Flash Flood Warning 45, NWS Grand Junction, CO

Issued

Jul 28, 2021, 2:14 PM MDT (20:14 UTC)

Expired

Jul 28, 2021, 5:15 PM MDT

In force

3 hr

Issued by

NWS Grand Junction, CO

Area

Storm-based polygon

Flood severity

None

County San Miguel County, CO

The Grand Junction radar (KGJX), 130 km from the middle of the area, began a volume at 20:13 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.

912 
WGUS55 KGJT 282014
FFWGJT
COC113-282315-
/O.NEW.KGJT.FF.W.0045.210728T2014Z-210728T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Junction CO
214 PM MDT Wed Jul 28 2021

The National Weather Service in Grand Junction has issued a

* Flash Flood Warning for...
  Southeastern San Miguel County in southwestern Colorado...

* Until 515 PM MDT.

* At 214 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1 inch of rain 
  has fallen. The expected rainfall rate is 0.5 to 1 inch in 1 hour. 
  Additional rainfall amounts of 0.5 to 1 inch are possible in the 
  warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Mountain Village, Sawpit and Placerville.

This includes the following highways...
	Colorado 145 between mile markers 61 and 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
dangerous in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3782 10790 3783 10795 3784 10795 3783 10797
      3786 10799 3786 10802 3788 10804 3791 10809
      3795 10812 3801 10809 3803 10807 3800 10802
      3800 10799 3796 10791 3796 10786 3793 10786
      3788 10783

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR

$$

ERW

930 
WGUS75 KGJT 282312
FFSGJT

Flash Flood Statement
National Weather Service Grand Junction CO
512 PM MDT Wed Jul 28 2021

COC113-282322-
/O.EXP.KGJT.FF.W.0045.000000T0000Z-210728T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Miguel CO-
512 PM MDT Wed Jul 28 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MDT THIS AFTERNOON FOR 
SOUTHEASTERN SAN MIGUEL COUNTY...

The threat for heavy rain has ended. Flooding is no longer expected 
to pose a threat. However, light to moderate rain will continue for 
the next few hours. Please continue to heed remaining road closures.

LAT...LON 3782 10790 3783 10795 3784 10795 3783 10797
      3786 10799 3786 10802 3788 10804 3791 10809
      3795 10812 3801 10809 3803 10807 3800 10802
      3800 10799 3796 10791 3796 10786 3793 10786
      3788 10783

$$

MMS

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.