Alert archive / Colorado / Wind Advisories in 2020

Wind Advisory 5, NWS Grand Junction, CO

June 6, 202013 counties in Colorado; Grand County, San Juan County, Utah

NWS Grand Junction, CO issued this wind advisory at Jun 6, 2020, 8:09 PM MDT for 13 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Jun 7, 2020, 12:00 PM MDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jun 6, 2020, 8:09 PM MDT (02:09 UTC)
In effect from: Jun 7, 2020, 12:00 PM MDT
Expired: Jun 7, 2020, 8:00 PM MDT
In force: 8 hr
Issued by: NWS Grand Junction, CO

Counties Delta County, CO, Dolores County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT

The radar

The Grand Junction radar (KGJX), 16 km from the middle of the area, began a volume at 02:11 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

Salt Lake City I, UT (KSLC), launched 00:00Z, 2.2 hours before the alert went out and 383 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2063 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind 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 wind advisory went out at Jun 6, 7:20 PM MDT, 49 minutes earlier.

Area forecast discussion, Jun 6, 7:20 PM MDT, 49 minutes before

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Hazardous weather outlook, Jun 6, 4:25 AM MDT, 15 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service Grand Junction CO
425 AM MDT Sat Jun 6 2020

COZ001>014-017>023-UTZ022>025-027>029-071030-
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-
425 AM MDT Sat Jun 6 2020

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

A system will be moving over the forecast area today bringing
rain, heavy at times, along with some thunderstorms. The heavy
rain will increase chances for flash flooding, especially over
canyon country and recent burn scars, so a Flash Flood Watch is in
effect for eastern Utah and southwest Colorado through 4 pm.
Gusty winds and hail will be possible through the day under the
stronger thunderstorms. Wind gusts could exceed 60 mph even
without a storm especially above the treeline.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Critical fire weather conditions are possible across Southeast
Utah and southwest Colorado Sunday into Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is needed later this morning and into the
afternoon as the chance for severe thunderstorms increases across
the area. The main threat with these storms will be damaging wind
gusts.

In the hours before

Local storm report, Jun 6, 3:02 PM MDT, 5 hours 7 minutes before

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Local storm report, Jun 6, 3:03 PM MDT, 5 hours 6 minutes before

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Local storm report, Jun 6, 3:04 PM MDT, 5 hours 5 minutes before

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Local storm report, Jun 6, 3:05 PM MDT, 5 hours 4 minutes before

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Local storm report, Jun 6, 3:09 PM MDT, 5 hours before

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Local storm report, Jun 6, 5:16 PM MDT, 2 hours 53 minutes before

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The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 11:03 AM MDT	Special Weather Statement	GJT	Moffat	27 min
Jun 7, 1:46 PM MDT	Red Flag Warning	GJT	Archuleta, Delta, Dolores, Gunnison, Hinsdale, La Plata and 3 more	30 hr
Jun 7, 3:00 PM MDT	Special Weather Statement	GJT	Moffat	30 min
Jun 7, 2:24 PM MDT	Special Weather Statement	GJT	Daggett	36 min
Jun 7, 2:26 PM MDT	Special Weather Statement	GJT	Daggett	34 min

Nearby

Wind Advisories in Colorado, 2020 Wind Advisories in Utah, 2020 Every wind advisory 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.