Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 293, NWS Jackson, MS

December 29, 2021Grenada County, Montgomery County, Webster County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Dec 29, 2021, 4:25 PM CST for Grenada County, Montgomery County, Webster County, Mississippi. It was in force for 50 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: Dec 29, 2021, 4:25 PM CST (22:25 UTC)
Expired: Dec 29, 2021, 5:15 PM CST
In force: 50 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Grenada County, MS, Montgomery County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 97 km from the middle of the area, began a volume at 22:27 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
Dec 29, 12:05 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 10.4 hours before the alert went out and 146 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: 1900 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

660 
WUUS54 KJAN 292225
SVRJAN
MSC043-097-155-292315-
/O.NEW.KJAN.SV.W.0293.211229T2225Z-211229T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
425 PM CST Wed Dec 29 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Grenada County in north central Mississippi...
  Webster County in north central Mississippi...
  Northwestern Montgomery County in north central Mississippi...

* Until 515 PM CST.

* At 425 PM CST, a severe thunderstorm was located near Duck Hill, or
  near Winona, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Sweatman around 435 PM CST.
  Lodi around 440 PM CST.
  Embry around 455 PM CST.
  Eupora and Bellefontaine around 500 PM CST.
  Clarkson around 510 PM CST.
  Cumberland around 515 PM CST.

Other locations impacted by this severe thunderstorm include
Walthall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM CST for north central
and northeastern Mississippi.

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

A Tornado Watch remains in effect until 700 PM CST for north central
and northeastern Mississippi.

&&

LAT...LON 3356 8903 3356 8909 3355 8909 3346 8975
      3358 8979 3366 8978 3372 8951 3372 8919
      3374 8919 3374 8908
TIME...MOT...LOC 2225Z 255DEG 34KT 3356 8968 

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

$$

JNE

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 28, 6:29 PM CST	Special Weather Statement	JAN	Warren	31 min
Dec 28, 7:02 PM CST	Special Weather Statement	JAN	Choctaw	28 min
Dec 28, 7:17 PM CST	Special Weather Statement	JAN	Lowndes	28 min
Dec 28, 8:18 PM CST	Special Weather Statement	JAN	Clay	27 min
Dec 28, 8:26 PM CST	Special Weather Statement	JAN	Lincoln	34 min
Dec 28, 9:53 PM CST	Special Weather Statement	JAN	Lowndes	37 min
Dec 28, 10:27 PM CST	Flash Flood Warning	JAN	Clay	3 hr
Dec 28, 10:35 PM CST	Special Weather Statement	JAN	Lowndes	25 min
Dec 29, 12:13 AM CST	Special Weather Statement	JAN	Noxubee	32 min
Dec 29, 2:40 PM CST	Special Weather Statement	JAN	Warren	50 min
Dec 29, 3:39 PM CST	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	48 min
Dec 29, 3:59 PM CST	Special Weather Statement	JAN	Forrest	46 min
Dec 29, 4:36 PM CST	Special Weather Statement	JAN	Carroll	24 min
Dec 29, 4:55 PM CST	Tornado Warning	JAN	Clay, Webster	42 min
Dec 29, 5:45 PM CST	Special Weather Statement	JAN	Neshoba	45 min
Dec 29, 5:50 PM CST	Severe Thunderstorm Warning	JAN	Clay, Lowndes	40 min
Dec 29, 5:52 PM CST	Special Weather Statement	JAN	Winston	38 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.