Alert archive / Louisiana / Heat Advisories in 2011

Heat Advisory 7, NWS New Orleans, LA

August 5, 201113 parishes in Louisiana; 5 counties in Mississippi

NWS New Orleans, LA issued this heat advisory at Aug 5, 2011, 2:21 PM CDT for 13 parishes in Louisiana; 5 counties in Mississippi. It took effect at Aug 5, 2011, 7:00 PM CDT. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued
Aug 5, 2011, 2:21 PM CDT (19:21 UTC)
In effect from
Aug 5, 2011, 7:00 PM CDT
Expired
Aug 6, 2011, 7:00 PM CDT
In force
24 hr
Issued by
NWS New Orleans, LA

Counties Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 108 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2011-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2440 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2011-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2440 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
812 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 12:40 AM CDTSpecial Marine WarningLIX65 min
Aug 5, 1:14 AM CDTSpecial Marine WarningLIX61 min
Aug 5, 1:47 AM CDTSpecial Marine WarningLIX58 min
Aug 5, 1:49 AM CDTSpecial Marine WarningLIX56 min
Aug 5, 3:41 AM CDTExcessive Heat WatchLIXAssumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more11 hr
Aug 5, 1:14 PM CDTSpecial Marine WarningLIX31 min
Aug 5, 1:17 PM CDTSpecial Marine WarningLIX43 min
Aug 5, 2:58 PM CDTSpecial Marine WarningLIX62 min
Aug 5, 3:48 PM CDTSpecial Marine WarningLIX57 min
Aug 5, 4:46 PM CDTSpecial Marine WarningLIX44 min
Aug 5, 5:24 PM CDTSpecial Marine WarningLIX51 min

Nearby

Heat Advisories in Louisiana, 2011Heat Advisories in Mississippi, 2011Every heat advisory in 2011

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.