Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 25, NWS Mobile, AL

March 18, 2021Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 18, 2021, 12:32 AM CDT for Baldwin County, Alabama. It was in force for 28 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: Mar 18, 2021, 12:32 AM CDT (05:32 UTC)
Expired: Mar 18, 2021, 1:00 AM CDT
In force: 28 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 46 km from the middle of the area, began a volume at 05:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 17, 6:48 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.5 hours before the alert went out and 175 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1681 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 9.7

Open this sounding in Storm Lab

The text

As transmitted.

785 
WUUS54 KMOB 180532
SVRMOB
ALC003-180600-
/O.NEW.KMOB.SV.W.0025.210318T0532Z-210318T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1232 AM CDT Thu Mar 18 2021

The National Weather Service in Mobile has issued a

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

* Until 100 AM CDT.

* At 1232 AM CDT, severe thunderstorms were located along a line
  extending from 6 miles southwest of Point Clear to 7 miles east of
  Alabama Port to near Fort Morgan, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Foley, Robertsdale, Point Clear, Magnolia Springs, Summerdale,
  Silverhill and Elberta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 AM CDT for southwestern
Alabama.

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

&&

LAT...LON 3034 8809 3040 8811 3044 8810 3060 8765
      3058 8758 3045 8752 3037 8758 3025 8808
      3026 8809
TIME...MOT...LOC 0532Z 247DEG 46KT 3042 8801 3034 8799 3027 8803 

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

Black

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 7:10 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Washington	65 min
Mar 17, 8:07 PM CDT	Special Weather Statement	MOB	Choctaw, Washington	53 min
Mar 17, 8:31 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Washington, Wilcox	44 min
Mar 17, 9:15 PM CDT	Special Weather Statement	MOB	Butler, Monroe, Wilcox	45 min
Mar 17, 9:27 PM CDT	Special Weather Statement	MOB	Clarke, Monroe, Washington	48 min
Mar 17, 9:55 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	50 min
Mar 17, 10:17 PM CDT	Special Weather Statement	MOB	Monroe, Washington	58 min
Mar 17, 10:31 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Mobile, Monroe, Washington	44 min
Mar 17, 11:12 PM CDT	Special Weather Statement	MOB	Baldwin, Mobile	48 min
Mar 17, 11:28 PM CDT	Special Marine Warning	MOB		92 min
Mar 18, 12:02 AM CDT	Special Weather Statement	MOB	Monroe	43 min
Mar 18, 12:07 AM CDT	Special Weather Statement	MOB	Mobile	23 min
Mar 18, 12:33 AM CDT	Special Marine Warning	MOB		87 min
Mar 18, 12:38 AM CDT	Special Weather Statement	MOB	Butler	37 min
Mar 18, 12:57 AM CDT	Special Marine Warning	MOB		63 min
Mar 18, 1:48 AM CDT	Special Marine Warning	MOB		87 min
Mar 18, 3:16 AM CDT	Special Marine Warning	MOB		89 min
Mar 18, 4:00 AM CDT	Tornado Warning	MOB	Crenshaw	30 min
Mar 18, 4:09 AM CDT	Special Marine Warning	MOB		51 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Every severe thunderstorm warning in 2021

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.