Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 244, NWS Jackson, MS

May 21, 2012Yazoo County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 21, 2012, 3:53 PM CDT for Yazoo County, Mississippi. It was in force for 12 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 21, 2012, 3:53 PM CDT (20:53 UTC)
Expired: May 21, 2012, 4:05 PM CDT
In force: 12 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 76 km from the middle of the area, began a volume at 20:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 21, 3:55 PM CDT	TSTM WND DMG	5 Nw Yazoo City, MS	REPORTS OF TREES DOWN ON LAKE CITY ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 2 minutes after it went out.

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 12:00Z, 8.9 hours before the alert went out and 68 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: 518 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1663 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 14 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.

105 
WUUS54 KJAN 212053
SVRJAN
MSC163-212130-
/O.NEW.KJAN.SV.W.0244.120521T2053Z-120521T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
353 PM CDT MON MAY 21 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL YAZOO COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF YAZOO CITY...

* UNTIL 430 PM CDT

* AT 353 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  YAZOO CITY MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  YAZOO CITY BY 400 PM CDT...
  BENTON BY 420 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WINDS OF 60 MPH CAN BRING DOWN TREES...POSSIBLY RESULTING IN INJURY
AND PROPERTY DAMAGE. ROOFS OF MOBILE HOMES AND OUTBUILDINGS COULD BE
DAMAGED...AND MINOR ROOF DAMAGE TO WELL BUILT HOMES AND STRUCTURES
COULD OCCUR.

&&

LAT...LON 3283 9022 3270 9044 3289 9056 3293 9050
      3293 9045 3295 9044
TIME...MOT...LOC 2053Z 319DEG 19KT 3287 9044

$$

BK

1 follow-up statement

134 
WWUS54 KJAN 212105
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
405 PM CDT MON MAY 21 2012

MSC163-212116-
/O.CAN.KJAN.SV.W.0244.000000T0000Z-120521T2130Z/
YAZOO MS-
405 PM CDT MON MAY 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL YAZOO COUNTY IS
CANCELLED...

LAT...LON 3283 9022 3270 9044 3289 9056 3293 9050
      3293 9045 3295 9044
TIME...MOT...LOC 2106Z 319DEG 19KT 3282 9039

$$

BK

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 May 21, 10:35 AM CDT, 5 hours 18 minutes earlier.

Area forecast discussion, May 21, 10:35 AM CDT, 5 hours 18 minutes before

AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE JACKSON MS
1035 AM CDT MON MAY 21 2012

.UPDATE...THE PREVIOUS STRATIFORM RAIN BAND HAS SINCE DISSIPATED WITH
A SMALL SECONDARY TSTORM CLUSTER SHIFTING SE ACROSS EC MS AT THIS
TIME. THIS CLUSTER HAS SHOWN AN OVERALL WEAKENING TREND OVER THE PAST
HALF HOUR.

LATEST VIS SHOWS MORNING MID/HIGH CLOUDS LOSING OPACITY AND SHIFTING
EAST ALLOWING FOR INSOLATION TO RESUME ACROSS THE DELTA REGION. THIS
WILL LEAD TO GREATER TEMP AND THUS INSTABILITY INCREASES THROUGH THE
LATE MORNING HOURS. AGITATED CUMULUS FIELD AND INCREASING ALTO DECK
HAS BUILT ALONG AND AHEAD OF THE SFC FRONT IN N-CNTRL AR AS S/WV
SHEAR AXIS AIDS IN BETTER DEEP-LYR LIFT. EXPECT THIS AREA TO BE THE
INITIATION AREA AND WITH SHOWERS/STORMS PROPAGATING SE INTO THE
DELTA AND NRN AREAS THIS AFTN AS MODIFIED KJAN SOUNDING INDICATES
~2200 SBCAPE WITH FAVORABLE LAPSE RATES WITH ENOUGH SUPPORTIVE SHEAR
TO AID IN STORM ORGANIZATION. EXPECT SHOWERS/TSTORMS TO BECOME
SCATTERED TO NUMEROUS THIS AFTN ACROSS NRN/CNTRL AREAS WITH SOME
POSSIBLY BECOMING STRONG TO SEVERE AS THEY CONTINUE TO SHIFT SOUTH.
MAIN RISKS CONTINUE TO BE WIND GUSTS TO 60 MPH AND QUARTER SIZED HAIL
IN THE STRONGEST OF STORMS FROM 1PM-8PM.

