Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

December 11, 20214 counties in Mississippi

NWS Jackson, MS issued this special weather statement at Dec 11, 2021, 5:56 AM CST for 4 counties in Mississippi. It was in force for 79 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 11, 2021, 5:56 AM CST (11:56 UTC)
Expired: Dec 11, 2021, 7:15 AM CST
In force: 79 min
Issued by: NWS Jackson, MS
Hail: 0.00 in
Wind: 40

Counties Choctaw County, MS, Clay County, MS, Lowndes County, MS, Oktibbeha County, MS

The radar

The Columbus AFB radar (KGWX), 37 km from the middle of the area, began a volume at 12:00 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

Birmingham, AL (KBMX), launched 00:00Z, 11.9 hours before the alert went out and 175 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: 906 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 381 m²/s²
0-3 km storm-relative helicity: 413 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.0

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 11, 2:45 AM CST, 3 hours 11 minutes earlier.

Area forecast discussion, Dec 11, 2:45 AM CST, 3 hours 11 minutes before

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Hazardous weather outlook, Dec 11, 2:55 AM CST, 3 hours 1 minute before

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In the hours before

Special weather statement, Dec 11, 1:59 AM CST, 3 hours 57 minutes before

Special Weather Statement
National Weather Service Jackson MS
159 AM CST Sat Dec 11 2021

ARZ074-LAZ007-110900-
Ashley AR-Morehouse LA-
159 AM CST Sat Dec 11 2021

...Strong thunderstorms will impact portions of Ashley County in
southeastern Arkansas and northwestern Morehouse Parishes through 300
AM CST...

At 158 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Monticello to near Strong. Movement was
east at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Bastrop, Crossett, Hamburg, Wilmot, North Crossett, West Crossett,
Portland, Montrose, Parkdale, Fountain Hill, Berlin, Beekman, Galion,
Jones, Old Milo, Snyder, Mer Rouge and Bonita.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Tornado Watch remains in effect until 500 AM CST for southeastern
Arkansas...and northeastern Louisiana.

&&

LAT...LON 3315 9211 3319 9214 3328 9204 3331 9198
      3335 9199 3338 9196 3339 9199 3339 9146
      3312 9146 3264 9192 3266 9191 3266 9194
      3271 9197 3271 9204 3269 9205 3284 9206
      3287 9208 3301 9207 3309 9214
TIME...MOT...LOC 0758Z 269DEG 41KT 3334 9207 3273 9263

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

DL

Special weather statement, Dec 11, 2:02 AM CST, 3 hours 54 minutes before

Special Weather Statement
National Weather Service Jackson MS
202 AM CST Sat Dec 11 2021

MSZ018-019-110900-
Sunflower MS-Bolivar MS-
202 AM CST Sat Dec 11 2021

...Strong thunderstorms will impact portions of northeastern
Sunflower and Bolivar Counties through 300 AM CST...

At 202 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from Elaine to near Dumas. Movement was east at 55
mph.

HAZARD...Wind gusts up to 50 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.

Locations impacted include...
Cleveland, Ruleville, Shelby, Drew, Rosedale, Parchman, Mound Bayou,
Renova, Boyle, Benoit, Gunnison, Jersey Point, Deeson, Rome,
Merigold, Duncan, Beulah, Pace, Alligator and Winstonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Tornado Watch remains in effect until 500 AM CST for north central
and northwestern Mississippi.

&&

LAT...LON 3412 9066 3399 9066 3399 9045 3363 9045
      3360 9113 3368 9123 3368 9103 3373 9115
      3378 9113 3378 9099 3385 9107 3393 9101
      3397 9109 3396 9097 3402 9099 3409 9087
      3411 9094 3412 9095
TIME...MOT...LOC 0802Z 262DEG 47KT 3432 9084 3370 9143

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

DL

Special weather statement, Dec 11, 2:52 AM CST, 3 hours 4 minutes before

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Special weather statement, Dec 11, 3:27 AM CST, 2 hours 29 minutes before

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Special weather statement, Dec 11, 5:10 AM CST, 46 minutes before

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Special weather statement, Dec 11, 5:56 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 11, 2:02 AM CST	Special Weather Statement	JAN	Bolivar	58 min
Dec 11, 2:52 AM CST	Special Weather Statement	JAN	Washington	38 min
Dec 11, 3:27 AM CST	Special Weather Statement	JAN	Grenada, Humphreys, Leflore, Sunflower, Washington	63 min
Dec 11, 5:10 AM CST	Special Weather Statement	JAN	Choctaw, Montgomery, Webster	50 min
Dec 11, 1:59 AM CST	Special Weather Statement	JAN	Morehouse	61 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.