Alert archive / Mississippi / Special Weather Statements in 2015

Special Weather Statement, NWS Jackson, MS

August 11, 2015Simpson County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 11, 2015, 6:39 AM CDT for Simpson County, Mississippi. It was in force for 51 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, 2015, 6:39 AM CDT (11:39 UTC)
Expired: Aug 11, 2015, 7:30 AM CDT
In force: 51 min
Issued by: NWS Jackson, MS

County Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 56 km from the middle of the area, began a volume at 11:41 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 00:00Z, 11.7 hours before the alert went out and 61 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: 897 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1953 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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, 4:59 AM CDT, 1 hour 40 minutes earlier.

Area forecast discussion, Aug 11, 4:59 AM CDT, 1 hour 40 minutes before

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Hazardous weather outlook, Aug 11, 5:27 AM CDT, 1 hour 12 minutes before

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In the hours before

Special weather statement, Aug 11, 5:13 AM CDT, 1 hour 26 minutes before

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Special weather statement, Aug 11, 5:59 AM CDT, 40 minutes before

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Local storm report, Aug 11, 6:24 AM CDT, 15 minutes before

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Special weather statement, Aug 11, 6:24 AM CDT, 15 minutes before

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Special weather statement, Aug 11, 6:28 AM CDT, 11 minutes before

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Special weather statement, Aug 11, 6:39 AM 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, 4:06 AM CDT	Special Weather Statement	JAN	Warren	39 min
Aug 11, 4:20 AM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Warren	55 min
Aug 11, 4:42 AM CDT	Special Weather Statement	JAN	Sharkey	33 min
Aug 11, 4:49 AM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Yazoo	29 min
Aug 11, 4:52 AM CDT	Severe Thunderstorm Warning	JAN	Warren	53 min
Aug 11, 5:13 AM CDT	Special Weather Statement	JAN	Hinds	47 min
Aug 11, 5:43 AM CDT	Severe Thunderstorm Warning	JAN	Hinds, Rankin	38 min
Aug 11, 5:59 AM CDT	Special Weather Statement	JAN	Claiborne	46 min
Aug 11, 6:24 AM CDT	Special Weather Statement	JAN	Jefferson	51 min
Aug 11, 6:28 AM CDT	Special Weather Statement	JAN	Simpson	32 min
Aug 11, 7:08 AM CDT	Special Weather Statement	JAN	Newton	37 min
Aug 11, 7:11 AM CDT	Special Weather Statement	JAN	Lawrence	34 min
Aug 11, 7:29 AM CDT	Special Weather Statement	JAN	Warren	31 min
Aug 11, 7:51 AM CDT	Special Weather Statement	JAN	Clarke	24 min
Aug 11, 7:53 AM CDT	Special Weather Statement	JAN	Hinds	37 min
Aug 11, 8:19 AM CDT	Special Weather Statement	JAN	Clarke	26 min
Aug 11, 8:55 AM CDT	Special Weather Statement	JAN	Clarke	35 min
Aug 11, 9:11 AM CDT	Special Weather Statement	JAN	Warren	34 min
Aug 11, 10:00 AM CDT	Special Weather Statement	JAN	Copiah	30 min
Aug 11, 10:03 AM CDT	Special Weather Statement	JAN	Copiah	27 min
Aug 11, 2:20 PM CDT	Special Weather Statement	JAN	Leake	25 min
Aug 11, 3:49 PM CDT	Special Weather Statement	JAN	Clarke	26 min
Aug 11, 3:13 AM CDT	Special Weather Statement	JAN	Morehouse, West Carroll	47 min
Aug 11, 3:36 AM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Morehouse, West Carroll	39 min
Aug 11, 7:19 AM CDT	Special Weather Statement	JAN	Catahoula	26 min
Aug 11, 7:48 AM CDT	Special Weather Statement	JAN	Madison	27 min
Aug 11, 8:03 AM CDT	Special Weather Statement	JAN	Franklin	27 min
Aug 11, 8:27 AM CDT	Special Weather Statement	JAN	Catahoula	33 min
Aug 11, 8:38 AM CDT	Special Weather Statement	JAN	Tensas	37 min
Aug 11, 9:15 AM CDT	Special Weather Statement	JAN	Catahoula	30 min
Aug 11, 9:28 AM CDT	Special Weather Statement	JAN	Tensas	32 min

Nearby

Special Weather Statements in Mississippi, 2015 Every special weather statement in 2015

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.