Severe Thunderstorm Warning 25, NWS Mobile, AL

004 
WWUS54 KMOB 240807
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
307 AM CDT SAT APR 24 2010

ALC025-097-129-240815-
/O.CAN.KMOB.SV.W.0025.000000T0000Z-100424T0830Z/
WASHINGTON AL-CLARKE AL-MOBILE AL-
307 AM CDT SAT APR 24 2010

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MOBILE...
SOUTHEASTERN CLARKE AND SOUTHEASTERN WASHINGTON COUNTIES IS
CANCELLED...

THE STORM CONTINUES TO MOVE NORTHEAST AT AROUND 50 MPH AND HAS 
WEAKEN BELOW SEVERE LIMITS. 

LAT...LON 3175 8764 3168 8756 3156 8756 3152 8761
      3148 8756 3143 8763 3143 8766 3142 8769
      3135 8774 3137 8775 3134 8778 3132 8778
      3133 8780 3130 8780 3106 8813 3119 8827
TIME...MOT...LOC 0805Z 227DEG 45KT 3133 8795

$$

AREA FORECAST DISCUSSION...MESOSCALE UPDATE
NATIONAL WEATHER SERVICE MOBILE AL
1041 PM CDT FRI APR 23 2010

.UPDATE...PLACED THE SMALL CRAFT ADVISORY IN EFFECT AT 10 PM VS 10
AM SATURDAY FOR THE NEARSHORE AND MOBILE BAY. WINDS HAVE BEEN AROUND
20 KNOTS THIS EVENING AND EXPECT THEM TO REMAIN MOSTLY 20 KNOTS OR
MORE THROUGH THE NIGHT...WITH HIGHER GUSTS OCCASIONALLY. MADE NO
OTHER CHANGES TO GRIDS...POPS MAY BE A BIT HIGH FOR SOUTHEAST
MISSISSIPPI THIS EVENING BUT EXPECT PRECIPITATION TO MOVE INTO
SOUTHEAST MISSISSIPPI BEFORE DAYLIGHT. /11

.AVIATION UPDATE FOR 24/06Z TAFS...ISOLATED SHOWERS AND
THUNDERSTORMS WILL BEGIN TO INCREASE LATE TONIGHT OR EARLY MORNING.
CONDITIONS OVERNIGHT ARE EXPECTED TO BE GENERALLY MVFR...AT 10 PM A
FEW PLACES WERE IFR DUR TO CIGS BUT EXPECT SOME IMPROVEMENT THOSE
AREAS WITHIN A FEW HOURS. EASTERN SECTIONS GZH...79J...0J4 WERE
STILL VFR BUT EXPECT MVFR IN GIG/VSBY BEFORE LONG. SATURDAY STILL
LOOKS LIKE AN ACTIVE DAY WITH SCATTERED TO NUMEROUS
THUNDERSTORMS...SOME SEVERE WITH LIFR NEAR THE STRONGER STORMS ALONG
WITH SEVERE TURBULENCE WITHIN 15 MILES OF ANY STRONG STORM. COLD
FRONT EXPECTED TO BRING AN END FORM THE WEST BY SATURDAY EVENING.
/11

