Alert archive / Mississippi / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 212, NWS Jackson, MS

May 17, 2013Choctaw County, Montgomery County, Webster County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 17, 2013, 11:54 PM CDT for Choctaw County, Montgomery County, Webster 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 counties it named.

The facts

Issued: May 17, 2013, 11:54 PM CDT (04:54 UTC)
Expired: May 18, 2013, 12:45 AM CDT
In force: 51 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Choctaw County, MS, Montgomery County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 108 km from the middle of the area, began a volume at 04:56 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 (KLZK), launched 00:00Z, 4.9 hours before the alert went out and 158 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: 1699 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 17, 3:16 PM CDT, 8 hours 38 minutes earlier.

Area forecast discussion, May 17, 3:16 PM CDT, 8 hours 38 minutes before

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Hazardous weather outlook, May 17, 3:02 PM CDT, 8 hours 52 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
May 17, 11:19 PM CDT	Special Weather Statement	JAN	Attala	31 min
May 17, 11:28 PM CDT	Special Weather Statement	JAN	Montgomery	32 min
May 17, 11:51 PM CDT	Special Weather Statement	JAN	Attala	29 min
May 18, 1:03 AM CDT	Special Weather Statement	JAN	Lowndes	27 min
May 18, 1:04 AM CDT	Special Weather Statement	JAN	Oktibbeha	31 min
May 18, 1:20 AM CDT	Special Weather Statement	JAN	Choctaw	30 min
May 18, 1:35 AM CDT	Special Weather Statement	JAN	Webster	30 min
May 18, 1:45 AM CDT	Special Weather Statement	JAN	Clay	20 min
May 18, 2:25 AM CDT	Special Weather Statement	JAN	Webster	30 min
May 18, 3:08 AM CDT	Severe Thunderstorm Warning	JAN	Clay, Webster	52 min
May 18, 3:49 AM CDT	Severe Thunderstorm Warning	JAN	Clay	41 min
May 18, 4:28 AM CDT	Severe Thunderstorm Warning	JAN	Clay	47 min
May 18, 8:16 AM CDT	River Flood Warning	JAN	Carroll, Leflore	12 hr
May 18, 11:23 AM CDT	River Flood Warning	JAN	Clay	69 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2013 Every severe thunderstorm warning in 2013

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.