Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Birmingham, AL

March 15, 2021Etowah County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 15, 2021, 9:32 PM CDT for Etowah County, Alabama. It was in force for 19 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 15, 2021, 9:32 PM CDT (02:32 UTC)
Expired: Mar 15, 2021, 9:51 PM CDT
In force: 19 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Etowah County, AL

The radar

The Northeast Alabama radar (KHTX), 107 km from the middle of the area, began a volume at 02:33 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.

What was reported inside it

Time	Report	Where	Remark
Mar 15, 9:37 PM CDT	HAIL 1	1 Nw Gadsden Mall, AL	A COUPLE REPORTS OF HAIL AT QUARTER SIZE IN THE GADSDEN AREA.
Mar 15, 9:42 PM CDT	HAIL 0.7	1 Ene Gadsden Mall, AL	DIME SIZED HAIL REPORTED AT GADSDEN LOWES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 2.5 hours before the alert went out and 123 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.

050 
WUUS54 KBMX 160232
SVRBMX
ALC055-160315-
/O.NEW.KBMX.SV.W.0002.210316T0232Z-210316T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
932 PM CDT Mon Mar 15 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southeastern Etowah County in northeastern Alabama...

* Until 1015 PM CDT.

* At 932 PM CDT, a severe thunderstorm was located over Attalla,
  moving east at 35 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...
  Gadsden, Rainbow City, Attalla, Hokes Bluff, Glencoe, Ballplay,
  Gadsden Mall, Noccalula Falls, Neely Henry Lake, Southside, Gadsden
  Steam Plant, Big Wills Creek, Gadsden Municipal Airport, Gadsden
  Water Works, Reaves and Ramsey.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3410 8580 3399 8574 3395 8574 3394 8580
      3396 8584 3395 8585 3395 8588 3394 8588
      3394 8590 3393 8590 3391 8614 3401 8618
      3412 8579
TIME...MOT...LOC 0232Z 258DEG 31KT 3398 8609 

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

87/GRANTHAM

2 follow-up statements

903 
WWUS54 KBMX 160240
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
940 PM CDT Mon Mar 15 2021

ALC055-160315-
/O.CON.KBMX.SV.W.0002.000000T0000Z-210316T0315Z/
Etowah AL-
940 PM CDT Mon Mar 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTHEASTERN ETOWAH COUNTY...

At 940 PM CDT, a severe thunderstorm was located over Gadsden Mall,
or over Gadsden, moving east at 35 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...
Gadsden, Rainbow City, Attalla, Hokes Bluff, Glencoe, Ballplay,
Gadsden Mall, Noccalula Falls, Neely Henry Lake, Southside, Gadsden
Steam Plant, Big Wills Creek, Gadsden Water Works, Reaves and Gadsden
Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3392 8608 3403 8610 3412 8579 3410 8580
      3399 8574 3395 8574 3394 8580 3396 8584
      3395 8585 3395 8588 3394 8588 3394 8590
      3393 8590
TIME...MOT...LOC 0240Z 258DEG 31KT 3399 8601 

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

87/GRANTHAM

144 
WWUS54 KBMX 160251
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
951 PM CDT Mon Mar 15 2021

ALC055-160301-
/O.CAN.KBMX.SV.W.0002.000000T0000Z-210316T0315Z/
Etowah AL-
951 PM CDT Mon Mar 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ETOWAH COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3392 8608 3403 8610 3412 8579 3410 8580
      3399 8574 3395 8574 3394 8580 3396 8584
      3395 8585 3395 8588 3394 8588 3394 8590
      3393 8590
TIME...MOT...LOC 0251Z 258DEG 31KT 3401 8589 

$$

87/GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 3:22 AM CDT	Severe Thunderstorm Warning	BMX	Marengo	38 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.