Flash Flood Warning 52, NWS Denver/Boulder, CO

Issued

Jul 30, 2021, 5:36 PM MDT (23:36 UTC)

Expired

Jul 30, 2021, 8:31 PM MDT

In force

3 hr

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Emergency

Flash flood emergency

Damage threat

Catastrophic

Flood severity

None

County Larimer County, CO

The Cheyenne radar (KCYS), 92 km from the middle of the area, began a volume at 23:35 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.

128 
WGUS55 KBOU 302336
FFWBOU
COC069-310245-
/O.NEW.KBOU.FF.W.0052.210730T2336Z-210731T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
536 PM MDT Fri Jul 30 2021

...FLASH FLOOD EMERGENCY FOR MILLER FORK, NORTH FORK OF THE BIG 
THOMPSON...

The National Weather Service in Denver has issued a

* Flash Flood Warning for...
  Southern Larimer County in north central Colorado...

* Until 845 PM MDT.

* At 536 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  This is a FLASH FLOOD EMERGENCY for Miller Fork, north fork of the 
  Big Thompson. This is a PARTICULARLY DANGEROUS SITUATION. SEEK 
  HIGHER GROUND NOW!

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar and Law Enforcement reporting dangerous
           flooding.

  IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
           HIGHER GROUND NOW! Life threatening flash flooding of
           creeks and streams, roads, and low lying areas.

* Some locations that will experience flash flooding include...
  Drake and Glen Haven.

This includes the following additional locations...
	The Retreat and Storm Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Move to higher ground now. Act quickly to protect your life.

Move to higher ground now! This is an extremely dangerous and 
life-threatening situation. Do not attempt to travel unless you are 
fleeing an area subject to flooding or under an evacuation order.


&&

LAT...LON 4051 10543 4051 10538 4050 10531 4045 10528
      4043 10528 4040 10531 4038 10537 4040 10541
      4041 10547 4043 10551 4049 10549

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC

$$

Bowen

001 
WGUS75 KBOU 310231
FFSBOU

Flash Flood Statement
National Weather Service Denver CO
831 PM MDT Fri Jul 30 2021

COC069-310241-
/O.CAN.KBOU.FF.W.0052.000000T0000Z-210731T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Larimer CO-
831 PM MDT Fri Jul 30 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN LARIMER COUNTY...

The heavy rain has ended. Flooded roads could still pose a threat. 
Please continue to heed remaining road closures and never drive over 
a flooded road.

A Flash Flood Watch remains in effect until 900 PM MDT Saturday for 
Portions of central and north central Colorado.

LAT...LON 4051 10543 4051 10538 4050 10531 4045 10528
      4043 10528 4040 10531 4038 10537 4040 10541
      4041 10547 4043 10551 4049 10549

$$

Bowen

Flash Flood Warnings in Colorado, 2021Every flash flood warning in 2021

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.