Alert archive / Alabama / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 173, NWS Mobile, AL

July 21, 2016Monroe County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 21, 2016, 5:38 PM CDT for Monroe County, Alabama. It was in force for 22 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 21, 2016, 5:38 PM CDT (22:38 UTC)
Expired: Jul 21, 2016, 6:00 PM CDT
In force: 22 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

County Monroe County, AL

The radar

The Mobile radar (KMOB), 137 km from the middle of the area, began a volume at 22:40 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, 10.6 hours before the alert went out and 179 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: 1505 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

857 
WUUS54 KMOB 212238
SVRMOB
ALC099-212330-
/O.NEW.KMOB.SV.W.0173.160721T2238Z-160721T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
538 PM CDT THU JUL 21 2016

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MONROE COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 630 PM CDT

* AT 537 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  PETERMAN...OR 7 MILES NORTH OF MONROEVILLE...MOVING SOUTHWEST AT
  15 MPH.

  HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  MONROEVILLE AND PETERMAN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3175 8733 3161 8719 3145 8732 3166 8753
TIME...MOT...LOC 2237Z 051DEG 11KT 3164 8733 

HAIL...0.88IN
WIND...60MPH
 
$$

1 follow-up statement

359 
WWUS54 KMOB 212300
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
600 PM CDT THU JUL 21 2016

ALC099-212310-
/O.CAN.KMOB.SV.W.0173.000000T0000Z-160721T2330Z/
MONROE AL-
600 PM CDT THU JUL 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MONROE COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 3175 8733 3161 8719 3145 8732 3166 8753
TIME...MOT...LOC 2255Z 051DEG 11KT 3159 8740 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 12:51 PM CDT	Special Weather Statement	MOB	Mobile	24 min
Jul 21, 1:13 PM CDT	Special Weather Statement	MOB	Baldwin	47 min
Jul 21, 1:46 PM CDT	Special Weather Statement	MOB	Baldwin	44 min
Jul 21, 2:24 PM CDT	Special Weather Statement	MOB	Baldwin	36 min
Jul 21, 2:25 PM CDT	Special Weather Statement	MOB	Mobile	50 min
Jul 21, 2:28 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	32 min
Jul 21, 2:51 PM CDT	Areal Flood Advisory	MOB	Mobile	54 min
Jul 21, 2:56 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	34 min
Jul 21, 3:27 PM CDT	Special Weather Statement	MOB	Covington	48 min
Jul 21, 3:44 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	31 min
Jul 21, 5:59 PM CDT	Special Weather Statement	MOB	Monroe	31 min
Jul 21, 6:45 PM CDT	Special Weather Statement	MOB	Wilcox	30 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2016 Every severe thunderstorm warning in 2016

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.