Alert archive / Mississippi / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 271, NWS Jackson, MS

July 7, 2002Claiborne County, Jefferson County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 7, 2002, 7:54 PM CDT for Claiborne County, Jefferson County, Mississippi. It was in force for 46 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: Jul 7, 2002, 7:54 PM CDT (00:54 UTC)
Expired: Jul 7, 2002, 8:40 PM CDT
In force: 46 min
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

Counties Claiborne County, MS, Jefferson 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 nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.9 hours before the alert went out and 100 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: 4526 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1442 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

610 
WUUS54 KJAN 080054
SVRJAN
MSC021-063-080140-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
753 PM CDT SUN JUL 7 2002

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAIBORNE COUNTY IN SOUTHWEST MISSISSIPPI
  JEFFERSON COUNTY IN SOUTHWEST MISSISSIPPI

* UNTIL 840 PM CDT

* AT 753 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER JEFFERSON COUNTY...OR ABOUT 29 MILES WEST
  OF HAZLEHURST...MOVING SOUTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL...
  REMAIN OVER RURAL JEFFERSON COUNTY 
REMAIN OVER RURAL CLAIBORNE COUNTY 

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

WINDS UP TO 60 MPH ARE LIKELY WITH THIS STORM.

HAIL TO THE SIZE OF DIMES IS LIKELY WITH THIS STORM.

LAT...LON 3175 9077 3193 9078 3192 9120 3170 9126

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 Jul 7, 2:55 PM CDT, 4 hours 59 minutes earlier.

Area forecast discussion, Jul 7, 2:55 PM CDT, 4 hours 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
255 PM CDT SUN JUL 7 2002

THE MAIN FORECAST PROBLEM TODAY CONTINUES TO BE COVERAGE OF
CONVECTION OVER THE NEXT FEW DAYS.

A VERY WARM AND HUMID AIRMASS WILL REMAIN IN PLACE OVER THE LOWER
MISSISSIPPI VALLEY THROUGH WEDNESDAY WITH ISOLATED TO SCATTERED
MAINLY AFTERNOON AND EVENING THUNDERSTORMS CONTINUING THROUGH THE
SHORT TERM PERIOD.  A SLOWLY DEVELOPING TROPICAL LOW PRESSURE SYSTEM
IN THE CENTRAL GULF OF MEXICO COULD AFFECT THE RAIN CHANCES BY
WEDNESDAY AND MAY ACTUALLY REDUCE RAIN CHANCES IN THE FORECAST AREA
BY MID WEEK AS THE LOW LEVEL CIRCULATION INCREASES AROUND THE SYSTEM
WELL TO THE SOUTH OF THE MISSISSIPPI COAST. HOWEVER...THERE IS STILL
TOO MUCH UNCERTAINTY IN THE DEVELOPMENT OF THIS SYSTEM TO TRY TO
FACTOR IT INTO THE LOCAL FORECAST AT THIS TIME. WILL KEEP ISOLATED
TO SCATTERED THUNDERSTORMS IN THE FORECAST FOR MAINLY AFTERNOON AND
EARLY EVENING CONVECTIVE ACTIVITY. WITH THIS NORTHWESTERLY 500 MB
FLOW REGIME...EXPECT SOME DRIER MID LEVEL AIR TO ENHANCE THE
POTENTIAL FOR STRONG DOWNBURST WINDS FROM SOME OF THE STRONGER
AFTERNOON THUNDERSTORMS DURING THE PERIOD.

FOR TEMPERATURES...NO RELIEF TO THE HEAT IN SIGHT THROUGH THE SHORT
TERM. EXPECT VERY HUMID CONDITIONS TO CONTINUE WITH LOWS IN THE
LOWER TO MIDDLE 70S AND HIGHS IN THE LOWER TO MIDDLE 90S ACROSS THE
REGION THROUGH WEDNESDAY.

IN THE EXTENDED...THURSDAY THROUGH SUNDAY...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL REMAIN ANCHORED OVER THE SOUTHWESTERN UNITED
STATES THROUGH THE PERIOD WITH THE LOWER MISSISSIPPI VALLEY IN AN
AREA OF UPPER LEVEL NORTHWESTERLY FLOW. ACCORDING TO AVN EXTENDED
MODEL...A COLD FRONT IS EXPECTED TO STALL ACROSS NORTHERN PORTIONS
OF MISSISSIPPI BY SATURDAY...WHICH WILL HELP TO KEEP SCATTERED
SHOWERS AND THUNDERSTORMS IN THE FORECAST INTO THE WEEK-END. EXPECT
CONTINUED PATTERN OF SEASONALLY VERY WARM AND HUMID CONDITIONS WITH
SCATTERED AFTERNOON AND EVENING THUNDERSTORMS EVERY DAY. AN
UNCERTAIN FACTOR IN THE EXTENDED PERIOD IS THE DEVELOPING TROPICAL
LOW PRESSURE SYSTEM IN THE CENTRAL GULF OF MEXICO. THIS SYSTEM COULD
REDUCE OR INCREASE PRECIPITATION CHANCES BY THE MIDDLE OF THE
WEEK...DEPENDING ON THE STRENGTH OF THE STORM AND THE PATH OF
MOVEMENT.

