Severe Thunderstorm Warning 378, NWS Jackson, MS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
246 PM CDT MON MAY 9 2005

.SHORT TERM...
AS ANTICIPATED...SCT SHRA AND TSRA HAVE ERUPTED OVER THE AREA THIS
AFTERNOON. THUS FAR...STORMS HAVE REMAINED BELOW SEVERE LIMITS AND
MOST STORMS WILL REMAIN SO FOR THE DURATION OF THE AFTERNOON. TEMPS
HAVE RISEN INTO THE UPPER 70S TO AROUND 80 MOST LOCALES...THE AREAS
AFFECTED BY RAINFALL HAVE DROPPED INTO THE UPPER 60S/LOWER 70S.

TONIGHT...SHORTWAVE TROUGH RESPONSIBLE FOR INITIATING CONVECTION
OVER THE REGION TODAY WILL CONTINUE TO SLIDE EAST THROUGH THE LOWER
MS RIVER VALLEY. WITH THE SHRA/TSRA ACTIVITY RELIANT ON SFC HEATING
FOR INSTABILITY...AND THE LACK OF AN APPRECIABLE SFC BOUNDARY...THE
COVERAGE AND INTENSITY OF EXISTING SHRA/TSRA LATE THIS AFTERNOON
SHOULD QUICKLY DECREASE AFTER SUNSET. HAVE KEPT SLIGHT CHC/LOW END
CHC IN THE EASTERN THIRD OF THE AREA THIS EVENING...OTHERWISE DRY
CONDITIONS ARE EXPECTED. LOW TEMPS OVERNIGHT SHOULD HOLD RIGHT
AROUND SEASONAL AVERAGES...NEAR 60 IN THE EAST....LOWER 60S
ELSEWHERE.

AS MENTIONED IN THE 18Z AVIATION DISCUSSION...GUIDANCE SUGGESTING
THAT LOW LEVEL MOISTURE WILL REMAIN ABUNDANT INTO THE OVERNIGHT
HOURS. PARTLY CLOUDY CONDITIONS ARE ON TAP THIS EVENING...BUT
EXPECTING A STRATUS DECK TO DEVELOP OVER A BETTER PART OF THE AREA
AFTER MIDNIGHT. LIGHT FOG IS EXPECTED ACROSS THE ENTIRE AREA BY
AFTER MIDNIGHT AS WELL (3-5SM)...HOWEVER EAST AND SOUTHEAST PORTIONS
OF THE AREA MAY SEE MORE IN THE WAY OF PATCHY DENSE FOG.
CONFIDENCE... EVEN AT THIS STAGE OF THE GAME...IS STILL A BIT LOW
BUT CLIMO SUGGESTS THAT THE NIGHT AFTER RAIN EXPECT FOG. IF STRATUS
IS SLOW TO BUILD INTO THE EAST...PATCHY DENSE FOG WILL BECOME MORE
OF A CONCERN.

TUESDAY...SHORTWAVE TROUGH AFFECTING THE AREA TODAY WILL EXIT STAGE
EAST. NVA ALONG WITH INCREASED RIDGING IN THE UPPER LEVELS WILL KEEP
THE AREA ON THE DRY SIDE. A RENEGADE STORM CANNOT BE TOTALLY RULED
OUT ALONG THE MS/AL BORDER...HOWEVER THE CHANCE DOES NOT WARRANT
RAIN BEARING POPS IN THE TEXT. THE MAIN STORY IS THAT TEMPS WILL
CLIMB 5 TO 7 DEGREES ABOVE AVERAGE. 925MB TEMPS WILL RANGE FROM 20C
EAST TO 22C WEST BY AFTERNOON WITH 850MB TEMPS AROUND 16C. THIS
TRANSLATES TO TEMPS IN THE MID/UPPER 80S ACROSS THE AREA. MOS HAS
RESPONDED TO THESE CONDITIONS NICELY AND DID NOT SWAY FAR FROM MAV
VALUES./GAGAN/

THE AIR MASS WILL BE RELATIVELY DRY WEDNESDAY AS HEALTHY UPPER
RIDGING DEVELOPS. LIGHT SOUTHERLY FLOW CONTINUES AT LOWER LEVELS BUT
FLOW EXPECTED TO BE ANTICYCLONIC IN NATURE ON THE EDGE OF A LOW
LEVEL RIDGE THAT PERSISTS JUST UPSTREAM. MODELS HAVE BEEN CONSISTENT
IN MAINTAINING A WEAK WAVE...AND ASSOCIATED MOISTURE POCKET...IN
NWLY FLOW ON THE EASTERN EDGE OF THE RIDGE. WILL LEAVE WEDNESDAY DRY
FOR NOW BUT ISOLATED CONVECTION COULD BE POSSIBLE DEPENDING ON THE
EVENTUAL EVOLUTION OF THE IMPULSE. WARM TEMPS ON TAP WEDNESDAY AND
THURSDAY DUE TO AMPLIFYING RIDGE OVER THE REGION. 850 MB TEMPS
FORECAST AROUND 16 OR 17 DEGS./03/