CONCERNING OTHER FORECAST ELEMENTS...HOURLY TEMPS WERE ADJUSTED TO
ACCOUNT FOR LATEST TRENDS WITH THE SE WARMING QUICKLY DUE TO NO CLOUD
COVER AND GTR BEING THE SLOWEST. MAX TEMPS WERE REDUCED A DEGREE OR
SO GIVEN LATEST TRENDS. POPS WERE REDUCED ACROSS CNTRL/SRN ZONES
THROUGH NOON WITH INCREASING CHANCES THROUGH THE 1-8PM WINDOW.
RAIN CHANCES WILL DECREASE BUT LINGER THROUGH THE OVERNIGHT AS FRONT
SLOWLY SLIDES SOUTH THROUGH THE REGION. /ALLEN/

&&

.AVIATION...TSRA COVERAGE WILL EXPAND EARLY THIS AFTERNOON ALONG THE
HWY 82 CORRIDOR WITH THIS ACTIVITY MOVING S THRU THE AFTN AND INTO
THE EVENING. ISOLD SEVERE TSRA(GUSTY WINDS AND HAIL) WILL BE PSBL AS
THIS ACTIVITY PASSES. VFR CONDS TO PREVAIL FOR THE MOST PART BUT A
TEMPORARY DROP TO IFR IN RAIN WILL BE PSBL WITH TSRA. WINDS WILL
GRADUALLY BECOME WRLY AND THEN NRLY TODAY AS A COLD FRONT APPROACHES
THE REGION FROM THE NORTH. /BK/

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       87  63  84  56 /  65  33   2   0
MERIDIAN      87  63  84  55 /  65  37   2   0
VICKSBURG     88  62  84  56 /  57  26   1   0
HATTIESBURG   89  64  88  60 /  46  28   9   5
NATCHEZ       86  64  85  61 /  45  26   2   0
GREENVILLE    86  58  81  57 /  62  21   1   0
GREENWOOD     86  60  81  53 /  63  22   1   0

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...NONE.
LA...NONE.
AR...NONE.
&&

ALLEN/BK

Hazardous weather outlook, May 21, 2:49 PM CDT, 1 hour 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
249 PM CDT MON MAY 21 2012

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
222000-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-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-CLAIBORNE-COPIAH-
SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
249 PM CDT MON MAY 21 2012

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

.DAY ONE...TONIGHT AND TUESDAY

A FEW STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS THE
ARKLAMISS INTO THE EVENING HOURS AHEAD OF A COLD FRONT THAT WILL MOVE
SOUTH ACROSS THE REGION TONIGHT. THE PRIMARY RISKS WILL BE DAMAGING
WIND GUSTS OF 50 TO 60 MPH AND QUARTER SIZE HAIL. THE STORMS WILL
GENERALLY MOVE TO THE SOUTH SOUTHEAST THROUGH THE AFTERNOON...WITH
MOST OF THE STRONG TO SEVERE ACTIVITY ENDING BETWEEN 8 AND 9 PM.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH SUNDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.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 UNTIL 8 OR 9 PM THIS EVENING.

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

BK

In the hours before

Special weather statement, May 21, 2:17 PM CDT, 1 hour 36 minutes before

MSZ042-043-211945-
MADISON MS-YAZOO MS-
217 PM CDT MON MAY 21 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
217 PM CDT MON MAY 21 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED 5 MILES NORTHWEST OF BENTON AT 217 PM
CDT...MOVING SOUTHEAST AT 25 MPH.

PEOPLE IN EASTERN YAZOO AND CENTRAL MADISON COUNTIES SHOULD MONITOR
THIS STORM CLOSELY.

LAT...LON 3271 8986 3252 9006 3285 9045 3299 9031
TIME...MOT...LOC 1917Z 311DEG 20KT 3286 9030

Local storm report, May 21, 3:10 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
310 PM CDT MON MAY 21 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     HAIL             2 E ITTA BENA           33.50N 90.29W
05/21/2012  E1.00 INCH       LEFLORE            MS   EMERGENCY MNGR

            NICKEL TO QUARTER HAIL

&&

CME

Special weather statement, May 21, 3:15 PM CDT, 38 minutes before

MSZ053-054-059-212045-
JEFFERSON MS-COPIAH MS-CLAIBORNE MS-
315 PM CDT MON MAY 21 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
315 PM CDT MON MAY 21 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL WAS
LOCATED 4 MILES WEST OF PATTISON AT 316 PM CDT...MOVING SOUTHEAST AT
15 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN SOUTH CENTRAL CLAIBORNE...SOUTHWESTERN COPIAH AND EASTERN
JEFFERSON COUNTIES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3177 9069 3163 9089 3188 9110 3200 9094
TIME...MOT...LOC 2016Z 321DEG 13KT 3187 9095

Local storm report, May 21, 3:33 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
333 PM CDT MON MAY 21 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0331 PM     HAIL             2 SW MENDENHALL         31.94N 89.89W
05/21/2012  E0.75 INCH       SIMPSON            MS   911 CALL CENTER

            PENNY HAIL AND GUSTY WINDS NO ESTIMATED SPEED AT THIS
            TIME...OCCURRING NEAR HIGHWAY 13 AND STRONG RIVER
            ROAD...JUST SOUTHWEST OF MENDENHALL...REPORTED BY LAW
            ENFORCEMENT.

