Alert archive / Mississippi / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 468, NWS Jackson, MS

June 11, 2003Grenada County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 11, 2003, 6:56 PM CDT for Grenada 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 outline as issued.

The facts

Issued: Jun 11, 2003, 6:56 PM CDT (23:56 UTC)
Expired: Jun 11, 2003, 7:40 PM CDT
In force: 44 min
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

County Grenada County, MS

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 11, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.9 hours before the alert went out and 115 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: 67 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

313 
WUUS54 KJAN 112356
SVRJAN
MSC043-120040-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
655 PM CDT WED JUN 11 2003

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRENADA COUNTY IN NORTH CENTRAL MISSISSIPPI

* UNTIL 740 PM CDT

* AT 655 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHEAST OF GORE SPRINGS...OR ABOUT 14
  MILES EAST OF GRENADA...MOVING EAST AT 70 MPH.

DAMAGING WINDS CAN BE EXPECTED. GO TO A SAFE PLACE NOW AND REMAIN
PROTECTED UNTIL THE STORM HAS PASSED.

LAT...LON 3389 8990 3371 8993 3369 8950 3386 8953

$$

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 Jun 11, 3:40 PM CDT, 3 hours 16 minutes earlier.

Area forecast discussion, Jun 11, 3:40 PM CDT, 3 hours 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
230 CDT WED JUN 10 2003

WEAK SHORTWAVE RIDGING FORECAST EARLY TONIGHT IN THE WAKE OF TODAYS
TROUGH. MODELS AGREE THAT ANOTHER MCS WILL DEVELOP OVERNIGHT
UPSTREAM BUT DISAGREE ON THE LOCATION. WILL LEAN TOWARD THE AVN
SOLUTION WHICH MAINTAINS SYSTEM FARTHER WEST THRU DAYBREAK BUT WILL
KEEP CHANCE POPS WRN ZONES FOR THU MORNING.

COLD FRONT REMAINING N OF REGION UNTIL THE WEEKEND BUT OUTFLOW
BOUNDARIES WILL LINGER TO FOCUS CONVECTION. SHORTWAVE TRACK PERSISTS
ACROSS THE REGION AND UPPER DIVERGENCE INCREASES THU AS THE UPPER
JET NOSES INTO SW MS. ALTHOUGH SHORTWAVE STRENGTH LOOKS WEAKER
TOMORROW AND 850 MB FLOW TO BE LIGHTER...INSTABILITY WILL BE
SUFFICIENT IN OUR REGION OF DEWPOINTS IN THE LOW TO MID 70S FOR AT
LEAST HIGH END CHANCE POPS MOST LOCATIONS. MOST CONCERNED ABOUT
POSSIBILITY OF ISOLATED SEVERE STORMS CENTRAL AND SRN ZONES...WHERE
UPPER DIVERGENCE LOOK STRONGER AND SHORTWAVE MOVES THRU. HOWEVER...
INSTABILITY LOOKS GREATEST NRN ZONES WHERE HIGH THETAE AND CAPE MAX
SITS NEAR THE MS/TN BORDER. CHANCE LOOKS SMALLER NRN ZONES AT THIS
TIME BUT WILL BROAD BRUSH ISOLATED SEVERE POSSIBILITY ALL ZONES FOR
THU.

WILL MAINTAIN CHANCE FOR CONVECTION THU NIGHT AS THE NEXT SHORTWAVE
SHIFTS INTO THE AREA. AVN INCREASES STRENGTH OF VORT LOBE AFTER
MIDNIGHT WHICH SUGGESTS POSSIBILITY OF MCS DEVELOPMENT LATE.
OTHER FEATURES NO NOT OFFER MUCH SUPPORT TO THIS AT THIS TIME SO
WILL GO WITH DECREASE IN COVERAGE AND INTENSITY OF CONVECTION THU
NIGHT BUT MAINTAIN CHANCE OF SHOWERS AND THUNDERSTORMS.

AIR MASS REMAINS UNSTABLE FRIDAY WITH SURFACE DEWPOINTS IN THE 70S.
VERTICAL VELOCITY AND UPPER DIVERGENCE VALUES INCREASE IN THE
AFTERNOON AS YET ANOTHER SHORTWAVE TRACKS ACROSS THE AREA...WHICH
MEANS A GOOD CHANCE OF THUNDERSTORMS AGAIN FOR FRIDAY. WILL KEEP
CHANCE FOR THUNDERSTORMS FRIDAY NIGHT. SRN TIP OF GOOD DYNAMICS
SWINGS ACROSS NW MS OVERNIGHT AS THE SURFACE BOUNDARY DRIFTS INTO NW
AR. WILL LEAVE KEEP ISOLATED CONVECTION OTHER ZONES...MAINLY IN THE
EVENING HOURS.

