Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 48, NWS Mobile, AL

April 15, 20115 counties in Alabama; George County, Greene County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 15, 2011, 9:59 PM CDT for 5 counties in Alabama; George County, Greene County, Mississippi. It was in force for 61 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
Apr 15, 2011, 9:59 PM CDT (02:59 UTC)
Expired
Apr 15, 2011, 11:00 PM CDT
In force
61 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Clarke County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, George County, MS, Greene County, MS

The radar

The Mobile radar (KMOB), 39 km from the middle of the area, began a volume at 03:03 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

TimeReportWhereRemark
Apr 15, 10:07 PM CDTTORNADOCitronelle, ALMOBILE EMA REPORTS ROOFS OFF HOMES AND MOBILE HOMES DAMAGED. LARGE TREES AND POWER LINES DOWN ACROSS ROADS. NO KNOWN INURIES AT THIS TIME.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 15, 7:48 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.0 hours before the alert went out and 163 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, Slidell Radar S, LA at 00:00Z on 2011-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2774 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2011-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 267 square meters per square second.1939587897Sfc1 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
2774 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
697 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
267 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
5.3
Supercell composite
18.2

Open this sounding in Storm Lab

The text

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

123 
WUUS54 KMOB 160259
SVRMOB
ALC003-025-097-099-129-MSC039-041-160400-
/O.NEW.KMOB.SV.W.0048.110416T0259Z-110416T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
959 PM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...  
  NORTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  SOUTH CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...  
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  SOUTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1100 PM CDT

* AT 954 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 13 MILES SOUTH OF JACKSON TO 11 MILES SOUTHWEST  OF           
  CITRONELLE TO 16 MILES EAST OF WIGGINS...AND MOVING EAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CHOCTAW BLUFF...PINEOLA AND MOUNT VERNON AROUND 1010 PM CDT...
  MT PLEASANT AND MOUNT PLEASANT AROUND 1015 PM CDT...
  LUCEDALE AROUND 1020 PM CDT...
  HOMEWOOD AROUND 1025 PM CDT...
  CARNEY AROUND 1030 PM CDT...
  I65 AND AL 225 AROUND 1055 PM CDT...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 12 AND 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SATURDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3091 8886 3091 8883 3094 8882 3105 8883
      3111 8855 3119 8839 3140 8825 3140 8759
      3125 8761 3101 8761 3095 8759 3087 8763
      3076 8753 3081 8887
TIME...MOT...LOC 0257Z 267DEG 36KT 3133 8791 3109 8817
          3100 8836 3092 8867 3093 8885

$$
1 follow-up statement
865 
WWUS54 KMOB 160331
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1031 PM CDT FRI APR 15 2011

ALC003-025-097-099-129-MSC039-041-160400-
/O.CON.KMOB.SV.W.0048.000000T0000Z-110416T0400Z/
WASHINGTON AL-MONROE AL-CLARKE AL-GEORGE MS-GREENE MS-BALDWIN AL-
MOBILE AL-
1031 PM CDT FRI APR 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR NORTHERN MOBILE...NORTHERN BALDWIN...SOUTHERN GREENE...GEORGE...
SOUTH CENTRAL CLARKE...SOUTHWESTERN MONROE AND SOUTHEASTERN
WASHINGTON COUNTIES...

AT 1026 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS 
OVER 60 MPH.  THESE STORMS WERE ALONG A LINE EXTENDING FROM 16 MILES 
SOUTHEAST OF JACKSON TO 9 MILES SOUTHEAST OF CITRONELLE TO 14 
MILES WEST OF LUCEDALE...MOVING EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  HOMEWOOD...CROSSROADS...LATHAM AND BLACKSHER AROUND 1035 PM CDT...
  SERANGE AND BUCKS AROUND 1040 PM CDT...
  BOOTHETOWN...TURNERVILLE...REDTOWN AND LUCEDALE AROUND 1045 PM
  CDT...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE LOWEST
FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A
ROOM SUCH AS A CLOSET OR BATHROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT SATURDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3091 8886 3091 8883 3094 8882 3102 8882
      3105 8846 3114 8833 3122 8818 3127 8801
      3139 8788 3140 8759 3125 8761 3102 8761
      3095 8759 3088 8763 3076 8753 3081 8887
TIME...MOT...LOC 0330Z 267DEG 36KT 3136 8765 3110 8785
          3102 8808 3095 8841 3091 8877

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 7:14 PM CDTTornado WarningMOBWashington36 min
Apr 15, 7:24 PM CDTTornado Warning EmergencyMOBMobile, Washington51 min
Apr 15, 7:36 PM CDTSevere Thunderstorm WarningMOBWilcox39 min
Apr 15, 7:39 PM CDTTornado WarningMOBClarke, Monroe, Wilcox29 min
Apr 15, 7:54 PM CDTTornado WarningMOBClarke, Monroe, Wilcox51 min
Apr 15, 8:11 PM CDTTornado Warning EmergencyMOBWashington49 min
Apr 15, 8:28 PM CDTTornado WarningMOBWashington47 min
Apr 15, 8:50 PM CDTTornado WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington55 min
Apr 15, 9:15 PM CDTSevere Thunderstorm WarningMOBClarke, Mobile, Washington45 min
Apr 15, 9:18 PM CDTFlash Flood WarningMOBWashington117 min
Apr 15, 9:38 PM CDTTornado WarningMOBConecuh, Monroe52 min
Apr 15, 9:41 PM CDTTornado WarningMOBClarke, Washington49 min
Apr 15, 10:05 PM CDTTornado WarningMOBBaldwin, Clarke, Mobile, Monroe, Washington55 min
Apr 15, 10:24 PM CDTTornado WarningMOBButler, Clarke, Conecuh, Monroe, Wilcox51 min
Apr 15, 10:32 PM CDTTornado WarningMOBBaldwin, Mobile33 min
Apr 15, 10:56 PM CDTSevere Thunderstorm WarningMOBBaldwin, Conecuh, Escambia, Mobile, Monroe64 min
Apr 15, 10:59 PM CDTTornado WarningMOBBaldwin, Conecuh, Escambia, Monroe61 min
Apr 15, 11:10 PM CDTTornado WarningMOBButler, Crenshaw16 min
Apr 15, 11:33 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw42 min
Apr 15, 11:45 PM CDTTornado WarningMOBConecuh, Covington, Escambia60 min
Apr 16, 12:00 AM CDTSevere Thunderstorm WarningMOBButler, Conecuh, Covington, Crenshaw60 min
Apr 16, 12:11 AM CDTSevere Thunderstorm WarningMOBCrenshaw32 min
Apr 16, 12:38 AM CDTTornado WarningMOBCovington52 min
Apr 16, 1:01 AM CDTSevere Thunderstorm WarningMOBCovington33 min
Apr 15, 7:53 PM CDTTornado WarningMOBGreene, Perry37 min
Apr 15, 8:36 PM CDTTornado WarningMOBGreene, Perry54 min
Apr 15, 8:42 PM CDTTornado WarningMOBGeorge, Greene, Perry63 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011Severe Thunderstorm Warnings in Mississippi, 2011Every 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.