Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Mobile, AL

March 17, 2021Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Mar 17, 2021, 6:19 PM CDT for Greene County, Perry County, Wayne County, Mississippi. It was in force for 56 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 17, 2021, 6:19 PM CDT (23:19 UTC)
Expired: Mar 17, 2021, 7:15 PM CDT
In force: 56 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 23:20 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, 11:36 AM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.3 hours before the alert went out and 139 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: 1786 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 644 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

As transmitted.

279 
WUUS54 KMOB 172319
SVRMOB
MSC041-111-153-180015-
/O.NEW.KMOB.SV.W.0018.210317T2319Z-210318T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
619 PM CDT Wed Mar 17 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Perry County in southeastern Mississippi...
  Western Wayne County in southeastern Mississippi...
  Western Greene County in southeastern Mississippi...

* Until 715 PM CDT.

* At 619 PM CDT, severe thunderstorms were located along a line
  extending from 3 miles south of Magee to 3 miles south of Sumrall
  to 7 miles northwest of Poplarville, moving northeast at 60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Richton, Clara, Beaumont, New Augusta and McLain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM CDT for southeastern
Mississippi.

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

Damaging winds and continuous cloud to ground lightning is occurring 
with these storms. Move indoors immediately. Lightning is one of 
nature's leading killers. Remember, if you can hear thunder, you are 
close enough to be struck by lightning.

&&

LAT...LON 3143 8915 3143 8894 3182 8894 3184 8873
      3162 8867 3100 8878 3100 8883 3096 8884
      3092 8889 3091 8914
TIME...MOT...LOC 2319Z 235DEG 50KT 3182 8975 3137 8956 3094 8958 

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

21/CL

1 follow-up statement

169 
WWUS54 KMOB 180000
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
700 PM CDT Wed Mar 17 2021

MSC041-111-153-180015-
/O.CON.KMOB.SV.W.0018.000000T0000Z-210318T0015Z/
Perry MS-Wayne MS-Greene MS-
700 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR PERRY...WESTERN WAYNE AND WESTERN GREENE COUNTIES...

At 658 PM CDT, severe thunderstorms were located along a line
extending from 4 miles northwest of Sandersville to 4 miles southeast
of Ovett to 5 miles southwest of New Augusta to 7 miles southwest of
Maxie, moving northeast at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Richton, Clara, Beaumont, New Augusta and McLain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 AM CDT for southeastern
Mississippi.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 3143 8915 3143 8894 3182 8894 3184 8873
      3162 8867 3100 8878 3100 8883 3096 8884
      3092 8889 3091 8914
TIME...MOT...LOC 2358Z 244DEG 46KT 3185 8907 3143 8899 3115 8910 3093
8931

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

21/CL

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 9:23 PM CDT	Areal Flood Warning	MOB	Wayne	16 hr
Mar 17, 4:27 AM CDT	Flash Flood Watch	MOB	Wayne	18 hr
Mar 17, 10:28 AM CDT	River Flood Warning	MOB	George, Greene, Wayne	21 days
Mar 17, 10:32 AM CDT	River Flood Warning	MOB	George, Greene, Perry	18 days
Mar 17, 11:41 AM CDT	Special Weather Statement	MOB	Wayne	49 min
Mar 17, 11:58 AM CDT	Tornado Warning	MOB	Wayne	47 min
Mar 17, 12:59 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	46 min
Mar 17, 1:30 PM CDT	Tornado Warning	MOB	Wayne	45 min
Mar 17, 2:03 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	42 min
Mar 17, 2:19 PM CDT	Flash Flood Warning	MOB	Wayne	6 hr
Mar 17, 2:34 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	56 min
Mar 17, 3:28 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	47 min
Mar 17, 3:46 PM CDT	Tornado Warning	MOB	Wayne	44 min
Mar 17, 4:04 PM CDT	Tornado Warning	MOB	Wayne	26 min

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.