Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 196, NWS Mobile, AL

July 8, 2017Clarke County, Monroe County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 8, 2017, 4:09 PM CDT for Clarke County, Monroe County, Washington County, Alabama. It was in force for 51 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
Jul 8, 2017, 4:09 PM CDT (21:09 UTC)
Expired
Jul 8, 2017, 5:00 PM CDT
In force
51 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Clarke County, AL, Monroe County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 100 km from the middle of the area, began a volume at 21:12 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, 9.2 hours before the alert went out and 211 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 2017-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2293 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 2017-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
2293 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
591 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

884 
WUUS54 KMOB 082109
SVRMOB
ALC025-099-129-082200-
/O.NEW.KMOB.SV.W.0196.170708T2109Z-170708T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
409 PM CDT SAT JUL 8 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southwestern Monroe County in south central Alabama...
  Eastern Washington County in southwestern Alabama...
  Central Clarke County in southwestern Alabama...

* Until 500 PM CDT

* At 408 PM CDT, severe thunderstorms were located along a line
  extending from near Whatley to 6 miles northwest of Wagarville,
  moving southeast at 15 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Jackson, Frisco City, Saint Stephens, Wagarville, Leroy, Whatley,
  Excel and McIntosh.

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 these storms. 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 3142 8728 3123 8802 3153 8824 3169 8775
TIME...MOT...LOC 2108Z 311DEG 13KT 3158 8770 3147 8813 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 11:43 AM CDTSpecial Weather StatementMOBMobile32 min
Jul 8, 12:07 PM CDTSpecial Marine WarningMOB53 min
Jul 8, 12:57 PM CDTSpecial Weather StatementMOBEscambia33 min
Jul 8, 12:59 PM CDTSpecial Weather StatementMOBBaldwin31 min
Jul 8, 1:14 PM CDTSpecial Weather StatementMOBEscambia31 min
Jul 8, 1:34 PM CDTSpecial Weather StatementMOBBaldwin26 min
Jul 8, 2:10 PM CDTSpecial Marine WarningMOB65 min
Jul 8, 2:26 PM CDTSpecial Weather StatementMOBCovington49 min
Jul 8, 2:31 PM CDTSpecial Weather StatementMOBCrenshaw29 min
Jul 8, 3:13 PM CDTAreal Flood AdvisoryMOBCovington, Escambia3 hr
Jul 8, 3:13 PM CDTSpecial Weather StatementMOBMonroe32 min
Jul 8, 3:19 PM CDTSpecial Weather StatementMOBChoctaw41 min
Jul 8, 3:37 PM CDTSpecial Weather StatementMOBClarke, Monroe38 min
Jul 8, 3:56 PM CDTSpecial Weather StatementMOBWashington34 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017Every 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.