Alert archive / Mississippi / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 149, NWS Mobile, AL

April 30, 20174 counties in Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 30, 2017, 12:16 PM CDT for 4 counties in Mississippi. It was in force for 44 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, 12:16 PM CDT (17:16 UTC)
Expired: Apr 30, 2017, 1:00 PM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Mobile radar (KMOB), 82 km from the middle of the area, began a volume at 17:19 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, 7:32 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.3 hours before the alert went out and 104 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.

944 
WUUS54 KMOB 301716
SVRMOB
MSC039-041-111-131-301800-
/O.NEW.KMOB.SV.W.0149.170430T1716Z-170430T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1216 PM CDT SUN APR 30 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Western George County in southeastern Mississippi...
  Perry County in southeastern Mississippi...
  Greene County in southeastern Mississippi...
  Stone County in southeastern Mississippi...

* Until 100 PM CDT

* At 1215 PM CDT, severe thunderstorms were located along a line
  extending from 8 miles south of Clara to near Maxie to 12 miles
  north of Kiln, moving east at 20 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Wiggins, Richton, Leakesville, Perkinston, McHenry, Beaumont, New
  Augusta, McLain and State Line.

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 8933 3091 8914 3131 8915 3139 8911
      3143 8896 3144 8845 3129 8844 3073 8885
      3073 8889 3068 8889 3068 8924 3065 8925
      3065 8934
TIME...MOT...LOC 1715Z 261DEG 17KT 3146 8872 3093 8925 3059 8939 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

Butts

1 follow-up statement

186 
WWUS54 KMOB 301741
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1241 PM CDT SUN APR 30 2017

MSC039-041-111-131-301800-
/O.CON.KMOB.SV.W.0149.000000T0000Z-170430T1800Z/
George MS-Perry MS-Greene MS-Stone MS-
1241 PM CDT SUN APR 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR WESTERN GEORGE...PERRY...GREENE AND STONE COUNTIES...

At 1240 PM CDT, severe thunderstorms were located along a line
extending from near Buckatunna to near Maxie to 8 miles west of
Saucier, moving east at 20 mph.

HAZARD...70 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Wiggins, Richton, Leakesville, Perkinston, McHenry, Beaumont, New
Augusta, McLain and State Line.

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 8933 3091 8914 3131 8915 3139 8911
      3143 8896 3144 8845 3129 8844 3073 8885
      3073 8889 3068 8889 3068 8924 3065 8925
      3065 8934
TIME...MOT...LOC 1740Z 261DEG 17KT 3148 8860 3095 8913 3061 8927 

TORNADO...POSSIBLE
HAIL...0.75IN
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, 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, 12:46 PM CDT	Areal Flood Advisory	MOB	George, Greene, Perry, Stone, Wayne	3 hr
Apr 30, 1:02 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	58 min
Apr 30, 1:06 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	39 min
Apr 30, 1:46 PM CDT	Severe Thunderstorm Warning	MOB	Greene, Wayne	59 min
Apr 30, 2:00 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	60 min
Apr 30, 4:09 PM CDT	Areal Flood Advisory	MOB	George	3 hr
Apr 30, 6:17 PM CDT	Flash Flood Watch	MOB	George, Greene	9 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.