Alert archive / Mississippi / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 550, NWS Jackson, MS

October 9, 2009Jones County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Oct 9, 2009, 3:31 PM CDT for Jones County, Mississippi. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 9, 2009, 3:31 PM CDT (20:31 UTC)
Expired: Oct 9, 2009, 4:15 PM CDT
In force: 44 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Jones County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 106 km from the middle of the area, began a volume at 20:35 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

Jackson, MS (KJAN), launched 12:00Z, 8.5 hours before the alert went out and 116 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: 1673 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 12.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 9, 3:20 PM CDT, 11 minutes earlier.

Area forecast discussion, Oct 9, 3:20 PM CDT, 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
320 PM CDT FRI OCT 9 2009

.SHORT TERM...SHOWERS AND THUNDERSTORMS ARE ONGOING ACROSS THE
ARKLAMISS THIS AFTERNOON WITH THE LINE OF STORMS EXTENDING FROM NEAR
COLUMBUS TO JUST EAST OF THE JACKSON METRO AREA THEN SOUTHWEST. THE
SEVERE THREAT IS BEGINNING TO DIMINISH SOMEWHAT OVER MOST THE
AREA...BUT STRONG SHEAR AND GOOD INSTABILITY CONTINUES ALONG AND OUT
AHEAD OF THE LINE MAINLY OVER AREAS NORTH OF I-20. THE SQUALL LINE
WILL CONTINUE TO PUSH EAST OF THE AREA LATE THIS AFTERNOON...BUT THE
GFS/NAM SETS UP A DEFORMATION BAND ACROSS THE CENTRAL PORTIONS OF THE
STATE OVERNIGHT WITH 12HR QPF AMOUNTS AROUND 1.5 TO 2.5 INCHES.
CURRENTLY IT LOOKS LIKE RAINFALL RATES WILL NOT BE SUFFICIENT FOR THE
ISSUANCE OF A FLASH FLOOD WATCH...BUT THIS WILL HAVE TO CONTINUE TO
BE MONITORED BY LATER SHIFTS.

RAIN WILL BE ONGOING OVER MUCH OF THE AREA EARLY...BUT IT WILL SHIFT
TO THE SOUTHEASTERN PORTIONS OF THE AREA BY SATURDAY AFTERNOON AT
LEAST TEMPORARILY AS DRY AIR BEGINS TO MOVE IN. PWATS WILL FALL
BELOW AN INCH OVER MUCH OVER THE AREA BY LATE SATURDAY AFTERNOON.
SATURDAY WILL BE A MUCH COOLER DAY THAN TODAY WITH AFTERNOON HIGHS
AROUND 20 PLUS DEGREES COOLER AS COLD AIR ADVECTION PREVAIL OVER THE
STATE.

SATURDAY NIGHT INTO SUNDAY SHOULD BE DRY FOR THE MOST PART ACROSS
THE AREA...BUT ISOLATED TO SCATTERED SHOWERS WILL CONTINUE TO BE
POSSIBLE MAINLY SOUTH OF I-20. MOISTURE WILL ONCE AGAIN INCREASE
ACROSS THE AREA SUNDAY NIGHT AS THE WARM FRONT CHARGES BACK TO THE
NORTH. PWATS ALONG AND SOUTH OF THE FRONT WILL BE ABOVE 2 INCHES.
STUCK PRETTY CLOSE TO GUIDANCE THROUGH THE PERIOD...BUT DID RAISE
POPS ABOVE GUIDANCE TONIGHT TO 100 PERCENT OVER MUCH OF THE AREA AS
THE DEFORMATION BAND SETS UP. DID NOT MAKE ANY CHANGES TO THE
EXTENDED SO WILL ATTACH THE PREVIOUS LONG TERM DISCUSSION./15/

.PREVIOUS LONG TERM...THE ECMWF/GFS/GEFS ARE ALL IN GOOD AGREEMENT ON
RETROGRADING THE INTENSE SUBTROPICAL HIGH CENTER FROM THE WESTERN
ATLANTIC WWD INTO THE GULF OF MEXICO THIS PERIOD. AS THIS
HAPPENS...THE FRONTAL ZONE WILL RETREAT NWD AND MOISTURE/LIFT WILL
INCREASE OVER THE ARKLAMISS. WAS INITIALLY RELUCTANT TO ACCEPT THE
HIGH GFS MOS POPS FOR MON-TUES AS THE GEFS SHOWS A GOOD DEAL OF
MEMBER SPREAD IN QPF DETAILS...BUT THE ECMWF FULLY SUPPORTS IT AND
REALLY HAVE NO COMPELLING REASON TO NOT EXCEPT GFS MOS. WOULD IMAGINE
LOCALLY HEAVY RAINFALL WILL BE A POSSIBILITY GIVEN THE PRECIPITABLE
WATER FORECAST TO BE > TWO INCHES. THE FORECASTED SHEAR/INSTABILITY
LOOKS INSUFFICIENT FOR MUCH IN THE WAY OF SEVERE WEATHER RISK.

