Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 4, NWS Mobile, AL

February 10, 2018Choctaw County, Clarke County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 10, 2018, 5:41 PM CST for Choctaw County, Clarke County, Washington County, Alabama. It was in force for 49 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: Feb 10, 2018, 5:41 PM CST (23:41 UTC)
Expired: Feb 10, 2018, 6:30 PM CST
In force: 49 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 112 km from the middle of the area, began a volume at 23:41 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.7 hours before the alert went out and 197 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: 121 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 272 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

866 
WUUS54 KMOB 102341
SVRMOB
ALC023-025-129-110030-
/O.NEW.KMOB.SV.W.0004.180210T2341Z-180211T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
541 PM CST SAT FEB 10 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  South central Choctaw County in southwestern Alabama...
  Northwestern Washington County in southwestern Alabama...
  Northwestern Clarke County in southwestern Alabama...

* Until 630 PM CST

* At 540 PM CST, a severe thunderstorm was located 4 miles east of
  Millry, or 10 miles north of Chatom, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Millry and Coffeeville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3182 8773 3142 8834 3143 8844 3145 8845
      3154 8845 3199 8798 3199 8792
TIME...MOT...LOC 2340Z 226DEG 29KT 3161 8823 

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

05/RR

1 follow-up statement

166 
WWUS54 KMOB 110000
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
600 PM CST SAT FEB 10 2018

ALC023-025-129-110030-
/O.CON.KMOB.SV.W.0004.000000T0000Z-180211T0030Z/
Choctaw AL-Washington AL-Clarke AL-
600 PM CST SAT FEB 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CST
FOR SOUTH CENTRAL CHOCTAW...NORTH CENTRAL WASHINGTON AND NORTHWESTERN
CLARKE COUNTIES...

At 600 PM CST, a severe thunderstorm was located over Coffeeville, or
18 miles west of Grove Hill, moving northeast at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Coffeeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3182 8773 3151 8826 3152 8830 3156 8832
      3168 8830 3199 8798 3199 8792
TIME...MOT...LOC 0000Z 226DEG 29KT 3173 8809 

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

05/RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 9:21 PM CST	Marine Dense Fog Advisory	MOB		13 hr
Feb 10, 7:44 AM CST	Special Weather Statement	MOB	Baldwin, Mobile	91 min
Feb 10, 11:20 AM CST	Special Marine Warning	MOB		40 min
Feb 10, 11:57 AM CST	Special Marine Warning	MOB		48 min
Feb 10, 12:36 PM CST	Special Marine Warning	MOB		54 min
Feb 10, 12:44 PM CST	Special Marine Warning	MOB		31 min
Feb 10, 12:56 PM CST	Tornado Warning	MOB	Baldwin	27 min
Feb 10, 1:00 PM CST	Special Weather Statement	MOB	Baldwin	30 min
Feb 10, 1:29 PM CST	Special Marine Warning	MOB		61 min
Feb 10, 2:17 PM CST	Special Weather Statement	MOB	Baldwin	43 min
Feb 10, 2:31 PM CST	Special Marine Warning	MOB		59 min
Feb 10, 2:50 PM CST	Special Marine Warning	MOB		55 min
Feb 10, 2:53 PM CST	Special Weather Statement	MOB	Baldwin, Escambia	52 min
Feb 10, 3:30 PM CST	Special Marine Warning	MOB		60 min
Feb 10, 3:33 PM CST	Special Weather Statement	MOB	Escambia	42 min
Feb 10, 4:10 PM CST	Special Weather Statement	MOB	Conecuh, Escambia	50 min
Feb 10, 4:30 PM CST	Special Marine Warning	MOB		60 min
Feb 10, 4:45 PM CST	Special Weather Statement	MOB	Washington	45 min
Feb 10, 4:48 PM CST	Marine Dense Fog Advisory	MOB		15 hr
Feb 10, 4:49 PM CST	Severe Thunderstorm Warning	MOB	Washington	41 min
Feb 10, 5:10 PM CST	Tornado Warning	MOB	Washington	35 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2018 Every severe thunderstorm warning in 2018

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.