.LONG TERM...
THE RIDGE SHIFTS TO THE EAST BY FRIDAY AS A LONG WAVE TROUGH
APPROACHES FROM THE WEST. WILL SEE A SLIGHT INCREASE IN MEAN RH
FIELDS AND THE POTENTIAL FOR WEAK WAVES IN SWLY FLOW FOR SLIGHT
CHANCE POPS FRIDAY. ADDED SLIGHT CHANCE POPS FOR SATURDAY IN MORE
ZONAL FLOW FORECAST AS TROUGH CONTINUES ITS PUSH TO THE EAST. A WEAK
SURFACE BOUNDARY ALSO DROPS NEAR THE NW CORNER OF MS. WEAK SUPPORT
WILL BE POSSIBLE ON THE SRN FRINGES OF THE ASSOCIATED UPPER JET.
FOR NOW...BEST CHANCE FOR PRECIP APPEARS TO OCCUR SUNDAY. THE
FORECAST AREA WILL BE POSITIONED ALONG THE SRN EDGES OF THE UPPER
TROUGH... ALTHOUGH THE EURO MODEL IS A BIT SLOWER ON ITS EAST
PROGRESSION. MODELS AGREE THAT THE ASSOCIATED SURFACE BOUNDARY WILL
TRACK ACROSS THE AREA SUNDAY...ALTHOUGH ONLY REACHING CENTRAL AND
SERN ZONES BY 00Z MONDAY ON THE SLOWER MODELS. WILL LEAVE SLIGHT
CHANCE POPS IN FOR MONDAY DUE TO UNCERTAINTY OF SPEED OF THE WEEKEND
SYSTEM./03/

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       61  87  64  88 /  10  10  10  10
MERIDIAN      59  87  62  87 /  30  10  10  10

&&

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

SHORT TERM: GAGAN
LONG TERM: 03

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
336 PM CDT MON MAY 09 2005

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
102036-
ADAMS-ASHLEY-ATTALA-BOLIVAR-CARROLL-CATAHOULA-CHICOT-CHOCTAW-
CLAIBORNE-CLARKE-CLAY-CONCORDIA-COPIAH-COVINGTON-EAST CARROLL-
FORREST-FRANKLIN LA-FRANKLIN MS-GRENADA-HINDS-HOLMES-HUMPHREYS-
ISSAQUENA-JASPER-JEFFERSON-JEFFERSON DAVIS-JONES-KEMPER-LAMAR-
LAUDERDALE-LAWRENCE-LEAKE-LEFLORE-LINCOLN-LOWNDES-MADISON LA-
MADISON MS-MARION-MONTGOMERY-MOREHOUSE-NESHOBA-NEWTON-NOXUBEE-
OKTIBBEHA-RANKIN-RICHLAND-SCOTT-SHARKEY-SIMPSON-SMITH-SUNFLOWER-
TENSAS-WARREN-WASHINGTON-WEBSTER-WEST CARROLL-WINSTON-YAZOO-
336 PM CDT MON MAY 09 2005

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

.DAY ONE...TONIGHT AND TUESDAY...

...THUNDERSTORMS...
SCATTERED STRONG THUNDERSTORMS WILL PERSIST THIS LATE AFTERNOON
INTO EARLY EVENING ACROSS THE OUTLOOK AREA.

AN UPPER LEVEL DISTURBANCE MOVING TOWARD THE REGION TODAY HAS
INTERACTED WITH A WARM...MOIST AND UNSTABLE AIRMASS OVER THE
OUTLOOK AREA. AS A RESULT...SCATTERED SHOWERS AND THUNDERSTORMS
HAVE DEVELOPED.  MOST STORMS ARE EXPECTED TO REMAIN ON THE STRONG
SIDE...WITH SMALL HAIL...WIND GUSTS TO 45 MPH AND BRIEF HEAVY
DOWNPOURS OF RAIN. A FEW STORMS MAY REACH SEVERE LIMITS IN
WESTERN MISSISSIPPI...WITH LARGE HAIL BEING THE PRIMARY SEVERE
WEATHER RISK.

THIS SCATTERED SHOWER AND THUNDERSTORMS ACTIVITY WILL SHIFT TO
THE EAST BY EARLY THIS EVENING...DECREASING IN INTENSITY AND
COVERAGE JUST AFTER SUNSET.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO
OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF
SEVERE WEATHER OPERATIONS...IS NOT ANTICIPATED THROUGH NEXT
MONDAY...MAY 16TH.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
416 PM CDT MON MAY 09 2005

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

0335 PM     HAIL             7 S VICKSBURG           32.23N 90.87W
05/09/2005  0.75 INCH        WARREN             MS   EMERGENCY MNGR

            3/4 INCH HAIL REPORTED ON HIGHWAY 61 SOUTH OF VICKSBURG

&&

GARRETT