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 5, 2021, 5:00 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 30 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 5, 2021, 5:00 PM CDT (22:00 UTC)
- Expired
- Sep 5, 2021, 5:30 PM CDT
- In force
- 30 min
- Issued by
- NWS New Orleans, LA
- Hail
- 0.00 in
- Wind
- 30
County Tangipahoa Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 69 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
- 23 J/kg
- Mixed-layer CIN
- -384 J/kg
- Mixed-layer LCL
- 1363 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
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 5, 4:15 PM CDT, 45 minutes earlier.
Area forecast discussion, Sep 5, 4:15 PM CDT, 45 minutes before
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Special weather statement, Sep 5, 2:28 PM CDT, 2 hours 32 minutes before
Special Weather Statement
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
228 PM CDT Sun Sep 5 2021
LAZ059-065-066-052000-
Lower Terrebonne LA-Upper Terrebonne LA-Upper Lafourche LA-
228 PM CDT Sun Sep 5 2021
...A strong thunderstorm will impact portions of northeastern
Terrebonne and central Lafourche Parishes through 300 PM CDT...
At 227 PM CDT, Doppler radar was tracking a strong thunderstorm over
Houma, moving south at 10 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Houma, Montegut, Bayou Cane, Chauvin, Gray and Dulac.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2937 9079 2963 9086 2970 9067 2956 9057
2954 9057 2954 9056 2952 9054 2950 9054
2950 9052 2948 9051
TIME...MOT...LOC 1927Z 337DEG 11KT 2959 9073
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
BrazzellSpecial weather statement, Sep 5, 3:01 PM CDT, 1 hour 59 minutes before
Special Weather Statement
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
301 PM CDT Sun Sep 5 2021
LAZ059-065>067-052030-
Lower Terrebonne LA-Upper Terrebonne LA-Lower Lafourche LA-
Upper Lafourche LA-
301 PM CDT Sun Sep 5 2021
...A strong thunderstorm will impact portions of east central
Terrebonne and central Lafourche Parishes through 330 PM CDT...
At 300 PM CDT, Doppler radar was tracking a strong thunderstorm near
Chauvin, or 7 miles southeast of Houma, moving southeast at 15 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Houma, Larose, Lockport, Dulac, Montegut and Chauvin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2957 9084 2966 9044 2939 9038 2933 9049
2934 9050 2934 9051 2935 9051 2936 9052
2933 9052 2933 9050 2932 9052 2932 9053
2931 9053 2925 9065
TIME...MOT...LOC 2000Z 328DEG 12KT 2949 9064
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPHSpecial weather statement, Sep 5, 5:00 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 5, 2:28 PM CDT | Special Weather Statement | LIX | Terrebonne | 32 min |
| Sep 5, 2:55 PM CDT | Areal Flood Advisory | LIX | Lafourche, Terrebonne | 2 hr |
| Sep 5, 2:57 PM CDT | Heat Advisory | LIX | Assumption, East Baton Rouge, East Feliciana, Iberville, Orleans, Pointe Coupee and 9 more | 27 hr |
| Sep 5, 3:01 PM CDT | Special Weather Statement | LIX | Lafourche | 29 min |
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.