Special Weather Statement, NWS Jackson, MS

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
1104 AM CDT THU JUL 19 2012

.UPDATE...
INCREASED POPS IN THE EAST DUE TO SHOWERS AND THUNDERSTORMS
CURRENTLY IN THE REGION FOR THE NEXT FEW HOURS. DECREASED TEMPS
ACROSS THE EAST DUE TO THIS ACTIVITY IN THE REGION. MORNING H500
ANALYSIS INDICATE A MID LEVEL SHORTWAVE FEATURE WHICH AIDED IN THE
DEVELOPMENT OF THE MORNING CONVECTION IN THE EAST. STILL EXPECTING
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS THIS AFTERNOON IN
THE ARKLAMISS WITH MOST OF THE STORMS IN AREAS ALONG AND WEST OF THE
INTERSTATE 55 CORRIDOR IN THE MORE DESTABILIZED REGION. A VERY SOUPY
AIRMASS WITH PWATS GREATER THAN 2 INCHES INDICATE THE POTENTIAL FOR
VERY HEAVY RAIN AT TIMES. /DC/

&&

.AVIATION...
THUNDERSTORM ACTIVITY IS BRINGING MVFR/IFR CONDITIONS TO
MEI/HBG AND EXPECT THE COVERAGE OF THUNDERSTORMS TO INCREASE AS WE
GET INTO AFTERNOON HOURS FOR THE REMAINING SITES. SOME STORMS COULD
AGAIN BE RATHER VIGOROUS...WITH THE ASSOCIATED POTENTIAL FOR LOTS OF
LIGHTNING...GUSTY WINDS AND NEARBY TURBULENCE. /15/

&&

.PREV DISCUSSION... /ISSUED 402 AM CDT THU JUL 19 2012/

SHORT TERM...TODAY THROUGH FRIDAY NIGHT...A PRETTY WET PERIOD LOOKS
ON TAP FOR THE PERIOD. FOR TODAY THE UPPER TUTT LOW OVER
GEORGIA WILL CONTINUE TO SLOWLY SHIFT TO THE WEST OVER ALABAMA AND
THIS COMBINED WITH ABUNDANT MOISTURE WITH PWATS WELL ABOVE 2.0
INCHES OVER THE ENTIRE AREA WILL ALLOW CONVECTION TO DEVELOP ONCE
AGAIN. THE MOST COVERAGE OF CONVECTIVE ACTIVITY WILL BE OVER THE
SOUTHEAST HALF OF THE REGION WITH SCATTERED COVERAGE OVER THE
NORTHWEST.

LITTLE WILL CHANGE ON FRIDAY AS ABUNDANT MOISTURE CONTINUES...BUT
THE GFS/EURO DOES INDICATE A LITTLE MORE DEFINED UPPER TROUGHING OVER
THE AREA. SPC PUTS AN AREA FROM NORTHEAST LA TO THE NORTHERN HALF OF
CENTRAL MS IN A SLIGHT RISK. EXPECT CONVECTION TO ONCE AGAIN DEVELOP
IN THE AFTERNOON AND CONTINUE INTO THE EVENING HOURS. THE BEST
COVERAGE WILL BE IN THE SOUTH. THE GFS DOES TRY TO DROP A FRONTAL
BOUNDARY INTO THE AREA LATE FRIDAY NIGHT INTO SATURDAY. EITHER WAY
THERE MAY BE LINGERING SHOWERS AND THUNDERSTORMS OVERNIGHT FRIDAY
NIGHT. THERE WILL BE ENOUGH INSTABILITY AND LAPSE RATE FOR AT LEAST
ISOLATED STRONG TO SEVERE STORMS EACH DAY...BUT THE MAIN RISK LOOKS
TO BE VERY HEAVY RAINFALL WITH THE SLOW MOVEMENT OF THE STORMS AND A
VERY MOIST ATMOSPHERE...ALONG WITH GUSTY WINDS AND SOME POSSIBLE
HAIL. HIGHS WILL BE IN THE LOWER TO MIDDLE 90S.  MADE SLIGHT
ADJUSTMENTS TO NAM GUIDANCE POPS AND MAV TEMPS./17/

LONG TERM...OVERALL...LONG TERM SHOULD BE QUIETER WEATHER WISE
WITH A WARMER/DRIER PATTERN DEVELOPING.

