Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

December 6, 2021Simpson County, Mississippi

NWS Jackson, MS issued this special weather statement at Dec 6, 2021, 11:05 AM CST for Simpson County, Mississippi. It was in force for 40 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 6, 2021, 11:05 AM CST (17:05 UTC)
Expired: Dec 6, 2021, 11:45 AM CST
In force: 40 min
Issued by: NWS Jackson, MS
Hail: 0.75 in
Wind: 50

County Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 53 km from the middle of the area, began a volume at 17:06 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, 5.1 hours before the alert went out and 56 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: 799 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 261 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this special weather statement went out at Dec 6, 10:34 AM CST, 31 minutes earlier.

Area forecast discussion, Dec 6, 10:34 AM CST, 31 minutes before

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Hazardous weather outlook, Dec 6, 10:45 AM CST, 20 minutes before

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In the hours before

Special weather statement, Dec 6, 8:08 AM CST, 2 hours 57 minutes before

Special Weather Statement
National Weather Service Jackson MS
808 AM CST Mon Dec 6 2021

MSZ031-033-039-061445-
Lowndes MS-Oktibbeha MS-Noxubee MS-
808 AM CST Mon Dec 6 2021

...A strong thunderstorm will impact portions of Noxubee,
southeastern Oktibbeha and southern Lowndes Counties through 845 AM
CST...

At 806 AM CST, Doppler radar was tracking a strong thunderstorm near
Crawford, or 12 miles southeast of Starkville, moving southeast at
30 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Crawford around 815 AM CST.
  Brooksville around 825 AM CST.
  Deerbrook around 830 AM CST.
  Prairie Point and Bigbee Valley around 845 AM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Wind gusts near 50 mph and pea sized hail has been reported with
this line of storms. This storm may intensify, so be certain to
monitor local radio stations and available television stations for
additional information and possible warnings from the National
Weather Service.

&&

LAT...LON 3306 8833 3300 8881 3329 8882 3335 8880
      3334 8830
TIME...MOT...LOC 1406Z 314DEG 24KT 3334 8865

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

7

Special weather statement, Dec 6, 9:47 AM CST, 1 hour 18 minutes before

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Local storm report, Dec 6, 10:17 AM CST, 48 minutes before

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Special weather statement, Dec 6, 10:22 AM CST, 43 minutes before

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Local storm report, Dec 6, 10:48 AM CST, 17 minutes before

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Special weather statement, Dec 6, 11:05 AM CST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 6, 4:51 AM CST	Special Weather Statement	JAN	Issaquena	24 min
Dec 6, 5:16 AM CST	Special Weather Statement	JAN	Yazoo	29 min
Dec 6, 5:50 AM CST	Special Weather Statement	JAN	Grenada, Leflore	25 min
Dec 6, 6:19 AM CST	Special Weather Statement	JAN	Grenada, Webster	41 min
Dec 6, 6:50 AM CST	Special Weather Statement	JAN	Clay, Webster	40 min
Dec 6, 6:59 AM CST	Special Weather Statement	JAN	Bolivar	31 min
Dec 6, 7:34 AM CST	Special Weather Statement	JAN	Clay, Lowndes, Oktibbeha	41 min
Dec 6, 7:43 AM CST	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	47 min
Dec 6, 8:08 AM CST	Special Weather Statement	JAN	Noxubee	37 min
Dec 6, 9:38 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Rankin	52 min
Dec 6, 9:47 AM CST	Special Weather Statement	JAN	Madison	28 min
Dec 6, 10:13 AM CST	Severe Thunderstorm Warning	JAN	Rankin	62 min
Dec 6, 10:22 AM CST	Special Weather Statement	JAN	Copiah	38 min
Dec 6, 11:36 AM CST	Special Weather Statement	JAN	Jasper, Smith	39 min
Dec 6, 11:46 AM CST	Severe Thunderstorm Warning	JAN	Clarke, Jasper	59 min
Dec 6, 11:57 AM CST	Special Weather Statement	JAN	Covington, Jones	48 min
Dec 6, 12:21 PM CST	Special Weather Statement	JAN	Clarke	24 min

Nearby

Special Weather Statements in Mississippi, 2021 Every special weather statement 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.