Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

February 17, 2021Orleans Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Feb 17, 2021, 7:47 PM CST for Orleans Parish, Louisiana. It was in force for 88 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: Feb 17, 2021, 7:47 PM CST (01:47 UTC)
Expired: Feb 17, 2021, 9:15 PM CST
In force: 88 min
Issued by: NWS New Orleans, LA

County Orleans Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.8 hours before the alert went out and 41 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 452 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 966 m²/s²
0-3 km storm-relative helicity: 1216 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 Feb 17, 4:08 PM CST, 3 hours 39 minutes earlier.

Area forecast discussion, Feb 17, 4:08 PM CST, 3 hours 39 minutes before

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In the hours before

Local storm report, Feb 17, 4:49 PM CST, 2 hours 58 minutes before

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Special weather statement, Feb 17, 7:47 PM CST, 0 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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
Feb 17, 7:50 PM CST	Special Weather Statement	LIX	Jefferson, Plaquemines	85 min
Feb 17, 7:54 PM CST	Special Marine Warning	LIX		66 min
Feb 17, 8:23 PM CST	Special Marine Warning	LIX		97 min
Feb 17, 8:25 PM CST	Special Marine Warning	LIX		65 min
Feb 17, 9:00 PM CST	Special Marine Warning	LIX		94 min
Feb 17, 9:19 PM CST	Special Weather Statement	LIX	Plaquemines	116 min
Feb 17, 9:30 PM CST	Special Marine Warning	LIX		2 hr
Feb 17, 10:00 PM CST	Special Marine Warning	LIX		2 hr
Feb 17, 11:33 PM CST	Special Marine Warning	LIX		87 min
Feb 18, 9:28 AM CST	River Flood Warning	LIX	Saint Tammany, Washington	10 days
Feb 18, 10:04 AM CST	Freeze Warning	LIX	Assumption, Saint Bernard, Saint James, Saint John the Baptist	23 hr
Feb 18, 10:04 AM CST	Hard Freeze Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, Tangipahoa and 3 more	23 hr
Feb 18, 10:55 AM CST	River Flood Warning	LIX	Saint Tammany	4 days

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.