Alert archive / Louisiana / Heat Advisories in 2021
Heat Advisory 26, NWS New Orleans, LA
NWS New Orleans, LA issued this heat advisory at Sep 7, 2021, 3:47 AM CDT for 5 parishes in Louisiana. It took effect at Sep 7, 2021, 11:00 AM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Sep 7, 2021, 3:47 AM CDT (08:47 UTC)
- In effect from
- Sep 7, 2021, 11:00 AM CDT
- Expired
- Sep 7, 2021, 5:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS New Orleans, LA
Counties Assumption Parish, LA, Iberville Parish, LA, Orleans Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 8.8 hours before the alert went out and 100 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
- 1597 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 976 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory 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 heat advisory went out at Sep 6, 11:16 PM CDT, 4 hours 31 minutes earlier.
Area forecast discussion, Sep 6, 11:16 PM CDT, 4 hours 31 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 7, 4:13 AM CDT | Special Marine Warning | LIX | 67 min | |
| Sep 7, 3:37 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Charles | 95 min |
| Sep 7, 3:52 PM CDT | Heat Advisory | LIX | Saint James, Saint John the Baptist | 25 hr |
| Sep 7, 3:57 PM CDT | Special Weather Statement | LIX | Saint Tammany | 78 min |
| Sep 7, 4:52 PM CDT | Areal Flood Advisory | LIX | Ascension, Assumption, Saint James | 35 min |
| Sep 7, 2:02 PM CDT | Special Weather Statement | LIX | Harrison | 58 min |
| Sep 7, 3:27 PM CDT | Special Weather Statement | LIX | Hancock | 78 min |
Nearby
Heat Advisories in Louisiana, 2021Every heat advisory 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.