Alert archive / Kansas / Heat Advisories in 2012

Heat Advisory 6, NWS Topeka, KS

July 17, 201223 counties in Kansas

NWS Topeka, KS issued this heat advisory at Jul 17, 2012, 3:30 PM CDT for 23 counties in Kansas. It took effect at Jul 18, 2012, 12:00 PM CDT. It was in force for 64 hr.

The area

The counties it named.

The facts

Issued: Jul 17, 2012, 3:30 PM CDT (20:30 UTC)
In effect from: Jul 18, 2012, 12:00 PM CDT
Expired: Jul 21, 2012, 3:48 AM CDT
In force: 64 hr
Issued by: NWS Topeka, KS

All 23 counties

Anderson County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 16 km from the middle of the area, began a volume at 20:29 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

Topeka, KS (KTOP), launched 12:00Z, 8.5 hours before the alert went out and 61 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: 180 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 1543 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Topeka, KS wrote its last area forecast discussion before this heat advisory went out at Jul 17, 3:19 PM CDT, 11 minutes earlier.

Area forecast discussion, Jul 17, 3:19 PM CDT, 11 minutes before

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Hazardous weather outlook, Jul 17, 4:32 AM CDT, 10 hours 58 minutes before

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Nearby

Heat Advisories in Kansas, 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.