Alert archive / Colorado / Heat Advisories in 2021
Heat Advisory 2, NWS Grand Junction, CO
NWS Grand Junction, CO issued this heat advisory at Jul 10, 2021, 3:19 AM MDT for 5 counties in Colorado; San Juan County, Utah. It took effect at Jul 10, 2021, 12:00 PM MDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jul 10, 2021, 3:19 AM MDT (09:19 UTC)
- In effect from
- Jul 10, 2021, 12:00 PM MDT
- Expired
- Jul 10, 2021, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Grand Junction, CO
Counties Archuleta County, CO, Dolores County, CO, La Plata County, CO, Montezuma County, CO, San Miguel County, CO, San Juan County, UT
The radar
The Grand Junction radar (KGJX), 171 km from the middle of the area, began a volume at 09:20 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 00:00Z, 9.3 hours before the alert went out and 318 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
- 863 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 3438 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Grand Junction, CO wrote its last area forecast discussion before this heat advisory went out at Jul 9, 5:25 PM MDT, 9 hours 54 minutes earlier.
Area forecast discussion, Jul 9, 5:25 PM MDT, 9 hours 54 minutes before
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</html>Hazardous weather outlook, Jul 9, 3:21 AM MDT, 23 hours 58 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 321 AM MDT Fri Jul 9 2021 COZ001>014-017>023-UTZ022>025-027>029-100930- 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- 321 AM MDT Fri Jul 9 2021 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Hot weather is expected again, with triple digit heat for the lower desert valleys. Critical fire weather is possible across portions of northwest Colorado and northeast Utah this afternoon. Scattered showers and storms could produce strong winds and brief heavy rainfall. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Critical fire weather is possible across portions of southwest Colorado and southeast Utah tomorrow. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
Nearby
Heat Advisories in Colorado, 2021Heat Advisories in Utah, 2021Every heat advisory in 2021
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.