Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

August 11, 2021Clarke County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 11, 2021, 2:16 PM CDT for Clarke County, Mississippi. It was in force for 29 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, 2:16 PM CDT (19:16 UTC)
Expired: Aug 11, 2021, 2:45 PM CDT
In force: 29 min
Issued by: NWS Jackson, MS
Hail: 0.00 in
Wind: 40

County Clarke County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 135 km from the middle of the area, began a volume at 19:17 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, 7.3 hours before the alert went out and 145 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: 1448 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1031 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 11, 1:07 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Aug 11, 1:07 PM CDT, 1 hour 9 minutes before

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Hazardous weather outlook, Aug 11, 5:00 AM CDT, 9 hours 16 minutes before

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In the hours before

Special weather statement, Aug 11, 2:16 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Jackson MS
216 PM CDT Wed Aug 11 2021

MSZ058-111945-
Clarke MS-
216 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of eastern Clarke
County through 245 PM CDT...

At 215 PM CDT, Doppler radar was tracking a strong thunderstorm near
Sykes, or 7 miles east of Quitman, moving west at 5 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Middleton, Sykes and De Soto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3214 8845 3189 8859 3194 8874 3220 8862
TIME...MOT...LOC 1915Z 107DEG 5KT 3203 8859

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

TW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:01 PM CDT	Special Weather Statement	JAN	Jones	29 min
Aug 11, 3:24 PM CDT	Special Weather Statement	JAN	Jones	51 min
Aug 11, 3:32 PM CDT	Special Weather Statement	JAN	Jasper	43 min
Aug 11, 3:53 PM CDT	Special Weather Statement	JAN	Lowndes	67 min
Aug 11, 4:05 PM CDT	Severe Thunderstorm Warning	JAN	Jasper	37 min
Aug 11, 4:32 PM CDT	Special Weather Statement	JAN	Smith	28 min
Aug 11, 4:36 PM CDT	Special Weather Statement	JAN	Simpson	24 min
Aug 11, 4:46 PM CDT	Special Weather Statement	JAN	Simpson	29 min
Aug 11, 4:46 PM CDT	Special Weather Statement	JAN	Smith	29 min
Aug 11, 4:47 PM CDT	Special Weather Statement	JAN	Kemper	28 min
Aug 11, 5:18 PM CDT	Special Weather Statement	JAN	Rankin	42 min
Aug 11, 5:22 PM CDT	Special Weather Statement	JAN	Oktibbeha	38 min
Aug 11, 5:49 PM CDT	Special Weather Statement	JAN	Noxubee	26 min
Aug 11, 5:50 PM CDT	Special Weather Statement	JAN	Noxubee	25 min
Aug 11, 6:49 PM CDT	Special Weather Statement	JAN	Choctaw	26 min
Aug 11, 6:59 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw	46 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.