Alert archive / Mississippi / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 356, NWS Jackson, MS

July 21, 2002Grenada County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 21, 2002, 6:51 PM CDT for Grenada County, Mississippi. It was in force for 49 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 21, 2002, 6:51 PM CDT (23:51 UTC)
Expired: Jul 21, 2002, 7:40 PM CDT
In force: 49 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 nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.9 hours before the alert went out and 123 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: 4554 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

985 
WUUS54 KJAN 212351
SVRJAN
MSC043-220040-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
650 PM CDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

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

* UNTIL 740 PM CDT

* AT 650 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 18 MILES EAST OF GRENADA...MOVING WEST AT 10 
  MPH.

* THE SEVERE THUNDERSTORM WILL...
  MOVE ALONG HIGHWAY 8 AND APPROACH GORE SPRINGS BY 730 PM

DAMAGING WINDS...HEAVY RAIN AND HAIL ARE LIKELY. SEEK SHELTER IN A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 3370 8951 3389 8951 3384 8972 3369 8970

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 21, 3:25 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Jul 21, 3:25 PM CDT, 3 hours 26 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
325 PM CDT SUN JUL 21 2002

THE MAIN FORECAST CONCERN OVER THE NEXT FEW DAYS WILL CONTINUE TO BE
THE CHANCE OF SHOWERS AND THUNDERSTORMS AND THE EFFECT OF A MID
SUMMER FRONT THAT SHOULD PUSH INTO MISSISSIPPI BY WEDNESDAY.

FOR TONIGHT...EXPECT THUNDERSTORM ACTIVITY TO PERSIST INTO THE
EVENING HOURS AS BOUNDARIES FROM ONGOING CONVECTION CONTINUE TO
INITIATE ADDITIONAL SHOWER AND THUNDERSTORM ACTIVITY UP TO SEVERAL
HOURS AFTER SUNSET. A FEW SHOWERS OR THUNDERSTORMS COULD ALSO
DEVELOP LATER ON DURING THE NIGHT...BUT COVERAGE AFTER 9 PM SHOULD
BE VERY ISOLATED. FOR MONDAY AND TUESDAY...NOT MUCH CHANGE. EXPECT
CONTINUED WARM AND HUMID CONDITIONS WITH SCATTERED MAINLY AFTERNOON
AND EVENING THUNDERSTORMS. THUNDERSTORM ACTIVITY TUESDAY EVENING MAY
CONTINUE THROUGH THE NIGHT ACROSS PORTIONS OF THE FORECAST AREA DUE
TO AN APPROACHING FRONTAL SYSTEM. WILL KEEP SCATTERED SHOWERS AND
THUNDERSTORMS IN FORECAST FOR ALL ZONES THROUGH WEDNESDAY. WILL GO
WITH POPS FOR WEDNESDAY IN THE 40 PERCENT RANGE DUE TO ANTICIPATED
MOVEMENT OF A WEAK FRONT THROUGH MISSISSIPPI AND NORTHEAST LOUISIANA
DURING THE DAY.

FOR TEMPERATURES...MORE OF THE SAME WARM AND HUMID CONDITIONS.
SLIGHTLY COOLER TEMPERATURES ARE EXPECTED IN NORTHERN ZONES DUE TO
THE IMPACT OF THE FRONT...BUT WILL STILL KEEP HIGHS AROUND 90 THERE.
NOT MUCH CHANCE OF SIGNIFICANTLY COOL AIR MAKING IT INTO OUR
FORECAST AREA IN LATE JULY

IN THE EXTENDED...THURSDAY THROUGH SUNDAY...THUNDERSTORM ACTIVITY
SHOULD BE LESS WIDESPREAD THROUGH SATURDAY...ESPECIALLY IN NORTHERN
AND WESTERN SECTIONS AS DRIER AIR MOVES INTO THE LOWER MISSISSIPPI
VALLEY FOR SEVERAL DAYS. BY SUNDAY...EXPECT SCATTERED AFTERNOON AND
EVENING CONVECTION ONCE AGAIN. SLIGHTLY COOLER TEMPERATURES IN
NORTHERN SECTIONS ARE LIKELY FOR THURSDAY...BUT BACK INTO THE 90S
ACROSS THE ENTIRE FORECAST AREA BY FRIDAY.