GOOD DIVERGENT PATTERN SETTING UP ALOFT AS THE UPPER LOW SETTLES
INTO THE MIDWEST THIS WEEKEND. CHANCE OF THUNDERSTORMS FOR SATURDAY
AS THE TROUGH DEEPENS JUST UPSTREAM. GOOD THUNDERSTORM CHANCE WILL
CONTINUE SATURDAY NIGHT...INCREASING SUNDAY AS THE SURFACE FRONTAL
BOUNDARY FINALLY SAGS INTO NW MS. THE 12Z GFS DRAGS THE BOUNDARY
SWD ACROSS THE FORECAST AREA SUNDAY WHILE THE 00Z RUN MAINTAINS THE
BOUNDARY ALONG OF N OF NRN SECTIONS OF THE FORECAST AREA THROUGH
WED. UPPER LOW NOW MAINTAINED JUST W OF THE MS RIVER THRU WED SO
WILL KEEP THUNDERSTORM CHANCE IN THROUGH EXTENDED FORECAST PERIODS.

.JAN...
AR...NONE.
LA...NONE.
MS...NONE.

Hazardous weather outlook, Jun 11, 6:50 PM CDT, 6 minutes before

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
122350-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
650 PM CDT WED JUN 11 2003

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

.DAY ONE...TONIGHT AND THURSDAY...

...THUNDERSTORMS...
THUNDERSTORMS WILL BE POSSIBLE ACROSS THE ENTIRE AREA TONIGHT
THROUGH THURSDAY. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE
THIS EVENING AND AGAIN ON THURSDAY. DAMAGING WINDS FROM 60 TO 70
MPH...BRIEF HEAVY RAIN AND DANGEROUS LIGHTNING WILL BE POSSIBLE.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS EVENING MAINLY
NORTH OF INTERSTATE 20. SEVERAL BOUNDARIES FORMED AHEAD OF A
STRONG LOW PRESSURE SYSTEM MOVING ACROSS THE MIDWEST...CAUSING
MANY THUNDERSTORMS TO DEVELOP THIS AFTERNOON. AFTERNOON
HEATING...MOISTURE AND OLD BOUNDARIES WILL LEAD TO MORE
THUNDERSTORMS THROUGH THE EVENING...WHERE A FEW STORMS MAY BECOME
SEVERE.

SEVERAL UPPER LEVEL DISTURBANCES WILL MOVE INTO THE AREA FROM THE
WEST EARLY THURSDAY. SOUTHERLY FLOW CONTINUES TO BRING
WARM...MOIST AND UNSTABLE AIR INTO THE REGION. THE COMBINATION OF
MOISTURE...INSTABILITY AND UPPER LEVEL DISTURBANCES WILL BRING
SCATTERED THUNDERSTORMS TO THE AREA BY THURSDAY AFTERNOON...WHERE
A FEW STORMS MAY BECOME SEVERE.

...FLOODING...
COMPLEXES OF THUNDERSTORMS LATE THIS AFTERNOON COULD PERSIST WELL
INTO THE NIGHT AS THEY MOVE EASTWARD ACROSS THE AREA...MAINLY
NORTH OF HIGHWAY 82.  PERIODS OF HEAVY RAINFALL COULD PRODUCE ONE
TO TWO INCHES CAUSING PONDING OF WATER ON ROADWAYS AND IN POOR
DRAINAGE AREAS.

WEAK UPPER LEVEL DISTURBANCES WILL INTERACT WITH A TROPICAL
AIRMASS TO PRODUCE THE HEAVY RAINS. ADDITIONAL OUTFLOW BOUNDARIES
COULD ALSO FOCUS THE THUNDERSTORMS AGAIN THURSDAY AFTERNOON.

.DAYS TWO THROUGH SEVEN...THURSDAY NIGHT THROUGH WEDNESDAY...

...DAYS TWO AND THREE...THURSDAY NIGHT THROUGH SATURDAY...
SCATTERED THUNDERSTORMS CAN BE EXPECTED THURSDAY NIGHT THROUGH
SATURDAY. THE ATMOSPHERE WILL REMAIN VERY MOIST AND UNSTABLE.
WITH SEVERAL UPPER LEVEL DISTURBANCES MOVING ACROSS THE
REGION...STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS
THE ENTIRE AREA...MAINLY DURING THE AFTERNOONS AND EVENINGS.

