Alert archive / Mississippi / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 596, NWS Jackson, MS

August 4, 2011Carroll County, Grenada County, Montgomery County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 4, 2011, 7:34 PM CDT for Carroll County, Grenada County, Montgomery County, Mississippi. It was in force for 41 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 4, 2011, 7:34 PM CDT (00:34 UTC)
Expired: Aug 4, 2011, 8:15 PM CDT
In force: 41 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Carroll County, MS, Grenada County, MS, Montgomery County, MS

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 4, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.6 hours before the alert went out and 124 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: 3756 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

556 
WUUS54 KJAN 050034
SVRJAN
MSC015-043-097-050115-
/O.NEW.KJAN.SV.W.0596.110805T0034Z-110805T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
734 PM CDT THU AUG 4 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CARROLL COUNTY IN NORTH CENTRAL MISSISSIPPI...
  GRENADA COUNTY IN NORTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF GRENADA...
  NORTHERN MONTGOMERY COUNTY IN NORTH CENTRAL MISSISSIPPI...

* UNTIL 815 PM CDT

* AT 734 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR GORE SPRINGS MOVING SOUTH
  AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ELLIOTT...MISTERTON...JEFFERSON...DUCK HILL AND SWEATMAN.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
THURSDAY EVENING FOR NORTHEASTERN MISSISSIPPI.

&&

LAT...LON 3387 8951 3372 8950 3357 8951 3357 8993
      3386 8992
TIME...MOT...LOC 0034Z 348DEG 11KT 3376 8968

$$

DL

1 follow-up statement

600 
WWUS54 KJAN 050112
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
812 PM CDT THU AUG 4 2011

MSC015-043-097-050122-
/O.EXP.KJAN.SV.W.0596.000000T0000Z-110805T0115Z/
MONTGOMERY MS-GRENADA MS-CARROLL MS-
812 PM CDT THU AUG 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CARROLL...
GRENADA AND NORTHERN MONTGOMERY COUNTIES WILL EXPIRE AT 815 PM CDT...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS WEAKENED
BELOW SEVERE LIMITS AND THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
THURSDAY EVENING FOR NORTHEASTERN MISSISSIPPI.

LAT...LON 3387 8951 3372 8950 3357 8951 3357 8993
      3386 8992
TIME...MOT...LOC 0112Z 348DEG 11KT 3365 8965

$$

DL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 7:03 PM CDT	Special Weather Statement	JAN	Grenada	32 min
Aug 4, 7:11 PM CDT	Special Weather Statement	JAN	Choctaw, Oktibbeha	29 min
Aug 4, 7:13 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Noxubee, Oktibbeha, Winston	47 min
Aug 4, 7:47 PM CDT	Special Weather Statement	JAN	Kemper	28 min
Aug 4, 7:51 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Noxubee	54 min
Aug 4, 8:07 PM CDT	Special Weather Statement	JAN	Lauderdale	43 min
Aug 4, 10:41 PM CDT	Special Weather Statement	JAN	Forrest	29 min
Aug 5, 3:07 PM CDT	Special Weather Statement	JAN	Grenada	28 min
Aug 5, 4:04 PM CDT	Special Weather Statement	JAN	Clay, Webster	31 min
Aug 5, 4:16 PM CDT	Special Weather Statement	JAN	Lowndes	29 min
Aug 5, 4:38 PM CDT	Special Weather Statement	JAN	Hinds	27 min
Aug 5, 4:43 PM CDT	Special Weather Statement	JAN	Winston	27 min
Aug 5, 4:56 PM CDT	Special Weather Statement	JAN	Lowndes, Oktibbeha	29 min
Aug 5, 5:13 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes, Noxubee	62 min
Aug 5, 5:21 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Neshoba, Winston	54 min
Aug 5, 6:14 PM CDT	Special Weather Statement	JAN	Kemper	31 min
Aug 5, 6:29 PM CDT	Special Weather Statement	JAN	Neshoba	31 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2011 Every severe thunderstorm warning in 2011

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.