Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 152, NWS Mobile, AL

April 30, 2017Choctaw County, Clarke County, Washington County, Alabama; Greene County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 30, 2017, 1:46 PM CDT for Choctaw County, Clarke County, Washington County, Alabama; Greene County, Wayne County, Mississippi. It was in force for 59 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, 1:46 PM CDT (18:46 UTC)
Expired: Apr 30, 2017, 2:45 PM CDT
In force: 59 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL, Greene County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 137 km from the middle of the area, began a volume at 18:50 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

Birmingham, AL (KBMX), launched 12:00Z, 6.8 hours before the alert went out and 184 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: 53 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

639 
WUUS54 KMOB 301846
SVRMOB
ALC023-025-129-MSC041-153-301945-
/O.NEW.KMOB.SV.W.0152.170430T1846Z-170430T1945Z/

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

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southern Choctaw County in southwestern Alabama...
  Washington County in southwestern Alabama...
  Clarke County in southwestern Alabama...
  Southeastern Wayne County in southeastern Mississippi...
  Northern Greene County in southeastern Mississippi...

* Until 245 PM CDT

* At 146 PM CDT, severe thunderstorms were located along a line
  extending from near Putnam to near Chatom to near Fruitdale, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Jackson, Thomasville, Grove Hill, Chatom, Saint Stephens,
  Wagarville, Leroy, Whatley, Tibbie, Millry, State Line, Buckatunna,
  Silas, Fruitdale, Coffeeville, Fulton, McIntosh and Gilbertown.

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

LAT...LON 3210 8805 3209 8804 3206 8807 3207 8810
      3205 8812 3202 8812 3199 8810 3201 8809
      3199 8807 3199 8767 3188 8767 3187 8762
      3183 8762 3183 8755 3154 8763 3125 8805
      3124 8884 3156 8856 3212 8814 3213 8804
TIME...MOT...LOC 1846Z 263DEG 21KT 3199 8806 3149 8820 3129 8848 

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

1 follow-up statement

859 
WWUS54 KMOB 301933
SVSMOB

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

ALC023-MSC153-301942-
/O.CAN.KMOB.SV.W.0152.000000T0000Z-170430T1945Z/
Choctaw AL-Wayne MS-
233 PM CDT SUN APR 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHOCTAW AND
SOUTHEASTERN WAYNE COUNTIES IS CANCELLED...

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

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 south central and southwestern Alabama.

LAT...LON 3199 8767 3188 8767 3187 8762 3183 8762
      3183 8755 3154 8763 3125 8805 3124 8861
      3170 8813 3170 8809 3175 8810 3194 8801
      3199 8794
TIME...MOT...LOC 1932Z 262DEG 21KT 3196 8771 3152 8790 3132 8818 

$$

ALC025-129-MSC041-301945-
/O.CON.KMOB.SV.W.0152.000000T0000Z-170430T1945Z/
Washington AL-Clarke AL-Greene MS-
233 PM CDT SUN APR 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR WASHINGTON...CLARKE AND EAST CENTRAL GREENE COUNTIES...

At 232 PM CDT, severe thunderstorms were located along a line
extending from near Shawnee to Jackson to near Tibbie, moving east at
25 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Jackson, Thomasville, Grove Hill, Chatom, Saint Stephens, Wagarville,
Leroy, Whatley, Tibbie, Fruitdale, Coffeeville, Fulton and McIntosh.

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

LAT...LON 3199 8767 3188 8767 3187 8762 3183 8762
      3183 8755 3154 8763 3125 8805 3124 8861
      3170 8813 3170 8809 3175 8810 3194 8801
      3199 8794
TIME...MOT...LOC 1932Z 262DEG 21KT 3196 8771 3152 8790 3132 8818 

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 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, 1:02 PM CDT	Severe Thunderstorm Warning	MOB	Washington	58 min
Apr 30, 1:06 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	39 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 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.