Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 172, NWS Mobile, AL

July 2, 2011Escambia County, Florida; Baldwin County, Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 2, 2011, 1:12 PM CDT for Escambia County, Florida; Baldwin County, Escambia County, Alabama. It was in force for 26 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: Jul 2, 2011, 1:12 PM CDT (18:12 UTC)
Expired: Jul 2, 2011, 1:38 PM CDT
In force: 26 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Baldwin County, AL, Escambia County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 65 km from the middle of the area, began a volume at 18:12 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
Jul 2, 1:20 PM CDT	TSTM WND DMG	Nokomis, AL	MINOR DAMAGE TO MOBILE HOMES. TRESS AND POWER LINES DOWN.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.2 hours before the alert went out and 212 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: 2612 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 17 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.

928 
WUUS54 KMOB 021812
SVRMOB
ALC003-053-FLC033-021900-
/O.NEW.KMOB.SV.W.0172.110702T1812Z-110702T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
112 PM CDT SAT JUL 2 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  SOUTHWESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF ATMORE...
  NORTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 200 PM CDT

* AT 112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  WEST OF ATMORE...OR NEAR PERDIDO...AND MOVING SOUTHWEST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO I65
  AND CR 47 AND I65 AND AL 287

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 36 AND 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3082 8769 3102 8784 3114 8755 3099 8743
TIME...MOT...LOC 1813Z 059DEG 5KT 3101 8759

$$

1 follow-up statement

977 
WWUS54 KMOB 021838
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
138 PM CDT SAT JUL 2 2011

ALC003-053-FLC033-021848-
/O.CAN.KMOB.SV.W.0172.000000T0000Z-110702T1900Z/
ESCAMBIA AL-BALDWIN AL-ESCAMBIA FL-
138 PM CDT SAT JUL 2 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ESCAMBIA... 
NORTHERN BALDWIN AND SOUTHWESTERN ESCAMBIA COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. 

LAT...LON 3082 8769 3102 8784 3114 8755 3099 8743
TIME...MOT...LOC 1838Z 059DEG 5KT 3099 8762

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 1:01 PM CDT	Severe Thunderstorm Warning	MOB	Santa Rosa	44 min
Jul 2, 1:16 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa	44 min
Jul 2, 12:59 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	31 min
Jul 2, 1:03 PM CDT	Special Marine Warning	MOB		42 min
Jul 2, 1:55 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	35 min
Jul 2, 2:28 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	31 min
Jul 2, 2:37 PM CDT	Areal Flood Advisory	MOB	Baldwin	53 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.