Alert archive / Louisiana / Special Weather Statements in 2019

Special Weather Statement, NWS New Orleans, LA

August 4, 2019Livingston Parish, Saint John the Baptist Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Aug 4, 2019, 3:19 PM CDT for Livingston Parish, Saint John the Baptist Parish, Louisiana. It was in force for 41 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: Aug 4, 2019, 3:19 PM CDT (20:19 UTC)
Expired: Aug 4, 2019, 4:00 PM CDT
In force: 41 min
Issued by: NWS New Orleans, LA

Counties Livingston Parish, LA, Saint John the Baptist Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.3 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: 1270 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -38 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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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 3:19 PM CDT, 0 minutes earlier.

Area forecast discussion, Aug 4, 3:19 PM CDT, 0 minutes before

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Hazardous weather outlook, Aug 4, 1:00 PM CDT, 2 hours 19 minutes before

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In the hours before

Special weather statement, Aug 4, 3:19 PM CDT, 0 minutes before

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Nearby

Special Weather Statements in Louisiana, 2019 Every special weather statement 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.