Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Birmingham, AL

March 16, 2021Marengo County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 16, 2021, 3:22 AM CDT for Marengo County, Alabama. It was in force for 38 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 16, 2021, 3:22 AM CDT (08:22 UTC)
Expired: Mar 16, 2021, 4:00 AM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Marengo County, AL

The radar

The Birmingham radar (KBMX), 124 km from the middle of the area, began a volume at 08:25 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, 8.4 hours before the alert went out and 124 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: 1448 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

116 
WUUS54 KBMX 160822
SVRBMX
ALC091-160900-
/O.NEW.KBMX.SV.W.0003.210316T0822Z-210316T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
322 AM CDT Tue Mar 16 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southeastern Marengo County in southwestern Alabama...

* Until 400 AM CDT.

* At 322 AM CDT, a severe thunderstorm was located near Linden,
  moving east at 25 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...
  Linden, Uniontown, Thomaston, Sweet Water, Dayton, Freddie Jones
  Field, Miller, Consul, Calvary and Octagon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3246 8752 3231 8752 3231 8747 3227 8747
      3227 8751 3225 8752 3219 8752 3211 8786
      3228 8794
TIME...MOT...LOC 0822Z 249DEG 23KT 3223 8782 

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

25/Owen

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 9:32 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	19 min
Mar 16, 1:18 AM CDT	Special Weather Statement	BMX	Marion	57 min
Mar 16, 1:59 AM CDT	Special Weather Statement	BMX	Marion	31 min
Mar 16, 2:20 AM CDT	Special Weather Statement	BMX	Marengo	40 min
Mar 16, 3:15 AM CDT	Special Weather Statement	BMX	Marengo	30 min
Mar 16, 3:32 AM CDT	Areal Flood Advisory	BMX	Marengo	3 hr
Mar 16, 3:41 AM CDT	Tornado Warning	BMX	Marengo	34 min
Mar 16, 6:09 AM CDT	Special Weather Statement	BMX	Dallas	51 min
Mar 16, 9:44 AM CDT	Areal Flood Advisory	BMX	Marengo	3 hr
Mar 16, 10:06 AM CDT	River Flood Warning	BMX	Greene, Hale, Marengo	7 days
Mar 16, 10:58 AM CDT	Areal Flood Advisory	BMX	Dallas, Perry	3 hr
Mar 16, 12:06 PM CDT	Areal Flood Advisory	BMX	Dallas	3 hr
Mar 16, 12:58 PM CDT	Special Weather Statement	BMX	Lowndes	47 min
Mar 16, 1:24 PM CDT	Special Weather Statement	BMX	Montgomery	36 min
Mar 16, 2:00 PM CDT	Special Weather Statement	BMX	Bullock	45 min
Mar 16, 2:24 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Pike	36 min
Mar 16, 3:00 PM CDT	Special Weather Statement	BMX	Barbour	45 min
Mar 16, 3:41 PM CDT	Special Weather Statement	BMX	Barbour	49 min
Mar 16, 4:46 PM CDT	Areal Flood Advisory	BMX	Barbour, Bullock, Pike	3 hr
Mar 16, 5:33 PM CDT	Special Weather Statement	BMX	Greene	27 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.