                         PREVIOUS DISCUSSION

.SHORT TERM (TONIGHT THROUGH
SATURDAY NIGHT)...A STRONG SYSTEM OVER THE CENTRAL PLAINS MOVES
STEADILY OFF TO THE NORTHEAST THROUGH SATURDAY WHILE INCREASING DEEP
LAYER SOUTHWEST FLOW OVER THE AREA USHERS ABUNDANT GULF MOISTURE
INTO THE REGION WITH PRECIPITABLE WATER VALUES RISING TO AROUND TWO
INCHES.  A SHARP UPPER RIDGE CURRENTLY OVER THE EASTERN U.S.
GRADUALLY SHIFTS EASTWARD THROUGH SATURDAY WITH SUBSIDENCE REDUCING
INSTABILITY OVER THE EASTERN PORTION OF THE AREA...THEN EVENTUALLY
MOVING SUFFICIENT EAST FOR A LINE OF CONVECTION TO SWEEP ACROSS THE
AREA AHEAD OF A COLD FRONT.  A SERIES OF PROGRESSIVELY STRONGER
SHORTWAVES MOVE ACROSS THE REGION THROUGH TONIGHT INTO SATURDAY
MORNING IN THE SOUTHWEST FLOW ALOFT WHILE A 120+ UPPER JET NOSES
INTO THE AREA FROM THE SOUTHERN PLAINS CREATING PERIODS OF ENHANCED
UPPER LEVEL DIVERGENCE.  SCATTERED CONVECTION HAS ALREADY DEVELOPED
UPSTREAM ASSOCIATED WITH THESE FEATURES.  THIS CONVECTION MAY
DIMINISH WITH THE LACK OF DAYTIME HEATING AND TIMING OF
SHORTWAVES...THEN INCREASE AGAIN LATER TONIGHT MAINLY OVER THE
WESTERN PORTION OF THE AREA.  A STRONG SHORTWAVE MEANWHILE ROTATES
THROUGH THE BASE OF THE PLAINS UPPER TROF AND MOVES A SECONDARY
SURFACE LOW FROM SOUTHERN TEXAS NORTHEASTWARD INTO INDIANA BY
SATURDAY NIGHT.  WILL HAVE VERY HIGH POPS ACROSS THE AREA FOR
CONVECTION SHIFTING EASTWARD ACROSS THE AREA FROM THE MORNING
CONVECTION OVER THE WESTERN PORTION...THEN EXPECT A LINE OF
CONVECTION TO TO HAVE ORGANIZED ALONG THE APPROACHING FRONT AND MOVE
INTO THE NORTHWESTERN PORTION OF THE FORECAST AREA EARLY SATURDAY
AFTERNOON...MOVE TO ALONG THE I-65 CORRIDOR BY LATE AFTERNOON THEN
DECELERATE AND LATE EXIT THE EASTERN PORTION OF THE AREA SATURDAY
NIGHT INTO EARLY SUNDAY MORNING.  MODEL SOUNDINGS AND 18Z SOUNDINGS
SHOW A DRAMATIC TRANSITION UNDERWAY WHICH WILL CONTINUE OVERNIGHT
RESULTING IN A VERY MOIST PROFILE FROM THE SURFACE THROUGH 750 MB
WITH STEEP LAPSE RATES ALOFT.  THIS IS MAINLY OVER THE WESTERN
PORTION OF THE AREA WITH SOMEWHAT LESS FAVORABLE LAPSE RATES FURTHER
EAST DUE TO LINGERING SUBSIDENCE FROM THE UPPER RIDGE.  BOTH THE GFS
AND NAM HAVE MLCAPES INCREASING TO 700-1200 J/KG OVER THE WESTERN
THIRD OF THE AREA BY 12Z SATURDAY THEN MLCAPES AROUND 1500 J/KG OVER
THE NORTHWESTERN PORTION OF THE AREA TAPERING TO 600-800 J/KG OVER
THE FAR EASTERN COUNTIES FOR SATURDAY AFTERNOON AND GENERALLY IN THE
700-1000 J/KG RANGE SATURDAY NIGHT AS THE LINE OF CONVECTION WORKS
SLOWLY EASTWARD THROUGH THE REMAINDER OF THE AREA.  0-1 KM
HELICITIES INCREASE TO 150-250 M2/S2 WITH HODOGRAPHS SHOWING AN
INCREASINGLY CURVED PROFILE OVER THE NORTHWESTERNMOST COUNTIES WHICH
CONTINUES THROUGH 12Z SATURDAY.  HELICITIES THEN INCREASE TO VERY
HIGH VALUES OF 300-450 M2/S2 OVER THE NORTHERN PORTION OF THE AREA
WITH 200-300 OVER THE SOUTHERN PORTION WHILE HODOGRAPHS BECOME MORE
STRAIGHT LINE.  THE ENVIRONMENT WILL PROMOTE SEVERE STORMS WITH
DAMAGING WINDS AND LARGE HAIL AND ROTATING STORMS WITH THE HIGHEST
RISK OF TORNADOES...SOME LONG TRACK AND VERY STRONG...MORE SO
GENERALLY NORTH OF A LINE FROM WIGGINS TO MONROEVILLE TO
GREENVILLE...OR GENERALLY WEST OF I-65 AND SLIGHTLY INLAND WHERE THE
HIGHEST HELICITIES WILL BE CO-LOCATED WITH FAIRLY HIGH CAPES AND
ALSO WHERE SPC HAS A MODERATE RISK.  PERIODS OF HEAVY RAIN AND
LOCALIZED NUSIANCE FLOODING MAY BE POSSIBLE WITH ANY TRAINING
THUNDERSTORMS...BUT NOT SUFFICIENT FOR A FLASH FLOOD WATCH.  THE
PRESSURE GRADIENT IS SUFFICIENT TO PRODUCE SUSTAINED WINDS OF 20-23
KNOTS WITH FREQUENT GUSTS UP TO THE LOWER THIRTIES IN THE LATE
MORNING THROUGH MID AFTERNOON MAINLY WEST OF INTERSTATE 65 ON
SATURDAY AND HAVE ISSUED A WIND ADVISORY FOR THIS AREA.  HAD TO ADD
SMALL POPS FOR THE EASTERN PORTION OF THE FORECAST AREA FOR SUNDAY
MORNING FOR LINGERING CONVECTION ALONG THE WEAKENING AND SLOWING
FRONTAL BOUNDARY...THEN DRY CONDITIONS FOLLOW THROUGH MONDAY NIGHT.
TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL SATURDAY DUE TO
CONVECTION AND CLOUD COVER...THEN SLIGHTLY ABOVE NORMAL SUNDAY AND
MONDAY WITH NIGHTS BECOMING SEASONABLE. /29

