Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 166, NWS Mobile, AL

May 12, 2017Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 12, 2017, 1:16 PM CDT for Baldwin County, Mobile County, Alabama. It was in force for 44 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 12, 2017, 1:16 PM CDT (18:16 UTC)
Expired: May 12, 2017, 2:00 PM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Baldwin County, AL, Mobile County, AL

The radar

The Mobile radar (KMOB), 22 km from the middle of the area, began a volume at 18:18 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 12, 1:40 PM CDT	TSTM WND DMG	Bay Minette, AL	SEVERAL REPORTS OF TREES DOWN AND SPORADIC OUTBUILDING AND ROOF DAMAGE NEAR BAY MINETTE. TIME ESTIMATED VIA RADAR.
May 12, 1:46 PM CDT	TSTM WND DMG	Phillipsville, AL	MULTIPLE TREES DOWN AND A FEW FENCES DOWN. MINOR ROOF DAMAGE TO SOME MOBILE HOME PORCHES AND AWNINGS.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 10:35 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 6.3 hours before the alert went out and 151 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: 704 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

114 
WUUS54 KMOB 121816
SVRMOB
ALC003-097-121900-
/O.NEW.KMOB.SV.W.0166.170512T1816Z-170512T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
116 PM CDT FRI MAY 12 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Mobile County in southwestern Alabama...
  Northwestern Baldwin County in southwestern Alabama...

* Until 200 PM CDT

* At 116 PM CDT, severe thunderstorms were located along a line
  extending from near Movico to near Creola to near Chickasaw to near
  Theodore, moving east at 35 mph.

  HAZARD...60 mph wind gusts and nickel size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Midtown Mobile, Downtown Mobile, Prichard, Daphne, Tillmans Corner,
  Saraland, Bay Minette, Theodore, Chickasaw, Satsuma, Spanish Fort,
  Robertsdale, Creola, Loxley, Chunchula, Stockton, Stapleton, Axis,
  Mount Vernon and Semmes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3053 8840 3114 8812 3115 8764 3055 8763
TIME...MOT...LOC 1816Z 262DEG 31KT 3104 8806 3089 8799 3078 8802 3055
8826

HAIL...0.88IN
WIND...60MPH
 
$$

1 follow-up statement

467 
WWUS54 KMOB 121847
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
147 PM CDT FRI MAY 12 2017

ALC097-121856-
/O.CAN.KMOB.SV.W.0166.000000T0000Z-170512T1900Z/
Mobile AL-
147 PM CDT FRI MAY 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL and Northern 
MOBILE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 400 PM CDT for
southwestern Alabama.

LAT...LON 3058 8811 3062 8811 3065 8803 3076 8803
      3079 8808 3077 8803 3082 8800 3082 8795
      3086 8800 3093 8796 3094 8795 3091 8796
      3095 8787 3102 8790 3108 8797 3114 8793
      3115 8764 3055 8763 3054 8808
TIME...MOT...LOC 1846Z 264DEG 46KT 3107 8772 3092 8766 3081 8769 3058
8793

$$

ALC003-121900-
/O.CON.KMOB.SV.W.0166.000000T0000Z-170512T1900Z/
Baldwin AL-
147 PM CDT FRI MAY 12 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR CENTRAL BALDWIN COUNTY...

At 146 PM CDT, severe thunderstorms were located along a line
extending from 9 miles northeast of Stockton to 11 miles southwest 
of Atmore to 7 miles southeast of Bay Minette to Daphne, moving east 
at 50 to 55 mph.

HAZARD...60 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Daphne, Bay Minette, Spanish Fort, Robertsdale, Loxley, Stockton,
Stapleton and I65 And AL 225.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3058 8811 3062 8811 3065 8803 3076 8803
      3079 8808 3077 8803 3082 8800 3082 8795
      3086 8800 3093 8796 3094 8795 3091 8796
      3095 8787 3102 8790 3108 8797 3114 8793
      3115 8764 3055 8763 3054 8808
TIME...MOT...LOC 1846Z 264DEG 46KT 3107 8772 3092 8766 3081 8769 3058
8793

HAIL...0.88IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 11:59 AM CDT	Severe Thunderstorm Warning	MOB	Mobile, Washington	61 min
May 12, 12:34 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	56 min
May 12, 12:41 PM CDT	Special Marine Warning	MOB		2 hr
May 12, 12:46 PM CDT	Special Weather Statement	MOB	Conecuh, Escambia, Monroe	59 min
May 12, 1:05 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	40 min
May 12, 1:11 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	27 min
May 12, 1:28 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	47 min
May 12, 1:43 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	47 min
May 12, 2:01 PM CDT	Special Marine Warning	MOB		59 min
May 12, 2:06 PM CDT	Special Weather Statement	MOB	Covington	54 min
May 12, 2:15 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Escambia	60 min
May 12, 2:37 PM CDT	Special Marine Warning	MOB		53 min
May 12, 2:43 PM CDT	Special Marine Warning	MOB		62 min
May 12, 2:47 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
May 12, 2:49 PM CDT	Severe Thunderstorm Warning	MOB	Covington	41 min
May 12, 2:55 PM CDT	Special Marine Warning	MOB		65 min
May 12, 3:00 PM CDT	Severe Thunderstorm Warning	MOB	Covington	60 min
May 12, 3:11 PM CDT	Special Marine Warning	MOB		2 hr
May 12, 3:46 PM CDT	Special Marine Warning	MOB		119 min
May 12, 5:45 PM CDT	Special Marine Warning	MOB		90 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017 Every severe thunderstorm warning in 2017

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.