Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

September 6, 2021Orleans Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Sep 6, 2021, 12:49 PM CDT for Orleans Parish, Louisiana. It was in force for 26 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: Sep 6, 2021, 12:49 PM CDT (17:49 UTC)
Expired: Sep 6, 2021, 1:15 PM CDT
In force: 26 min
Issued by: NWS New Orleans, LA
Hail: 0.00 in
Wind: 30

County Orleans Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.8 hours before the alert went out and 43 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: 2809 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 623 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 10 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 Sep 6, 11:35 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Sep 6, 11:35 AM CDT, 1 hour 14 minutes before

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In the hours before

Special weather statement, Sep 6, 8:38 AM CDT, 4 hours 11 minutes before

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Special weather statement, Sep 6, 9:39 AM CDT, 3 hours 10 minutes before

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Special weather statement, Sep 6, 12:39 PM CDT, 10 minutes before

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Special weather statement, Sep 6, 12:45 PM CDT, 4 minutes before

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Special weather statement, Sep 6, 12:47 PM CDT, 2 minutes before

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Special weather statement, Sep 6, 12:49 PM CDT, 0 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
Sep 6, 4:00 AM CDT	Flash Flood Watch	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Orleans, Pointe Coupee and 9 more	17 hr
Sep 6, 9:39 AM CDT	Special Weather Statement	LIX	Washington	36 min
Sep 6, 12:45 PM CDT	Special Weather Statement	LIX	Lafourche	30 min
Sep 6, 12:47 PM CDT	Special Weather Statement	LIX	Saint Charles	28 min
Sep 6, 1:05 PM CDT	Areal Flood Advisory	LIX	Lafourche, Saint Charles	115 min
Sep 6, 1:17 PM CDT	Special Weather Statement	LIX	Orleans, Saint Charles	58 min
Sep 6, 1:24 PM CDT	Special Marine Warning	LIX		66 min
Sep 6, 1:30 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Charles	81 min
Sep 6, 1:37 PM CDT	Special Marine Warning	LIX		98 min
Sep 6, 1:54 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	111 min
Sep 6, 7:17 AM CDT	Special Weather Statement	LIX	Wilkinson	28 min
Sep 6, 7:45 AM CDT	Special Weather Statement	LIX	Wilkinson	15 min
Sep 6, 7:59 AM CDT	Special Weather Statement	LIX	Amite	16 min
Sep 6, 8:09 AM CDT	Flash Flood Warning	LIX	Wilkinson	2 hr
Sep 6, 8:38 AM CDT	Special Weather Statement	LIX	Amite	67 min
Sep 6, 12:39 PM CDT	Special Weather Statement	LIX	Jackson	36 min
Sep 6, 12:51 PM CDT	Special Weather Statement	LIX	Harrison	24 min
Sep 6, 1:20 PM CDT	Special Weather Statement	LIX	Jackson	25 min

Nearby

Special Weather Statements in Louisiana, 2021 Every special weather statement in 2021

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.