BEFORE THAT WARMER/DRIER PATTERN DEVELOPS...SOME OF THE AREA WILL
SEE CONTINUED DECENT TSRA CHANCES SAT. DURING THIS TIME...THE
MID/UPPER LEVEL HIGH WILL BUILD ACROSS THE CENTER OF THE COUNTRY.
OUR AREA LOOKS TO SEE A DECENT S/WV MOVE ACROSS THE CWA ALONG THE
EASTERN PERIPHERY OF THE BUILDING HIGH. THIS SHOULD COMBINE WITH A
WEAK SFC BOUNDARY NEAR THE ARE TO SUPPORT MORE STORMS. AT THIS
TIME...THE BEST COMBO OF LIFT/MOISTURE LOOK TO BE ACROSS THE SE HALF
OF THE CWA AND THAT'S WHERE THE BEST POPS WILL BE. WHILE THERE SEEMS
TO BE SOME POTENTIAL FOR STRONG/SVR STORMS...ESPECIALLY SINCE THE
S/WV FORCING THINGS LOOKS TO BE FAIRLY STOUT...I'M JUST NOT SURE
WHAT THERMO SETUP MAY BE IN PLACE AS THE AREA WILL HAVE DEALT WITH
MULTIPLE ROUNDS OF STORMS DURING PREV DAYS. DUE TO THIS...WILL LEAVE
OUT ANY MENTION OF HAZ WX AND MONITOR OVER THE NEXT FEW DAYS.

BY SUN...A LEFT OVER UPPER SHEAR AXIS LOOKS TO BE IN PLACE OVER THE
AREA IN THE WAKE OF THE PREV DAYS DISTURBANCE. THIS SHOULD SET THE
STAGE FOR MORE DIURNAL STORM ACTIVITY AND WILL FOLLOW THE 20-40%
POPS OFFERED BY GUID. TEMPS OVER THE WEEKEND WILL BE AROUND NORMAL
WHICH IS THE LOWER 90S.

FOR EARLY WEEK AND ESPECIALLY INTO THE MID/LATTER PORTION OF THE
WEEK...LOOK FOR THE STOUT MID/UPPER HIGH TO BREAK DOWN SOME AND
SHIFT POSITION. WHILE IT DOESN'T APPEAR TO BUILD STRONGLY DURING THE
WEEK...THE HIGH WILL CENTER ITSELF MORE OVER OUR REGION AND THUS
PROVIDE MORE SUBSIDENCE. THIS IS NOTED BY WARMING ALOFT IN THE
MODELS AND SHOULD REALLY HAMPER CONVECTION. WHILE THERE WILL STILL
REMAIN HIGH LOW LEVEL MOISTURE IN PLACE...ENOUGH INGREDIENTS WILL BE
THERE TO SUPPORT SLIGHT CHANCES OF PRECIP AND WILL KEEP SOME LOW END
WORDING TO COVER ANY ISO TYPE ACTIVITY THAT MAY DEVELOP. AS FOR
TEMPS...LESS CLOUDS/PRECIP WILL ALLOW FOR WARMER READINGS OVERALL.
AT THIS TIME...NO DATA IS SUPPORTING ANY REALLY HOT CONDITIONS...BUT
THE AREA SHOULD EASILY WARM INTO THE MIDDLE 90S. IF THE HIGH CAN
BUILD OR THE LOW LEVEL FLOW HAVE MORE OF A WESTERLY COMPONENT...THEN
WE MAY GET WARMER...WE STILL HAVE MANY DAYS TO WATCH THIS. /CME/

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       92  74  93  74 /  59  42  48  36
MERIDIAN      91  73  94  73 / 100  59  50  34
VICKSBURG     93  75  94  72 /  62  30  47  36
HATTIESBURG   92  74  94  74 / 100  46  64  48
NATCHEZ       92  74  92  74 /  66  29  66  31
GREENVILLE    94  76  95  75 /  50  32  42  32
GREENWOOD     93  75  95  73 /  53  43  26  29

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...NONE.
LA...NONE.
AR...NONE.
&&

DC/15/17/CME

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
428 AM CDT THU JUL 19 2012

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
200930-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-
CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-
NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER-
WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH-
SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
428 AM CDT THU JUL 19 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TODAY THROUGH FRIDAY

BRIEF STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON THROUGH
THIS EVENING AND AGAIN FRIDAY AFTERNOON. WINDS GUSTS FROM 40 TO 60
MPH AND HAIL UP TO THE SIZE OF QUARTERS WILL BE POSSIBLE IN THESE
STORMS. THE SLOW SOUTHWARD MOVEMENT WITH THE HEAVIER STORMS MAY ALSO
PRODUCE RAINFALL RATES OF 2 INCHES PER HOUR AND LOCALIZED FLOODING
PROBLEMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH WEDNESDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS IS NOT EXPECTED THROUGH NEXT WEDNESDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN.

