Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 65, NWS Huntsville, AL

May 31, 2015Jackson County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 31, 2015, 11:44 PM CDT for Jackson County, Alabama. It was in force for 31 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 31, 2015, 11:44 PM CDT (04:44 UTC)
Expired: Jun 1, 2015, 12:15 AM CDT
In force: 31 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 19 km from the middle of the area, began a volume at 04:47 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

Nashville Metro, TN (KBNA), launched 00:00Z, 4.7 hours before the alert went out and 160 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: 417 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.4

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 Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 9:38 PM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, May 31, 9:38 PM CDT, 2 hours 6 minutes before

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Hazardous weather outlook, May 31, 10:50 PM CDT, 54 minutes before

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In the hours before

Special weather statement, May 31, 8:13 PM CDT, 3 hours 31 minutes before

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Special weather statement, May 31, 8:56 PM CDT, 2 hours 48 minutes before

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Special weather statement, May 31, 9:58 PM CDT, 1 hour 46 minutes before

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Special weather statement, May 31, 10:57 PM CDT, 47 minutes before

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Local storm report, May 31, 11:26 PM CDT, 18 minutes before

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Local storm report, May 31, 11:39 PM CDT, 5 minutes before

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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 7:29 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	46 min
May 31, 7:50 PM CDT	Special Weather Statement	HUN	Lawrence	25 min
May 31, 8:13 PM CDT	Special Weather Statement	HUN	Limestone	47 min
May 31, 8:56 PM CDT	Special Weather Statement	HUN	Cullman, Morgan	49 min
May 31, 9:58 PM CDT	Special Weather Statement	HUN	Morgan	47 min
May 31, 10:57 PM CDT	Special Weather Statement	HUN	Marshall	33 min
May 31, 11:15 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	30 min
Jun 1, 12:07 AM CDT	Special Weather Statement	HUN	Jackson	23 min
Jun 1, 3:04 PM CDT	Special Weather Statement	HUN	Limestone	26 min
Jun 1, 3:43 PM CDT	Special Weather Statement	HUN	Madison	47 min
Jun 1, 4:42 PM CDT	Special Weather Statement	HUN	Madison	48 min
Jun 1, 5:02 PM CDT	Special Weather Statement	HUN	Morgan	28 min
Jun 1, 5:28 PM CDT	Special Weather Statement	HUN	Madison	32 min
Jun 1, 5:57 PM CDT	Special Weather Statement	HUN	Madison	33 min
Jun 1, 3:42 PM CDT	Special Weather Statement	HUN	Lincoln	33 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015 Every severe thunderstorm warning 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.