JAN   74  95  74  95 /  10  30  10  30
MEI   72  95  72  95 /  20  30  10  30

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

15

In the hours before

Local storm report, Jul 7, 3:38 PM CDT, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
338 PM CDT SUN JUL 07 2002

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

0307 PM    12SE BROOKHAVEN           MS   WIND DAMAGE
07/07/02   LINCOLN                        C.D. REPORTED NUMEROUS
                                          TREES DOWN AT
                                          INTERSECTION OF HIGHWAYS
                                          569 AND 98.

0305 PM    15SE BROOKHAVEN           MS   0.75 INCH HAIL
07/07/02   LINCOLN                        C.D. REPORTED DIME SIZE
                                          HAIL.

0305 PM    14SW MONTICELLO           MS   0.75 INCH HAIL
07/07/02   LAWRENCE                       C.D. REPORTED DIME SIZE
                                          HAIL.

Local storm report, Jul 7, 3:51 PM CDT, 4 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
351 PM CDT SUN JUL 07 2002

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

0348 PM    5N LAUREL                 MS   0.75 INCH HAIL
07/07/02   JONES                          E.O.C. REPORTED DIME SIZE
                                          HAIL.

Local storm report, Jul 7, 5:09 PM CDT, 2 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
509 PM CDT SUN JUL 07 2002

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

0328 PM    BAY SPRINGS               MS   WIND DAMAGE
07/07/02   JASPER                         NUMEROUS TREES AND
                                          POWERLINES DOWN FROM BAY
                                          SPRINGS TO MONTROSE FROM
                                          328 THROUGH 340 PM. SOME
                                          TREES WERE BLOCKING
                                          ROADS. REPORTED BY JASPER
                                          COUNTY EMA.

0328 PM    STRINGER                  MS   1.00 INCH HAIL
07/07/02   JASPER                         HAIL FROM DIME TO QUARTER
                                          SIZE OCCURRED FROM AROUND
                                          328 THROUGH 340 PM FROM
                                          STRINGER TO MONTROSE IN
                                          WESTERN SECTIONS OF THE
                                          COUNTY. REPORTED BY
                                          JASPER COUNTY EMA.

0430 PM    CARNES                    MS   0.75 INCH HAIL
07/07/02   FORREST                        REPORTED BY FORREST
                                          COUNTY EMA.

0445 PM    CARNES                    MS   WIND DAMAGE
07/07/02   FORREST                        A SEVERAL TREES WERE
                                          BLOWN DOWN. ONE TREE FELL
                                          ON A HOUSE. REPORTED BY
                                          COUNTY EMA.

0445 PM    2N COLLINS                MS   WIND DAMAGE
07/07/02   COVINGTON                      LARGE LIMBS DOWN.
                                          REPORTED BY THE PUBLIC.

Local storm report, Jul 7, 5:45 PM CDT, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
545 PM CDT SUN JUL 07 2002

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

0534 PM    3N COLUMBIA               MS   1.75 INCH HAIL
07/07/02   MARION                         GOLFBALL SIZED HAIL
                                          OCCURRED FOR AT LEAST 10
                                          MINUTES AND COVERED THE
                                          GROUND AT 3N COLUMBIA ON
                                          HIGHWAY 13 AND IN THE
                                          TOWN OF
                                          COLUMBIA...REPORTED BY
                                          MARION CO. EOC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 7:07 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	28 min
Jul 7, 7:38 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	47 min
Jul 7, 7:47 PM CDT	Severe Thunderstorm Warning	JAN	Franklin	43 min
Jul 7, 7:59 PM CDT	Severe Thunderstorm Warning	JAN	Adams	46 min
Jul 7, 8:10 PM CDT	Tornado Warning	JAN	Hinds	30 min
Jul 8, 3:49 PM CDT	Severe Thunderstorm Warning	JAN	Carroll	31 min
Jul 8, 3:52 PM CDT	Severe Thunderstorm Warning	JAN	Leflore	43 min
Jul 8, 5:15 PM CDT	Severe Thunderstorm Warning	JAN	Jones	45 min
Jul 8, 5:30 PM CDT	Severe Thunderstorm Warning	JAN	Forrest	40 min
Jul 8, 6:22 PM CDT	Severe Thunderstorm Warning	JAN	Covington	38 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2002 Every severe thunderstorm warning in 2002

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.