A lightning strike ignited a wildfire 1 mile east of the Utah/Colorado border between Brown's Park and Dinosaur.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GJT wrote it up.
A lightning strike ignited a wildfire 1 mile east of the Utah/Colorado border between Brown's Park and Dinosaur.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before the first event at Jul 31, 1:41 PM MST, 5 minutes earlier.
Area Forecast Discussion National Weather Service Grand Junction CO 241 PM MDT Fri Jul 31 2020 .SHORT TERM...(Tonight through Saturday night) Issued at 240 PM MDT Fri Jul 31 2020 U/A hand analysis is showing ridging extending from the subtropics to the arctic circle over western NOAM. The anomalous heights under the ridge will be stubborn to break down and an extended period of hot...northwest flow is in store for the CWA. This northwest flow can throw a wicked curveball at times...especially when and where convection will fire. Sometimes unexpectedly in the middle of the night thanks to the jet placement aloft. For now the central and southern Colorado and northeast Utah mountains will be favored for orographic flow to initially release the instability and pop storms. Valleys close to the terrain may see some storms roll off as they drift south. Doubtful much rain will be seen in the next few days with gusty outflow winds the main threat. New fire starts also a concern. Hot temperatures will be another concern with highs likely to reach the triple digits over much of the lower desert valleys. Luckily the drier atmosphere will allow radiational cooling to drop lows at least into the lower 70s so heat headlines not planned attm. No relief in this pattern through early next week. .LONG TERM...(Sunday through Friday) Issued at 240 PM MDT Fri Jul 31 2020 High pressure is going to dominate the pattern for the week. Some subtle disturbances riding over the top of the ridge will bring weather to the Front Range, and trigger some moisture to wrap around in our CWA. Pockets of 0.75 inch PW associated with this little splash of extra moisture will keep a low chance of showers and thunderstorms in the forecast, mainly along the Great Divide. Otherwise, the rest of the CWA will be hot and dry, with the lower valleys flirting with triple digit afternoon highs. Models are still hinting at a pattern change mid to late next week, with the high pressure being pushed east with a trough moving into the Pacific Northwest. As the high settles over the Southern Plains, another trough will develop off the California coast, setting the stage for a potential subtropical moisture surge. PW values are forecast to increase into the 0.75-1.00 inch range, which, along with increasing dew points, will lead to higher shower and thunderstorm activity. There are still discrepancies between models, especially in the positioning of the ridge and trough driving the moisture plume, but each subsequent model run has been showing some variation of this pattern, so confidence is growing. && .AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon) Issued at 1149 AM MDT Fri Jul 31 2020 VRF conditions with no ceilings will prevail for the next 24 hours. Most TAF sites will see gusts of 20-25 knots this afternoon, but the gusts will diminish after sunset. Otherwise, winds will be light and terrain driven through the period. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...None. UT...None. && SHORT TERM...15 LONG TERM...BGB AVIATION...BGB/DP
Hazardous Weather Outlook National Weather Service Grand Junction CO 403 AM MDT Fri Jul 31 2020 COZ001>014-017>023-UTZ022>025-027>029-011015- Lower Yampa River Basin-Central Yampa River Basin- Roan and Tavaputs Plateaus-Elkhead and Park Mountains- Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor- Central Colorado River Basin-Grand and Battlement Mesas- Gore and Elk Mountains/Central Mountain Valleys- Central Gunnison and Uncompahgre River Basin- West Elk and Sawatch Mountains-Flat Tops- Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide- Northwest San Juan Mountains-Southwest San Juan Mountains- Paradox Valley/Lower Dolores River- Four Corners/Upper Dolores River-Animas River Basin- San Juan River Basin-Southeast Utah-Eastern Uinta Mountains- Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat- La Sal and Abajo Mountains-Canyonlands/Natural Bridges- 403 AM MDT Fri Jul 31 2020 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Expect isolated thunderstorms to develop this afternoon over the mountains of the Continental Divide. This activity is expected to diminish early this evening, fully dissipating by sunset. Gusty winds will be the primary threat with developing storms. .DAYS TWO THROUGH SEVEN...Saturday through Thursday High pressure will continue to bring warmer and drier conditions. An exception will be along the Continental Divide where isolated to scattered thunderstorms will be possible each afternoon. A monsoonal surge of moisture is possible beginning Thursday portending greater thunderstorm coverage for the end of the coming week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
The national radar mosaic for the moment the first event began.
1 wildfire. Local standard time, as filed.
The Pots Fire began at the end of July due to lightning 1 mile east of the Utah/Colorado border between Brown's Park and Dinosaur. The fire grew to 235 acres before it was contained in early August.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2020Every state in 2020This day in weather historyWarnings in Colorado, July 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 899785.