Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 168, NWS Mobile, AL

August 3, 2012Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 3, 2012, 3:33 PM CDT for Mobile County, Alabama. It was in force for 42 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
Aug 3, 2012, 3:33 PM CDT (20:33 UTC)
Expired
Aug 3, 2012, 4:15 PM CDT
In force
42 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 12 km from the middle of the area, began a volume at 20:33 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, 8.6 hours before the alert went out and 159 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 2012-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4172 joules per kilogram.LCLEL10008507005003002001001 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 2012-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -74 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
4172 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-74 m²/s²
0-3 km storm-relative helicity
-37 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.

151 
WUUS54 KMOB 032033
SVRMOB
ALC097-032115-
/O.NEW.KMOB.SV.W.0168.120803T2033Z-120803T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
333 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 415 PM CDT

* AT 331 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED NEAR MIDTOWN
  MOBILE...OR 4 MILES SOUTH OF I65 AND US 45...AND MOVING NORTHWEST
  AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WEST MOBILE...        MIDTOWN MOBILE...     DOWNTOWN MOBILE...
  SEMMES...             PRICHARD...           I65 AND US 45...
  I65 AND I165...       I65 AND AL 158...     I10 AND I65...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 18 AND 28. THIS
INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

&&

LAT...LON 3068 8834 3088 8818 3077 8802 3075 8803
      3074 8801 3071 8801 3057 8810
TIME...MOT...LOC 2033Z 126DEG 5KT 3069 8813

$$
1 follow-up statement
544 
WWUS54 KMOB 032059
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
359 PM CDT FRI AUG 3 2012

ALC097-032115-
/O.CON.KMOB.SV.W.0168.000000T0000Z-120803T2115Z/
MOBILE AL-
359 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR CENTRAL MOBILE COUNTY...

AT 354 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 2 MILES
NORTHWEST OF MIDTOWN MOBILE...OR 4 MILES SOUTHWEST OF I65 AND US
45...MOVING NORTHWEST AT 5 MPH.

LOCATIONS IMPACTED INCLUDE...
  WEST MOBILE...        MIDTOWN MOBILE...     DOWNTOWN MOBILE...
  SEMMES...             PRICHARD...           I65 AND US 45...
  I65 AND I165...       I65 AND AL 158...     I10 AND I65...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 18 AND 28. THIS
INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

&&

LAT...LON 3068 8834 3088 8818 3077 8802 3075 8803
      3074 8801 3071 8801 3057 8810
TIME...MOT...LOC 2059Z 126DEG 5KT 3071 8816

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 3:22 PM CDTAreal Flood AdvisoryMOBMobile113 min
Aug 3, 4:20 PM CDTSevere Thunderstorm WarningMOBCovington25 min
Aug 3, 4:40 PM CDTSevere Thunderstorm WarningMOBButler, Conecuh35 min
Aug 3, 5:12 PM CDTSevere Thunderstorm WarningMOBWashington20 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Every 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.