Alert archive / Alabama / Special Marine Warnings in 2017

Special Marine Warning 21, NWS Mobile, AL

January 2, 2017

NWS Mobile, AL issued this special marine warning at Jan 2, 2017, 6:11 PM CST. It was in force for 34 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
Jan 2, 2017, 6:11 PM CST (00:11 UTC)
Expired
Jan 2, 2017, 6:45 PM CST
In force
34 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.0 in
Wind
34.0 mph

The radar

The Mobile radar (KMOB), 25 km from the middle of the area, began a volume at 00:13 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.2 hours before the alert went out and 164 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 2017-01-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 296 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 2017-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
296 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

826 
WHUS54 KMOB 030011
SMWMOB
GMZ630>632-030045-
/O.NEW.KMOB.MA.W.0021.170103T0011Z-170103T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOBILE AL
611 PM CST MON JAN 2 2017

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  MISSISSIPPI SOUND...
  NORTH MOBILE BAY...
  SOUTH MOBILE BAY...

* UNTIL 645 PM CST
    
* AT 610 PM CST...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 7 NM NORTH OF BATTLESHIP PARK TO NEAR MISSISSIPPI
  SOUND EAST OF PASCAGOULA...MOVING EAST AT 40 KNOTS.

  HAZARD...WIND GUSTS 34 KNOTS OR GREATER. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT WIND GUSTS IN EXCESS OF 34 KNOTS...SUDDENLY HIGHER 
           WAVES...FREQUENT LIGHTNING...AND HEAVY DOWNPOURS.  MAKE 
           SURE ALL ON BOARD ARE WEARING LIFE JACKETS. 

* LOCATIONS IMPACTED INCLUDE...
  FAIRHOPE PIER...EAST FOWL RIVER BRIDGE...DOG RIVER BRIDGE...
  PORTERSVILLE BAY...GAILLARD ISLAND...CENTRAL DAUPHIN ISLAND...
  MIDDLE BAY LIGHT...POINT CLEAR...BON SECOUR BAY AND ALABAMA PORT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST FOR SOUTHWESTERN
ALABAMA.

LAT...LON 3042 8837 3037 8816 3055 8812 3061 8815
      3068 8807 3077 8811 3082 8808 3087 8802
      3085 8788 3075 8788 3072 8784 3068 8789
      3049 8789 3043 8787 3049 8782 3049 8778
      3039 8774 3023 8785 3023 8826 3029 8839
TIME...MOT...LOC 0010Z 286DEG 36KT 3080 8802 3036 8834 

HAIL...0.00IN
WIND...>34KTS

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 6:03 PM CSTSpecial Marine WarningMOB42 min
Jan 2, 6:07 PM CSTSpecial Weather StatementMOBMobile23 min
Jan 2, 6:22 PM CSTSpecial Marine WarningMOB113 min
Jan 2, 6:44 PM CSTSevere Thunderstorm WarningMOBCovington31 min
Jan 2, 6:45 PM CSTSpecial Marine WarningMOB45 min
Jan 2, 6:47 PM CSTSpecial Marine WarningMOB43 min
Jan 2, 6:48 PM CSTSpecial Weather StatementMOBMobile27 min
Jan 2, 7:18 PM CSTDense Fog AdvisoryMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more8 hr
Jan 2, 7:18 PM CSTRiver Flood WarningMOBEscambia59 hr
Jan 2, 7:27 PM CSTSpecial Marine WarningMOB93 min
Jan 2, 7:27 PM CSTSpecial Marine WarningMOB63 min
Jan 2, 8:00 PM CSTSevere Thunderstorm WarningMOBBaldwin45 min
Jan 2, 8:05 PM CSTMarine Dense Fog AdvisoryMOB11 hr
Jan 2, 8:16 PM CSTSpecial Marine WarningMOB44 min
Jan 2, 9:00 PM CSTSpecial Marine WarningMOB60 min
Jan 2, 10:11 PM CSTRiver Flood WarningMOBBaldwin18 hr
Jan 3, 6:44 AM CSTRiver Flood WarningMOBEscambia17 hr
Jan 3, 10:13 AM CSTRiver Flood WarningMOBDallas, Monroe, Wilcox3 days
Jan 2, 7:42 PM CSTSpecial Weather StatementMOBEscambia, Santa Rosa48 min
Jan 2, 8:49 PM CSTSpecial Weather StatementMOBEscambia, Okaloosa41 min
Jan 2, 9:40 PM CSTSpecial Weather StatementMOBEscambia, Santa Rosa35 min
Jan 2, 7:26 PM CSTRiver Flood WarningMOBGeorge, Greene, Perry48 hr
Jan 2, 7:26 PM CSTRiver Flood WarningMOBGeorge, Greene, Wayne68 hr
Jan 3, 5:27 AM CSTDense Fog AdvisoryMOBGeorge, Greene, Perry, Stone, Wayne3 hr

Nearby

Special Marine Warnings in Alabama, 2017Every special marine 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.