Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 98, NWS Mobile, AL

June 7, 2011Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jun 7, 2011, 5:53 PM CDT for Washington County, Alabama. It was in force for 37 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: Jun 7, 2011, 5:53 PM CDT (22:53 UTC)
Expired: Jun 7, 2011, 6:30 PM CDT
In force: 37 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Washington County, AL

The radar

The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 22:55 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.9 hours before the alert went out and 185 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: 639 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 1521 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

401 
WUUS54 KMOB 072253
SVRMOB
ALC129-072330-
/O.NEW.KMOB.SV.W.0098.110607T2253Z-110607T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
553 PM CDT TUE JUN 7 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 630 PM CDT

* AT 550 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
  SOUTH OF CHATOM...OR 14 MILES SOUTHEAST OF STATE LINE...AND MOVING
  EAST-SOUTHEAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TIBBIE AROUND 600 PM CDT...

VERY HEAVY RAINS AND LOCALIZED FLOODING IS POSSIBLE WITH THE SLOW 
MOVEMENT OF THIS STORM.

&&

LAT...LON 3143 8817 3123 8823 3130 8842 3148 8836
TIME...MOT...LOC 2252Z 291DEG 3KT 3135 8826

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 12:33 AM CDT	Special Marine Warning	MOB		87 min
Jun 7, 2:11 AM CDT	Special Marine Warning	MOB		94 min
Jun 7, 3:16 AM CDT	Special Marine Warning	MOB		44 min
Jun 7, 4:10 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	35 min
Jun 7, 4:30 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Escambia	45 min
Jun 7, 4:36 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	39 min
Jun 7, 4:46 PM CDT	Severe Thunderstorm Warning	MOB	Washington	44 min
Jun 7, 4:52 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Escambia, Monroe	38 min
Jun 7, 5:07 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	16 min
Jun 7, 5:18 PM CDT	Severe Thunderstorm Warning	MOB	Washington	42 min
Jun 7, 5:19 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Escambia, Monroe, Washington	41 min
Jun 7, 5:35 PM CDT	Flash Flood Warning	MOB	Washington	4 hr
Jun 7, 5:39 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Choctaw, Clarke, Mobile, Monroe, Washington	51 min
Jun 7, 6:08 PM CDT	Severe Thunderstorm Warning	MOB	Washington	52 min
Jun 7, 6:17 PM CDT	Severe Thunderstorm Warning	MOB	Mobile, Washington	43 min
Jun 7, 6:38 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	37 min
Jun 7, 6:47 PM CDT	Special Marine Warning	MOB		88 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every severe thunderstorm warning in 2011

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.