&&

.LONG TERM (TUESDAY THROUGH FRIDAY)...DRY CONDITIONS FOLLOW FOR THE
EXTENDED PERIOD AS A SHARPLY AMPLIFIED UPPER RIDGE BUILDS IN FROM
THE PLAINS AND MOVES ACROSS THE EASTERN STATES WITH A SURFACE HIGH
SHIFTING ACROSS THE REGION AND MOVING INTO THE WESTERN ATLANTIC.
COOL TEMPERATURES ON TUESDAY GRADUALLY MODERATE TO SEASONABLE
TEMPERATURES BY FRIDAY. /29

&&

.FIRE...WINDY CONDITIONS ON SATURDAY WILL CREATE VERY HIGH
DISPERSIONS.  RAIN CHANCES INCREASE TONIGHT WITH PERIODS OF SHOWERS
AND THUNDERSTORMS FOR SATURDAY THEN RAIN CHANCES TAPER OFF THROUGH
SUNDAY MORNING.  AFTERNOON RELATIVE HUMIDITIES WILL REMAIN ABOVE
CRITICAL LEVELS THROUGH SUNDAY. /29

&&

.PRELIMINARY POINT TEMPS/POPS...
MOBILE      69  78  64  83 /  50  80  50  10
PENSACOLA   69  78  68  82 /  40  70  60  20
DESTIN      68  77  69  78 /  20  70  70  30
EVERGREEN   68  80  67  85 /  30  90  60  20
WAYNESBORO  66  81  58  82 /  70 100  30  10
CAMDEN      66  80  66  84 /  50 100  60  10
CRESTVIEW   65  81  66  84 /  20  70  70  30

&&

.MOB WATCHES/WARNINGS/ADVISORIES...
AL...WIND ADVISORY FROM 9 AM SATURDAY TO 6 PM SATURDAY FOR THE
     FOLLOWING ZONES: BUTLER...CHOCTAW...CLARKE...CONECUH...
     COVINGTON...CRENSHAW...ESCAMBIA...LOWER BALDWIN...LOWER
     MOBILE...MONROE...UPPER BALDWIN...UPPER MOBILE...
     WASHINGTON...AND WILCOX.

FL...WIND ADVISORY FROM 9 AM SATURDAY TO 6 PM SATURDAY FOR THE
     FOLLOWING ZONES: COASTAL ESCAMBIA...COASTAL OKALOOSA...
     COASTAL SANTA ROSA...INLAND ESCAMBIA...INLAND OKALOOSA...
     AND INLAND SANTA ROSA.

MS...WIND ADVISORY FROM 9 AM SATURDAY TO 6 PM SATURDAY FOR THE
     FOLLOWING ZONES: GEORGE...GREENE...PERRY...STONE...AND
     WAYNE.

GM...SMALL CRAFT ADVISORY FROM 10 AM SATURDAY TO 5 AM SUNDAY FOR THE
     FOLLOWING ZONES: COASTAL WATERS FROM DESTIN TO PENSACOLA FL
     OUT 20 NM...COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA
     MS OUT 20 NM...AND MOBILE BAY.

