Alert archive / Mississippi / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 621, NWS Jackson, MS

August 13, 2011Copiah County, Hinds County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 13, 2011, 7:26 PM CDT for Copiah County, Hinds County, Mississippi. It was in force for 33 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: Aug 13, 2011, 7:26 PM CDT (00:26 UTC)
Expired: Aug 13, 2011, 7:59 PM CDT
In force: 33 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Copiah County, MS, Hinds County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 57 km from the middle of the area, began a volume at 00:28 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
Aug 13, 7:32 PM CDT	TSTM WND DMG	2 N Crystal Springs, MS	A FEW TREES WERE BLOWN DOWN

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

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.4 hours before the alert went out and 56 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: 1264 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 97 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.

713 
WUUS54 KJAN 140026
SVRJAN
MSC029-049-140130-
/O.NEW.KJAN.SV.W.0621.110814T0026Z-110814T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
726 PM CDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COPIAH COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...HAZLEHURST...CRYSTAL SPRINGS...
  SOUTHERN HINDS COUNTY IN CENTRAL MISSISSIPPI...

* UNTIL 830 PM CDT

* AT 725 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM DRY GROVE TO GALLMAN TO 8 MILES SOUTH OF BARLOW MOVING
  SOUTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GLANCY...MARTINSVILLE...TERRY...WESSON...HOPEWELL AND ROCKPORT

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.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
TALLULAH PARISH AND WARREN COUNTY...PARTICULARLY VICKSBURG! THIS IS 
AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 3169 9038 3170 9041 3170 9057 3180 9073
      3198 9063 3224 9060 3212 9024 3205 9023
      3203 9025 3202 9022 3194 9020 3189 9014
      3180 9015 3179 9011 3175 9013 3170 9026
      3170 9037
TIME...MOT...LOC 0025Z 302DEG 23KT 3215 9046 3194 9045
          3171 9068

$$

BYB

1 follow-up statement

164 
WWUS54 KJAN 140059
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
759 PM CDT SAT AUG 13 2011

MSC029-049-140108-
/O.CAN.KJAN.SV.W.0621.000000T0000Z-110814T0130Z/
HINDS MS-COPIAH MS-
759 PM CDT SAT AUG 13 2011

...THE SEVERE THUNDERSTORM WARNING FOR COPIAH AND SOUTHERN HINDS
COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS WEAKENED 
BELOW SEVERE LIMITS. THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF 
SOUTHERN HINDS COUNTY AND MUCH OF COPIAH COUNTY FOR THE NEXT HOUR OR 
SO. WIND GUSTS UP TO 45 MPH WILL BE POSSIBLE WITH THIS ACTIVITY...AS 
WELL AS HEAVY RAIN...BUT THE STORMS ARE NO LONGER CONSIDERED SEVERE.

LAT...LON 3169 9038 3170 9041 3170 9057 3180 9073
      3198 9063 3224 9060 3212 9024 3205 9023
      3203 9025 3202 9022 3194 9020 3189 9014
      3180 9015 3179 9011 3175 9013 3170 9026
      3170 9037
TIME...MOT...LOC 0058Z 302DEG 23KT 3204 9025 3183 9024
          3160 9047

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:05 PM CDT	Special Weather Statement	JAN	Lincoln	45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.