Alert archive / Mississippi / Special Weather Statements in 2012

Special Weather Statement, NWS Jackson, MS

August 16, 2012Issaquena County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 16, 2012, 4:15 PM CDT for Issaquena County, Mississippi. It was in force for 30 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 16, 2012, 4:15 PM CDT (21:15 UTC)
Expired: Aug 16, 2012, 4:45 PM CDT
In force: 30 min
Issued by: NWS Jackson, MS

County Issaquena County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.3 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: 2430 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -58 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 16, 4:00 PM CDT, 15 minutes earlier.

Area forecast discussion, Aug 16, 4:00 PM CDT, 15 minutes before

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Hazardous weather outlook, Aug 16, 3:52 PM CDT, 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
352 PM CDT THU AUG 16 2012

LAZ024-026-MSZ053>066-072>074-172100-
CATAHOULA-CONCORDIA-CLAIBORNE-COPIAH-SIMPSON-SMITH-JASPER-CLARKE-
JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-LAWRENCE-JEFFERSON DAVIS-
COVINGTON-JONES-MARION-LAMAR-FORREST-
352 PM CDT THU AUG 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEASTERN
LOUISIANA AND CENTRAL MISSISSIPPI GENERALLY SOUTH OF THE INTERSTATE
TWENTY CORRIDOR.

.DAY ONE...TONIGHT AND FRIDAY

STRONG TO SEVERE STORMS ARE POSSIBLE FRIDAY. THE MOST INTENSE COULD
CONTAIN WIND GUSTS UP TO 60 MPH AS WELL HAIL UP TO THE SIZE OF
QUARTERS. MANY STORMS WILL BE CAPABLE OF PRODUCING FREQUENT LIGHTNING
STRIKES AND HEAVY DOWNPOURS.

A COLD FRONT WILL BEGIN APPROACHING THE REGION FROM THE NORTH ON
FRIDAY AND WILL TRIGGER THUNDERSTORMS THAT WILL DEVELOP SOUTH INTO
THE HEART OF THE ARKLAMISS DURING THE DAY FRIDAY. HIGH INSTABILITY
LEVELS COMBINED WITH A BIT OF WIND SHEAR WILL BE A FAVORABLE
ENVIRONMENT TO PRODUCE AT LEAST ISOLATED SEVERE STORMS.

.DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH WEDNESDAY

STRONG TO SEVERE STORMS WILL CONTINUE TO BE POSSIBLE INTERMITTENTLY
BETWEEN FRIDAY NIGHT AND LATE SUNDAY AS AN ACTIVE WEATHER PATTERN
PERSISTS. THE MOST INTENSE STORMS COULD CONTAIN WIND GUSTS UP TO 60
MPH AS WELL AS HAIL UP TO THE SIZE OF QUARTERS. MANY STORMS WILL
AGAIN BE CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES AND HEAVY
DOWNPOURS.

IN ADDITION...ISOLATED RAINFALL TOTALS FROM FRIDAY THROUGH THE
WEEKEND WILL LIKELY BE UP TO OR GREATER THAN 3 INCHES. IN A FEW
LOCATIONS THIS COULD LEAD TO AT LEAST MINOR FLOODING
PROBLEMS...ALTHOUGH WIDESPREAD FLOODING ISSUES ARE NOT ANTICIPATED AT
THIS TIME.

.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 TOMORROW INTO THE WEEKEND.

ARZ074-075-LAZ007>009-015-016-023-025-MSZ018-019-025>052-172100-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-TENSAS-BOLIVAR-SUNFLOWER-LEFLORE-GRENADA-
CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-CHOCTAW-OKTIBBEHA-
WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-NOXUBEE-ISSAQUENA-
SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER-WARREN-HINDS-RANKIN-
SCOTT-NEWTON-LAUDERDALE-
352 PM CDT THU AUG 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHEASTERN ARKANSAS
AND PORTIONS OF NORTHEASTERN LOUISIANA AND CENTRAL MISSISSIPPI ALONG
AND NORTH OF THE INTERSTATE TWENTY CORRIDOR.

.DAY ONE...TONIGHT AND FRIDAY

STRONG TO SEVERE STORMS ARE POSSIBLE THROUGH THIS EVENING AND AGAIN
ON FRIDAY. THE MOST INTENSE COULD CONTAIN WIND GUSTS UP TO 60 MPH AS
WELL HAIL UP TO THE SIZE OF QUARTERS. MANY STORMS WILL BE CAPABLE OF
PRODUCING FREQUENT LIGHTNING STRIKES AND HEAVY DOWNPOURS.

A COLD FRONT WILL BEGIN APPROACHING THE REGION FROM THE NORTH THIS
EVENING AND INTO FRIDAY. THIS FEATURE WILL TRIGGER THUNDERSTORMS THAT
SHOULD WILL DEVELOP GRADUALLY SOUTH INTO THE HEART OF THE ARKLAMISS
LATE TODAY THROUGH FRIDAY. HIGH INSTABILITY LEVELS COMBINED WITH A
BIT OF WIND SHEAR WILL BE A FAVORABLE ENVIRONMENT TO PRODUCE AT LEAST
ISOLATED SEVERE STORMS.

.DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH WEDNESDAY

STRONG TO SEVERE STORMS WILL CONTINUE TO BE POSSIBLE INTERMITTENTLY
BETWEEN FRIDAY NIGHT AND SUNDAY...ESPECIALLY ALONG THE INTERSTATE
TWENTY CORRIDOR...AS AN ACTIVE WEATHER PATTERN PERSISTS. THE MOST INTENSE
STORMS COULD CONTAIN WIND GUSTS UP TO 60 MPH AS WELL AS HAIL UP TO
THE SIZE OF QUARTERS. MANY STORMS WILL AGAIN BE CAPABLE OF PRODUCING
FREQUENT LIGHTNING STRIKES AND HEAVY DOWNPOURS.

IN ADDITION...ISOLATED RAINFALL TOTALS FROM FRIDAY THROUGH THE
WEEKEND WILL LIKELY BE UP TO OR GREATER THAN 2 INCHES. IN A FEW
LOCATIONS THIS COULD LEAD TO MINOR FLOODING PROBLEMS...ALTHOUGH
WIDESPREAD FLOODING ISSUES ARE NOT ANTICIPATED AT THIS TIME.

.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 TOMORROW THROUGH AT LEAST SATURDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN.

50

In the hours before

Special weather statement, Aug 16, 2:58 PM CDT, 1 hour 17 minutes before

MSZ040-041-162045-
SHARKEY MS-ISSAQUENA MS-
258 PM CDT THU AUG 16 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
258 PM CDT THU AUG 16 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED 4 MILES NORTH OF FITLER AT 258 PM
CDT...MOVING EAST AT 15 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS STORM.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN CENTRAL ISSAQUENA AND WEST CENTRAL SHARKEY COUNTIES SHOULD
MONITOR THIS STORM CLOSELY.

LAT...LON 3284 9115 3285 9113 3285 9111 3287 9109
      3293 9083 3271 9079 3268 9110 3272 9105
      3274 9110 3274 9115 3282 9117
TIME...MOT...LOC 1958Z 260DEG 11KT 3278 9105

19

Special weather statement, Aug 16, 3:31 PM CDT, 44 minutes before

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Special weather statement, Aug 16, 3:46 PM CDT, 29 minutes before

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Special weather statement, Aug 16, 4:00 PM CDT, 15 minutes before

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Special weather statement, Aug 16, 4:01 PM CDT, 14 minutes before

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Special weather statement, Aug 16, 4:15 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 1:28 PM CDT	Special Weather Statement	JAN	Clarke	32 min
Aug 16, 1:31 PM CDT	Special Weather Statement	JAN	Leake	59 min
Aug 16, 1:51 PM CDT	Special Weather Statement	JAN	Winston	59 min
Aug 16, 2:02 PM CDT	Severe Thunderstorm Warning	JAN	Winston	58 min
Aug 16, 2:12 PM CDT	Special Weather Statement	JAN	Lauderdale	63 min
Aug 16, 2:30 PM CDT	Severe Thunderstorm Warning	JAN	Winston	60 min
Aug 16, 2:36 PM CDT	Special Weather Statement	JAN	Choctaw	59 min
Aug 16, 2:48 PM CDT	Special Weather Statement	JAN	Clarke	32 min
Aug 16, 2:58 PM CDT	Special Weather Statement	JAN	Issaquena, Sharkey	47 min
Aug 16, 3:11 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	49 min
Aug 16, 3:22 PM CDT	Severe Thunderstorm Warning	JAN	Newton	38 min
Aug 16, 3:31 PM CDT	Special Weather Statement	JAN	Jones	29 min
Aug 16, 3:46 PM CDT	Flash Flood Warning	JAN	Lauderdale, Newton	73 min
Aug 16, 4:01 PM CDT	Special Weather Statement	JAN	Lauderdale	29 min
Aug 16, 4:16 PM CDT	Special Weather Statement	JAN	Warren	29 min
Aug 16, 4:18 PM CDT	Special Weather Statement	JAN	Newton	32 min
Aug 16, 4:19 PM CDT	Special Weather Statement	JAN	Scott	46 min
Aug 16, 4:21 PM CDT	Severe Thunderstorm Warning	JAN	Newton, Scott	54 min
Aug 16, 4:33 PM CDT	Special Weather Statement	JAN	Forrest	47 min
Aug 16, 4:43 PM CDT	Special Weather Statement	JAN	Madison	32 min
Aug 16, 5:17 PM CDT	Special Weather Statement	JAN	Scott	43 min
Aug 16, 5:19 PM CDT	Special Weather Statement	JAN	Newton	46 min
Aug 16, 5:21 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott	39 min
Aug 16, 5:37 PM CDT	Special Weather Statement	JAN	Madison	38 min
Aug 16, 6:07 PM CDT	Special Weather Statement	JAN	Scott	48 min
Aug 16, 6:32 PM CDT	Special Weather Statement	JAN	Forrest	43 min
Aug 16, 6:36 PM CDT	Special Weather Statement	JAN	Lamar	29 min
Aug 16, 6:40 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Holmes	50 min
Aug 16, 2:55 PM CDT	Special Weather Statement	JAN	Morehouse	30 min
Aug 16, 3:46 PM CDT	Special Weather Statement	JAN	East Carroll	44 min
Aug 16, 4:00 PM CDT	Special Weather Statement	JAN	Morehouse	30 min
Aug 16, 4:50 PM CDT	Special Weather Statement	JAN	Catahoula	30 min

Nearby

Special Weather Statements in Mississippi, 2012 Every special weather statement in 2012

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.