Alert archive / Mississippi / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 434, NWS Jackson, MS

July 15, 2009Adams County, Jefferson County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 15, 2009, 6:52 PM CDT for Adams County, Jefferson County, Mississippi. It was in force for 38 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: Jul 15, 2009, 6:52 PM CDT (23:52 UTC)
Expired: Jul 15, 2009, 7:30 PM CDT
In force: 38 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Adams County, MS, Jefferson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 136 km from the middle of the area, began a volume at 23:53 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.9 hours before the alert went out and 208 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: 2053 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: -64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 15, 4:00 PM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, Jul 15, 4:00 PM CDT, 2 hours 52 minutes before

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Hazardous weather outlook, Jul 15, 3:06 PM CDT, 3 hours 46 minutes before

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In the hours before

Special weather statement, Jul 15, 4:25 PM CDT, 2 hours 27 minutes before

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Special weather statement, Jul 15, 5:29 PM CDT, 1 hour 23 minutes before

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Special weather statement, Jul 15, 5:44 PM CDT, 1 hour 8 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 15, 3:35 AM CDT	Heat Advisory	JAN	Attala, Bolivar, Carroll, Choctaw, Grenada, Hinds and 15 more	15 hr
Jul 15, 5:33 PM CDT	Severe Thunderstorm Warning	JAN	Franklin	27 min
Jul 15, 5:55 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Jefferson, Lincoln	25 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2009 Every severe thunderstorm warning in 2009

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.