17

MSZ039-046-191430-
NOXUBEE MS-KEMPER MS-
901 AM CDT THU JUL 19 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
901 AM CDT THU JUL 19 2012

...STRONG STORMS WEST OF MACON MOVING SOUTH...

STRONG THUNDERSTORMS CAPABLE OF PRODUCING PEA SIZE HAIL AND 40 MPH
WINDS WAS LOCATED 4 MILES SOUTHEAST OF MASHULAVILLE AT 900 AM
CDT...MOVING SOUTH AT 20 MPH.

VERY HEAVY RAINS UP TO ONE INCH ALONG WITH CLOUD TO GROUND LIGHTNING
ARE ALSO POSSIBLE WITH THIS STORM.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN NORTH CENTRAL KEMPER AND SOUTHWESTERN NOXUBEE COUNTIES
SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3281 8850 3277 8876 3313 8880 3315 8861
TIME...MOT...LOC 1400Z 349DEG 18KT 3304 8869

40

MSZ056-057-066-191605-
SMITH MS-JONES MS-JASPER MS-
939 AM CDT THU JUL 19 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
939 AM CDT THU JUL 19 2012

...CLUSTER OF STRONG STORMS WITH HEAVY DOWNPOURS FROM BAY SPRINGS
   AND STRINGER MOVING SOUTH TOWARD LAUREL...

A CLUSTER OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINS
OF 1 TO 2 INCHES AND 40 MPH WINDS WAS CENTERED 3 MILES SOUTHEAST OF
STRINGER AT 937 AM CDT...MOVING SOUTH AT 25 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING STRIKES ARE LIKELY THROUGH LATE
MORNING WITH THESE STORMS MOVING INTO THE LAUREL AREA. PONDING OF
WATER ROADS IS ALSO LIKELY.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN SOUTHWESTERN JASPER...JONES AND SOUTHEASTERN SMITH COUNTIES
SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3152 8895 3153 8926 3198 8946 3200 8909
TIME...MOT...LOC 1437Z 344DEG 20KT 3183 8922

40

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MSZ043-048>050-191925-
SCOTT MS-RANKIN MS-MADISON MS-HINDS MS-
126 PM CDT THU JUL 19 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
126 PM CDT THU JUL 19 2012

...STRONG STORMS BUILDING NEAR BARNETT RESERVOIR...

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA SIZE HAIL AND 40 TO
50 MPH WINDS WAS LOCATED 3 MILES EAST OF SHARON AT 125 PM
CDT...MOVING SOUTH AT 15 MPH INTO THE NORTH END OF ROSS BARNETT.

VERY HEAVY RAINS UP TO ONE INCH ALONG WITH CLOUD TO GROUND LIGHTNING
ARE ALSO LIKELY WITH THIS STORM. BOATERS SHOULD MOVE TO PLACE OF
SAFETY AND LET THE STORM PASS.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN EXTREME NORTHEASTERN HINDS...CENTRAL MADISON...CENTRAL
RANKIN AND EXTREME NORTHWESTERN SCOTT COUNTIES SHOULD MONITOR THIS
STORM CLOSELY.

LAT...LON 3222 8976 3224 9014 3272 9000 3273 8979
TIME...MOT...LOC 1825Z 356DEG 13KT 3264 8989

40

MSZ052-058-191945-
LAUDERDALE MS-CLARKE MS-
201 PM CDT THU JUL 19 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
201 PM CDT THU JUL 19 2012

...STRONG STORM OVER MERIDIAN MOVING SOUTH...

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA SIZE HAIL AND 40 MPH
WINDS WAS LOCATED OVER MERIDIAN AT 200 PM CDT...MOVING SOUTH AT 25
MPH.

VERY HEAVY RAINS UP TO ONE INCH ALONG WITH CLOUD TO GROUND LIGHTNING
STRIKES ARE ALSO LIKELY WITH THIS STORM. PONDING OF WATER ON ROADS
IS LIKELY.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN WESTERN CLARKE AND SOUTHWESTERN LAUDERDALE COUNTIES SHOULD
MONITOR THIS STORM CLOSELY.

LAT...LON 3193 8875 3221 8891 3246 8875 3240 8855
TIME...MOT...LOC 1900Z 021DEG 22KT 3235 8869

40