Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Jackson, MS

July 23, 2017Leflore County, Mississippi

NWS Jackson, MS issued this special weather statement at Jul 23, 2017, 4:58 PM CDT for Leflore 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: Jul 23, 2017, 4:58 PM CDT (21:58 UTC)
Expired: Jul 23, 2017, 5:30 PM CDT
In force: 32 min
Issued by: NWS Jackson, MS

County Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 132 km from the middle of the area, began a volume at 21:58 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

Little Rock, AR (KBYH), launched 12:00Z, 10.0 hours before the alert went out and 165 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: 1403 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1121 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -23 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 Jul 23, 3:48 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 23, 3:48 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jul 23, 3:20 PM CDT, 1 hour 38 minutes before

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In the hours before

Special weather statement, Jul 23, 3:26 PM CDT, 1 hour 32 minutes before

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Special weather statement, Jul 23, 3:32 PM CDT, 1 hour 26 minutes before

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Special weather statement, Jul 23, 3:50 PM CDT, 1 hour 8 minutes before

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Special weather statement, Jul 23, 4:12 PM CDT, 46 minutes before

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Special weather statement, Jul 23, 4:48 PM CDT, 10 minutes before

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Special weather statement, Jul 23, 4:58 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
Jul 23, 3:15 AM CDT	Heat Advisory	JAN	Bolivar, Grenada, Leflore, Sunflower, Washington	16 hr
Jul 23, 3:50 PM CDT	Special Weather Statement	JAN	Washington	25 min
Jul 23, 5:42 PM CDT	Special Weather Statement	JAN	Leflore	33 min
Jul 23, 3:14 PM CDT	Special Weather Statement	JAN	Tensas	31 min
Jul 23, 3:26 PM CDT	Special Weather Statement	JAN	Madison	34 min
Jul 23, 3:32 PM CDT	Special Weather Statement	JAN	Franklin	28 min
Jul 23, 4:12 PM CDT	Special Weather Statement	JAN	Morehouse	33 min
Jul 23, 4:48 PM CDT	Special Weather Statement	JAN	Richland	27 min
Jul 22, 7:08 PM CDT	Special Weather Statement	JAN	Chicot	37 min

Nearby

Special Weather Statements in Mississippi, 2017 Every special weather statement in 2017

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.