Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 486, NWS Jackson, MS

August 10, 2012Clay County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 10, 2012, 2:47 PM CDT for Clay County, Mississippi. It was in force for 43 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 10, 2012, 2:47 PM CDT (19:47 UTC)
Expired: Aug 10, 2012, 3:30 PM CDT
In force: 43 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Clay County, MS

The radar

The Columbus AFB radar (KGWX), 51 km from the middle of the area, began a volume at 19:50 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.

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 7.8 hours before the alert went out and 160 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: 153 J/kg
Mixed-layer CIN: -353 J/kg
Mixed-layer LCL: 1325 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 232 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.

860 
WUUS54 KJAN 101947
SVRJAN
MSC025-102030-
/O.NEW.KJAN.SV.W.0486.120810T1947Z-120810T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
247 PM CDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CLAY COUNTY IN NORTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF MONTPELIER...

* UNTIL 330 PM CDT

* AT 247 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
  MONTPELIER MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GRIFFITH BY 315 PM CDT...
  PALA ALTO BY 320 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 3381 8872 3380 8871 3369 8871 3368 8868
      3356 8877 3356 8880 3365 8904 3375 8904
      3376 8903 3376 8894 3382 8893
TIME...MOT...LOC 1947Z 284DEG 15KT 3374 8893

$$

BYB

1 follow-up statement

676 
WWUS54 KJAN 102008
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
308 PM CDT FRI AUG 10 2012

MSC025-102030-
/O.CON.KJAN.SV.W.0486.000000T0000Z-120810T2030Z/
CLAY MS-
308 PM CDT FRI AUG 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR WESTERN CLAY COUNTY...

AT 308 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
MONTPELIER MOVING SOUTHEAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GRIFFITH AND PALA ALTO BY 330 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 3381 8872 3380 8871 3369 8871 3359 8886
      3366 8903 3375 8904 3376 8903 3376 8894
      3382 8893
TIME...MOT...LOC 2008Z 302DEG 11KT 3370 8891

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:00 PM CDT	Special Weather Statement	JAN	Warren	30 min
Aug 9, 7:29 PM CDT	Special Weather Statement	JAN	Warren	31 min
Aug 9, 8:01 PM CDT	Special Weather Statement	JAN	Issaquena	29 min
Aug 9, 8:10 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Warren	23 min
Aug 9, 8:54 PM CDT	Special Weather Statement	JAN	Warren	31 min
Aug 10, 3:23 AM CDT	Special Weather Statement	JAN	Warren	47 min
Aug 10, 7:54 AM CDT	Special Weather Statement	JAN	Lincoln	46 min
Aug 10, 10:15 AM CDT	Special Weather Statement	JAN	Adams	45 min
Aug 10, 2:19 PM CDT	Special Weather Statement	JAN	Clay	46 min
Aug 10, 2:38 PM CDT	Special Weather Statement	JAN	Grenada	42 min
Aug 10, 3:33 PM CDT	Special Weather Statement	JAN	Clay	32 min
Aug 10, 4:08 PM CDT	Special Weather Statement	JAN	Franklin	32 min
Aug 10, 4:20 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Jefferson	55 min
Aug 10, 4:24 PM CDT	Special Weather Statement	JAN	Warren	31 min
Aug 10, 4:43 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin	32 min
Aug 10, 4:45 PM CDT	Special Weather Statement	JAN	Lauderdale	30 min
Aug 10, 4:49 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Hinds, Warren	56 min
Aug 10, 5:10 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin	65 min
Aug 10, 5:13 PM CDT	Special Weather Statement	JAN	Jefferson Davis	32 min
Aug 10, 5:30 PM CDT	Flash Flood Warning	JAN	Adams, Franklin	2 hr
Aug 10, 5:42 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Claiborne, Jefferson	63 min
Aug 10, 5:46 PM CDT	Special Weather Statement	JAN	Claiborne	29 min
Aug 10, 5:55 PM CDT	Special Weather Statement	JAN	Scott	30 min
Aug 10, 6:00 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Warren	45 min
Aug 10, 6:04 PM CDT	Severe Thunderstorm Warning	JAN	Adams	56 min
Aug 10, 6:10 PM CDT	Special Weather Statement	JAN	Covington	30 min
Aug 10, 6:22 PM CDT	Flash Flood Warning	JAN	Adams, Jefferson	79 min
Aug 10, 6:25 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin, Jefferson	37 min
Aug 10, 6:41 PM CDT	Special Weather Statement	JAN	Winston	29 min
Aug 10, 6:57 PM CDT	Special Weather Statement	JAN	Lauderdale	28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.