Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

July 1, 2017Choctaw County, Alabama

NWS Mobile, AL issued this special weather statement at Jul 1, 2017, 7:02 PM CDT for Choctaw County, Alabama. It was in force for 58 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 1, 2017, 7:02 PM CDT (00:02 UTC)
Expired
Jul 1, 2017, 8:00 PM CDT
In force
58 min
Issued by
NWS Mobile, AL

County Choctaw County, AL

The radar

The Mobile radar (KMOB), 165 km from the middle of the area, began a volume at 00:04 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 00:00Z, 0.0 hours before the alert went out and 166 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 00:00Z on 2017-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1083 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 00:00Z on 2017-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.193958Sfc1 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
1083 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1245 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

140 
WWUS84 KMOB 020002
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
702 PM CDT SAT JUL 1 2017
 
ALZ051-020100-
Choctaw AL-
702 PM CDT SAT JUL 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...CHOCTAW COUNTY UNTIL 800 PM CDT...

At 701 PM CDT, the strong thunderstorms were located along a line
extending from near Dug Hill to near Paulding,and moving southeast at
20 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Butler, Lisman and Pennington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3230 8796 3230 8798 3228 8802 3218 8801
      3215 8802 3214 8804 3211 8805 3209 8804
      3206 8807 3207 8810 3205 8812 3199 8808
      3191 8847 3231 8842 3231 8796
TIME...MOT...LOC 0001Z 315DEG 15KT 3248 8800 3207 8905 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 9:14 PM CDTSpecial Weather StatementMOBClarke, Washington61 min
Jul 1, 9:54 PM CDTSpecial Weather StatementMOBMonroe51 min
Jul 1, 10:22 PM CDTSpecial Weather StatementMOBEscambia53 min
Jul 1, 10:46 PM CDTSpecial Weather StatementMOBConecuh44 min
Jul 1, 10:57 PM CDTSpecial Marine WarningMOB63 min
Jul 2, 5:08 AM CDTRiver Flood WarningMOBCovington, Escambia10 hr
Jul 2, 10:13 AM CDTRiver Flood WarningMOBChoctaw, Clarke, Washington58 hr
Jul 1, 8:29 PM CDTSpecial Weather StatementMOBWayne46 min

Nearby

Special Weather Statements in Alabama, 2017Every special weather statement 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.