PRELIM NUMBERS:
JAN 73/93/73/93 2423
MEI 72/92/72/92 2423

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

15

In the hours before

Local storm report, Jul 21, 5:41 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
541 PM CDT SUN JUL 21 2002

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

0525 PM    RIDGELAND                 MS   0.75 INCH HAIL
07/21/02   MADISON                        REPORTED BY HAM RADIO
                                          OPERATOR

Local storm report, Jul 21, 5:56 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
556 PM CDT SUN JUL 21 2002

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

0554 PM    BRANDON                   MS   1.00 INCH HAIL
07/21/02   RANKIN                         REPORTED BY SPOTTER

Local storm report, Jul 21, 6:02 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
602 PM CDT SUN JUL 21 2002

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

0554 PM    BRANDON                   MS   60 MPH WIND GUST
07/21/02   RANKIN                         SPOTTER REPORTED WIND
                                          GUST UP TO 60 MPH

Local storm report, Jul 21, 6:14 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
614 PM CDT SUN JUL 21 2002

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

0205 PM    5SW HAZLEHURST            MS   WIND DAMAGE
07/21/02   COPIAH                         TREE/LIMBS DOWN ACROSS
                                          ROAD

0215 PM                              MS   WIND DAMAGE
07/21/02   LAWRENCE                       NUMEROUS TREES DOWN
                                          ACROSS COUNTY

0300 PM    6SE LOUISVILLE            MS   WIND DAMAGE
07/21/02   WINSTON                        NUMEROUS TREES DOWN
                                          REPORTED BY WINSTON
                                          COUNTY EOC.

0545 PM    JACKSON AIRPORT           MS   50 MPH WIND GUST
07/21/02   RANKIN                         WIND EQUIPMENT AT THE
                                          JACKSON AIRPORT RECORDED
                                          A WIND GUST TO 51 MPH

Local storm report, Jul 21, 6:20 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
620 PM CDT SUN JUL 21 2002

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

0600 PM    BRANDON                   MS   WIND DAMAGE
07/21/02   RANKIN                         NUMEROUS TREES
                                          DOWN...REPORTED BY
                                          EMERGENCY MANAGEMENT

Local storm report, Jul 21, 6:49 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
649 PM CDT SUN JUL 21 2002

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

0445 PM    1W CAMERON                MS   WIND DAMAGE
07/21/02   MADISON                        NUMEROUS TREES DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 2:03 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale	42 min
Jul 21, 2:21 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jones, Lamar	44 min
Jul 21, 2:44 PM CDT	Severe Thunderstorm Warning	JAN	Winston	46 min
Jul 21, 2:53 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Lincoln, Marion	37 min
Jul 21, 2:54 PM CDT	Severe Thunderstorm Warning	JAN	Holmes	41 min
Jul 21, 3:01 PM CDT	Severe Thunderstorm Warning	JAN	Neshoba	39 min
Jul 21, 3:08 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Yazoo	42 min
Jul 21, 3:13 PM CDT	Severe Thunderstorm Warning	JAN	Jasper	42 min
Jul 21, 3:31 PM CDT	Severe Thunderstorm Warning	JAN	Lincoln	44 min
Jul 21, 3:37 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes	43 min
Jul 21, 3:44 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake	61 min
Jul 21, 3:53 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sunflower	52 min
Jul 21, 4:23 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes	42 min
Jul 21, 4:27 PM CDT	Severe Thunderstorm Warning	JAN	Madison, Yazoo	43 min
Jul 21, 4:41 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	59 min
Jul 21, 5:04 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes	46 min
Jul 21, 5:10 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Smith	60 min
Jul 21, 5:12 PM CDT	Severe Thunderstorm Warning	JAN	Madison	43 min
Jul 21, 5:25 PM CDT	Severe Thunderstorm Warning	JAN	Sharkey, Washington	40 min
Jul 21, 5:26 PM CDT	Severe Thunderstorm Warning	JAN	Oktibbeha	44 min
Jul 21, 5:30 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	40 min
Jul 21, 5:33 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	37 min
Jul 21, 6:07 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Webster	43 min
Jul 21, 6:12 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Rankin	48 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.