Alert archive / Louisiana / Special Weather Statements in 2017

Special Weather Statement, NWS New Orleans, LA

July 22, 2017Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jul 22, 2017, 2:39 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 36 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 22, 2017, 2:39 PM CDT (19:39 UTC)
Expired: Jul 22, 2017, 3:15 PM CDT
In force: 36 min
Issued by: NWS New Orleans, LA

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 47 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: 2601 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 22, 3:33 AM CDT	Special Marine Warning	LIX		42 min
Jul 22, 6:32 AM CDT	Special Weather Statement	LIX	Orleans	58 min
Jul 22, 7:58 AM CDT	Special Marine Warning	LIX		32 min
Jul 22, 8:22 AM CDT	Special Marine Warning	LIX		53 min
Jul 22, 8:24 AM CDT	Special Weather Statement	LIX	Saint Tammany	36 min
Jul 22, 1:25 PM CDT	Special Weather Statement	LIX	Orleans	35 min
Jul 22, 1:36 PM CDT	Special Weather Statement	LIX	Saint Charles	39 min
Jul 22, 1:59 PM CDT	Special Weather Statement	LIX	Orleans	31 min
Jul 22, 2:06 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans	114 min
Jul 22, 2:06 PM CDT	Special Weather Statement	LIX	Livingston	39 min
Jul 22, 2:32 PM CDT	Special Weather Statement	LIX	Iberville	43 min
Jul 22, 2:38 PM CDT	Special Weather Statement	LIX	Saint Helena	52 min
Jul 22, 3:04 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	56 min
Jul 22, 3:27 PM CDT	Areal Flood Advisory	LIX	Saint Helena, Tangipahoa	63 min
Jul 22, 4:08 AM CDT	Special Weather Statement	LIX	Harrison	52 min
Jul 22, 1:08 PM CDT	Special Weather Statement	LIX	Hancock	37 min
Jul 22, 1:14 PM CDT	Special Weather Statement	LIX	Stone	31 min

Nearby

Special Weather Statements in Louisiana, 2017 Every special weather statement in 2017

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.