...DAYS FOUR THROUGH SEVEN...SATURDAY NIGHT THROUGH WEDNESDAY...
AN ACTIVE WEATHER PATTERN WILL CONTINUE THIS WEEKEND THROUGH
EARLY NEXT WEEK. STRONG THUNDERSTORMS WILL BE POSSIBLE OVER THE
ENTIRE OUTLOOK AREA SATURDAY THROUGH WEDNESDAY. AN LOW PRESSURE
SYSTEM WILL SETTLE  OVER THE ARKLATEX REGION AROUND SUNDAY.
SOUTHERLY WINDS WILL INCREASE AHEAD OF THE SYSTEM AND PROVIDE A
STEADY FLOW OF VERY MOIST AND UNSTABLE AIR INTO THE LOWER
MISSISSIPPI RIVER VALLEY. THE UPPER LEVEL SYSTEM WILL REMAIN OVER
THE AREA THROUGH WEDNESDAY...KEEPING A CHANCE OF STRONG
THUNDERSTORMS THROUGH MID WEEK.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER
OPERATIONS...MAY BE NEEDED THROUGH TONIGHT AND AGAIN ON THURSDAY.

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

In the hours before

Local storm report, Jun 11, 2:23 PM CDT, 4 hours 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
223 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1155 PM    STONEWALL                 MS   60 MPH WIND GUST
06/11/03   CLARKE                         PUBLIC REPORT.

Local storm report, Jun 11, 3:29 PM CDT, 3 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
329 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0300 PM    HARRISONBURG              LA   WIND DAMAGE
06/11/03   CATAHOULA                      LARGE LIMBS DOWN.
                                          REPORTED BY POLICE.

Local storm report, Jun 11, 4:05 PM CDT, 2 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
405 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    PARCHMAN                  MS   60 MPH WIND GUST
06/11/03   SUNFLOWER                      REPORTED BY NATIONAL
                                          WEATHER SERVICE STORM
                                          SPOTTER.

Local storm report, Jun 11, 4:51 PM CDT, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
451 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0445 PM    MANTEE                    MS   WIND DAMAGE
06/11/03   WEBSTER                        A FEW TREES DOWN. PUBLIC
                                          REPORT

Local storm report, Jun 11, 6:46 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
646 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0630 PM    2 W HARDY                 MS   0.75 INCH HAIL
06/11/03   GRENADA                        PUBLIC REPORT NEAR I-55.

Local storm report, Jun 11, 6:53 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
653 PM CDT WED JUN 11 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0649 PM    SHELBY                    MS   WIND DAMAGE
06/11/03   BOLIVAR                        TWO TREES DOWN. REPORTED
                                          BY POLICE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 10:25 AM CDT	Severe Thunderstorm Warning	JAN	Simpson	25 min
Jun 11, 10:36 AM CDT	Severe Thunderstorm Warning	JAN	Smith	44 min
Jun 11, 10:53 AM CDT	Severe Thunderstorm Warning	JAN	Rankin	22 min
Jun 11, 11:01 AM CDT	Severe Thunderstorm Warning	JAN	Jasper	59 min
Jun 11, 11:31 AM CDT	Severe Thunderstorm Warning	JAN	Carroll	39 min
Jun 11, 11:40 AM CDT	Severe Thunderstorm Warning	JAN	Newton	30 min
Jun 11, 11:45 AM CDT	Severe Thunderstorm Warning	JAN	Clarke, Lauderdale	60 min
Jun 11, 11:50 AM CDT	Severe Thunderstorm Warning	JAN	Montgomery	30 min
Jun 11, 12:02 PM CDT	Severe Thunderstorm Warning	JAN	Webster	28 min
Jun 11, 12:04 PM CDT	Severe Thunderstorm Warning	JAN	Webster	26 min
Jun 11, 12:15 PM CDT	Severe Thunderstorm Warning	JAN	Kemper	40 min
Jun 11, 12:34 PM CDT	Severe Thunderstorm Warning	JAN	Clay	61 min
Jun 11, 12:37 PM CDT	Severe Thunderstorm Warning	JAN	Clay	58 min
Jun 11, 12:44 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes, Oktibbeha	61 min
Jun 11, 3:21 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	44 min
Jun 11, 3:54 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	26 min
Jun 11, 4:31 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Webster	44 min
Jun 11, 5:26 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	64 min
Jun 11, 5:53 PM CDT	Severe Thunderstorm Warning	JAN	Grenada	62 min
Jun 11, 6:18 PM CDT	Flash Flood Warning	JAN	Bolivar	3 hr
Jun 11, 6:33 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	52 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2003 Every severe thunderstorm warning in 2003

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.