Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 111, NWS Mobile, AL

April 3, 2017Clarke County, Mobile County, Washington County, Alabama; George County, Greene County, Stone County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 3, 2017, 5:57 AM CDT for Clarke County, Mobile County, Washington County, Alabama; George County, Greene County, Stone County, Mississippi. It was in force for 48 min. 1 report 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: Apr 3, 2017, 5:57 AM CDT (10:57 UTC)
Expired: Apr 3, 2017, 6:45 AM CDT
In force: 48 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Clarke County, AL, Mobile County, AL, Washington County, AL, George County, MS, Greene County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 10:59 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
Apr 3, 6:25 AM CDT	TSTM WND DMG	Citronelle, AL	SEVERAL TREES DOWN

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
Apr 3, 1:48 AM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.0 hours before the alert went out and 171 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: 2436 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 4.6
Supercell composite: 19.5

Open this sounding in Storm Lab

The text

As transmitted.

118 
WUUS54 KMOB 031057
SVRMOB
ALC025-097-129-MSC039-041-131-031145-
/O.NEW.KMOB.SV.W.0111.170403T1057Z-170403T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
557 AM CDT MON APR 3 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northern Mobile County in southwestern Alabama...
  Washington County in southwestern Alabama...
  Southeastern Clarke County in southwestern Alabama...
  George County in southeastern Mississippi...
  Southeastern Greene County in southeastern Mississippi...
  Southeastern Stone County in southeastern Mississippi...

* Until 645 AM CDT

* At 556 AM CDT, severe thunderstorms were located along a line
  extending from near Chatom to 6 miles north of Lucedale to 6 miles
  west of Saucier, moving east at 40 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Jackson, Citronelle, Lucedale, Chatom, Leakesville, Chunchula,
  Wagarville, Leroy, McHenry, Gulfcrest, Deer Park, Tibbie, Calvert,
  Mount Vernon, Tanner Williams, Fruitdale, McIntosh, Wilmer, Movico
  and Saucier.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 900 AM CDT for southwestern
Alabama...and southeastern Mississippi.

LAT...LON 3102 8866 3151 8832 3150 8763 3134 8775
      3136 8777 3128 8778 3123 8786 3114 8787
      3116 8793 3107 8796 3109 8792 3107 8794
      3109 8791 3103 8796 3069 8841 3074 8841
      3073 8888 3068 8889 3065 8927
TIME...MOT...LOC 1056Z 269DEG 33KT 3150 8829 3102 8860 3064 8924 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

1 follow-up statement

296 
WWUS54 KMOB 031136
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
636 AM CDT MON APR 3 2017

ALC025-097-129-MSC039-041-131-031145-
/O.CON.KMOB.SV.W.0111.000000T0000Z-170403T1145Z/
Mobile AL-Washington AL-Clarke AL-George MS-Greene MS-Stone MS-
636 AM CDT MON APR 3 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 AM CDT
FOR NORTHERN MOBILE...SOUTHERN WASHINGTON...SOUTHEASTERN CLARKE...
GEORGE...SOUTHEASTERN GREENE AND SOUTHEASTERN STONE COUNTIES...

At 635 AM CDT, severe thunderstorms were located along a line
extending from Jackson to near Gulfcrest to 10 miles north of 
Latimer, moving east at 40 mph.  A new severe thunderstorm warning 
may soon be issued for this general area.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Jackson, Citronelle, Lucedale, Chunchula, Wagarville, Leroy, McHenry,
Gulfcrest, Deer Park, Tibbie, Calvert, Mount Vernon, Tanner Williams,
McIntosh, Wilmer, Movico and Saucier.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 900 AM CDT for southwestern
Alabama...and southeastern Mississippi.

LAT...LON 3102 8866 3151 8820 3150 8763 3134 8775
      3136 8777 3128 8778 3123 8786 3114 8787
      3116 8793 3107 8796 3109 8792 3107 8794
      3109 8791 3103 8796 3069 8841 3074 8841
      3073 8888 3068 8889 3065 8927
TIME...MOT...LOC 1135Z 269DEG 33KT 3150 8789 3103 8820 3065 8884 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 3:29 AM CDT	Special Weather Statement	MOB	Choctaw	46 min
Apr 3, 3:41 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	49 min
Apr 3, 5:10 AM CDT	Severe Thunderstorm Warning	MOB	Washington	50 min
Apr 3, 5:45 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	45 min
Apr 3, 6:28 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	47 min
Apr 3, 6:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Escambia, Mobile, Monroe, Washington	47 min
Apr 3, 6:53 AM CDT	Special Marine Warning	MOB		97 min
Apr 3, 7:26 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 2 more	49 min
Apr 3, 7:27 AM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
Apr 3, 7:45 AM CDT	Special Weather Statement	MOB	Baldwin, Covington, Escambia	45 min
Apr 3, 7:53 AM CDT	Flash Flood Watch	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	4 hr
Apr 3, 7:55 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
Apr 3, 8:09 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	51 min
Apr 3, 8:26 AM CDT	Special Marine Warning	MOB		94 min
Apr 3, 8:26 AM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	64 min
Apr 3, 8:49 AM CDT	Special Marine Warning	MOB		56 min
Apr 3, 8:54 AM CDT	Flash Flood Warning	MOB	Baldwin	4 hr
Apr 3, 8:54 AM CDT	Tornado Warning	MOB	Crenshaw	13 min
Apr 3, 8:59 AM CDT	Special Marine Warning	MOB		61 min
Apr 3, 9:00 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia, Mobile	60 min
Apr 3, 9:33 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Apr 3, 9:33 AM CDT	Special Marine Warning	MOB		87 min
Apr 3, 9:36 AM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington	39 min
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	8 days
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	9 days
Apr 3, 9:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	62 min
Apr 3, 10:02 AM CDT	Special Marine Warning	MOB		58 min
Apr 3, 10:46 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	45 min
Apr 3, 10:55 AM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 12:54 PM CDT	Special Marine Warning	MOB		66 min
Apr 3, 1:55 PM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 3:51 PM CDT	Special Marine Warning	MOB		114 min
Apr 3, 5:38 PM CDT	Special Marine Warning	MOB		67 min
Apr 3, 4:53 AM CDT	Special Weather Statement	MOB	Greene, Perry	52 min
Apr 3, 5:20 AM CDT	Severe Thunderstorm Warning	MOB	Perry, Stone	40 min
Apr 3, 5:22 AM CDT	Areal Flood Advisory	MOB	Wayne	3 hr
Apr 3, 6:03 AM CDT	Areal Flood Advisory	MOB	George, Greene, Perry, Stone	3 hr
Apr 3, 7:04 AM CDT	Flash Flood Warning	MOB	George, Greene, Stone	3 hr
Apr 3, 10:59 AM CDT	River Flood Warning	MOB	George, Greene, Wayne	9 days

Nearby

Severe Thunderstorm Warnings in Alabama, 2017 Severe Thunderstorm Warnings in Mississippi, 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.