Alert archive / Colorado / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Denver/Boulder, CO

May 24, 201413 counties in Colorado

NWS Denver/Boulder, CO issued this flash flood watch at May 24, 2014, 5:50 AM MDT for 13 counties in Colorado. It took effect at May 24, 2014, 1:00 PM MDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: May 24, 2014, 5:50 AM MDT (11:50 UTC)
In effect from: May 24, 2014, 1:00 PM MDT
Expired: May 24, 2014, 11:18 PM MDT
In force: 10 hr
Issued by: NWS Denver/Boulder, CO
Flood severity: None

Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 39 km from the middle of the area, began a volume at 11:49 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, 11.8 hours before the alert went out and 151 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: 530 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -72 m²/s²
0-3 km storm-relative helicity: -15 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 flash flood watch 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 flash flood watch went out at May 24, 3:51 AM MDT, 1 hour 59 minutes earlier.

Area forecast discussion, May 24, 3:51 AM MDT, 1 hour 59 minutes before

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Hazardous weather outlook, May 24, 4:27 AM MDT, 1 hour 23 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
May 23, 6:05 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver	115 min
May 23, 7:20 PM MDT	Flash Flood Warning	BOU	Boulder	3 hr
May 23, 7:21 PM MDT	Flash Flood Warning	BOU	Larimer	3 hr
May 23, 8:10 PM MDT	Flash Flood Warning	BOU	Larimer, Weld	3 hr
May 23, 9:20 PM MDT	Areal Flood Advisory	BOU	Weld	4 hr
May 23, 10:06 PM MDT	Areal Flood Warning	BOU	Larimer	4 hr
May 23, 10:10 PM MDT	Flash Flood Warning	BOU	Weld	3 hr
May 23, 10:26 PM MDT	Areal Flood Advisory	BOU	Adams, Denver, Weld	3 hr
May 23, 11:09 PM MDT	Areal Flood Advisory	BOU	Larimer	96 min
May 24, 4:42 PM MDT	Special Weather Statement	BOU	Grand	33 min
May 24, 5:11 PM MDT	Special Weather Statement	BOU	Jackson	34 min
May 24, 5:37 PM MDT	Special Weather Statement	BOU	Jefferson	23 min
May 24, 5:58 PM MDT	Special Weather Statement	BOU	Douglas	47 min

Nearby

Flash Flood Watches in Colorado, 2014 Every flash flood watch in 2014

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.