Alert archive / South Dakota / Heat Advisories in 2012

Heat Advisory 4, NWS Aberdeen, SD

July 18, 201218 counties in South Dakota

NWS Aberdeen, SD issued this heat advisory at Jul 18, 2012, 3:39 PM CDT for 18 counties in South Dakota. It took effect at Jul 19, 2012, 1:00 PM CDT. It was in force for 32 hr.

The area

The counties it named.

The facts

Issued: Jul 18, 2012, 3:39 PM CDT (20:39 UTC)
In effect from: Jul 19, 2012, 1:00 PM CDT
Expired: Jul 20, 2012, 9:28 PM CDT
In force: 32 hr
Issued by: NWS Aberdeen, SD

Counties Brown County, SD, Buffalo County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Potter County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 121 km from the middle of the area, began a volume at 20:44 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

Aberdeen, SD (KABR), launched 12:00Z, 8.7 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: 86 J/kg
Mixed-layer CIN: -255 J/kg
Mixed-layer LCL: 894 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -10 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 heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this heat advisory went out at Jul 18, 12:30 PM CDT, 3 hours 9 minutes earlier.

Area forecast discussion, Jul 18, 12:30 PM CDT, 3 hours 9 minutes before

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Hazardous weather outlook, Jul 18, 4:21 AM CDT, 11 hours 18 minutes before

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In the hours before

Local storm report, Jul 18, 2:35 PM CDT, 1 hour 4 minutes before

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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 10:18 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	42 min
Jul 17, 10:49 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	41 min
Jul 17, 11:21 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hughes, Hyde, Lyman	39 min
Jul 18, 1:56 AM CDT	Severe Thunderstorm Warning	ABR	Spink	49 min

Nearby

Heat Advisories in South Dakota, 2012 Every heat advisory 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; radar from the NEXRAD Level II archive.