Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Mobile, AL

March 17, 20214 counties in Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Mar 17, 2021, 8:54 PM CDT for 4 counties in Mississippi. 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 17, 2021, 8:54 PM CDT (01:54 UTC)
Expired: Mar 17, 2021, 9:22 PM CDT
In force: 28 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 106 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.

979 
WUUS54 KMOB 180154
SVRMOB
MSC039-041-111-131-180245-
/O.NEW.KMOB.SV.W.0022.210318T0154Z-210318T0245Z/

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

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northwestern George County in southeastern Mississippi...
  Southern Perry County in southeastern Mississippi...
  Greene County in southeastern Mississippi...
  Eastern Stone County in southeastern Mississippi...

* Until 945 PM CDT.

* At 853 PM CDT, a severe thunderstorm was located 8 miles east of
  Wiggins, moving northeast at 55 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Wiggins, Lucedale, Leakesville, Perkinston and McLain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 AM 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 this storm. 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 3091 8914 3101 8915 3141 8845 3100 8843
      3074 8892 3070 8913 3091 8920
TIME...MOT...LOC 0153Z 232DEG 49KT 3089 8900 

HAIL...0.75IN
WIND...70MPH
 
$$

21/CL

2 follow-up statements

682 
WWUS54 KMOB 180205
SVSMOB

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

MSC039-041-111-131-180245-
/O.CON.KMOB.SV.W.0022.000000T0000Z-210318T0245Z/
George MS-Perry MS-Greene MS-Stone MS-
905 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR NORTHWESTERN GEORGE...SOUTHERN PERRY...GREENE AND EASTERN STONE
COUNTIES...

At 904 PM CDT, a severe thunderstorm was located 11 miles south of
McLain, or 13 miles west of Lucedale, moving northeast at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lucedale, Leakesville and McLain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Continuous cloud to ground lightning is occurring with this storm.
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 3101 8915 3141 8845 3100 8843 3074 8892
      3070 8911
TIME...MOT...LOC 0204Z 242DEG 48KT 3094 8882 

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

21/CL

872 
WWUS54 KMOB 180222
SVSMOB

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

MSC039-041-111-131-180231-
/O.CAN.KMOB.SV.W.0022.000000T0000Z-210318T0245Z/
George MS-Perry MS-Greene MS-Stone MS-
922 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GEORGE...SOUTHERN
PERRY...GREENE AND EASTERN STONE COUNTIES 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.  However gusty winds are
still possible with this thunderstorm.

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

LAT...LON 3101 8915 3141 8845 3100 8843 3074 8892
      3070 8911
TIME...MOT...LOC 0219Z 232DEG 49KT 3108 8861 

$$

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	Greene, Perry, Wayne	65 min
Mar 17, 7:43 PM CDT	Areal Flood Advisory	MOB	George, Greene, Perry, Stone, Wayne	6 hr
Mar 17, 8:07 PM CDT	Special Weather Statement	MOB	Greene, Perry, Stone	53 min
Mar 17, 8:22 PM CDT	Severe Thunderstorm Warning	MOB	Perry, Stone	38 min
Mar 17, 9:17 PM CDT	Areal Flood Advisory	MOB	Perry, Stone	3 hr
Mar 17, 9:27 PM CDT	Special Weather Statement	MOB	George, Greene, Stone	48 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.