Alert archive / Louisiana / Heat Advisories in 2021
Heat Advisory 27, NWS New Orleans, LA
NWS New Orleans, LA issued this heat advisory at Sep 7, 2021, 3:52 PM CDT for Saint James Parish, Saint John the Baptist Parish, Louisiana. It took effect at Sep 8, 2021, 9:00 AM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Sep 7, 2021, 3:52 PM CDT (20:52 UTC)
- In effect from
- Sep 8, 2021, 9:00 AM CDT
- Expired
- Sep 8, 2021, 5:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS New Orleans, LA
Counties Saint James Parish, LA, Saint John the Baptist Parish, LA
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 8.9 hours before the alert went out and 255 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
- 76 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 61 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 7, 3:09 PM CDT, 43 minutes earlier.
Area forecast discussion, Sep 7, 3:09 PM CDT, 43 minutes before
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Local storm report, Sep 7, 10:18 AM CDT, 5 hours 34 minutes before
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</html>Special weather statement, Sep 7, 2:02 PM CDT, 1 hour 50 minutes before
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</html>Special weather statement, Sep 7, 3:27 PM CDT, 25 minutes before
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<main class="wrap">
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<div class="status" id="status">Temporary Notice</div>
<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.
</p>
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Please try again in a few minutes.
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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, 3:47 AM CDT | Heat Advisory | LIX | Assumption, Iberville, Orleans, Saint James, Saint John the Baptist | 13 hr |
| 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, 3:57 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.