Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 159, NWS Mobile, AL

May 1, 2017Covington County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 1, 2017, 6:01 AM CDT for Covington County, Crenshaw County, Alabama. It was in force for 17 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
May 1, 2017, 6:01 AM CDT (11:01 UTC)
Expired
May 1, 2017, 6:18 AM CDT
In force
17 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Covington County, AL, Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 74 km from the middle of the area, began a volume at 11:00 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 00:00Z, 11.0 hours before the alert went out and 200 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 00:00Z on 2017-05-01Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2017-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
748 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

552 
WUUS54 KMOB 011101
SVRMOB
ALC039-041-011130-
/O.NEW.KMOB.SV.W.0159.170501T1101Z-170501T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
601 AM CDT MON MAY 1 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Southeastern Crenshaw County in south central Alabama...
  Northeastern Covington County in south central Alabama...

* Until 630 AM CDT

* At 601 AM CDT, a severe thunderstorm was located near Opp, moving
  northeast at 35 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Opp and Brantley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3153 8616 3153 8620 3127 8619 3119 8635
      3128 8646 3163 8629 3154 8614
TIME...MOT...LOC 1101Z 225DEG 31KT 3132 8634 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$
1 follow-up statement
067 
WWUS54 KMOB 011118
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
618 AM CDT MON MAY 1 2017

ALC039-041-011127-
/O.CAN.KMOB.SV.W.0159.000000T0000Z-170501T1130Z/
Crenshaw AL-Covington AL-
618 AM CDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CRENSHAW AND
NORTHEASTERN COVINGTON COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mobile.

LAT...LON 3153 8616 3153 8620 3127 8619 3119 8635
      3128 8646 3163 8629 3154 8614
TIME...MOT...LOC 1116Z 225DEG 31KT 3142 8622 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:11 PM CDTSpecial Weather StatementMOBButler, Covington, Crenshaw64 min
Apr 30, 7:23 PM CDTAreal Flood AdvisoryMOBMobile3 hr
Apr 30, 7:39 PM CDTSpecial Marine WarningMOB66 min
Apr 30, 8:07 PM CDTFlash Flood WarningMOBMobile6 hr
Apr 30, 8:29 PM CDTAreal Flood AdvisoryMOBButler, Covington, Crenshaw3 hr
Apr 30, 8:35 PM CDTSpecial Marine WarningMOB85 min
Apr 30, 8:36 PM CDTHigh Wind WarningMOBBaldwin, Mobile3 hr
Apr 30, 9:13 PM CDTFlash Flood WarningMOBBaldwin, Mobile6 hr
Apr 30, 9:47 PM CDTSpecial Marine WarningMOB88 min
Apr 30, 10:46 PM CDTSpecial Weather StatementMOBChoctaw59 min
Apr 30, 10:54 PM CDTSpecial Weather StatementMOBBaldwin36 min
Apr 30, 10:58 PM CDTSpecial Marine WarningMOB92 min
Apr 30, 11:02 PM CDTSevere Thunderstorm WarningMOBChoctaw43 min
Apr 30, 11:06 PM CDTSpecial Marine WarningMOB54 min
Apr 30, 11:13 PM CDTWind AdvisoryMOBBaldwin, Butler, Conecuh, Covington, Crenshaw, Escambia and 2 more8 hr
Apr 30, 11:31 PM CDTSpecial Marine WarningMOB59 min
Apr 30, 11:41 PM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke49 min
Apr 30, 11:53 PM CDTSpecial Weather StatementMOBClarke, Washington67 min
Apr 30, 11:55 PM CDTSpecial Marine WarningMOB95 min
May 1, 12:13 AM CDTSevere Thunderstorm WarningMOBClarke, Wilcox47 min
May 1, 12:23 AM CDTSpecial Marine WarningMOB67 min
May 1, 12:56 AM CDTSpecial Weather StatementMOBClarke, Washington49 min
May 1, 1:23 AM CDTSpecial Marine WarningMOB97 min
May 1, 1:25 AM CDTSpecial Marine WarningMOB95 min
May 1, 2:01 AM CDTSpecial Weather StatementMOBMonroe44 min
May 1, 2:56 AM CDTSpecial Marine WarningMOB64 min
May 1, 2:58 AM CDTSpecial Marine WarningMOB2 hr
May 1, 3:31 AM CDTSpecial Weather StatementMOBEscambia44 min
May 1, 3:47 AM CDTSpecial Weather StatementMOBBaldwin43 min
May 1, 3:53 AM CDTSpecial Marine WarningMOB2 hr
May 1, 5:08 AM CDTSpecial Marine WarningMOB112 min
May 1, 5:12 AM CDTRip Current StatementMOBBaldwin, Mobile20 hr
May 1, 5:25 AM CDTSpecial Weather StatementMOBCovington50 min
May 1, 5:48 AM CDTSpecial Weather StatementMOBCrenshaw42 min
May 1, 6:01 AM CDTSpecial Marine WarningMOB59 min
May 1, 6:52 AM CDTSpecial Weather StatementMOBCovington38 min
May 1, 7:00 AM CDTSpecial Marine WarningMOB2 hr

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.