Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 164, NWS Mobile, AL

July 31, 2012Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Jul 31, 2012, 4:38 PM CDT for Wayne County, Mississippi. It was in force for 52 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: Jul 31, 2012, 4:38 PM CDT (21:38 UTC)
Expired: Jul 31, 2012, 5:30 PM CDT
In force: 52 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Wayne County, MS

The radar

The Mobile radar (KMOB), 110 km from the middle of the area, began a volume at 21:40 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.6 hours before the alert went out and 153 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: 2212 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 999 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

192 
WUUS54 KMOB 312138
SVRMOB
MSC153-312230-
/O.NEW.KMOB.SV.W.0164.120731T2138Z-120731T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
438 PM CDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 530 PM CDT

* AT 435 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 8 MILES WEST
  OF WAYNESBORO...OR 10 MILES NORTHWEST OF CLARA...AND MOVING SOUTH
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         CLARA...

LAT...LON 3144 8857 3143 8886 3179 8890 3182 8868
TIME...MOT...LOC 2139Z 347DEG 20KT 3168 8877

$$

2 follow-up statements

319 
WWUS54 KMOB 312159
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
459 PM CDT TUE JUL 31 2012

MSC153-312230-
/O.CON.KMOB.SV.W.0164.000000T0000Z-120731T2230Z/
WAYNE MS-
459 PM CDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR CENTRAL WAYNE COUNTY...

AT 458 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 9 MILES
SOUTHWEST OF WAYNESBORO...OR 5 MILES WEST OF CLARA...MOVING SOUTH AT
20 MPH.

LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         CLARA...

LAT...LON 3174 8865 3171 8865 3171 8864 3144 8857
      3143 8886 3171 8889
TIME...MOT...LOC 2200Z 354DEG 17KT 3159 8878

$$

278 
WWUS54 KMOB 312225
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
525 PM CDT TUE JUL 31 2012

MSC153-312235-
/O.EXP.KMOB.SV.W.0164.000000T0000Z-120731T2230Z/
WAYNE MS-
525 PM CDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
CENTRAL WAYNE COUNTY...

AT 521 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR CENTRAL WAYNE
COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE SEVERE
THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 530 PM CDT.

LAT...LON 3174 8865 3171 8865 3171 8864 3144 8857
      3143 8886 3171 8889
TIME...MOT...LOC 2225Z 354DEG 17KT 3147 8877

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:22 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	23 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.