Alert archive / Colorado / Areal Flood Advisories in 2018

Areal Flood Advisory 21, NWS Denver/Boulder, CO

July 22, 2018Lincoln County, Colorado

NWS Denver/Boulder, CO issued this areal flood advisory at Jul 22, 2018, 6:58 PM MDT for Lincoln County, Colorado. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 22, 2018, 6:58 PM MDT (00:58 UTC)
Expired: Jul 22, 2018, 9:00 PM MDT
In force: 2 hr
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 82 km from the middle of the area, began a volume at 01:02 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

Denver, CO (KDEN), launched 00:00Z, 1.0 hours before the alert went out and 101 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: 58 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 2133 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 316 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 areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this areal flood advisory went out at Jul 22, 3:17 PM MDT, 3 hours 41 minutes earlier.

Area forecast discussion, Jul 22, 3:17 PM MDT, 3 hours 41 minutes before

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Hazardous weather outlook, Jul 22, 10:55 AM MDT, 8 hours 3 minutes before

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In the hours before

Special weather statement, Jul 22, 4:48 PM MDT, 2 hours 10 minutes before

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Special weather statement, Jul 22, 4:55 PM MDT, 2 hours 3 minutes before

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Special weather statement, Jul 22, 5:34 PM MDT, 1 hour 24 minutes before

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Special weather statement, Jul 22, 5:44 PM MDT, 1 hour 14 minutes before

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Special weather statement, Jul 22, 6:33 PM MDT, 25 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 6:33 PM MDT	Special Weather Statement	BOU	Lincoln	27 min
Jul 22, 8:58 PM MDT	Areal Flood Advisory	BOU	Lincoln	3 hr
Jul 22, 9:11 PM MDT	Flash Flood Warning	BOU	Lincoln	3 hr
Jul 22, 11:34 PM MDT	Special Weather Statement	BOU	Washington	26 min
Jul 23, 1:25 PM MDT	Severe Thunderstorm Warning	BOU	Park	35 min
Jul 23, 1:51 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Jefferson, Park	24 min
Jul 23, 2:14 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Jefferson	46 min
Jul 23, 2:29 PM MDT	Areal Flood Advisory	BOU	Douglas	87 min
Jul 23, 3:22 PM MDT	Severe Thunderstorm Warning	BOU	Park	23 min
Jul 23, 3:46 PM MDT	Severe Thunderstorm Warning	BOU	Park	29 min
Jul 23, 4:07 PM MDT	Areal Flood Advisory	BOU	Arapahoe, Denver, Douglas, Jefferson	83 min
Jul 23, 4:16 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver, Weld	89 min
Jul 23, 4:43 PM MDT	Special Weather Statement	BOU	Denver	32 min
Jul 23, 4:46 PM MDT	Severe Thunderstorm Warning	BOU	Park	29 min
Jul 23, 5:03 PM MDT	Special Weather Statement	BOU	Douglas	42 min
Jul 23, 5:32 PM MDT	Areal Flood Advisory	BOU	Arapahoe, Douglas, Elbert	38 min
Jul 23, 5:47 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver, Weld	55 min

Nearby

Areal Flood Advisories in Colorado, 2018 Every areal flood 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.