WEDNESDAY AND THURSDAY...IT IS LOOKING LESS AND LESS LIKELY THAT
COOL HIGH PRESSURE WILL MAKE A SURGE SOUTHWARD INTO THE FORECAST
AREA NEXT WEEK GIVEN THE DOMINANCE OF THE SUBTROPICAL HIGH AND
UNUSUALLY HIGH HEIGHTS OVER THE AREA...EVEN THOUGH THE 00Z GFS DOES
SHOW A GLANCING BLOW OF COOLER AIR UNDER-CUTTING THE MID/UPPER LEVEL
HIGH. THERE ARE SOME INDICATIONS THAT A STRONGER SHORTWAVE TROUGH
COULD APPROACH THE AREA LATE NEXT WEEK RESULTING ANOTHER MAJOR ROUND
OF RAINFALL AND THERE IS STILL PLENTY OF TIME TO WATCH FOR THAT. /EC/

&&

.AVIATION...STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE OVER EAST
AND SOUTHEAST MISSISSIPPI THIS AFTERNOON BEFORE SHIFTING EAST OF OUR
AREA. A LARGE AREA OF MODERATE TO HEAVY RAIN WILL CONTINUE THROUGH
TONIGHT BEFORE ENDING FROM THE NORTHWEST SATURDAY. AS A RESULT MVFR
DECKS GRADUALLY LOWERING TO IFR CONDITIONS ARE EXPECTED TO PREVAIL
TONIGHT. GUSTY SOUTH WINDS WERE STILL BEING OBSERVED THIS AFTERNOON
OVER EAST AND SOUTHEAST MISSISSIPPI AHEAD OF THE MAIN LINE OF
THUNDERSTORMS. A WIND SHIFT TO THE NORTHWEST AND LIGHTER WINDS ARE
EXPECTED OVER THE EAST AND SOUTHEAST BEHIND THE LINE OF
THUNDERSTORMS. A COLD FRONT WILL SLOWLY MOVE THROUGH THE AREA
TONIGHT AND SHOULD STALL NEAR THE COAST TOMORROW AND ADDITIONAL RAIN
AND A FEW EMBEDDED THUNDERSTORMS WILL FORM NORTH OF THE FRONT AND
AFFECT THE SOUTHERN PORTIONS OF THE AREA. IFR/MVFR CONDITIONS MAY
PREVAIL AT NEARLY ALL SITES ALL DAY ON SATURDAY. /22/

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       61  67  58  71 /  89  76  42  43
MERIDIAN      65  69  59  71 /  85  79  55  49
VICKSBURG     58  65  57  72 /  83  57  31  36
HATTIESBURG   69  72  63  72 /  74  68  54  53
NATCHEZ       61  67  58  69 /  85  72  43  49
GREENVILLE    55  64  52  71 /  61  31  15  15
GREENWOOD     56  63  55  72 /  73  43  22  18

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...LAKE WIND ADVISORY UNTIL 4 PM CDT THIS AFTERNOON FOR MSZ018-019-
     025>028-034>037-040>043-047>049-053-059.

LA...LAKE WIND ADVISORY UNTIL 4 PM CDT THIS AFTERNOON FOR LAZ007>009-
     015-016-023>026.

AR...LAKE WIND ADVISORY UNTIL 4 PM CDT THIS AFTERNOON FOR ARZ074-075.

&&

15/22

Hazardous weather outlook, Oct 9, 2:57 PM CDT, 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
257 PM CDT FRI OCT 9 2009

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>028-034>037-
040>043-047>049-053-054-059>062-102000-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WASHINGTON-HUMPHREYS-
HOLMES-ATTALA-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-WARREN-HINDS-
RANKIN-CLAIBORNE-COPIAH-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
257 PM CDT FRI OCT 9 2009

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

.DAY ONE...TONIGHT AND SATURDAY

LOCALLY HEAVY RAINFALL LEADING TO THE PONDING OF WATER ON ROADS AND
MINOR FLOODING OF POOR DRAINAGE AREAS WILL BE POSSIBLE FROM LATE THIS
AFTERNOON THROUGH TONIGHT AS HEAVY RAIN DEVELOPS ALONG AND BEHIND OF
A COLD FRONT THAT WILL BE MOVING THROUGH THE REGION.

.DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY

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 THURSDAY.

MSZ029>033-038-039-044>046-050>052-055>058-063>066-072>074-102000-
WEBSTER-CLAY-LOWNDES-CHOCTAW-OKTIBBEHA-WINSTON-NOXUBEE-LEAKE-
NESHOBA-KEMPER-SCOTT-NEWTON-LAUDERDALE-SIMPSON-SMITH-JASPER-
CLARKE-LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-
FORREST-
257 PM CDT FRI OCT 9 2009

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

.DAY ONE...TONIGHT AND SATURDAY

STRONG TO SEVERE THUNDERSTORMS WITH WIND GUSTS OF 50 TO 60 MPH WILL
BE POSSIBLE THIS AFTERNOON AND EARLY EVENING OVER PORTIONS OF EASTERN
MISSISSIPPI. A TORNADO OR TWO WILL ALSO BE POSSIBLE OVER NORTHEAST
MISSISSIPPI THIS AFTERNOON. THIS ACTIVITY WILL BE AHEAD OF AN
APPROACHING COLD FRONT THAT WILL BE MOVING THROUGH THE AREA TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY

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 HAS BEEN REQUESTED FOR THIS AFTERNOON BUT IS NOT EXPECTED
SATURDAY THROUGH NEXT THURSDAY.

