Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 66, NWS Mobile, AL

April 13, 2021Mobile County, Alabama; George County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 13, 2021, 5:18 PM CDT for Mobile County, Alabama; George County, Mississippi. It was in force for 57 min. 1 report 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: Apr 13, 2021, 5:18 PM CDT (22:18 UTC)
Expired: Apr 13, 2021, 6:15 PM CDT
In force: 57 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Mobile County, AL, George County, MS

The radar

The Mobile radar (KMOB), 21 km from the middle of the area, began a volume at 22:19 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
Apr 13, 6:23 PM CDT	NON-TSTM WND GST 40	1 Wnw Mobile Regional A, AL	ASOS STATION KMOB MOBILE BATES FIELD AIRPORT MEASURED A WIND GUST OF 40 MPH.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.3 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1989 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

500 
WUUS54 KMOB 132218
SVRMOB
ALC097-MSC039-132315-
/O.NEW.KMOB.SV.W.0066.210413T2218Z-210413T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
518 PM CDT Tue Apr 13 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Mobile County in southwestern Alabama...
  Eastern George County in southeastern Mississippi...

* Until 615 PM CDT.

* At 518 PM CDT, a severe thunderstorm capable of producing damaging 
  winds was located 8 miles north of Wilmer, or 11 miles east of 
  Lucedale, moving east at 30 mph. This storm has a history of 
  producing wind gusts in excess of 50 mph. 

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Midtown Mobile, Downtown Mobile, Prichard, Saraland, Chickasaw,
  Satsuma, Creola, Chunchula, Semmes, Tanner Williams, I65 And I165,
  Mobile Regional Airport, Wilmer, I65 And AL 158 and I10 And I65.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3081 8863 3100 8852 3100 8842 3090 8797
      3085 8797 3088 8789 3087 8791 3079 8799
      3079 8796 3078 8797 3077 8802 3077 8795
      3073 8801 3071 8799 3076 8792 3070 8793
      3071 8788 3070 8791 3069 8793 3056 8795
TIME...MOT...LOC 2218Z 281DEG 26KT 3094 8840 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 2:43 AM CDT	Flash Flood Watch	MOB	Baldwin, Mobile	55 hr
Apr 13, 4:37 PM CDT	Special Weather Statement	MOB	Mobile, Washington	38 min
Apr 13, 4:57 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Mobile, Washington	63 min
Apr 13, 5:39 PM CDT	Special Marine Warning	MOB		81 min
Apr 13, 6:09 PM CDT	High Wind Warning	MOB	Baldwin, Escambia, Mobile	3 hr
Apr 13, 6:50 PM CDT	Gale Warning	MOB		3 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Severe Thunderstorm Warnings in Mississippi, 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.