Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS Mobile, AL

April 14, 2018George County, Mississippi; Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 14, 2018, 6:57 PM CDT for George County, Mississippi; Mobile County, Alabama. It was in force for 20 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 14, 2018, 6:57 PM CDT (23:57 UTC)
Expired: Apr 14, 2018, 7:17 PM CDT
In force: 20 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Mobile County, AL, George County, MS

The radar

The Mobile radar (KMOB), 16 km from the middle of the area, began a volume at 23:58 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 14, 10:36 AM CDT	Tornado Watch	SPC	8 hr
Apr 14, 6:55 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 12.0 hours before the alert went out and 164 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: 1802 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 534 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

As transmitted.

609 
WUUS54 KMOB 142357
SVRMOB
ALC097-MSC039-150045-
/O.NEW.KMOB.SV.W.0013.180414T2357Z-180415T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
657 PM CDT SAT APR 14 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Mobile County in southwestern Alabama...
  Southeastern George County in southeastern Mississippi...

* Until 745 PM CDT.

* At 657 PM CDT, a severe thunderstorm was located near Tanner
  Williams, or 16 miles southeast of Lucedale, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Midtown Mobile, Downtown Mobile, Prichard, Saraland, Chickasaw,
  Satsuma, Creola, Axis, Semmes, Tanner Williams, I65 And I165,
  Mobile Regional Airport, Wilmer and I65 And AL 158.

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 200 AM CDT for southwestern
Alabama...and southeastern Mississippi.

LAT...LON 3074 8841 3074 8852 3078 8854 3099 8801
      3081 8794 3077 8802 3078 8794 3079 8794
      3076 8792 3075 8797 3075 8792 3072 8794
      3074 8794 3072 8798 3075 8798 3073 8801
      3071 8800 3062 8841
TIME...MOT...LOC 2357Z 250DEG 26KT 3073 8843 

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

1 follow-up statement

539 
WWUS54 KMOB 150017
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
717 PM CDT SAT APR 14 2018

ALC097-MSC039-150027-
/O.CAN.KMOB.SV.W.0013.000000T0000Z-180415T0045Z/
Mobile AL-George MS-
717 PM CDT SAT APR 14 2018

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOBILE AND
SOUTHEASTERN GEORGE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 200 AM CDT for southwestern
Alabama...and southeastern Mississippi.

LAT...LON 3074 8841 3074 8852 3078 8854 3099 8801
      3081 8794 3077 8802 3078 8794 3079 8794
      3076 8792 3075 8797 3075 8792 3072 8794
      3074 8794 3072 8798 3075 8798 3073 8801
      3071 8800 3062 8841
TIME...MOT...LOC 0014Z 250DEG 26KT 3078 8827 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:20 PM CDT	River Flood Warning	MOB	George, Greene, Jackson	14 hr
Apr 14, 3:19 AM CDT	Wind Advisory	MOB	George, Greene, Perry, Stone, Wayne	18 hr
Apr 14, 10:58 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	62 min
Apr 14, 11:50 AM CDT	Severe Thunderstorm Warning	MOB	Perry, Stone	55 min
Apr 14, 11:51 AM CDT	Areal Flood Advisory	MOB	Greene, Perry, Wayne	3 hr
Apr 14, 11:59 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Wayne	61 min
Apr 14, 12:40 PM CDT	Special Weather Statement	MOB	Perry	50 min
Apr 14, 1:00 PM CDT	Areal Flood Advisory	MOB	Greene, Perry, Stone	3 hr
Apr 14, 1:50 PM CDT	Flash Flood Warning	MOB	Perry, Stone	6 hr
Apr 14, 1:54 PM CDT	Flash Flood Warning	MOB	Greene, Perry, Wayne	6 hr
Apr 14, 2:35 PM CDT	Flash Flood Warning	MOB	Greene, Wayne	6 hr
Apr 14, 3:47 PM CDT	Special Weather Statement	MOB	George	58 min
Apr 14, 3:50 PM CDT	Flash Flood Warning	MOB	George, Greene, Perry, Stone	6 hr
Apr 14, 5:05 PM CDT	Special Weather Statement	MOB	Stone	55 min
Apr 14, 6:03 PM CDT	Special Weather Statement	MOB	George, Greene	57 min
Apr 14, 4:09 AM CDT	Gale Warning	MOB		18 hr
Apr 14, 4:09 AM CDT	Small Craft Advisory	MOB		63 hr
Apr 14, 1:07 PM CDT	Special Weather Statement	MOB	Choctaw	53 min
Apr 14, 2:00 PM CDT	Areal Flood Advisory	MOB	Choctaw, Clarke, Washington	3 hr
Apr 14, 3:46 PM CDT	Flash Flood Warning	MOB	Clarke, Washington	6 hr
Apr 14, 4:53 PM CDT	Flash Flood Warning	MOB	Washington	6 hr
Apr 14, 5:34 PM CDT	Areal Flood Advisory	MOB	Clarke, Washington, Wilcox	3 hr
Apr 14, 6:14 PM CDT	Flash Flood Warning	MOB	Clarke, Washington, Wilcox	6 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2018 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.