     SMALL CRAFT ADVISORY FROM 10 PM TONIGHT TO 5 AM SUNDAY FOR THE
     FOLLOWING ZONES: WATERS FROM DESTIN TO PASCAGOULA MS OUT
     60 NM...AND MOBILE BAY.

&&

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MOBILE AL
430 PM CDT FRI APR 23 2010

ALZ051>064-FLZ001>006-GMZ630-650-655-670-675-MSZ067-075-076-078-
079-242130-
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-
430 PM CDT FRI APR 23 2010

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

.DAY ONE...TONIGHT AND SATURDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA
THROUGH THE OVERNIGHT HOURS. A FEW OF THESE MAY BE SEVERE WITH
DAMAGING WINDS...LARGE HAIL AND ISOLATED TORNADOES. HOWEVER...THE
GREATEST SEVERE WEATHER THREAT WILL COME DURING THE DAY ON SATURDAY.

THERE IS A MODERATE RISK OF SEVERE WEATHER ACROSS NORTHWEST PORTIONS
OF FORECAST AREA FROM WAYNE COUNTY MISSISSIPPI NORTHEAST TO WILCOX
COUNTY ALABAMA. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TO
THE SOUTH AND EAST OF THAT LINE. THUNDERSTORMS IN THE MODERATE RISK
AREA WILL HAVE THE GREATEST PROBABILITY OF PRODUCING STRONG
TORNADOES IN ADDITION TO LARGE HAIL AND DAMAGING WINDS. ACROSS THE
SLIGHT RISK AREA...LARGE HAIL...DAMAGING WINDS AND ISOLATED
TORNADOES WILL BE POSSIBLE.

INITIALLY...IT IS ANTICIPATED THUNDERSTORMS WILL BE MORE ISOLATED
DURING THE FIRST HALF OF THE DAY WEST OF I-65. THUNDERSTORMS WILL
THEN MERGE INTO A SOLID LINE EVENTUALLY MOVING OUT OF SOUTHEASTERN
MISSISSIPPI BY EARLY TO MID AFTERNOON...TO NEAR I-65 STRETCHING TO
THE COAST BETWEEN MID AND LATE AFTERNOON AND THEN EXITING FURTHER
EASTWARD TO A BUTLER COUNTY ALABAMA TO OKALOOSA COUNTY FLORIDA LINE
BY MID EVENING. A THREAT OF FLASH FLOODING ALSO EXISTS LOCALLY AS
SUPERCELLS CAN PRODUCE TORRENTIAL RAINFALL ON TIME SCALES LESS THAN
ONE HOUR...AND ESPECIALLY...WHEN ONE SUPERCELL FOLLOWS SO CLOSELY
BEHIND ANOTHER.

A WIND ADVISORY IS IN EFFECT FOR THE AREA ON SATURDAY DUE TO SUSTAINED
WINDS AROUND 25 MPH WITH FREQUENT GUSTS TO AROUND 35 MPH.

OVER THE MARINE AREA...A SMALL CRAFT ADVISORY IS IN EFFECT FROM 20
TO 60 MILES OUT BEGINNING THIS EVENING CONTINUING THROUGH SUNDAY
MORNING AND OUT TO 20 NM INCLUDING INLAND BAYS AND SOUNDS FROM
SATURDAY MORNING THROUGH SUNDAY MORNING. SOUTH WINDS 20 TO 25 KNOTS
WITH HIGHER GUSTS CAN BE EXPECTED WITH SEAS BUILDING TO 9 FEET BY
SATURDAY AFTERNOON. A MODERATE TO STRONG WESTERLY FLOW CAN ALSO BE
EXPECTED BEGINNING SUNDAY MORNING CONTINUING THROUGH MONDAY
AFTERNOON.

A MODERATE RISK OF RIP CURRENTS CONTINUES THROUGH SUNDAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF SEVERE STORM SPOTTERS AND EMERGENCY MANAGEMENT
OFFICIALS FOR SEVERE WEATHER OPERATIONS WILL LIKELY BE REQUIRED
SATURDAY.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
224 AM CDT SAT APR 24 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0221 AM     HAIL             1 SE LUCEDALE           30.91N 88.58W
04/24/2010  E0.75 INCH       GEORGE             MS   PUBLIC

            DIME SIZE HAIL REPORTED ON HIGHWAY 163 NEAR LUCEDALE

&&

KC