Alert archive / South Dakota / Heat Advisories in 2017
Heat Advisory 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this heat advisory at Jul 11, 2017, 4:26 AM CDT for 20 counties in South Dakota; Plymouth County, Sioux County, Woodbury County, Iowa. It took effect at Jul 11, 2017, 2:00 PM CDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2017, 4:26 AM CDT (09:26 UTC)
- In effect from
- Jul 11, 2017, 2:00 PM CDT
- Expired
- Jul 11, 2017, 6:59 PM CDT
- In force
- 5 hr
- Issued by
- NWS Sioux Falls, SD
All 23 counties
Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 77 km from the middle of the area, began a volume at 09:28 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 00:00Z, 9.4 hours before the alert went out and 258 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.
- Mixed-layer CAPE
- 2072 J/kg
- Mixed-layer CIN
- -206 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Jul 11, 3:23 AM CDT, 1 hour 3 minutes earlier.
Area forecast discussion, Jul 11, 3:23 AM CDT, 1 hour 3 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jul 11, 3:49 AM CDT, 37 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 349 AM CDT Tue Jul 11 2017 MNZ071-072-080-081-089-090-097-098-SDZ039-040-055-056-120900- Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson-Pipestone- Rock-Kingsbury-Brookings-Lake-Moody- 349 AM CDT Tue Jul 11 2017 This Hazardous Weather Outlook is for portions of southwest Minnesota and east central South Dakota. .DAY ONE...Today and Tonight Hot and humid conditions are in store for the region. Heat index values in the 90s are expected. Exercise caution if spending time outdoors in the afternoon. Scattered strong to severe thunderstorms possible late this afternoon and evening. The greatest risk for severe storms will be along the Buffalo Ridge area in southwest Minnesota. Damaging winds up to 70 mph and up to golf ball size hail are the main threats. .DAYS TWO THROUGH SEVEN...Wednesday through Monday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. IAZ001>003-012>014-020>022-031-032-NEZ013-014-SDZ038-050-052>054- 057>071-120900- Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Dixon-Dakota-Beadle-Gregory-Jerauld- Sanborn-Miner-Brule-Aurora-Davison-Hanson-McCook-Minnehaha- Charles Mix-Douglas-Hutchinson-Turner-Lincoln SD-Bon Homme- Yankton-Clay SD-Union- 349 AM CDT Tue Jul 11 2017 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Hot and humid conditions are in store for the region. Heat index values in the three digits are expected this afternoon into early evening. Hot temperatures and high humidity can create heat- related illness. Take extra caution if spending an extended period of time outdoors. Isolated to scattered thunderstorms possible in the afternoon and evening. A few of the storms could become strong to severe with large hail up to half dollar size and damaging winds to 60 mph. .DAYS TWO THROUGH SEVEN...Wednesday through Monday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
Nearby
Heat Advisories in South Dakota, 2017Heat Advisories in Iowa, 2017Every heat advisory in 2017
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.