Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 107, NWS New Orleans, LA

June 17, 2019Livingston Parish, Saint Helena Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 17, 2019, 1:03 PM CDT for Livingston Parish, Saint Helena Parish, Tangipahoa Parish, Louisiana. It was in force for 27 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 17, 2019, 1:03 PM CDT (18:03 UTC)
Expired: Jun 17, 2019, 1:30 PM CDT
In force: 27 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Livingston Parish, LA, Saint Helena Parish, LA, Tangipahoa Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 6.1 hours before the alert went out and 195 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: 170 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 104 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 Jun 17, 12:53 PM CDT, 10 minutes earlier.

Area forecast discussion, Jun 17, 12:53 PM CDT, 10 minutes before

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Hazardous weather outlook, Jun 17, 11:44 AM CDT, 1 hour 19 minutes before

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In the hours before

Special weather statement, Jun 17, 11:51 AM CDT, 1 hour 12 minutes before

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Special weather statement, Jun 17, 12:04 PM CDT, 59 minutes before

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Special weather statement, Jun 17, 12:11 PM CDT, 52 minutes before

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Special weather statement, Jun 17, 12:29 PM CDT, 34 minutes before

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Special weather statement, Jun 17, 12:33 PM CDT, 30 minutes before

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Special weather statement, Jun 17, 12:54 PM CDT, 9 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 17, 11:48 AM CDT	Special Weather Statement	LIX	Saint Helena	27 min
Jun 17, 12:04 PM CDT	Special Weather Statement	LIX	Ascension, Saint James	26 min
Jun 17, 12:11 PM CDT	Special Weather Statement	LIX	Saint Helena	34 min
Jun 17, 12:29 PM CDT	Special Weather Statement	LIX	Saint Helena	31 min
Jun 17, 12:33 PM CDT	Special Weather Statement	LIX	Saint John the Baptist	27 min
Jun 17, 12:54 PM CDT	Special Weather Statement	LIX	Livingston	36 min
Jun 17, 1:29 PM CDT	Special Weather Statement	LIX	Tangipahoa	31 min
Jun 17, 1:31 PM CDT	Special Weather Statement	LIX	Washington	59 min
Jun 17, 1:44 PM CDT	Special Weather Statement	LIX	Saint James	61 min
Jun 17, 2:08 PM CDT	Special Weather Statement	LIX	Ascension, Assumption, Saint James	67 min
Jun 17, 2:52 PM CDT	Special Weather Statement	LIX	Saint Tammany, Washington	53 min
Jun 17, 3:02 PM CDT	Special Weather Statement	LIX	Ascension, Livingston	13 min
Jun 17, 3:21 PM CDT	Special Weather Statement	LIX	Washington	9 min
Jun 17, 3:28 PM CDT	Special Weather Statement	LIX	Saint John the Baptist	32 min
Jun 17, 3:46 PM CDT	Special Marine Warning	LIX		44 min
Jun 17, 3:53 PM CDT	Special Weather Statement	LIX	Orleans	37 min
Jun 17, 4:24 PM CDT	Special Marine Warning	LIX		2 hr
Jun 17, 4:26 PM CDT	Special Marine Warning	LIX		34 min
Jun 17, 4:28 PM CDT	Special Weather Statement	LIX	Saint Tammany	32 min
Jun 17, 6:26 PM CDT	Special Marine Warning	LIX		2 hr
Jun 17, 6:53 PM CDT	Special Weather Statement	LIX	Jefferson	67 min
Jun 16, 7:03 PM CDT	Special Weather Statement	LIX	Hancock	57 min
Jun 16, 7:40 PM CDT	Special Weather Statement	LIX	Pearl River	65 min
Jun 16, 7:42 PM CDT	Special Weather Statement	LIX	Hancock	63 min
Jun 17, 11:51 AM CDT	Special Weather Statement	LIX	Amite	24 min
Jun 17, 1:24 PM CDT	Special Weather Statement	LIX	Pike, Walthall	36 min
Jun 17, 2:24 PM CDT	Special Weather Statement	LIX	Pearl River	66 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.