Alert archive / Colorado / Red Flag Warnings in 2020
Red Flag Warning 39, NWS Grand Junction, CO
NWS Grand Junction, CO issued this red flag warning at Jul 12, 2020, 1:48 PM MDT for 11 counties in Colorado; 4 counties in Utah. It took effect at Jul 14, 2020, 12:00 PM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 12, 2020, 1:48 PM MDT (19:48 UTC)
- In effect from
- Jul 14, 2020, 12:00 PM MDT
- Expired
- Jul 14, 2020, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Grand Junction, CO
Counties Delta County, CO, Dolores County, CO, Garfield County, CO, La Plata County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, Rio Blanco County, CO, San Miguel County, CO, Daggett County, UT, Grand County, UT, San Juan County, UT, Uintah County, UT
The radar
The Grand Junction radar (KGJX), 39 km from the middle of the area, began a volume at 19:50 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
Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 7.8 hours before the alert went out and 456 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3565 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this red flag warning went out, 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 this red flag warning went out at Jul 12, 11:27 AM MDT, 2 hours 21 minutes earlier.
Area forecast discussion, Jul 12, 11:27 AM MDT, 2 hours 21 minutes before
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</html>Hazardous weather outlook, Jul 12, 4:31 AM MDT, 9 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 431 AM MDT Sun Jul 12 2020 COZ001>014-017>023-UTZ023>025-028-131045- 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-Eastern Uinta Mountains-Eastern Uinta Basin- Tavaputs Plateau-La Sal and Abajo Mountains- 431 AM MDT Sun Jul 12 2020 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. Another hot and dry day will result in valley temps near 100 degrees on Sunday. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. Winds will increase leading to the potential for critical fire weather conditions on Monday and Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. UTZ022-027-029-131045- Southeast Utah-Arches/Grand Flat-Canyonlands/Natural Bridges- 431 AM MDT Sun Jul 12 2020 This hazardous weather outlook is for portions of east central Utah and southeast Utah. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. Extremely hot weather is likely in the lower canyons with temperatures in the 100-110 degree range. Hot temperatures will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. Temperatures will drop back by a few degrees with evening showers possible in the higher terrain. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Jul 12, 12:46 PM MDT, 1 hour 2 minutes before
Special Weather Statement National Weather Service Grand Junction CO 1246 PM MDT Sun Jul 12 2020 UTZ024-121915- Eastern Uinta Basin UT- 1246 PM MDT Sun Jul 12 2020 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL UINTAH COUNTY UNTIL 115 PM MDT... At 1246 PM MDT, Doppler radar was tracking a strong thunderstorm 14 miles south of Myton, or 21 miles south of Fort Duchesne, moving east at 15 mph. Wind gusts of 40 to 55 mph will be possible with this storm. This storm will remain over mainly rural areas of west central Uintah County. LAT...LON 4011 10997 4014 10981 3986 10979 3988 10997 TIME...MOT...LOC 1846Z 267DEG 13KT 3999 10998 KJS
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:08 AM MDT | Fire Weather Watch | GJT | Delta, Dolores, Garfield, La Plata, Mesa, Moffat and 5 more | 12 hr |
| Jul 12, 12:46 PM MDT | Special Weather Statement | GJT | Uintah | 29 min |
Nearby
Red Flag Warnings in Colorado, 2020Red Flag Warnings in Utah, 2020Every red flag warning in 2020
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.