Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 16, NWS Mobile, AL

March 8, 2011Mobile County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 8, 2011, 7:11 PM CST for Mobile County, Washington County, Alabama. It was in force for 34 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
Mar 8, 2011, 7:11 PM CST (01:11 UTC)
Expired
Mar 8, 2011, 7:45 PM CST
In force
34 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Mobile County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 58 km from the middle of the area, began a volume at 01:13 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
Mar 8, 7:18 PM CSTHAIL 1Citronelle, ALQUARTER SIZE HAIL REPORTED IN CITRONELLE, ALABAMA.

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 00:00Z, 1.2 hours before the alert went out and 187 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 2011-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 841 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 652 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
841 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
473 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
652 m²/s²
0-3 km storm-relative helicity
774 m²/s²
Significant tornado parameter
4.0
Supercell composite
24.8

Open this sounding in Storm Lab

The text

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

846 
WUUS54 KMOB 090111
SVRMOB
ALC097-129-090145-
/O.NEW.KMOB.SV.W.0016.110309T0111Z-110309T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
711 PM CST TUE MAR 8 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF CITRONELLE...
  SOUTHEASTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 745 PM CST

* AT 703 PM CST...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 7 MILES
  SOUTH OF CITRONELLE...OR 11 MILES NORTH OF LOTT AND COLEMAN D...AND
  MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PINEOLA AROUND 720 PM CST...
  MCINTOSH AROUND 740 PM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 3104 8838 3135 8807 3128 8797 3126 8798
      3125 8794 3125 8793 3122 8793 3119 8794
      3092 8823
TIME...MOT...LOC 0111Z 222DEG 33KT 3105 8823

$$

PURDY
2 follow-up statements
881 
WWUS54 KMOB 090136
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
736 PM CST TUE MAR 8 2011

ALC097-129-090145-
/O.CON.KMOB.SV.W.0016.000000T0000Z-110309T0145Z/
WASHINGTON AL-MOBILE AL-
736 PM CST TUE MAR 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CST
FOR NORTHERN MOBILE AND SOUTHEASTERN WASHINGTON COUNTIES...

AT 727 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT ON RADAR A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS OVER 60 MPH.  THIS STORM WAS NEAR
CHESTANG...OR ABOUT 9 MILES NORTHEAST OF CITRONELLE...MOVING
NORTHEAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MALCOLM AND CALVERT AROUND 735 PM CST...
  MCINTOSH AROUND 740 PM CST...

QUARTER SIZE HAIL WITH THIS STORM HAS JUST BEEN REPORTED BY THE 
PUBLIC NEAR CITRONELLE. SEEK SHELTER INSIDE A STURDY STRUCTURE AND 
STAY AWAY FROM WINDOWS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 3104 8838 3135 8807 3128 8797 3126 8798
      3125 8794 3125 8793 3122 8793 3119 8794
      3092 8823
TIME...MOT...LOC 0130Z 222DEG 33KT 3118 8809

$$
160 
WWUS54 KMOB 090152
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
752 PM CST TUE MAR 8 2011

ALC097-129-090159-
/O.EXP.KMOB.SV.W.0016.000000T0000Z-110309T0145Z/
WASHINGTON AL-MOBILE AL-
752 PM CST TUE MAR 8 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MOBILE AND
SOUTHEASTERN WASHINGTON COUNTIES HAS EXPIRED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING FOR NORTHERN 
MOBILE AND SOUTHEASTERN WASHINGTON COUNTIES HAS WEAKENED BELOW 
SEVERE CRITERIA. HOWEVER...THIS STORM STILL HAS THE POTENTIAL TO 
PRODUCE GUSTY WINDS OF 45 MPH AND SMALL HAIL AS IT MOVES NORTHEAST 
ACROSS EXTREME NORTHERN BALDWIN AND EXTREME SOUTHERN CLARKE COUNTIES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST WEDNESDAY MORNING
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3104 8838 3135 8807 3128 8797 3126 8798
      3125 8794 3125 8793 3122 8793 3119 8794
      3092 8823
TIME...MOT...LOC 0136Z 222DEG 33KT 3122 8805

