Alert archive / Colorado / Wind Advisories in 2018

Wind Advisory 10, NWS Grand Junction, CO

August 27, 20187 counties in Colorado

NWS Grand Junction, CO issued this wind advisory at Aug 27, 2018, 1:35 AM MDT for 7 counties in Colorado. It took effect at Aug 27, 2018, 11:00 AM MDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Aug 27, 2018, 1:35 AM MDT (07:35 UTC)
In effect from: Aug 27, 2018, 11:00 AM MDT
Expired: Aug 27, 2018, 8:15 PM MDT
In force: 9 hr
Issued by: NWS Grand Junction, CO

Counties Eagle County, CO, Garfield County, CO, Mesa County, CO, Moffat County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO

The radar

The Grand Junction radar (KGJX), 95 km from the middle of the area, began a volume at 07:38 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

Riverton, WY (KRIW), launched 00:00Z, 7.6 hours before the alert went out and 370 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: 2 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 3637 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 40 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 Aug 26, 11:41 PM MDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 26, 11:41 PM MDT, 1 hour 54 minutes before

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Hazardous weather outlook, Aug 26, 8:58 PM MDT, 4 hours 37 minutes before

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In the hours before

Local storm report, Aug 26, 7:53 PM MDT, 5 hours 42 minutes before

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Special weather statement, Aug 26, 10:22 PM MDT, 3 hours 13 minutes before

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Special weather statement, Aug 26, 11:15 PM MDT, 2 hours 20 minutes before

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Special weather statement, Aug 26, 11:56 PM MDT, 1 hour 39 minutes before

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Special weather statement, Aug 27, 12:23 AM MDT, 1 hour 12 minutes before

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Local storm report, Aug 27, 12:57 AM MDT, 38 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
Aug 26, 6:08 PM MDT	Areal Flood Advisory	GJT	Montrose	3 hr
Aug 26, 6:48 PM MDT	Special Weather Statement	GJT	Dolores	42 min
Aug 26, 7:20 PM MDT	Special Weather Statement	GJT	Montezuma	40 min
Aug 26, 10:22 PM MDT	Special Weather Statement	GJT		38 min
Aug 26, 11:15 PM MDT	Special Weather Statement	GJT	Rio Blanco	45 min
Aug 26, 11:56 PM MDT	Special Weather Statement	GJT	Mesa	34 min
Aug 27, 12:23 AM MDT	Special Weather Statement	GJT	Garfield	37 min
Aug 27, 9:44 AM MDT	Red Flag Warning	GJT	Montrose, San Miguel	11 hr

Nearby

Wind Advisories in Colorado, 2018 Every wind advisory in 2018

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.