Alert archive / Colorado / Red Flag Warnings in 2020
Red Flag Warning 10, NWS Grand Junction, CO
NWS Grand Junction, CO issued this red flag warning at May 11, 2020, 11:05 AM MDT for 9 counties in Colorado. It took effect at May 12, 2020, 12:00 PM MDT. It was in force for 9 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
- May 11, 2020, 11:05 AM MDT (17:05 UTC)
- In effect from
- May 12, 2020, 12:00 PM MDT
- Expired
- May 12, 2020, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Grand Junction, CO
Counties Delta County, CO, Dolores County, CO, Garfield County, CO, La Plata County, CO, Mesa County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, San Miguel County, CO
The radar
The Grand Junction radar (KGJX), 88 km from the middle of the area, began a volume at 17:06 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, 5.1 hours before the alert went out and 385 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
- 1842 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 163 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 May 11, 6:13 AM MDT, 4 hours 52 minutes earlier.
Area forecast discussion, May 11, 6:13 AM MDT, 4 hours 52 minutes before
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</html>Hazardous weather outlook, May 11, 5:05 AM MDT, 6 hours before
Hazardous Weather Outlook National Weather Service Grand Junction CO 505 AM MDT Mon May 11 2020 COZ001>014-017>023-UTZ022>025-027>029-121115- 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- 505 AM MDT Mon May 11 2020 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Widespread convection is expected today with some stronger storms likely this afternoon and evening. Gusty winds and heavy rain are expected to impact western Colorado. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Dry air is expected to move in to lower elevations of the western CWA along with gusty winds leading to elevated fire weather concerns Tuesday and potentially Wednesday. Daily chances for showers start Wednesday afternoon favoring northern portions of the forecast area through the remainder of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected, however spotters are encouraged to relay rainfall amounts, any observed flooding, hail, or gusty winds to the National Weather Service in Grand Junction.
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 4:00 AM MDT | Fire Weather Watch | GJT | Delta, Dolores, Garfield, La Plata, Mesa, Montezuma and 3 more | 7 hr |
| May 11, 1:45 PM MDT | Special Weather Statement | GJT | Delta | 45 min |
| May 11, 2:25 PM MDT | Special Weather Statement | GJT | Delta | 50 min |
| May 11, 2:32 PM MDT | Severe Thunderstorm Warning | GJT | Delta, Montrose | 28 min |
| May 11, 2:58 PM MDT | Severe Thunderstorm Warning | GJT | Montrose | 32 min |
| May 11, 4:15 PM MDT | Special Weather Statement | GJT | Mesa | 45 min |
| May 11, 4:24 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Mesa | 36 min |
| May 11, 4:57 PM MDT | Severe Thunderstorm Warning | GJT | Mesa | 33 min |
| May 11, 5:22 PM MDT | Special Weather Statement | GJT | Mesa | 38 min |
| May 11, 5:30 PM MDT | Special Weather Statement | GJT | Delta | 30 min |
| May 11, 1:03 PM MDT | Special Weather Statement | GJT | Uintah | 42 min |
| May 11, 1:20 PM MDT | Special Weather Statement | GJT | Uintah | 40 min |
| May 11, 2:11 PM MDT | Special Weather Statement | GJT | Uintah | 49 min |
Nearby
Red Flag Warnings in Colorado, 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.