Alert archive / Mississippi / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 188, NWS Jackson, MS

May 9, 2007Leflore County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 9, 2007, 3:55 PM CDT for Leflore County, Mississippi. It was in force for 50 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 9, 2007, 3:55 PM CDT (20:55 UTC)
Expired: May 9, 2007, 4:45 PM CDT
In force: 50 min
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

County Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 144 km from the middle of the area, began a volume at 20:57 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

Little Rock, AR (KLZK), launched 12:00Z, 8.9 hours before the alert went out and 146 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: 726 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -6 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

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 9, 3:50 PM CDT, 5 minutes earlier.

Area forecast discussion, May 9, 3:50 PM CDT, 5 minutes before

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Hazardous weather outlook, May 9, 2:55 PM CDT, 1 hour before

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In the hours before

Local storm report, May 9, 1:21 PM CDT, 2 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
121 PM CDT WED MAY 09 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1217 PM     HAIL             GREENVILLE              33.39N 91.05W
05/09/2007  E0.25 INCH       WASHINGTON         MS   LAW ENFORCEMENT

            PEA SIZE HAIL NEAR GREENVILLE REPORTED BY WASHINGTON
            COUNTY SO

&&

EC

Local storm report, May 9, 3:50 PM CDT, 5 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 9, 1:55 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	35 min
May 9, 1:59 PM CDT	Severe Thunderstorm Warning	JAN	Ashley	31 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2007 Every severe thunderstorm warning in 2007

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.