Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 91, NWS Mobile, AL

August 10, 2018Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 10, 2018, 12:57 PM CDT for Wilcox County, Alabama. It was in force for 28 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
Aug 10, 2018, 12:57 PM CDT (17:57 UTC)
Expired
Aug 10, 2018, 1:25 PM CDT
In force
28 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 132 km from the middle of the area, began a volume at 17:59 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

Birmingham, AL (KBMX), launched 12:00Z, 6.0 hours before the alert went out and 133 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2018-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2011 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2018-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2011 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
505 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

227 
WUUS54 KMOB 101757
SVRMOB
ALC131-101845-
/O.NEW.KMOB.SV.W.0091.180810T1757Z-180810T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1257 PM CDT FRI AUG 10 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wilcox County in south central Alabama...

* Until 145 PM CDT.

* At 1257 PM CDT, a severe thunderstorm was located 4 miles northwest
  of Camden, moving southeast 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...
  Camden and Pine Apple. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3211 8724 3210 8723 3208 8719 3207 8719
      3206 8718 3205 8718 3205 8709 3199 8691
      3184 8691 3183 8716 3202 8745 3213 8738
TIME...MOT...LOC 1757Z 304DEG 19KT 3203 8735 

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

JLH
2 follow-up statements
613 
WWUS54 KMOB 101811
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
111 PM CDT FRI AUG 10 2018

ALC131-101845-
/O.CON.KMOB.SV.W.0091.000000T0000Z-180810T1845Z/
Wilcox AL-
111 PM CDT FRI AUG 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR SOUTHEASTERN WILCOX COUNTY...

At 111 PM CDT, a severe thunderstorm was located over Camden, moving
southeast at 25 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Camden and Pine Apple. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3205 8718 3198 8691 3184 8691 3183 8716
      3199 8737 3206 8733 3209 8730
TIME...MOT...LOC 1811Z 305DEG 21KT 3200 8729 

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

JLH
252 
WWUS54 KMOB 101825
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
125 PM CDT FRI AUG 10 2018

ALC131-101835-
/O.CAN.KMOB.SV.W.0091.000000T0000Z-180810T1845Z/
Wilcox AL-
125 PM CDT FRI AUG 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILCOX COUNTY 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.

LAT...LON 3205 8718 3198 8691 3184 8691 3183 8716
      3199 8737 3206 8733 3209 8730
TIME...MOT...LOC 1822Z 304DEG 19KT 3196 8722 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 8:54 PM CDTAreal Flood AdvisoryMOBClarke, Monroe3 hr
Aug 10, 7:54 AM CDTSpecial Marine WarningMOB96 min
Aug 10, 8:22 AM CDTSpecial Marine WarningMOB83 min
Aug 10, 8:31 AM CDTSpecial Marine WarningMOB76 min
Aug 10, 12:44 PM CDTSpecial Weather StatementMOBButler, Conecuh, Crenshaw46 min
Aug 10, 12:53 PM CDTSpecial Weather StatementMOBWilcox37 min
Aug 10, 3:58 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile32 min
Aug 10, 4:43 PM CDTSpecial Weather StatementMOBConecuh47 min
Aug 10, 4:48 PM CDTSpecial Weather StatementMOBEscambia42 min
Aug 10, 5:26 PM CDTSevere Thunderstorm WarningMOBCovington29 min
Aug 10, 5:59 PM CDTAreal Flood AdvisoryMOBConecuh, Covington, Escambia3 hr
Aug 10, 6:00 PM CDTSpecial Weather StatementMOBCovington45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2018Every 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.