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

22

In the hours before

Local storm report, Oct 9, 1:54 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
154 PM CDT FRI OCT 09 2009

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

1145 AM     TSTM WND DMG     1 S WAYSIDE             33.25N 91.03W
10/09/2009                   WASHINGTON         MS   EMERGENCY MNGR

            *** 1 FATAL *** IN THE VICINITY OF, AND ALONG, KEY ROAD
            JUST OFF OF HIGHWAY 1, APPROXIMATELY 15 MOBILE HOMES
            DAMAGED. THREE WERE DESTROYED WITH 1 FATALITY CONFIRMED.
            SEVERAL MEDIUM TO LARGE SIZE TREES KNOCKED DOWN.

&&

19

Local storm report, Oct 9, 2:04 PM CDT, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
204 PM CDT FRI OCT 09 2009

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

0137 PM     TSTM WND DMG     WINONA                  33.49N 89.73W
10/09/2009                   MONTGOMERY         MS   EMERGENCY MNGR

            NUMEROUS TREES AND POWERLINES DOWN

&&

JALLEN

Local storm report, Oct 9, 2:06 PM CDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
206 PM CDT FRI OCT 09 2009

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

0137 PM     DENSE FOG        DUCK HILL               33.63N 89.71W
10/09/2009                   MONTGOMERY         MS   EMERGENCY MNGR

            ROOF BLOWN OFF HOUSE IN DUCK HILL COMMUNITY.

&&

JALLEN

Local storm report, Oct 9, 2:12 PM CDT, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
212 PM CDT FRI OCT 09 2009

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

0119 PM     TSTM WND DMG     2 SE CARROLLTON         33.48N 89.90W
10/09/2009                   CARROLL            MS   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ACROSS HIGHWAY 35 SOUTH AND ALONG
            HIGHWAY 82 IN CARROLL COUNTY.

&&

JALLEN

Local storm report, Oct 9, 2:54 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
254 PM CDT FRI OCT 09 2009

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

1103 AM     TSTM WND DMG     2 N RAYVILLE            32.50N 91.76W
10/09/2009                   RICHLAND           LA   LAW ENFORCEMENT

            SERVERAL POWERLINES DOWN WITH SEVERAL POWER OUTAGES
            REPORTED BY RICHLAND SO

&&

JALLEN

Local storm report, Oct 9, 2:55 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSON MS
255 PM CDT FRI OCT 09 2009

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

1103 AM     TSTM WND DMG     2 N RAYVILLE            32.50N 91.76W
10/09/2009                   RICHLAND           LA   LAW ENFORCEMENT

            SEVERAL POWERLINES DOWN WITH SEVERAL POWER OUTAGES
            REPORTED BY RICHLAND SO

&&

JALLEN

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 9, 10:54 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Washington	81 min
Oct 9, 11:17 AM CDT	Tornado Warning	JAN	Bolivar	58 min
Oct 9, 11:29 AM CDT	Tornado Warning	JAN	Washington	46 min
Oct 9, 11:35 AM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Issaquena, Sharkey, Sunflower, Washington	55 min
Oct 9, 12:00 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	60 min
Oct 9, 12:03 PM CDT	Tornado Warning	JAN	Leflore, Sunflower	57 min
Oct 9, 12:06 PM CDT	Tornado Warning	JAN	Bolivar, Sunflower	37 min
Oct 9, 12:24 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Holmes, Humphreys, Leflore, Sunflower and 1 more	66 min
Oct 9, 1:11 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Carroll, Grenada, Holmes, Montgomery, Yazoo	64 min
Oct 9, 1:44 PM CDT	Tornado Warning	JAN	Grenada, Webster	21 min
Oct 9, 1:50 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Clay, Montgomery, Oktibbeha, Webster and 1 more	55 min
Oct 9, 2:16 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake, Neshoba, Winston	44 min
Oct 9, 2:39 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Noxubee, Oktibbeha, Winston	46 min
Oct 9, 2:44 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Clay, Lowndes, Oktibbeha, Webster	50 min
Oct 9, 2:57 PM CDT	Severe Thunderstorm Warning	JAN	Jasper, Smith	63 min
Oct 9, 3:10 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	41 min
Oct 9, 3:38 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes, Noxubee	25 min
Oct 9, 3:51 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale, Newton	54 min
Oct 9, 9:40 AM CDT	Severe Thunderstorm Warning	JAN	Morehouse	80 min
Oct 9, 10:22 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	68 min
Oct 9, 10:49 AM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Morehouse, West Carroll	71 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2009 Every severe thunderstorm warning in 2009

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.