Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

August 12, 2021Lowndes County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 12, 2021, 5:58 PM CDT for Lowndes County, Mississippi. It was in force for 32 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 12, 2021, 5:58 PM CDT (22:58 UTC)
Expired: Aug 12, 2021, 6:30 PM CDT
In force: 32 min
Issued by: NWS Jackson, MS
Hail: 0.25 in
Wind: 40

County Lowndes County, MS

The radar

The Columbus AFB radar (KGWX), 27 km from the middle of the area, began a volume at 22:57 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 12:00Z, 11.0 hours before the alert went out and 162 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: 151 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -8 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 12, 3:08 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Aug 12, 3:08 PM CDT, 2 hours 50 minutes before

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Hazardous weather outlook, Aug 12, 2:28 PM CDT, 3 hours 30 minutes before

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In the hours before

Special weather statement, Aug 12, 12:37 PM CDT, 5 hours 21 minutes before

Special Weather Statement
National Weather Service Jackson MS
1237 PM CDT Thu Aug 12 2021

MSZ073-074-121800-
Lamar MS-Forrest MS-
1237 PM CDT Thu Aug 12 2021

...Strong thunderstorms will impact portions of southeastern Forrest
and southern Lamar Counties through 100 PM CDT...

At 1236 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Baxterville to near Mclaurin. Movement was
northwest at 10 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...
Purvis, Lumberton, Mclaurin, Brooklyn and Rock Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3100 8948 3100 8950 3101 8950 3101 8955
      3100 8955 3100 8965 3111 8954 3125 8915
      3103 8915 3100 8934 3101 8935 3101 8942
      3098 8943 3098 8947
TIME...MOT...LOC 1736Z 150DEG 8KT 3104 8954 3121 8915

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

DC

Special weather statement, Aug 12, 1:07 PM CDT, 4 hours 51 minutes before

Special Weather Statement
National Weather Service Jackson MS
107 PM CDT Thu Aug 12 2021

MSZ073-074-121830-
Lamar MS-Forrest MS-
107 PM CDT Thu Aug 12 2021

...Strong thunderstorms will impact portions of northern Forrest and
Lamar Counties through 130 PM CDT...

At 107 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Sunrise to near West Hattiesburg to near
Baxterville. Movement was northwest at 15 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...
Hattiesburg, Petal, West Hattiesburg, Sumrall, Rawls Springs, Sunrise
and Macedonia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3143 8965 3143 8914 3123 8915 3124 8938
      3109 8949 3109 8966
TIME...MOT...LOC 1807Z 141DEG 15KT 3129 8920 3130 8943 3117 8958

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

DC

Special weather statement, Aug 12, 5:58 PM CDT, 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
Aug 11, 7:11 PM CDT	Special Weather Statement	JAN	Holmes	34 min
Aug 11, 7:18 PM CDT	Special Weather Statement	JAN	Madison	12 min
Aug 11, 8:27 PM CDT	Special Weather Statement	JAN	Carroll	33 min
Aug 12, 12:37 PM CDT	Special Weather Statement	JAN	Forrest	23 min
Aug 12, 1:07 PM CDT	Special Weather Statement	JAN	Lamar	23 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.