Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 190, NWS Mobile, AL

September 4, 2012Baldwin County, Escambia County, Alabama; Escambia County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Sep 4, 2012, 4:59 PM CDT for Baldwin County, Escambia County, Alabama; Escambia County, Florida. It was in force for 61 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: Sep 4, 2012, 4:59 PM CDT (21:59 UTC)
Expired: Sep 4, 2012, 6:00 PM CDT
In force: 61 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), 66 km from the middle of the area, began a volume at 22:02 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, 10.0 hours before the alert went out and 214 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: 1547 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

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

044 
WUUS54 KMOB 042159
SVRMOB
ALC003-053-FLC033-042300-
/O.NEW.KMOB.SV.W.0190.120904T2159Z-120904T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
459 PM CDT TUE SEP 4 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  WESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 600 PM CDT

* AT 457 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 9 MILES
  NORTHWEST OF ATMORE...OR 3 MILES WEST OF POARCH CREEK
  RESERVATION...AND MOVING SOUTH AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  POARCH CREEK RESERVATION...                 STAPLETON...
  I65 AND CR 47...      I65 AND AL 59...      I65 AND AL 287...
  BAY MINETTE...        MCCULLOUGH...         I65 AND CR 1...
  I65 AND AL 21...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 34 AND 61.

LAT...LON 3067 8746 3072 8790 3123 8774 3120 8741
TIME...MOT...LOC 2159Z 008DEG 23KT 3110 8760

$$

1 follow-up statement

655 
WWUS54 KMOB 042235
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
535 PM CDT TUE SEP 4 2012

ALC053-042245-
/O.CAN.KMOB.SV.W.0190.000000T0000Z-120904T2300Z/
ESCAMBIA AL-
535 PM CDT TUE SEP 4 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR WESTERN
ESCAMBIA COUNTY...

AT 530 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR WESTERN 
ESCAMBIA COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE SEVERE 
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3070 8768 3070 8772 3072 8790 3104 8780
      3101 8762 3100 8762 3099 8760 3100 8755
      3099 8750 3068 8751
TIME...MOT...LOC 2235Z 008DEG 23KT 3087 8764

$$

ALC003-FLC033-042300-
/O.CON.KMOB.SV.W.0190.000000T0000Z-120904T2300Z/
ESCAMBIA FL-BALDWIN AL-
535 PM CDT TUE SEP 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR CENTRAL BALDWIN AND NORTHWESTERN ESCAMBIA COUNTIES...

AT 530 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 8 MILES EAST OF
BAY MINETTE...OR 8 MILES SOUTH OF I65 AND CR 47...MOVING SOUTH AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
  STAPLETON...          I65 AND AL 59...      I65 AND AL 287...
  BAY MINETTE...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 34 AND 44.

LAT...LON 3070 8768 3070 8772 3072 8790 3104 8780
      3101 8762 3100 8762 3099 8760 3100 8755
      3099 8750 3068 8751
TIME...MOT...LOC 2235Z 008DEG 23KT 3087 8764

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 6:52 AM CDT	Areal Flood Advisory	MOB	Butler, Crenshaw	3 hr
Sep 4, 7:20 AM CDT	Areal Flood Advisory	MOB	Covington	3 hr
Sep 4, 7:30 AM CDT	Flash Flood Warning	MOB	Butler, Crenshaw	6 hr
Sep 4, 8:12 AM CDT	Flash Flood Watch	MOB	Butler, Clarke, Conecuh, Covington, Crenshaw, Escambia and 2 more	25 hr
Sep 4, 8:26 AM CDT	Flash Flood Warning	MOB	Butler, Covington, Crenshaw	6 hr
Sep 4, 9:10 AM CDT	Flash Flood Warning	MOB	Wilcox	6 hr
Sep 4, 10:13 AM CDT	Areal Flood Advisory	MOB	Clarke, Conecuh, Monroe	3 hr
Sep 4, 11:40 AM CDT	Flash Flood Warning	MOB	Butler, Conecuh, Monroe	3 hr
Sep 4, 1:33 PM CDT	Areal Flood Warning	MOB	Butler, Crenshaw	3 hr
Sep 4, 2:14 PM CDT	Areal Flood Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Monroe, Wilcox	2 hr
Sep 4, 3:34 PM CDT	Flash Flood Warning	MOB	Baldwin, Clarke, Conecuh, Escambia, Monroe	6 hr
Sep 4, 3:44 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	61 min
Sep 4, 4:26 PM CDT	Areal Flood Warning	MOB	Conecuh, Monroe	8 hr
Sep 4, 4:44 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	61 min
Sep 4, 5:51 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	54 min
Sep 4, 5:56 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Monroe, Washington, Wilcox	64 min
Sep 4, 6:37 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	30 min
Sep 4, 6:49 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Choctaw, Clarke, Escambia, Mobile, Monroe and 2 more	34 min
Sep 4, 10:44 AM CDT	Areal Flood Advisory	MOB	Okaloosa	2 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 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.