Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 1, NWS Mobile, AL

January 18, 2011Greene County, Mississippi; Mobile County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jan 18, 2011, 5:23 PM CST for Greene County, Mississippi; Mobile County, Washington County, Alabama. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 18, 2011, 5:23 PM CST (23:23 UTC)
Expired: Jan 18, 2011, 6:01 PM CST
In force: 38 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Mobile County, AL, Washington County, AL, Greene County, MS

The radar

The Mobile radar (KMOB), 67 km from the middle of the area, began a volume at 23:25 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.

What was reported inside it

Time	Report	Where	Remark
Jan 18, 5:41 PM CST	HAIL 0.75	Leakesville, MS	GREENE COUNTY EMA REPORTED DIZE SIZE HAIL COVERING THE GROUND IN LEAKESVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.4 hours before the alert went out and 147 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1147 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 140 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.

155 
WUUS54 KMOB 182323
SVRMOB
ALC097-129-MSC041-190015-
/O.NEW.KMOB.SV.W.0001.110118T2323Z-110119T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
523 PM CST TUE JAN 18 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF LEAKESVILLE...
  NORTHWESTERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  SOUTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 615 PM CST

* AT 520 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 14 MILES WEST OF LEAKESVILLE...
  OR NEAR MCLAIN...AND MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEAKESVILLE AROUND 540 PM CST...

&&

LAT...LON 3125 8883 3134 8831 3109 8828 3103 8883
TIME...MOT...LOC 2323Z 261DEG 40KT 3114 8875

$$

2 follow-up statements

386 
WWUS54 KMOB 182340
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
540 PM CST TUE JAN 18 2011

ALC097-129-MSC041-190015-
/O.CON.KMOB.SV.W.0001.000000T0000Z-110119T0015Z/
WASHINGTON AL-GREENE MS-MOBILE AL-
540 PM CST TUE JAN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CST
FOR NORTHWESTERN MOBILE...CENTRAL GREENE AND SOUTHWESTERN WASHINGTON
COUNTIES...

AT 539 PM CST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OVER 60
MPH.  THIS STORM WAS NEAR LEAKESVILLE...MOVING EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WALLEY AND BURBANK AROUND 550 PM CST...
  DEER PARK...VINEGAR BEND...ESCATAWPA AND FOUR POINT AROUND 555 PM
  CST...

LAT...LON 3105 8871 3126 8869 3133 8831 3109 8828
      3106 8856
TIME...MOT...LOC 2341Z 261DEG 40KT 3117 8852

$$

635 
WWUS54 KMOB 190001
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
601 PM CST TUE JAN 18 2011

ALC097-129-MSC041-190011-
/O.CAN.KMOB.SV.W.0001.000000T0000Z-110119T0015Z/
WASHINGTON AL-GREENE MS-MOBILE AL-
601 PM CST TUE JAN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MOBILE...CENTRAL
GREENE AND SOUTHWESTERN WASHINGTON COUNTIES IS CANCELLED...

THIS THUNDERSTORMS HAS WEAKENED BELOW SEVERE LIMITS. DIME SIZED HAIL 
WAS REPORTED IN LEAKESVILLE WITH THIS STORM.

LAT...LON 3105 8871 3126 8869 3133 8831 3109 8828
      3106 8856
TIME...MOT...LOC 0001Z 261DEG 40KT 3120 8826

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 18, 5:28 AM CST	Dense Fog Advisory	MOB	Conecuh, Covington, Escambia	15 min
Jan 18, 7:06 AM CST	Marine Dense Fog Advisory	MOB		3 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Severe Thunderstorm Warnings in Mississippi, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.