Alert archive / Nebraska / Heat Advisories in 2012

Heat Advisory 8, NWS North Platte, NE

July 18, 2012Boyd County, Holt County, Wheeler County, Nebraska

NWS North Platte, NE issued this heat advisory at Jul 18, 2012, 4:03 AM CDT for Boyd County, Holt County, Wheeler County, Nebraska. It took effect at Jul 18, 2012, 1:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 18, 2012, 4:03 AM CDT (09:03 UTC)
In effect from: Jul 18, 2012, 1:00 PM CDT
Expired: Jul 18, 2012, 8:00 PM CDT
In force: 7 hr
Issued by: NWS North Platte, NE

Counties Boyd County, NE, Holt County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 09:07 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 00:00Z, 9.1 hours before the alert went out and 276 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: 96 J/kg
Mixed-layer CIN: -344 J/kg
Mixed-layer LCL: 1258 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 228 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 North Platte, NE wrote its last area forecast discussion before this heat advisory went out at Jul 18, 2:57 AM CDT, 1 hour 6 minutes earlier.

Area forecast discussion, Jul 18, 2:57 AM CDT, 1 hour 6 minutes before

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Hazardous weather outlook, Jul 17, 4:13 PM CDT, 11 hours 50 minutes before

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 2:53 PM CDT	Tornado Warning	LBF	Deuel	22 min
Jul 18, 3:01 PM CDT	Heat Advisory	LBF	Blaine, Boyd, Brown, Chase, Cherry, Custer and 15 more	6 days
Jul 18, 3:01 PM CDT	Heat Advisory	LBF	Blaine, Boyd, Brown, Cherry, Custer, Frontier and 12 more	13 hr

Nearby

Heat Advisories in Nebraska, 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.