Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 608, NWS Jackson, MS

December 20, 2012Copiah County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Dec 20, 2012, 5:01 AM CST for Copiah County, Mississippi. It was in force for 59 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: Dec 20, 2012, 5:01 AM CST (11:01 UTC)
Expired: Dec 20, 2012, 6:00 AM CST
In force: 59 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Copiah County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 57 km from the middle of the area, began a volume at 11:03 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
Dec 20, 5:35 AM CST	TSTM WND DMG	Crystal Springs, MS	TREES DOWN

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Dec 20, 4:23 AM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 11.0 hours before the alert went out and 57 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1606 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 246 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.

719 
WUUS54 KJAN 201101
SVRJAN
MSC029-201200-
/O.NEW.KJAN.SV.W.0608.121220T1101Z-121220T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
501 AM CST THU DEC 20 2012

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...

* UNTIL 600 AM CST

* AT 501 AM CST...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 10 MILES NORTHEAST OF CARPENTER TO 18 MILES WEST OF ALLEN
  MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  DENTVILLE BY 510 AM CST...
  ALLEN AND BARLOW BY 515 AM CST...
  ALLEN AND CRYSTAL SPRINGS BY 520 AM CST...
  GALLMAN...GLANCY AND HAZLEHURST BY 525 AM CST...
  MARTINSVILLE BY 530 AM CST...
  HOPEWELL BY 535 AM CST...

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 TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
MISSISSIPPI.

&&

LAT...LON 3170 9041 3170 9074 3205 9071 3205 9023
      3203 9025 3202 9022 3194 9020 3193 9017
      3187 9014 3184 9016 3183 9014 3180 9015
      3179 9011 3177 9011 3170 9026 3170 9037
      3169 9038
TIME...MOT...LOC 1101Z 273DEG 46KT 3214 9052 3175 9092

$$

JA

1 follow-up statement

711 
WWUS54 KJAN 201148
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
548 AM CST THU DEC 20 2012

MSC029-201200-
/O.CON.KJAN.SV.W.0608.000000T0000Z-121220T1200Z/
COPIAH MS-
548 AM CST THU DEC 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM CST
FOR COPIAH COUNTY...

AT 548 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 14 MILES NORTHEAST OF HOPEWELL TO WESSON MOVING EAST AT 55 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ROCKPORT BY 555 AM CST...

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 TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
MISSISSIPPI. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL
700 AM CST THURSDAY MORNING FOR NORTHEAST LOUISIANA AND WESTERN
MISSISSIPPI.

&&

LAT...LON 3171 9063 3205 9044 3205 9023 3203 9025
      3202 9022 3194 9020 3193 9017 3187 9014
      3184 9016 3183 9014 3180 9015 3179 9011
      3177 9011 3170 9026 3169 9038
TIME...MOT...LOC 1148Z 273DEG 46KT 3209 8999 3171 9040

$$

JA

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 2:14 AM CST	Special Weather Statement	JAN	Kemper	31 min
Dec 20, 2:59 AM CST	Severe Thunderstorm Warning	JAN	Bolivar, Washington	76 min
Dec 20, 3:23 AM CST	Special Weather Statement	JAN	Madison	32 min
Dec 20, 3:42 AM CST	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Warren	78 min
Dec 20, 3:45 AM CST	Severe Thunderstorm Warning	JAN	Humphreys, Leflore, Sunflower	45 min
Dec 20, 3:59 AM CST	Tornado Warning	JAN	Madison	26 min
Dec 20, 4:18 AM CST	Severe Thunderstorm Warning	JAN	Holmes, Yazoo	72 min
Dec 20, 4:22 AM CST	Tornado Warning	JAN	Attala, Leake	34 min
Dec 20, 4:25 AM CST	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore, Montgomery	80 min
Dec 20, 4:34 AM CST	Severe Thunderstorm Warning	JAN	Adams, Claiborne, Franklin, Jefferson	71 min
Dec 20, 4:48 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Madison	57 min
Dec 20, 4:56 AM CST	Special Weather Statement	JAN	Simpson	29 min
Dec 20, 5:08 AM CST	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Webster	67 min
Dec 20, 5:16 AM CST	Severe Thunderstorm Warning	JAN	Leake, Rankin, Scott	74 min
Dec 20, 5:24 AM CST	Severe Thunderstorm Warning	JAN	Lincoln	66 min
Dec 20, 5:26 AM CST	Severe Thunderstorm Warning	JAN	Jasper, Smith	34 min
Dec 20, 5:27 AM CST	Severe Thunderstorm Warning	JAN	Marion	48 min
Dec 20, 5:38 AM CST	Tornado Warning	JAN	Marion	37 min
Dec 20, 5:44 AM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Simpson	76 min
Dec 20, 5:53 AM CST	Severe Thunderstorm Warning	JAN	Clay, Oktibbeha, Winston	52 min
Dec 20, 5:56 AM CST	Special Weather Statement	JAN	Kemper, Noxubee	29 min
Dec 20, 5:58 AM CST	Severe Thunderstorm Warning	JAN	Neshoba, Newton	62 min
Dec 20, 5:59 AM CST	Severe Thunderstorm Warning	JAN	Covington, Lamar	46 min
Dec 20, 6:00 AM CST	Severe Thunderstorm Warning	JAN	Jasper, Smith	75 min
Dec 20, 6:17 AM CST	Severe Thunderstorm Warning	JAN	Lauderdale	43 min
Dec 20, 6:18 AM CST	Severe Thunderstorm Warning	JAN	Lamar, Marion	42 min
Dec 20, 6:20 AM CST	Severe Thunderstorm Warning	JAN	Lowndes, Noxubee	40 min
Dec 20, 6:23 AM CST	Severe Thunderstorm Warning	JAN	Covington, Jones	82 min
Dec 20, 6:33 AM CST	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale	57 min
Dec 20, 6:38 AM CST	Severe Thunderstorm Warning	JAN	Forrest	37 min
Dec 20, 6:48 AM CST	Severe Thunderstorm Warning	JAN	Lamar, Marion	57 min
Dec 20, 6:51 AM CST	Severe Thunderstorm Warning	JAN	Clarke, Lauderdale	54 min
Dec 20, 6:59 AM CST	Severe Thunderstorm Warning	JAN	Lowndes, Noxubee	19 min
Dec 20, 7:12 AM CST	Severe Thunderstorm Warning	JAN	Forrest	48 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.