$$

PURDY

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 8:23 PM CSTSevere Thunderstorm WarningMOBWashington37 min
Mar 8, 9:04 PM CSTSevere Thunderstorm WarningMOBClarke, Washington41 min
Mar 8, 9:44 PM CSTSevere Thunderstorm WarningMOBClarke, Washington, Wilcox46 min
Mar 9, 1:32 AM CSTFlash Flood WarningMOBChoctaw118 min
Mar 9, 4:20 AM CSTFlash Flood WarningMOBChoctaw6 hr
Mar 9, 4:22 AM CSTSevere Thunderstorm WarningMOBChoctaw38 min
Mar 9, 4:32 AM CSTTornado WarningMOBChoctaw33 min
Mar 9, 5:07 AM CSTFlash Flood WarningMOBChoctaw6 hr
Mar 9, 5:40 AM CSTTornado WarningMOBChoctaw, Clarke33 min
Mar 9, 5:51 AM CSTFlash Flood WarningMOBClarke, Washington, Wilcox6 hr
Mar 9, 6:37 AM CSTTornado WarningMOBWashington17 min
Mar 9, 7:08 AM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile, Washington52 min
Mar 9, 7:26 AM CSTFlash Flood WarningMOBBaldwin, Clarke, Mobile, Washington6 hr
Mar 9, 7:33 AM CSTFlash Flood WarningMOBMonroe6 hr
Mar 9, 7:52 AM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile83 min
Mar 9, 7:54 AM CSTSpecial Marine WarningMOB81 min
Mar 9, 8:01 AM CSTTornado WarningMOBBaldwin, Mobile44 min
Mar 9, 8:14 AM CSTSevere Thunderstorm WarningMOBConecuh, Covington, Escambia61 min
Mar 9, 8:27 AM CSTTornado WarningMOBBaldwin, Mobile63 min
Mar 9, 8:35 AM CSTTornado WarningMOBConecuh, Covington, Escambia40 min
Mar 9, 8:41 AM CSTFlash Flood WarningMOBBaldwin, Mobile4 hr
Mar 9, 8:48 AM CSTFlash Flood WarningMOBConecuh, Escambia5 hr
Mar 9, 8:50 AM CSTSevere Thunderstorm WarningMOBButler, Conecuh, Covington, Crenshaw40 min
Mar 9, 9:02 AM CSTSevere Thunderstorm WarningMOBBaldwin, Escambia58 min
Mar 9, 9:10 AM CSTSevere Thunderstorm WarningMOBButler, Conecuh, Covington, Crenshaw, Escambia65 min
Mar 9, 9:10 AM CSTTornado WarningMOBBaldwin50 min
Mar 9, 9:16 AM CSTTornado WarningMOBBaldwin44 min
Mar 9, 9:16 AM CSTTornado WarningMOBCovington59 min
Mar 9, 9:19 AM CSTSpecial Marine WarningMOB116 min
Mar 9, 9:23 AM CSTSpecial Marine WarningMOB97 min
Mar 9, 9:25 AM CSTFlash Flood WarningMOBBaldwin6 hr
Mar 9, 9:26 AM CSTTornado WarningMOBBaldwin, Escambia49 min
Mar 9, 9:26 AM CSTTornado WarningMOBCovington, Crenshaw26 min
Mar 9, 9:36 AM CSTFlash Flood WarningMOBConecuh, Covington, Escambia114 min
Mar 9, 9:40 AM CSTTornado WarningMOBBaldwin50 min
Mar 9, 9:44 AM CSTAreal Flood AdvisoryMOBButler, Conecuh, Covington, Crenshaw4 hr
Mar 9, 9:54 AM CSTTornado WarningMOBCovington25 min
Mar 9, 10:09 AM CSTSevere Thunderstorm WarningMOBCovington66 min
Mar 9, 10:22 AM CSTAreal Flood WarningMOBChoctaw5 hr
Mar 9, 10:55 AM CSTSpecial Marine WarningMOB80 min
Mar 9, 11:00 AM CSTAreal Flood WarningMOBChoctaw5 hr
Mar 9, 11:14 AM CSTTornado WarningMOBBaldwin61 min
Mar 9, 11:30 AM CSTRiver Flood WarningMOBClarke, Monroe, Wilcox10 days
Mar 9, 11:54 AM CSTAreal Flood AdvisoryMOBConecuh, Covington, Escambia111 min
Mar 9, 11:58 AM CSTSpecial Marine WarningMOB2 hr
Mar 9, 12:00 PM CSTAreal Flood WarningMOBClarke, Washington, Wilcox4 hr
Mar 9, 2:02 PM CSTSpecial Marine WarningMOB58 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.