Alert archive / South Dakota / Heat Advisories in 2018
Heat Advisory 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this heat advisory at Jul 3, 2018, 3:43 AM CDT for 12 counties in South Dakota. It took effect at Jul 3, 2018, 2:00 PM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Jul 3, 2018, 3:43 AM CDT (08:43 UTC)
- In effect from
- Jul 3, 2018, 2:00 PM CDT
- Expired
- Jul 3, 2018, 8:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Sioux Falls, SD
Counties Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Sanborn County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 120 km from the middle of the area, began a volume at 08:45 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, 8.7 hours before the alert went out and 145 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
- 2124 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1720 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 8.5
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 2, 11:03 PM CDT, 4 hours 40 minutes earlier.
Area forecast discussion, Jul 2, 11:03 PM CDT, 4 hours 40 minutes before
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</html>Hazardous weather outlook, Jul 2, 7:24 PM CDT, 8 hours 19 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 724 PM CDT Mon Jul 2 2018 IAZ002-003-012>014-020>022-031-032-MNZ090-NEZ013-014-SDZ071- 040030- Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Jackson-Dixon-Dakota-Union- 724 PM CDT Mon Jul 2 2018 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, and southeast South Dakota. .DAY ONE...Tonight Moderate to major flooding will continue on many rivers. Those with interest along area rivers will want to remain alert. For specific river details, visit: https://water.weather.gov. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Heat indices will climb to near 100 Wednesday afternoon. There is a chance of thunderstorms Wednesday night. A few of the storms may be strong producing strong winds and hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. IAZ001-MNZ080-081-089-097-098-SDZ056-060>062-065>070-040030- Lyon IA-Murray-Cottonwood-Nobles-Pipestone-Rock-Moody-Hanson- McCook-Minnehaha-Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton- Clay SD- 724 PM CDT Mon Jul 2 2018 This Hazardous Weather Outlook is for portions of northwest Iowa, southwest Minnesota, east central South Dakota, and southeast South Dakota. .DAY ONE...Tonight There is a slight chance of thunderstorms tonight into Tuesday morning. These storms are not expected to be severe. Minor to moderate flooding will continue on some rivers, especially the Vermillion and Big Sioux. Those with interest along area rivers will want to remain alert. For specific river details, visit: https://water.weather.gov. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible across the region Tuesday night. These storms are not expected to be severe. Additional storms are possible Wednesday night. A few of these storms may be strong producing strong winds or large hail. Heat and humidity will increase across the region creating heat indices near 100 Wednesday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. MNZ071-072-SDZ038>040-050-052>055-057>059-063-064-040030- Lincoln MN-Lyon MN-Beadle-Kingsbury-Brookings-Gregory-Jerauld- Sanborn-Miner-Lake-Brule-Aurora-Davison-Charles Mix-Douglas- 724 PM CDT Mon Jul 2 2018 This Hazardous Weather Outlook is for portions of southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...Tonight Thunderstorms are possible this evening into the overnight. A few storms may be strong to severe producing large hail up to the size of ping pong balls and damaging winds up to 60 mph. Monday .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Heat indices will approach 100 degrees Tuesday and Wednesday afternoon. Thunderstorms are once again possible Tuesday and Wednesday evenings into the overnight hours. A few storms may be strong producing large hail and damaging winds. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible into tonight.
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 10:11 AM CDT | River Flood Warning | FSD | Minnehaha | 46 hr |
| Jul 3, 11:11 AM CDT | River Flood Warning | FSD | Minnehaha | 47 hr |
| Jul 3, 6:37 PM CDT | River Flood Warning | FSD | Moody | 38 hr |
| Jul 3, 10:11 AM CDT | River Flood Warning | FSD | Lyon | 53 hr |
| Jul 3, 10:11 AM CDT | River Flood Warning | FSD | Lyon | 4 days |
| Jul 3, 11:11 AM CDT | River Flood Warning | FSD | Lyon, Sioux | 4 days |
| Jul 3, 2:20 AM CDT | Flash Flood Warning | FSD | Lyon | 11 hr |
| Jul 3, 4:39 AM CDT | Flash Flood Warning | FSD | Lyon | 9 hr |
| Jul 3, 5:36 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray, Pipestone | 13 min |
| Jul 3, 6:37 AM CDT | Flash Flood Warning | FSD | Murray | 7 hr |
| Jul 3, 7:11 AM CDT | Flash Flood Warning | FSD | Cottonwood | 6 hr |
| Jul 3, 7:24 AM CDT | Flash Flood Warning | FSD | Pipestone | 6 hr |
| Jul 3, 7:50 AM CDT | Flash Flood Warning | FSD | Murray, Nobles, Pipestone, Rock | 5 hr |
| Jul 3, 8:28 AM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles | 47 min |
| Jul 3, 8:31 AM CDT | Flash Flood Warning | FSD | Murray, Nobles | 5 hr |
| Jul 3, 9:52 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 38 min |
| Jul 3, 10:05 AM CDT | River Flood Warning | FSD | Lyon | 4 days |
| Jul 3, 11:42 AM CDT | River Flood Warning | FSD | Pipestone | 24 hr |
| Jul 3, 1:09 PM CDT | Areal Flood Warning | FSD | Cottonwood, Lyon, Murray, Pipestone | 24 hr |
Nearby
Heat Advisories in South Dakota, 2018Every 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.