Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 119, NWS Huntsville, AL

July 3, 2017Cullman County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Jul 3, 2017, 7:42 PM CDT for Cullman County, Alabama. It was in force for 33 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 3, 2017, 7:42 PM CDT (00:42 UTC)
Expired: Jul 3, 2017, 8:15 PM CDT
In force: 33 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cullman County, AL

The radar

The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 00:41 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

Birmingham, AL (KBMX), launched 00:00Z, 0.7 hours before the alert went out and 106 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: 965 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1351 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 31 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 Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 6:50 PM CDT, 52 minutes earlier.

Area forecast discussion, Jul 3, 6:50 PM CDT, 52 minutes before

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Hazardous weather outlook, Jul 3, 3:54 PM CDT, 3 hours 48 minutes before

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In the hours before

Local storm report, Jul 3, 6:01 PM CDT, 1 hour 41 minutes before

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Special weather statement, Jul 3, 6:01 PM CDT, 1 hour 41 minutes before

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Local storm report, Jul 3, 6:03 PM CDT, 1 hour 39 minutes before

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Local storm report, Jul 3, 6:09 PM CDT, 1 hour 33 minutes before

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Local storm report, Jul 3, 6:11 PM CDT, 1 hour 31 minutes before

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Local storm report, Jul 3, 7:38 PM CDT, 4 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
Jul 3, 8:03 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	27 min
Jul 3, 8:30 PM CDT	Special Weather Statement	HUN	Cullman	30 min
Jul 3, 8:42 PM CDT	Special Weather Statement	HUN	Colbert	33 min
Jul 3, 11:38 PM CDT	Special Weather Statement	HUN	Cullman	37 min
Jul 4, 12:03 AM CDT	Special Weather Statement	HUN	Marshall	42 min
Jul 4, 2:17 AM CDT	Special Weather Statement	HUN	Madison	28 min
Jul 4, 3:41 AM CDT	Special Weather Statement	HUN	Jackson	64 min
Jul 4, 4:21 AM CDT	Special Weather Statement	HUN	Jackson, Madison	54 min
Jul 4, 4:33 AM CDT	Flash Flood Warning	HUN	Madison	3 hr
Jul 4, 4:51 AM CDT	Special Weather Statement	HUN	Colbert, Limestone	54 min
Jul 4, 5:08 AM CDT	Flash Flood Warning	HUN	DeKalb, Jackson, Madison	4 hr
Jul 4, 5:48 AM CDT	Special Weather Statement	HUN	Limestone	57 min
Jul 4, 2:28 PM CDT	Special Weather Statement	HUN	Cullman	32 min
Jul 4, 5:12 PM CDT	Special Weather Statement	HUN	Lawrence	33 min
Jul 4, 5:39 PM CDT	Special Weather Statement	HUN	Limestone	36 min
Jul 4, 5:24 AM CDT	Special Weather Statement	HUN	Franklin, Lincoln	81 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017 Every severe thunderstorm warning in 2017

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.