Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Huntsville, AL

July 20, 2012Morgan County, Alabama

NWS Huntsville, AL issued this special weather statement at Jul 20, 2012, 5:15 AM CDT for Morgan County, Alabama. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2012, 5:15 AM CDT (10:15 UTC)
Expired: Jul 20, 2012, 6:00 AM CDT
In force: 45 min
Issued by: NWS Huntsville, AL

County Morgan County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 10.3 hours before the alert went out and 179 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: 2853 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1475 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 20, 4:51 AM CDT, 24 minutes earlier.

Area forecast discussion, Jul 20, 4:51 AM CDT, 24 minutes before

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Hazardous weather outlook, Jul 20, 5:08 AM CDT, 7 minutes before

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In the hours before

Special weather statement, Jul 20, 3:20 AM CDT, 1 hour 55 minutes before

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Special weather statement, Jul 20, 3:54 AM CDT, 1 hour 21 minutes before

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Special weather statement, Jul 20, 4:09 AM CDT, 1 hour 6 minutes before

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Special weather statement, Jul 20, 4:22 AM CDT, 53 minutes before

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Special weather statement, Jul 20, 4:51 AM CDT, 24 minutes before

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Special weather statement, Jul 20, 5:15 AM CDT, 0 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 19, 7:13 PM CDT	Severe Thunderstorm Warning	HUN	Colbert	47 min
Jul 19, 7:23 PM CDT	Flash Flood Warning	HUN	Colbert	75 min
Jul 20, 3:54 AM CDT	Special Weather Statement	HUN	Jackson	51 min
Jul 20, 4:09 AM CDT	Special Weather Statement	HUN	Limestone	51 min
Jul 20, 4:22 AM CDT	Special Weather Statement	HUN	Jackson	38 min
Jul 20, 4:51 AM CDT	Special Weather Statement	HUN	DeKalb	39 min
Jul 20, 1:51 AM CDT	Special Weather Statement	HUN	Moore	39 min
Jul 20, 2:29 AM CDT	Special Weather Statement	HUN	Moore	46 min
Jul 20, 2:56 AM CDT	Special Weather Statement	HUN	Franklin	49 min
Jul 20, 3:20 AM CDT	Special Weather Statement	HUN	Franklin	40 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.