Alert archive / Nebraska / Heat Advisories in 2017
Heat Advisory 4, NWS North Platte, NE
NWS North Platte, NE issued this heat advisory at Jul 19, 2017, 2:12 PM MDT for 7 counties in Nebraska. It took effect at Jul 20, 2017, 12:00 PM MDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2017, 2:12 PM MDT (20:12 UTC)
- In effect from
- Jul 20, 2017, 12:00 PM MDT
- Expired
- Jul 20, 2017, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS North Platte, NE
Counties Chase County, NE, Custer County, NE, Frontier County, NE, Garfield County, NE, Hayes County, NE, Holt County, NE, Wheeler County, NE
The radar
The North Platte radar (KLNX), 91 km from the middle of the area, began a volume at 20:16 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.2 hours before the alert went out and 64 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
- 911 J/kg
- Mixed-layer CIN
- -333 J/kg
- Mixed-layer LCL
- 1664 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 19, 2:11 PM MDT, 1 minute earlier.
Area forecast discussion, Jul 19, 2:11 PM MDT, 1 minute before
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</html>Hazardous weather outlook, Jul 19, 2:12 PM MDT, 0 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service North Platte NE 312 PM CDT Wed Jul 19 2017 NEZ004>010-022>029-035>038-056>059-069>071-094-202015- Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden- Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson- Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier- Western Cherry- 312 PM CDT Wed Jul 19 2017 /212 PM MDT Wed Jul 19 2017/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...TONIGHT. Heat index values will exceed 100 degrees across much of western and north central Nebraska during the early evening. Isolated strong to briefly severe thunderstorms are possible this evening, mainly along and north of a line from Oshkosh to Tryon to Burwell. The best chances exist this evening into the small hours. Large hail and damaging winds are the main hazards. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. Heat index values are likely to reach or exceed 100 degrees Thursday and Friday across parts of southwest and north central Nebraska. Additional heat advisories are in place Thursday for parts of southwest and south central Nebraska. Scattered short-lived severe thunderstorms are possible along and north of a line from Oshkosh to Elsmere to O'Neill. Elsewhere, isolated strong to briefly severe thunderstorms are possible. Current thinking is the best window for thunderstorms will be Thursday evening and night. Damaging winds and hail are the main hazards, locally heavy rainfall will be possible as well. While thunderstorms are forecast Friday and beyond with the best chances occurring mainly in the afternoon and evening, the risk of severe thunderstorms is low at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. && Get your weather, hydrological, and climate information at http://www.weather.gov/northplatte
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 6:01 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 59 min |
| Jul 18, 6:04 PM MDT | Special Weather Statement | LBF | Hayes | 41 min |
| Jul 18, 6:26 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Keith, Perkins | 23 min |
| Jul 18, 7:01 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 44 min |
| Jul 18, 7:42 PM MDT | Special Weather Statement | LBF | Chase | 48 min |
| Jul 18, 7:47 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 16 min |
| Jul 19, 4:00 PM MDT | Severe Thunderstorm Warning | LBF | Boyd, Holt | 45 min |
| Jul 19, 4:52 PM MDT | Severe Thunderstorm Warning | LBF | Holt | 38 min |
| Jul 19, 5:30 PM MDT | Severe Thunderstorm Warning | LBF | Holt | 60 min |
Nearby
Heat Advisories in Nebraska, 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.