Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 174, NWS Mobile, AL

July 2, 2011Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 2, 2011, 1:55 PM CDT for Baldwin County, Alabama. It was in force for 35 min. 4 reports 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, 1:55 PM CDT (18:55 UTC)
Expired
Jul 2, 2011, 2:30 PM CDT
In force
35 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 40 km from the middle of the area, began a volume at 18:57 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

TimeReportWhereRemark
Jul 2, 2:05 PM CDTTSTM WND DMG2 Nnw Loxley, ALTHE MAIN ROOF OF THE EXXON STATION ON HWY 59 COLLAPSED. TIME ESTIMATED BY RADAR.
Jul 2, 2:05 PM CDTHAIL 12 Nnw Loxley, ALQUARTER SIZE HAIL ON HWY 59 NEAR I-10.
Jul 2, 2:15 PM CDTHAIL 0.25Loxley, ALLOXLEY POLICE REPORTED PEA SIZE HAIL IN LOXLEY.
Jul 2, 2:15 PM CDTHAIL 0.752 Sw Malbis, ALPENNY SIZE HAIL REPORTED NEAR MALBIS

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, 6.9 hours before the alert went out and 185 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2011-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2612 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2011-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

252 
WUUS54 KMOB 021855
SVRMOB
ALC003-021930-
/O.NEW.KMOB.SV.W.0174.110702T1855Z-110702T1930Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...SPANISH FORT...ROBERTSDALE...
  LOXLEY...DAPHNE...

* UNTIL 230 PM CDT

* AT 153 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 NEAR
  LOXLEY...OR 7 MILES SOUTH OF STAPLETON. THIS STORM WAS NEARLY      
  STATIONARY. OTHER STRONG THUNDERSTORMS ARE DEVELOPING IN THE       
  VICINITY OF THE WARNED STORM AND COULD ALSO QUICKLY BECOME SEVERE. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SILVERHILL

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 34 AND 52.

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 3055 8791 3065 8794 3074 8792 3074 8761
      3052 8765
TIME...MOT...LOC 1855Z 011DEG 1KT 3064 8781

$$
2 follow-up statements
824 
WWUS54 KMOB 021913
SVSMOB

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

ALC003-021930-
/O.CON.KMOB.SV.W.0174.000000T0000Z-110702T1930Z/
BALDWIN AL-
213 PM CDT SAT JUL 2 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR CENTRAL BALDWIN COUNTY...

AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR LOXLEY...MOVING SOUTHEAST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
SILVERHILL...ROSINTON AND ROBERTSDALE.

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 3055 8790 3064 8789 3071 8788 3074 8761
      3052 8765
TIME...MOT...LOC 1913Z 321DEG 5KT 3062 8777

$$
318 
WWUS54 KMOB 021929
SVSMOB

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

ALC003-021940-
/O.EXP.KMOB.SV.W.0174.000000T0000Z-110702T1930Z/
BALDWIN AL-
229 PM CDT SAT JUL 2 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BALDWIN COUNTY HAS
EXPIRED...

LAT...LON 3055 8790 3064 8789 3071 8788 3074 8761
      3052 8765
TIME...MOT...LOC 1930Z 321DEG 5KT 3060 8775

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 12:59 PM CDTSevere Thunderstorm WarningMOBMobile31 min
Jul 2, 1:03 PM CDTSpecial Marine WarningMOB42 min
Jul 2, 1:12 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia26 min
Jul 2, 2:28 PM CDTSevere Thunderstorm WarningMOBMobile31 min
Jul 2, 2:37 PM CDTAreal Flood AdvisoryMOBBaldwin53 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011Every 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.