Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 252, NWS Jackson, MS

August 19, 2021Oktibbeha County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 19, 2021, 3:25 PM CDT for Oktibbeha County, Mississippi. It was in force for 35 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 19, 2021, 3:25 PM CDT (20:25 UTC)
Expired: Aug 19, 2021, 4:00 PM CDT
In force: 35 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Oktibbeha County, MS

The radar

The Columbus AFB radar (KGWX), 59 km from the middle of the area, began a volume at 20:24 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

Jackson, MS (KJAN), launched 12:00Z, 8.4 hours before the alert went out and 181 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: 1733 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

212 
WUUS54 KJAN 192025
SVRJAN
MSC105-192100-
/O.NEW.KJAN.SV.W.0252.210819T2025Z-210819T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
325 PM CDT Thu Aug 19 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Northeastern Oktibbeha County in northeastern Mississippi...

* Until 400 PM CDT.

* At 324 PM CDT, a severe thunderstorm was located near Muldrow, or
  near Starkville, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Muldrow around 335 PM CDT.
  Sessums around 340 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3345 8890 3356 8886 3357 8873 3356 8870
      3357 8869 3356 8867 3339 8867
TIME...MOT...LOC 2024Z 278DEG 21KT 3353 8880 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NF

1 follow-up statement

770 
WWUS54 KJAN 192052
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
352 PM CDT Thu Aug 19 2021

MSC105-192102-
/O.EXP.KJAN.SV.W.0252.000000T0000Z-210819T2100Z/
Oktibbeha MS-
352 PM CDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OKTIBBEHA COUNTY
WILL EXPIRE AT 400 PM CDT...
                
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 will be allowed to expire.  However heavy rain
is still possible with thunderstorms in this area.

LAT...LON 3345 8890 3356 8886 3357 8873 3356 8870
      3357 8869 3356 8867 3339 8867
TIME...MOT...LOC 2052Z 278DEG 21KT 3351 8864 

$$

NF

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 7:25 PM CDT	Special Weather Statement	JAN	Simpson	50 min
Aug 18, 7:51 PM CDT	Special Weather Statement	JAN	Issaquena	39 min
Aug 18, 8:22 PM CDT	Special Weather Statement	JAN	Rankin	38 min
Aug 18, 8:25 PM CDT	Special Weather Statement	JAN	Issaquena	50 min
Aug 18, 8:42 PM CDT	Special Weather Statement	JAN	Rankin	33 min
Aug 18, 8:44 PM CDT	Special Weather Statement	JAN	Washington	46 min
Aug 18, 9:20 PM CDT	Special Weather Statement	JAN	Washington	40 min
Aug 18, 9:47 PM CDT	Special Weather Statement	JAN	Bolivar	43 min
Aug 19, 1:42 PM CDT	Special Weather Statement	JAN	Winston	33 min
Aug 19, 2:18 PM CDT	Special Weather Statement	JAN	Noxubee	27 min
Aug 19, 3:16 PM CDT	Flash Flood Warning	JAN	Lowndes	3 hr
Aug 19, 3:50 PM CDT	Flash Flood Warning	JAN	Clay, Oktibbeha	80 min
Aug 19, 6:15 PM CDT	Special Weather Statement	JAN	Scott	30 min
Aug 19, 6:38 PM CDT	Special Weather Statement	JAN	Bolivar, Carroll, Holmes, Leflore, Sunflower	52 min
Aug 19, 6:43 PM CDT	Special Weather Statement	JAN	Jones	62 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.