Alert archive / Alabama / Heat Advisories in 2010

Heat Advisory 7, NWS Mobile, AL

August 5, 20105 counties in Alabama; 5 counties in Mississippi

NWS Mobile, AL issued this heat advisory at Aug 5, 2010, 3:24 PM CDT for 5 counties in Alabama; 5 counties in Mississippi. It took effect at Aug 6, 2010, 12:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Aug 5, 2010, 3:24 PM CDT (20:24 UTC)
In effect from
Aug 6, 2010, 12:00 PM CDT
Expired
Aug 6, 2010, 6:00 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL

Counties Choctaw County, AL, Clarke County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 84 km from the middle of the area, began a volume at 20:25 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.4 hours before the alert went out and 187 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 2010-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2594 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 2010-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
2594 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Mobile, AL wrote its last area forecast discussion before this heat advisory went out at Aug 5, 2:30 PM CDT, 54 minutes earlier.

Area forecast discussion, Aug 5, 2:30 PM CDT, 54 minutes before
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Hazardous weather outlook, Aug 5, 5:40 AM CDT, 9 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOBILE AL
540 AM CDT THU AUG 5 2010

ALZ051>064-FLZ001>006-GMZ630-650-655-670-675-MSZ067-075-076-078-
079-061100-
CHOCTAW-WASHINGTON-CLARKE-WILCOX-MONROE-CONECUH-BUTLER-CRENSHAW-
ESCAMBIA-COVINGTON-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE-
LOWER BALDWIN-INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA-
COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-MOBILE BAY-
COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA MS OUT 20 NM-
COASTAL WATERS FROM DESTIN TO PENSACOLA FL OUT 20 NM-
WATERS FROM PENSACOLA FL TO PASCAGOULA MS FROM 20 TO 60 NM-
WATERS FROM DESTIN TO PENSACOLA FL FROM 20 TO 60 NM-WAYNE-PERRY-
GREENE-STONE-GEORGE-
540 AM CDT THU AUG 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL AND
SOUTHWEST ALABAMA...NORTHWEST FLORIDA...SOUTHEAST MISSISSIPPI AND
THE COASTAL WATERS OF ALABAMA AND NORTHWEST FLORIDA...

.DAY ONE...TODAY AND TONIGHT

EXCESSIVE HEAT WILL CONTINUE TODAY ACROSS THE REGION WITH PEAK
AFTERNOON HEAT INDEX VALUES OF 108 TO 112 DEGREES...GENERALLY NORTH
OF A LINE FROM SNOW HILL TO MONROEVILLE AND SOUTHWEST TO NEAR
WIGGINS. MAXIMUM HEAT INDEX VALUES SOUTH OF THAT LINE ARE EXPECTED
TO RANGE FROM 104 TO 108...LOWER BUT POTENTIALLY STILL DANGEROUS.
THE RISK OF HEAT RELATED ILLNESS REMAINS ELEVATED.

THUNDERSTORMS WILL DEVELOP BY MID MORNING AND TEND TO MOVE OR
DEVELOP FURTHER INLAND BY MID AFTERNOON.  THE STRONGER STORMS COULD
CONTAIN STRONG WIND GUSTS UP TO 50 MPH...BRIEF BUT HEAVY RAINS AND
FREQUENT LIGHTNING.

THE ENVIRONMENT IS FAVORABLE FOR WATERSPOUT DEVELOPMENT...MAINLY
EARLY MORNING INTO EARLY AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

LATE MORNING AND AFTERNOON HEAT INDICES RANGING FROM 102 TO 107
DEGREES IS EXPECTED EACH AFTERNOON.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE...
MAINLY MID MORNING TO LATE AFTERNOON. ANY THUNDERSTORM WILL BE
CAPABLE OF PRODUCING BRIEF STRONG WIND GUSTS...DANGEROUS
LIGHTNING...AND HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL FOR
SEVERE WEATHER IS NOT EXPECTED TO BE REQUIRED.

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 5:04 PM CDTSevere Thunderstorm WarningMOBChoctaw41 min

Nearby

Heat Advisories in Alabama, 2010Heat Advisories in Mississippi, 2010Every heat advisory in 2010

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; radar from the NEXRAD Level II archive.