Alert archive / Louisiana / Special Weather Statements in 2015

Special Weather Statement, NWS New Orleans, LA

July 20, 2015Jefferson Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jul 20, 2015, 9:24 AM CDT for Jefferson Parish, Louisiana. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2015, 9:24 AM CDT (14:24 UTC)
Expired: Jul 20, 2015, 10:15 AM CDT
In force: 51 min
Issued by: NWS New Orleans, LA

County Jefferson Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.4 hours before the alert went out and 111 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: 3502 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 19, 7:37 PM CDT	Special Marine Warning	LIX		98 min
Jul 19, 8:28 PM CDT	Special Weather Statement	LIX	Saint Charles	47 min
Jul 20, 3:43 AM CDT	Heat Advisory	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more	12 hr
Jul 20, 5:47 AM CDT	Special Marine Warning	LIX		28 min
Jul 20, 6:11 AM CDT	Special Marine Warning	LIX		34 min
Jul 20, 7:32 AM CDT	Special Marine Warning	LIX		28 min
Jul 20, 7:35 AM CDT	Special Weather Statement	LIX	Terrebonne	40 min
Jul 20, 7:39 AM CDT	Special Marine Warning	LIX		36 min
Jul 20, 12:54 PM CDT	Special Weather Statement	LIX	Orleans	66 min
Jul 20, 1:58 PM CDT	Special Weather Statement	LIX	Assumption	62 min
Jul 20, 2:59 PM CDT	Special Weather Statement	LIX	Assumption	46 min
Jul 20, 3:48 PM CDT	Special Weather Statement	LIX	East Baton Rouge	42 min
Jul 20, 1:43 PM CDT	Special Weather Statement	LIX	Hancock, Harrison, Jackson	62 min

Nearby

Special Weather Statements in Louisiana, 2015 Every special weather statement 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.