Alert archive / Mississippi / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 4, NWS Mobile, AL

February 20, 2014Greene County, Perry County, Wayne County, Mississippi; Choctaw County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 20, 2014, 10:57 PM CST for Greene County, Perry County, Wayne County, Mississippi; Choctaw County, Washington County, Alabama. It was in force for 78 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: Feb 20, 2014, 10:57 PM CST (04:57 UTC)
Expired: Feb 21, 2014, 12:15 AM CST
In force: 78 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Washington County, AL, Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 117 km from the middle of the area, began a volume at 04:58 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 watch it was issued in

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

Issued	Product	Office	Lasted
Feb 20, 6:05 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 5.0 hours before the alert went out and 166 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: 384 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1582 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

964 
WUUS54 KMOB 210457
SVRMOB
ALC023-129-MSC041-111-153-210615-
/O.NEW.KMOB.SV.W.0004.140221T0457Z-140221T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1057 PM CST THU FEB 20 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1215 AM CST

* AT 1053 PM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES EAST OF QUITMAN TO 12
  MILES NORTH OF RICHTON TO 7 MILES SOUTHEAST OF PETAL...AND MOVING
  EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         STATE LINE...         CLARA...
  BUCKATUNNA...         RICHTON...            TOXEY...
  SILAS...              NEEDHAM...            GILBERTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3144 8899 3144 8895 3147 8895 3150 8890
      3184 8876 3189 8849 3206 8846 3210 8809
      3205 8811 3196 8809 3195 8812 3191 8809
      3190 8813 3182 8818 3175 8815 3176 8810
      3170 8809 3138 8810 3125 8915 3132 8915
TIME...MOT...LOC 0457Z 256DEG 30KT 3201 8854 3152 8883
          3128 8913

$$

1 follow-up statement

500 
WWUS54 KMOB 210542
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1142 PM CST THU FEB 20 2014

ALC023-129-MSC041-111-153-210615-
/O.CON.KMOB.SV.W.0004.000000T0000Z-140221T0615Z/
CHOCTAW AL-WASHINGTON AL-WAYNE MS-PERRY MS-GREENE MS-
1142 PM CST THU FEB 20 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CST
FOR NORTHERN GREENE...NORTHERN PERRY...WAYNE...NORTHWESTERN
WASHINGTON AND SOUTHERN CHOCTAW COUNTIES...

AT 1139 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM MORGAN CHAPEL TO SHADY GROVE
TO SAND HILL...OR ALONG A LINE EXTENDING FROM BUTLER TO 13 MILES EAST
OF WAYNESBORO TO 10 MILES EAST OF RICHTON...MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BOLINGER...SILAS...WIMBLY...BUCKATUNNA...CHAPPELL HILL...BELMONT...
PLEASANT HILL...DUNBAR...LOU...BARRYTOWN...THORNTON SPRINGS...
MEHAFFEY...CARSON CITY...COLLUMBURG...ARARAT...FLATWOOD...BATTLES...
WOMACK HILL...HEALING SPRINGS...SPRING HILL...RESCUEVILLE...
COPELAND...SLATER...MILLRY...KITTRELL...OLD AVERA...BLADON SPRINGS...
ERET...BASHI...KOENTON...KNOBTOWN...BARLOW...FITEE...LOPER...SILVER
CROSS...STATE LINE...ELLISVILLE...CARPENTER...RUTAN...LATON HILL...
HOBSON...YELLOW PINE...YARBO...JORDAN...FRANKVILLE...CHATOM AND
BIGBEE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3144 8899 3144 8895 3147 8895 3150 8890
      3184 8876 3189 8849 3206 8846 3210 8809
      3205 8811 3196 8809 3195 8812 3191 8809
      3190 8813 3182 8818 3175 8815 3176 8810
      3170 8809 3138 8810 3125 8915 3132 8915
TIME...MOT...LOC 0541Z 256DEG 30KT 3207 8819 3165 8842
          3137 8876

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 20, 6:00 PM CST	Tornado Warning	MOB	Wayne	45 min
Feb 20, 9:42 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	78 min
Feb 20, 10:31 PM CST	Areal Flood Advisory	MOB	Greene, Perry, Wayne	3 hr
Feb 20, 11:44 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry	61 min
Feb 21, 12:10 AM CST	Severe Thunderstorm Warning	MOB	Greene, Wayne	80 min
Feb 21, 12:34 AM CST	Areal Flood Advisory	MOB	Greene, Wayne	116 min
Feb 21, 12:59 AM CST	Areal Flood Advisory	MOB	George, Greene, Perry, Stone	2 hr
Feb 21, 1:48 AM CST	Areal Flood Advisory	MOB	George	117 min
Feb 21, 3:04 AM CST	Wind Advisory	MOB	George, Greene, Perry, Stone, Wayne	6 hr
Feb 21, 11:33 AM CST	River Flood Warning	MOB	George, Greene, Perry	4 days
Feb 21, 11:33 AM CST	River Flood Warning	MOB	George, Greene, Wayne	4 days
Feb 20, 7:51 PM CST	Marine Dense Fog Advisory	MOB		7 hr
Feb 20, 7:55 PM CST	Tornado Warning	MOB	Clarke, Washington	35 min
Feb 20, 8:27 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	63 min
Feb 21, 1:04 AM CST	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Wilcox	41 min
Feb 21, 1:52 AM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	53 min
Feb 21, 1:57 AM CST	Special Marine Warning	MOB		93 min
Feb 21, 2:34 AM CST	Severe Thunderstorm Warning	MOB	Baldwin	56 min
Feb 21, 2:46 AM CST	Areal Flood Advisory	MOB	Butler, Conecuh, Escambia, Monroe	119 min
Feb 21, 3:37 AM CST	Areal Flood Advisory	MOB	Baldwin, Butler, Conecuh, Covington, Crenshaw, Escambia	113 min
Feb 21, 3:54 AM CST	Areal Flood Advisory	MOB	Baldwin	2 hr
Feb 21, 3:54 AM CST	Special Marine Warning	MOB		96 min
Feb 21, 4:30 AM CST	Special Marine Warning	MOB		90 min
Feb 21, 4:42 AM CST	Special Marine Warning	MOB		93 min
Feb 21, 5:25 AM CST	Special Marine Warning	MOB		95 min
Feb 21, 10:46 AM CST	River Flood Warning	MOB	Choctaw, Clarke, Washington	3 days

Nearby

Severe Thunderstorm Warnings in Mississippi, 2014 Severe Thunderstorm Warnings in Alabama, 2014 Every severe thunderstorm warning in 2014

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.