Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 150, NWS Mobile, AL

July 30, 2012Escambia County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 30, 2012, 2:41 PM CDT for Escambia County, Florida. It was in force for 49 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 30, 2012, 2:41 PM CDT (19:41 UTC)
Expired: Jul 30, 2012, 3:30 PM CDT
In force: 49 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Escambia County, FL

The radar

The Mobile radar (KMOB), 98 km from the middle of the area, began a volume at 19:41 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 231 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: 3604 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 631 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -4.2

Open this sounding in Storm Lab

The text

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

176 
WUUS54 KMOB 301941
SVRMOB
FLC033-302030-
/O.NEW.KMOB.SV.W.0150.120730T1941Z-120730T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
241 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL ESCAMBIA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 330 PM CDT

* AT 236 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 4 MILES
  SOUTHWEST OF WARRINGTON...OR 7 MILES SOUTHEAST OF LILLIAN...AND
  MOVING SOUTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WARRINGTON...

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.

&&

LAT...LON 3039 8742 3043 8725 3039 8723 3038 8726
      3033 8726 3033 8720 3032 8720 3031 8725
      3032 8731 3029 8741
TIME...MOT...LOC 1941Z 345DEG 10KT 3034 8733

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:28 AM CDT	Heat Advisory	MOB		5 hr
Jul 30, 1:49 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	41 min
Jul 30, 2:12 PM CDT	Areal Flood Advisory	MOB	Escambia, Okaloosa, Santa Rosa	2 hr
Jul 30, 2:29 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	46 min
Jul 30, 2:49 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	56 min
Jul 30, 3:04 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	56 min
Jul 30, 3:15 PM CDT	Areal Flood Advisory	MOB	Okaloosa	2 hr
Jul 30, 5:21 PM CDT	Severe Thunderstorm Warning	MOB	Santa Rosa	54 min

Nearby

Severe Thunderstorm Warnings in Florida, 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.