Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 71, NWS Mobile, AL

May 30, 2012Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 30, 2012, 2:54 PM CDT for Mobile County, Alabama. It was in force for 66 min. 2 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: May 30, 2012, 2:54 PM CDT (19:54 UTC)
Expired: May 30, 2012, 4:00 PM CDT
In force: 66 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 4 km from the middle of the area, began a volume at 19:55 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
May 30, 3:00 PM CDT	HAIL 1	Tillmans Corner, AL	QUARTER SIZE HAIL REPORTED IN TILLMANS CORNER.
May 30, 3:20 PM CDT	HAIL 1.25	6 Sw Downtown Mobile, AL	HALF DOLLAR SIZE HAIL REPORTED ON LAKESIDE DRIVE IN MOBILE.

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, 7.9 hours before the alert went out and 147 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: 1642 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 674 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 23 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.

786 
WUUS54 KMOB 301954
SVRMOB
ALC097-302100-
/O.NEW.KMOB.SV.W.0071.120530T1954Z-120530T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
254 PM CDT WED MAY 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 400 PM CDT

* AT 250 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 2 MILES
  SOUTHWEST OF TILLMANS CORNER...OR 8 MILES SOUTHWEST OF I10 AND I65.
  WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  TILLMANS CORNER...    THEODORE...           TANNER WILLIAMS...
  I10 AND I65...        FOREST HILL...        MOBILE...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 9 AND 20. THIS
INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 7.

LAT...LON 3073 8833 3073 8809 3051 8814 3050 8827
TIME...MOT...LOC 1954Z 180DEG 1KT 3056 8822

$$

1 follow-up statement

109 
WWUS54 KMOB 302006
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
306 PM CDT WED MAY 30 2012

ALC097-302100-
/O.CON.KMOB.SV.W.0071.000000T0000Z-120530T2100Z/
MOBILE AL-
306 PM CDT WED MAY 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR CENTRAL MOBILE COUNTY...

AT 300 PM CDT...A STORM SPOTTER REPORTED QUARTER SIZED HAIL IN 
TILLMANS CORNER. 

AT 305 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER 
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED NEAR TILLMANS 
CORNER...OR 6 MILES SOUTHWEST OF I10 AND I65. THIS STORM WAS LOCATED 
NEARLY STATIONARY.

LOCATIONS IMPACTED INCLUDE...
  TILLMANS CORNER...    THEODORE...           TANNER WILLIAMS...
  I10 AND I65...        FOREST HILL...        MOBILE...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 9 AND 20. THIS
INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 7.

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 3073 8833 3073 8809 3051 8814 3050 8827
TIME...MOT...LOC 2005Z 180DEG 0KT 3056 8822

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 9:32 PM CDT	Special Marine Warning	MOB		88 min
May 30, 2:23 AM CDT	Severe Thunderstorm Warning	MOB	Covington	37 min
May 30, 2:12 PM CDT	Special Marine Warning	MOB		93 min
May 30, 3:00 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	60 min
May 30, 3:19 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	56 min
May 30, 4:03 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	57 min
May 30, 4:12 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	37 min
May 30, 4:16 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	59 min
May 30, 4:21 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	54 min
May 30, 5:06 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Monroe	54 min
May 30, 5:14 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	24 min
May 30, 5:38 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	67 min
May 30, 5:52 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	29 min
May 30, 6:20 PM CDT	Severe Thunderstorm Warning	MOB	Covington, Escambia	32 min
May 30, 6:47 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	46 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.