Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 77, NWS Mobile, AL

February 7, 20174 counties in Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 7, 2017, 11:33 AM CST for 4 counties in Alabama. It was in force for 42 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
Feb 7, 2017, 11:33 AM CST (17:33 UTC)
Expired
Feb 7, 2017, 12:15 PM CST
In force
42 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Clarke County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 118 km from the middle of the area, began a volume at 17:34 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, 5.6 hours before the alert went out and 193 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, Birmingham, AL at 12:00Z on 2017-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2017-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
880 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

841 
WUUS54 KMOB 071733
SVRMOB
ALC025-099-129-131-071815-
/O.NEW.KMOB.SV.W.0077.170207T1733Z-170207T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1133 AM CST TUE FEB 7 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Monroe County in south central Alabama...
  Northeastern Washington County in southwestern Alabama...
  Central Clarke County in southwestern Alabama...
  South central Wilcox County in south central Alabama...

* Until 1215 PM CST

* At 1133 AM CST, a severe thunderstorm was located near Jackson,
  moving east at 55 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Monroeville, Jackson, Grove Hill, Wagarville, Leroy and Whatley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3146 8727 3143 8803 3171 8805 3187 8737
TIME...MOT...LOC 1733Z 255DEG 50KT 3157 8794 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
021 
WWUS54 KMOB 071805
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1205 PM CST TUE FEB 7 2017

ALC025-129-071814-
/O.CAN.KMOB.SV.W.0077.000000T0000Z-170207T1815Z/
Washington AL-Clarke AL-
1205 PM CST TUE FEB 7 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHINGTON AND
CENTRAL CLARKE COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 600 PM CST for south central
and southwestern Alabama.

Additional statements will be issued as conditions warrant.

LAT...LON 3146 8727 3145 8757 3148 8757 3151 8762
      3155 8757 3170 8757 3170 8752 3181 8752
      3182 8750 3183 8750 3183 8754 3187 8737
TIME...MOT...LOC 1804Z 255DEG 50KT 3168 8744 

$$

ALC099-131-071815-
/O.CON.KMOB.SV.W.0077.000000T0000Z-170207T1815Z/
Monroe AL-Wilcox AL-
1205 PM CST TUE FEB 7 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CST
FOR CENTRAL MONROE AND SOUTH CENTRAL WILCOX COUNTIES...

At 1204 PM CST, a severe thunderstorm was located 12 miles southwest
of Vredenburgh, or 12 miles northwest of Monroeville, moving east at
60 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Monroeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 600 PM CST for south central
and southwestern Alabama.

LAT...LON 3146 8727 3145 8757 3148 8757 3151 8762
      3155 8757 3170 8757 3170 8752 3181 8752
      3182 8750 3183 8750 3183 8754 3187 8737
TIME...MOT...LOC 1804Z 255DEG 50KT 3168 8744 

HAIL...1.00IN
WIND...60MPH
 
$$

Butts

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 7, 5:58 AM CSTRip Current StatementMOBBaldwin, Mobile42 hr
Feb 7, 10:16 AM CSTSevere Thunderstorm WarningMOBChoctaw, Washington59 min
Feb 7, 10:29 AM CSTSpecial Weather StatementMOBClarke46 min
Feb 7, 10:47 AM CSTSpecial Weather StatementMOBMobile28 min
Feb 7, 10:57 AM CSTSpecial Marine WarningMOB33 min
Feb 7, 11:17 AM CSTSpecial Weather StatementMOBClarke, Washington43 min
Feb 7, 12:06 PM CSTSpecial Weather StatementMOBEscambia39 min
Feb 7, 12:12 PM CSTSpecial Weather StatementMOBConecuh, Monroe33 min
Feb 7, 12:34 PM CSTSpecial Marine WarningMOB41 min
Feb 7, 12:42 PM CSTSpecial Marine WarningMOB63 min
Feb 7, 12:49 PM CSTSpecial Weather StatementMOBButler, Crenshaw41 min
Feb 7, 1:00 PM CSTSpecial Weather StatementMOBBaldwin, Mobile30 min
Feb 7, 1:06 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile39 min
Feb 7, 1:11 PM CSTSevere Thunderstorm WarningMOBMobile49 min
Feb 7, 1:21 PM CSTAreal Flood AdvisoryMOBMobile3 hr
Feb 7, 1:27 PM CSTSpecial Weather StatementMOBBaldwin48 min
Feb 7, 1:44 PM CSTSpecial Marine WarningMOB46 min
Feb 7, 1:46 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile44 min
Feb 7, 1:49 PM CSTSpecial Marine WarningMOB56 min
Feb 7, 1:52 PM CSTSpecial Weather StatementMOBConecuh38 min
Feb 7, 2:02 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile58 min
Feb 7, 2:20 PM CSTSpecial Weather StatementMOBButler, Conecuh, Crenshaw40 min
Feb 7, 2:26 PM CSTSpecial Weather StatementMOBCovington, Escambia49 min
Feb 7, 2:30 PM CSTSpecial Marine WarningMOB45 min
Feb 7, 2:32 PM CSTSpecial Marine WarningMOB58 min
Feb 7, 2:33 PM CSTSpecial Marine WarningMOB42 min
Feb 7, 2:45 PM CSTSpecial Marine WarningMOB60 min
Feb 7, 2:49 PM CSTSmall Craft AdvisoryMOB9 hr
Feb 7, 2:57 PM CSTAreal Flood AdvisoryMOBBaldwin, Mobile3 hr
Feb 7, 2:58 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile62 min
Feb 7, 3:01 PM CSTSevere Thunderstorm WarningMOBBaldwin59 min
Feb 7, 3:10 PM CSTSpecial Weather StatementMOBCovington35 min
Feb 7, 3:14 PM CSTSpecial Marine WarningMOB61 min
Feb 7, 3:27 PM CSTSpecial Marine WarningMOB63 min
Feb 7, 3:40 PM CSTSpecial Marine WarningMOB65 min
Feb 7, 3:59 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile46 min
Feb 7, 4:04 PM CSTSevere Thunderstorm WarningMOBBaldwin41 min
Feb 7, 4:14 PM CSTSpecial Marine WarningMOB61 min
Feb 7, 4:25 PM CSTSpecial Marine WarningMOB65 min
Feb 7, 4:44 PM CSTSevere Thunderstorm WarningMOBBaldwin35 min
Feb 7, 4:48 PM CSTSpecial Marine WarningMOB27 min
Feb 7, 4:49 PM CSTSpecial Weather StatementMOBWilcox41 min
Feb 7, 5:02 PM CSTSpecial Weather StatementMOBConecuh43 min
Feb 7, 5:12 PM CSTSpecial Marine WarningMOB63 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017Every severe thunderstorm warning in 2017

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.