Alert archive / Mississippi / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 5, NWS Mobile, AL

February 20, 2014Greene County, Perry County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 20, 2014, 11:44 PM CST for Greene County, Perry County, Mississippi. It was in force for 61 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, 11:44 PM CST (05:44 UTC)
Expired: Feb 21, 2014, 12:45 AM CST
In force: 61 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 05:44 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.7 hours before the alert went out and 127 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: 1934 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

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

951 
WUUS54 KMOB 210544
SVRMOB
MSC041-111-210645-
/O.NEW.KMOB.SV.W.0005.140221T0544Z-140221T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1144 PM CST THU FEB 20 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  CENTRAL PERRY COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 1245 AM CST

* AT 1143 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 8 MILES SOUTHWEST OF RICHTON TO
  16 MILES NORTH OF WIGGINS TO 20 MILES NORTHWEST OF WIGGINS...AND
  MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MCLAIN...             LEAKESVILLE...        NEW AUGUSTA...
  BEAUMONT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

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

&&

LAT...LON 3127 8915 3136 8844 3100 8842 3100 8883
      3099 8884 3099 8915
TIME...MOT...LOC 0544Z 270DEG 28KT 3127 8903 3109 8914
          3101 8941

$$

JP

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, 10:57 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	78 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

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.