Alert archive / Iowa / Heat Advisories in 2018

Heat Advisory 2, NWS Sioux Falls, SD

June 14, 2018Clay County, Union County, Yankton County, South Dakota; 10 counties in Iowa

NWS Sioux Falls, SD issued this heat advisory at Jun 14, 2018, 2:50 PM CDT for Clay County, Union County, Yankton County, South Dakota; 10 counties in Iowa. It took effect at Jun 15, 2018, 1:00 PM CDT. It was in force for 54 hr.

The area

The counties it named.

The facts

Issued: Jun 14, 2018, 2:50 PM CDT (19:50 UTC)
In effect from: Jun 15, 2018, 1:00 PM CDT
Expired: Jun 17, 2018, 7:00 PM CDT
In force: 54 hr
Issued by: NWS Sioux Falls, SD

Counties Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Clay County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 99 km from the middle of the area, began a volume at 19:53 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

Omaha, NE (KOAX), launched 12:00Z, 7.8 hours before the alert went out and 180 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: 1543 J/kg
Mixed-layer CIN: -305 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 312 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.2

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 Sioux Falls, SD wrote its last area forecast discussion before this heat advisory went out at Jun 14, 12:18 PM CDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jun 14, 12:18 PM CDT, 2 hours 32 minutes before

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Hazardous weather outlook, Jun 14, 12:39 PM CDT, 2 hours 11 minutes before

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In the hours before

Local storm report, Jun 14, 10:09 AM CDT, 4 hours 41 minutes before

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Local storm report, Jun 14, 10:11 AM CDT, 4 hours 39 minutes before

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Local storm report, Jun 14, 10:12 AM CDT, 4 hours 38 minutes before

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Local storm report, Jun 14, 11:27 AM CDT, 3 hours 23 minutes before

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Local storm report, Jun 14, 12:09 PM CDT, 2 hours 41 minutes before

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Local storm report, Jun 14, 12:35 PM CDT, 2 hours 15 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 3:15 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth, Woodbury	30 min
Jun 14, 3:41 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	34 min
Jun 14, 4:18 AM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	27 min
Jun 14, 5:32 AM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	28 min
Jun 14, 6:20 AM CDT	Severe Thunderstorm Warning	FSD	Lyon, Osceola	12 min
Jun 14, 7:01 AM CDT	Flash Flood Warning	FSD	Lyon, O'Brien, Osceola	3 hr
Jun 14, 7:37 AM CDT	Flash Flood Warning	FSD	Buena Vista, Clay	3 hr
Jun 14, 10:08 AM CDT	River Flood Warning	FSD	Buena Vista, Clay	38 days
Jun 14, 10:41 AM CDT	Areal Flood Warning	FSD	O'Brien, Sioux	24 hr
Jun 14, 7:14 AM CDT	Severe Thunderstorm Warning	FSD	Murray, Nobles	16 min
Jun 14, 7:42 AM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Murray	18 min

Nearby

Heat Advisories in Iowa, 2018 Heat Advisories in South Dakota, 2018 Every heat advisory in 2018

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.