Alert archive / Mississippi / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 410, NWS Jackson, MS

August 2, 2002Copiah County, Lincoln County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 2, 2002, 8:56 PM CDT for Copiah County, Lincoln 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: Aug 2, 2002, 8:56 PM CDT (01:56 UTC)
Expired: Aug 2, 2002, 9:40 PM CDT
In force: 44 min
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

Counties Copiah County, MS, Lincoln 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, 1.9 hours before the alert went out and 80 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: 3945 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1172 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

904 
WUUS54 KJAN 030156
SVRJAN
MSC029-085-030240-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
855 PM CDT FRI AUG 2 2002

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COPIAH COUNTY IN CENTRAL MISSISSIPPI
  LINCOLN COUNTY IN SOUTH CENTRAL MISSISSIPPI

* UNTIL 940 PM CDT

* AT 855 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WESSON...OR ABOUT 7 MILES NORTHEAST OF
  BROOKHAVEN. THIS STORM WAS MOVING WEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL...
  REMAIN OVER RURAL LINCOLN COUNTY 
  REMAIN OVER RURAL COPIAH COUNTY 

DAMAGING WINDS AND TORRENTIAL RAINS ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.

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

LAT...LON 3161 9029 3178 9032 3176 9071 3162 9072

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 Aug 2, 2:30 PM CDT, 6 hours 26 minutes earlier.

Area forecast discussion, Aug 2, 2:30 PM CDT, 6 hours 26 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
230 PM CDT FRI AUG 2 2002

MAIN FORECAST CHALLENGES WILL BE TIMING AND INTENSITY OF SHORTWAVES
AND STRENGTH OF RIDGING FROM THE N. MODELS ONCE AGAIN DIFFER ON
STRENGTH AND POSITION OF WAVES MOVING OVER REGION BENEATH HIGH
PRESSURE RIDGE POSITIONED TO OUR NORTH. WATER VAPOR PIX SHOW DEFINED
SHORTWAVES IN FLOW...MORE IN LINE WITH AVN THAN MORE ILL DEFINED
ETA...SO WILL FOLLOW AVN SOLUTION.

SHORTWAVE FORECAST TO DROP ACROSS REGION TONIGHT WITH ASSOCIATED
UPPER JET MAX BUT MOST ACTIVITY WILL END DURING THE EVENING. NEXT
WAVE FORECAST ACROSS SE MS CORNER TOMORROW BUT WITH LITTLE OR NO JET
SUPPORT. UPPER TROF DEVELOPING TO THE E BECOMES MORE DEFINED SUNDAY
AS CENTER OF BROAD TROF SHIFTS INTO THE NRN GULF. ANOTHER WAVE TO
PUSH INTO ERN ZONES SUNDAY ABD CROSS THE REGION SUNDAY NIGHT. WEAK
UPPER LEVEL SHEAR ZONE ALSO NOTED ACROSS SE COUNTIES TO LIFT SLOWLY
NWD AND 850 MB LOW SHIFTS WWD INTO ERN ZONES BY 00Z MON.
HOWEVER...MODELS SHOW SIGNIFICANT DECREASE IN MOISTURE FIELD WITH
MEAN RH VALUES LESS THAN 40 PERCENT AND PRECIPTABLE WATER BELOW 1.5
INCHES FOR THE FIRST TIME IN A WHILE. WILL KEEP BEST CHANCE OF RAIN
EAST CENTRAL AND SRN POPS BUT SHOULD SEE MORE HIT AND MISS
CONVECTION RATHER THAN LARGE CONVECTIVE ELEMENTS WITH HEAVY RAIN.
ANOTHER VORT LOBE IS SHIFTED ACROSS THE REGION SUNDAY NIGHT. THE
UPPER SHEAR ZONE CONTINUES AND THE 850 MB LOW WILL BE CENTERED OVER
EAST CENTRAL MS BY MONDAY MORNING SO WILL KEEP AT LEAST SLIGHT
CHANCE POPS FOR SUNDAY NIGHT.

FALT UPPER TROUGH TO BE POSITIONED FROM TX COAST TO FL PANHANDLE BY
MONDAY WITH INCREASING MOSITURE FIELDS AND AN 850 MB LOW ACROSS THE
FORECAST AREA. PRECIPITABLE WATER VALUES RETURN TO 2 INCHES AND
ABOVE SO WILL INCREASE POPS TO AT LEAST CHANCE ALL OF REGION.

UPPER TROUGH SHIFTS TO S AND W WITH TIME AND WILL RETURN TO MORE OF
A SCATTERED AFTERNOON CONVECTION REGIME WITH ISOLATED CELLS THROUGH
THE EARLY EVENING. BEST RAIN CHANCE WILL BE SRN AREAS THROUGH THE
EXTENDED PERIOD AS UPPER RIDGING HAMPERS CONVECTION N.

PRELIM NUMBERS...
JAN 72/94/71/93/73 1213
MEI 71/93/70/92/72 1324

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

In the hours before

Local storm report, Aug 2, 6:21 PM CDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
621 PM CDT FRI AUG 02 2002

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

0600 PM    LAUREL                    MS   WIND DAMAGE
08/02/02   JONES                          NUMEROUS TREES AND
                                          POWERLINES DOWN IN THE
                                          MYRICK AREA. ONE TREE ON
                                          A HOUSE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:29 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	46 min
Aug 3, 5:17 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	43 min
Aug 3, 5:18 PM CDT	Severe Thunderstorm Warning	JAN	Madison	47 min
Aug 3, 5:24 PM CDT	Severe Thunderstorm Warning	JAN	Rankin	41 min
Aug 3, 5:57 PM CDT	Severe Thunderstorm Warning	JAN	Smith	23 min
Aug 3, 6:12 PM CDT	Severe Thunderstorm Warning	JAN	Clarke	28 min
Aug 3, 6:34 PM CDT	Severe Thunderstorm Warning	JAN	Scott	46 min
Aug 3, 6:39 PM CDT	Severe Thunderstorm Warning	JAN	Leake	41 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.