Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 98, NWS Mobile, AL

September 3, 2018Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Sep 3, 2018, 6:40 PM CDT for Baldwin County, Alabama. It was in force for 35 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
Sep 3, 2018, 6:40 PM CDT (23:40 UTC)
Expired
Sep 3, 2018, 7:15 PM CDT
In force
35 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 57 km from the middle of the area, began a volume at 23:43 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 12:00Z, 11.7 hours before the alert went out and 203 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 12:00Z on 2018-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1676 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 12:00Z on 2018-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.1939Sfc1 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
1676 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
602 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

410 
WUUS54 KMOB 032340
SVRMOB
ALC003-040015-
/O.NEW.KMOB.SV.W.0098.180903T2340Z-180904T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
640 PM CDT MON SEP 3 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Baldwin County in southwestern Alabama...

* Until 715 PM CDT.

* At 640 PM CDT, a severe thunderstorm was located 12 miles east of
  Loxley, moving west at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Daphne, Spanish Fort, Loxley and Stapleton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3053 8796 3082 8798 3082 8797 3080 8756
      3078 8754 3074 8753 3073 8751 3072 8750
      3072 8748 3070 8747 3070 8746 3058 8747
TIME...MOT...LOC 2340Z 091DEG 34KT 3068 8756 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 7:01 PM CDTSpecial Marine WarningMOB89 min
Sep 2, 7:26 PM CDTSpecial Weather StatementMOBCovington64 min
Sep 2, 7:48 PM CDTSevere Thunderstorm WarningMOBCovington42 min
Sep 2, 8:47 PM CDTSpecial Marine WarningMOB43 min
Sep 2, 9:19 PM CDTSpecial Marine WarningMOB41 min
Sep 3, 4:34 AM CDTTropical Storm WarningMOBBaldwin, Mobile48 hr
Sep 3, 5:19 AM CDTFlash Flood WatchMOBBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 3 more58 hr
Sep 3, 10:32 AM CDTHurricane WatchMOBBaldwin, Mobile6 hr
Sep 3, 10:32 AM CDTStorm Surge WatchMOBBaldwin, Mobile42 hr
Sep 3, 4:15 PM CDTSpecial Marine WarningMOB45 min
Sep 3, 4:19 PM CDTHurricane WarningMOBBaldwin, Mobile34 hr
Sep 3, 4:19 PM CDTStorm Surge WarningMOBMobile36 hr
Sep 3, 4:51 PM CDTSpecial Marine WarningMOB54 min
Sep 3, 5:34 PM CDTSpecial Marine WarningMOB86 min
Sep 3, 5:39 PM CDTSpecial Marine WarningMOB96 min
Sep 3, 6:03 PM CDTSpecial Weather StatementMOBBaldwin, Escambia42 min
Sep 3, 6:50 PM CDTSpecial Marine WarningMOB85 min
Sep 3, 6:55 PM CDTSpecial Marine WarningMOB50 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2018Every severe thunderstorm warning in 2018

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.