Alert archive / Louisiana / Special Weather Statements in 2021
Special Weather Statement, NWS New Orleans, LA
NWS New Orleans, LA issued this special weather statement at Sep 14, 2021, 10:20 PM CDT for Terrebonne Parish, Louisiana. It was in force for 55 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 14, 2021, 10:20 PM CDT (03:20 UTC)
- Expired
- Sep 14, 2021, 11:15 PM CDT
- In force
- 55 min
- Issued by
- NWS New Orleans, LA
- Hail
- 0.00 in
- Wind
- 50
- Spout
- Possible
County Terrebonne Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 3.3 hours before the alert went out and 136 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.
- Mixed-layer CAPE
- 136 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 589 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
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</html>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 14, 9:14 PM CDT, 1 hour 6 minutes earlier.
Area forecast discussion, Sep 14, 9:14 PM CDT, 1 hour 6 minutes before
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</html>In the hours before
Special weather statement, Sep 14, 4:51 PM CDT, 5 hours 29 minutes before
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</html>Special weather statement, Sep 14, 10:20 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 10:38 PM CDT | Tornado Warning | LIX | Terrebonne | 37 min |
| Sep 15, 2:33 AM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles | 117 min |
| Sep 15, 3:12 AM CDT | Areal Flood Advisory | LIX | Tangipahoa | 2 hr |
| Sep 15, 3:29 AM CDT | Tornado Warning | LIX | Plaquemines, Saint Bernard | 31 min |
| Sep 15, 4:09 AM CDT | Tornado Warning | LIX | Orleans, Saint Bernard | 13 min |
| Sep 15, 4:32 AM CDT | Special Marine Warning | LIX | 58 min | |
| Sep 15, 5:21 AM CDT | Flash Flood Warning | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Sep 15, 6:22 AM CDT | Tornado Warning | LIX | Saint Tammany | 23 min |
| Sep 15, 7:14 AM CDT | Special Marine Warning | LIX | 91 min | |
| Sep 15, 7:45 AM CDT | Flash Flood Warning | LIX | Washington | 3 hr |
| Sep 15, 7:55 AM CDT | River Flood Warning | LIX | Saint Tammany | 4 days |
| Sep 15, 7:55 AM CDT | River Flood Warning | LIX | Saint Tammany | 49 hr |
| Sep 15, 8:18 AM CDT | Flash Flood Warning | LIX | Orleans, Saint Tammany, Washington | 5 hr |
| Sep 15, 8:28 AM CDT | Special Marine Warning | LIX | 62 min | |
| Sep 15, 8:37 AM CDT | River Flood Warning | LIX | Tangipahoa | 28 hr |
| Sep 15, 8:50 AM CDT | Special Marine Warning | LIX | 55 min | |
| Sep 15, 8:59 AM CDT | River Flood Warning | LIX | East Baton Rouge | 28 hr |
| Sep 15, 9:02 AM CDT | River Flood Warning | LIX | Saint Tammany | 6 days |
| Sep 15, 9:04 AM CDT | River Flood Warning | LIX | Saint Helena | 4 days |
| Sep 15, 9:08 AM CDT | River Flood Warning | LIX | Saint Tammany, Washington | 5 days |
| Sep 15, 9:08 AM CDT | River Flood Warning | LIX | Saint Tammany | 7 days |
| Sep 15, 9:59 AM CDT | Special Marine Warning | LIX | 61 min | |
| Sep 15, 3:39 PM CDT | River Flood Warning | LIX | Livingston | 42 hr |
| Sep 15, 3:39 PM CDT | River Flood Warning | LIX | Washington | 21 hr |
| Sep 15, 6:13 PM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge | 3 hr |
| Sep 15, 6:19 AM CDT | Areal Flood Advisory | LIX | Hancock, Harrison, Pearl River | 45 min |
| Sep 15, 7:04 AM CDT | Flash Flood Warning | LIX | Hancock, Pearl River | 3 hr |
| Sep 15, 8:11 AM CDT | Flash Flood Warning | LIX | Harrison | 5 hr |
| Sep 15, 8:22 AM CDT | Flash Flood Warning | LIX | Jackson | 6 hr |
| Sep 15, 8:37 AM CDT | River Flood Warning | LIX | Pike | 37 hr |
| Sep 15, 8:52 AM CDT | River Flood Warning | LIX | Hancock | 28 hr |
| Sep 15, 8:52 AM CDT | River Flood Warning | LIX | Harrison | 43 hr |
| Sep 15, 9:02 AM CDT | River Flood Warning | LIX | Pike, Walthall | 46 hr |
Nearby
Special Weather Statements in Louisiana, 2021Every 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.