Alert archive / Mississippi / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 209, NWS Jackson, MS

April 27, 2013Carroll County, Grenada County, Leflore County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 27, 2013, 11:02 PM CDT for Carroll County, Grenada County, Leflore County, Mississippi. It was in force for 43 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: Apr 27, 2013, 11:02 PM CDT (04:02 UTC)
Expired: Apr 27, 2013, 11:45 PM CDT
In force: 43 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Carroll County, MS, Grenada County, MS, Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 146 km from the middle of the area, began a volume at 04:02 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, 4.0 hours before the alert went out and 138 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: 111 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 434 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Apr 27, 7:24 PM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, Apr 27, 7:24 PM CDT, 3 hours 38 minutes before

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Hazardous weather outlook, Apr 27, 6:30 PM CDT, 4 hours 32 minutes before

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In the hours before

Special weather statement, Apr 27, 5:36 PM CDT, 5 hours 26 minutes before

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Special weather statement, Apr 27, 9:04 PM CDT, 1 hour 58 minutes before

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Special weather statement, Apr 27, 10:26 PM CDT, 36 minutes before

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Special weather statement, Apr 27, 10:57 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
Apr 27, 9:04 PM CDT	Special Weather Statement	JAN	Bolivar	46 min
Apr 27, 9:10 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	50 min
Apr 27, 10:26 PM CDT	Special Weather Statement	JAN	Sunflower	29 min
Apr 27, 10:57 PM CDT	Special Weather Statement	JAN	Leflore	33 min
Apr 28, 6:43 AM CDT	Special Weather Statement	JAN	Rankin	42 min
Apr 28, 7:54 AM CDT	Special Weather Statement	JAN	Leake	31 min
Apr 28, 8:35 AM CDT	Special Weather Statement	JAN	Lamar	30 min
Apr 28, 8:50 AM CDT	Flash Flood Warning	JAN	Forrest, Lamar, Marion	115 min
Apr 28, 8:51 AM CDT	Special Weather Statement	JAN	Smith	29 min
Apr 28, 9:50 AM CDT	Special Weather Statement	JAN	Clay	30 min
Apr 28, 10:39 AM CDT	Special Weather Statement	JAN	Clay	41 min
Apr 28, 10:44 AM CDT	Flash Flood Warning	JAN	Forrest, Lamar, Marion	2 hr
Apr 28, 11:25 AM CDT	Special Weather Statement	JAN	Forrest, Lamar	40 min
Apr 28, 11:42 AM CDT	Special Weather Statement	JAN	Scott	38 min
Apr 28, 12:02 PM CDT	Special Weather Statement	JAN	Scott	28 min
Apr 28, 12:24 PM CDT	Special Weather Statement	JAN	Simpson	41 min
Apr 28, 12:52 PM CDT	Special Weather Statement	JAN	Scott, Smith	43 min
Apr 28, 1:10 PM CDT	Special Weather Statement	JAN	Newton, Smith	45 min
Apr 28, 1:23 PM CDT	Special Weather Statement	JAN	Neshoba	47 min

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.