Alert archive / Mississippi / Tornado Watches in 2005

Tornado Watch 752

August 28, 20054 states

The Storm Prediction Center issued this tornado watch at Aug 28, 2005, 4:40 PM CDT for 4 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Aug 28, 2005, 4:40 PM CDT (21:40 UTC)
Expired: Aug 29, 2005, 1:55 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center

All 38 counties

Baldwin County, AL, Butler County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 75 km from the middle of the area, began a volume at 21:40 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.

Warnings issued inside it

5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Aug 28, 6:51 PM CDT	Tornado Warning	MOB	Baldwin, Mobile	24 min
Aug 28, 7:16 PM CDT	Tornado Warning	MOB	Baldwin, Mobile	24 min
Aug 28, 9:27 PM CDT	Tornado Warning	MOB	Okaloosa	12 min
Aug 28, 10:14 PM CDT	Tornado Warning	LIX	Orleans, Saint Bernard	57 min
Aug 28, 11:22 PM CDT	Tornado Warning	LIX	Plaquemines	23 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.7 hours before the alert went out and 79 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 529 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 282142
SEL2  
SPC WW 282142
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-290700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 752
NWS STORM PREDICTION CENTER NORMAN OK
440 PM CDT SUN AUG 28 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHWEST ALABAMA
       WESTERN FLORIDA PANHANDLE
       SOUTHEAST LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS SUNDAY AFTERNOON AND MONDAY MORNING FROM 440 PM
UNTIL 200 AM CDT.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF NEW
ORLEANS LOUISIANA TO 10 MILES EAST SOUTHEAST OF CRESTVIEW FLORIDA.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 750...WW 751...

DISCUSSION...OUTER BANDS OF HURRICANE KATRINA ARE SPREADING INLAND
ACROSS THE CENTRAL GULF COAST. LOW LEVEL VERTICAL SHEAR PROFILES
ARE FORECAST TO STRENGTHEN THROUGH THE EVENING AS SYSTEM
APPROACHES...POSING THE RISK OF ISOLATED TORNADOES.  THE FORECAST
MAXIMUM WIND GUSTS AND MEAN CELL MOTION APPLY TO SEVERE
THUNDERSTORMS OUTSIDE THE HURRICANE EYEWALL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 13035.


...HART

312,0904 315,0862 292,0862 285,0904

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 28, 4:03 PM CDT	Mesoscale Discussion	SPC	Baldwin, Mobile	57 min
Aug 28, 6:32 PM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Clarke, Conecuh, Covington, Escambia and 3 more	88 min

Nearby

Tornado Watches in Mississippi, 2005 Tornado Watches in Louisiana, 2005 Tornado Watches in Alabama, 2005 Every tornado watch in 2005

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.