&&

Local storm report, May 21, 3:36 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSON MS
336 PM CDT MON MAY 21 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0331 PM     HAIL             2 N MENDENHALL          31.99N 89.87W
05/21/2012  E0.75 INCH       SIMPSON            MS   911 CALL CENTER

            PENNY HAIL AND GUSTY WINDS NO ESTIMATED SPEED AT THIS
            TIME...OCCURRING NEAR HIGHWAY 13 AND STRONG RIVER
            ROAD...JUST NORTH OF MENDENHALL...REPORTED BY LAW
            ENFORCEMENT.

&&

Local storm report, May 21, 3:51 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
351 PM CDT MON MAY 21 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     HAIL             WATERPROOF              31.81N 91.39W
05/21/2012  E1.00 INCH       TENSAS             LA   PUBLIC

&&

CME

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 3:31 AM CDT	Special Weather Statement	JAN	Carroll	54 min
May 21, 6:19 AM CDT	Special Weather Statement	JAN	Sharkey	31 min
May 21, 9:13 AM CDT	Special Weather Statement	JAN	Attala	32 min
May 21, 2:12 PM CDT	Special Weather Statement	JAN	Jefferson	28 min
May 21, 2:17 PM CDT	Special Weather Statement	JAN	Madison	28 min
May 21, 2:33 PM CDT	Flash Flood Warning	JAN	Jefferson	117 min
May 21, 2:40 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	23 min
May 21, 2:54 PM CDT	Severe Thunderstorm Warning	JAN	Leflore	26 min
May 21, 3:15 PM CDT	Special Weather Statement	JAN	Claiborne	30 min
May 21, 3:17 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Jefferson	43 min
May 21, 3:18 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Simpson	42 min
May 21, 3:18 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Madison, Rankin	27 min
May 21, 3:31 PM CDT	Severe Thunderstorm Warning	JAN	Webster	44 min
May 21, 3:33 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Warren	27 min
May 21, 3:34 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Issaquena, Madison, Warren	41 min
May 21, 3:50 PM CDT	Severe Thunderstorm Warning	JAN	Warren	40 min
May 21, 3:55 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Montgomery, Webster	50 min
May 21, 3:57 PM CDT	Special Weather Statement	JAN	Claiborne	28 min
May 21, 4:09 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Rankin	51 min
May 21, 4:23 PM CDT	Severe Thunderstorm Warning	JAN	Adams	37 min
May 21, 4:26 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Warren	25 min
May 21, 4:38 PM CDT	Special Weather Statement	JAN	Yazoo	32 min
May 21, 4:39 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Winston	39 min
May 21, 4:44 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Leake, Neshoba, Winston	46 min
May 21, 4:50 PM CDT	Severe Thunderstorm Warning	JAN	Copiah, Hinds, Rankin, Simpson	40 min
May 21, 4:52 PM CDT	Special Weather Statement	JAN	Warren	13 min
May 21, 5:04 PM CDT	Severe Thunderstorm Warning	JAN	Warren	26 min
May 21, 5:17 PM CDT	Severe Thunderstorm Warning	JAN	Neshoba	28 min
May 21, 5:21 PM CDT	Special Weather Statement	JAN	Jefferson Davis	39 min
May 21, 5:24 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis	15 min
May 21, 5:27 PM CDT	Special Weather Statement	JAN	Bolivar	18 min
May 21, 5:28 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake, Neshoba	32 min
May 21, 5:42 PM CDT	Special Weather Statement	JAN	Jefferson Davis	28 min
May 21, 5:48 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis	42 min
May 21, 5:51 PM CDT	Severe Thunderstorm Warning	JAN	Neshoba	39 min
May 21, 5:56 PM CDT	Special Weather Statement	JAN	Jasper	29 min
May 21, 5:59 PM CDT	Special Weather Statement	JAN	Lauderdale	21 min
May 21, 6:00 PM CDT	Severe Thunderstorm Warning	JAN	Leake, Neshoba	45 min
May 21, 6:03 PM CDT	Special Weather Statement	JAN	Humphreys	22 min
May 21, 6:15 PM CDT	Special Weather Statement	JAN	Madison	20 min
May 21, 6:21 PM CDT	Special Weather Statement	JAN	Claiborne	29 min
May 21, 6:27 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Yazoo	33 min
May 21, 6:30 PM CDT	Severe Thunderstorm Warning	JAN	Sharkey, Yazoo	30 min
May 21, 6:46 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale, Newton	29 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.