59 PM CDT	Special Weather Statement	LIX	Harrison	61 min
Jun 7, 3:22 PM CDT	Severe Thunderstorm Warning	LIX	Jackson	43 min
Jun 7, 3:23 PM CDT	Special Weather Statement	LIX	Harrison	67 min
Jun 7, 3:29 PM CDT	Severe Thunderstorm Warning	LIX	Harrison	76 min
Jun 7, 3:59 PM CDT	Special Weather Statement	LIX	Amite	61 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019 Every severe thunderstorm warning in 2019

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.