Alert archive / Mississippi / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 150, NWS Mobile, AL

April 30, 2017Washington County, Alabama; 4 counties in Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 30, 2017, 1:02 PM CDT for Washington County, Alabama; 4 counties in Mississippi. It was in force for 58 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: Apr 30, 2017, 1:02 PM CDT (18:02 UTC)
Expired: Apr 30, 2017, 2:00 PM CDT
In force: 58 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Washington County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 62 km from the middle of the area, began a volume at 18:01 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 30, 10:36 AM CDT	Tornado Watch	SPC	8 hr
Apr 30, 7:32 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.0 hours before the alert went out and 123 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: 1930 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

865 
WUUS54 KMOB 301802
SVRMOB
ALC129-MSC039-041-111-131-301900-
/O.NEW.KMOB.SV.W.0150.170430T1802Z-170430T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
102 PM CDT SUN APR 30 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southwestern Washington County in southwestern Alabama...
  George County in southeastern Mississippi...
  Perry County in southeastern Mississippi...
  Greene County in southeastern Mississippi...
  Stone County in southeastern Mississippi...

* Until 200 PM CDT

* At 102 PM CDT, severe thunderstorms were located along a line
  extending from 10 miles northeast of Richton to near McLain to 11
  miles south of Beaumont to 6 miles east of McHenry, moving east at
  45 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Wiggins, Lucedale, Richton, Leakesville, Perkinston, McHenry, Deer
  Park, Tibbie, Beaumont, New Augusta, McLain, State Line and
  Fruitdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly 
from severe thunderstorms. For your protection move to an interior 
room on the lowest floor of a building.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3091 8932 3091 8914 3143 8915 3144 8845
      3146 8845 3146 8818 3134 8818 3122 8824
      3114 8824 3111 8843 3078 8841 3073 8861
      3073 8888 3068 8889 3068 8924 3065 8925
      3065 8934
TIME...MOT...LOC 1802Z 248DEG 38KT 3143 8880 3113 8881 3101 8892 3069
8902

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

Butts

1 follow-up statement

370 
WWUS54 KMOB 301819
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
119 PM CDT SUN APR 30 2017

ALC129-MSC039-041-111-131-301900-
/O.CON.KMOB.SV.W.0150.000000T0000Z-170430T1900Z/
Washington AL-George MS-Perry MS-Greene MS-Stone MS-
119 PM CDT SUN APR 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR SOUTHWESTERN WASHINGTON...GEORGE...SOUTHERN PERRY...GREENE AND
STONE COUNTIES...

At 118 PM CDT, severe thunderstorms were located along a line
extending from near State Line to near Leakesville to near McLain to
11 miles east of McHenry, moving east at 30 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Wiggins, Lucedale, Leakesville, Perkinston, McHenry, Deer Park,
Tibbie, Beaumont, McLain, State Line and Fruitdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly 
from severe thunderstorms. For your protection move to an interior 
room on the lowest floor of a building.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3083 8922 3091 8914 3128 8892 3143 8884
      3144 8845 3146 8845 3146 8818 3134 8818
      3122 8824 3114 8824 3111 8843 3078 8841
      3073 8861 3073 8888 3068 8889 3068 8924
      3065 8925 3065 8934
TIME...MOT...LOC 1818Z 253DEG 25KT 3143 8852 3113 8865 3104 8884 3072
8894

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

Butts

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 12:02 PM CDT	Special Weather Statement	MOB	Choctaw	58 min
Apr 30, 12:46 PM CDT	Areal Flood Advisory	MOB	Choctaw, Washington	3 hr
Apr 30, 1:06 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	39 min
Apr 30, 1:46 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	59 min
Apr 30, 2:00 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Mobile, Washington	60 min
Apr 30, 2:50 PM CDT	Special Weather Statement	MOB	Wilcox	40 min
Apr 30, 3:03 PM CDT	Special Weather Statement	MOB	Mobile	57 min
Apr 30, 3:14 PM CDT	Areal Flood Advisory	MOB	Clarke, Mobile, Washington, Wilcox	3 hr
Apr 30, 3:56 PM CDT	Special Weather Statement	MOB	Mobile, Monroe	64 min
Apr 30, 4:01 PM CDT	Special Marine Warning	MOB		89 min
Apr 30, 4:09 PM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
Apr 30, 4:24 PM CDT	Special Weather Statement	MOB	Escambia	51 min
Apr 30, 4:43 PM CDT	Special Weather Statement	MOB	Baldwin, Mobile	62 min
Apr 30, 5:23 PM CDT	Special Marine Warning	MOB		52 min
Apr 30, 5:38 PM CDT	Special Weather Statement	MOB	Baldwin	67 min
Apr 30, 5:48 PM CDT	Special Weather Statement	MOB	Butler	42 min
Apr 30, 5:49 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	41 min
Apr 30, 6:10 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Escambia	35 min
Apr 30, 6:15 PM CDT	Special Marine Warning	MOB		90 min
Apr 30, 6:17 PM CDT	Flash Flood Watch	MOB	Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 3 more	9 hr
Apr 30, 6:23 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Apr 30, 6:37 PM CDT	Special Weather Statement	MOB	Conecuh, Escambia	53 min
Apr 30, 11:20 AM CDT	Special Weather Statement	MOB	George, Greene, Perry, Stone, Wayne	55 min
Apr 30, 11:34 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	41 min
Apr 30, 12:16 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	44 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2017 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.