Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 185, NWS Mobile, AL

August 11, 2021Greene County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Aug 11, 2021, 4:09 PM CDT for Greene County, Mississippi. It was in force for 32 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: Aug 11, 2021, 4:09 PM CDT (21:09 UTC)
Expired: Aug 11, 2021, 4:41 PM CDT
In force: 32 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Greene County, MS

The radar

The Mobile radar (KMOB), 81 km from the middle of the area, began a volume at 21:09 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.2 hours before the alert went out and 167 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: 3290 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

250 
WUUS54 KMOB 112109
SVRMOB
MSC041-112200-
/O.NEW.KMOB.SV.W.0185.210811T2109Z-210811T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
409 PM CDT Wed Aug 11 2021

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northeastern Greene County in southeastern Mississippi...

* Until 500 PM CDT.

* At 409 PM CDT, a severe thunderstorm was located 4 miles west of
  Fruitdale, or 12 miles north of Leakesville, moving northwest at 10
  mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Greene County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and 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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3143 8858 3144 8849 3141 8845 3129 8844
      3125 8845 3131 8868
TIME...MOT...LOC 2109Z 137DEG 7KT 3133 8849 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CGAL

1 follow-up statement

980 
WWUS54 KMOB 112141
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
441 PM CDT Wed Aug 11 2021

MSC041-112151-
/O.CAN.KMOB.SV.W.0185.000000T0000Z-210811T2200Z/
Greene MS-
441 PM CDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GREENE 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 3143 8858 3144 8849 3141 8845 3129 8844
      3125 8845 3131 8868
TIME...MOT...LOC 2136Z 137DEG 7KT 3138 8854 

$$

CGAL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:01 PM CDT	Special Weather Statement	MOB	Wayne	44 min
Aug 11, 3:15 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	23 min
Aug 11, 3:33 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	22 min
Aug 11, 3:48 PM CDT	Special Weather Statement	MOB	Greene	42 min
Aug 11, 4:04 PM CDT	Special Weather Statement	MOB	Greene	41 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.