Flash Flood Warning 3, NWS Denver/Boulder, CO

Issued

Jun 18, 2018, 10:57 PM MDT (04:57 UTC)

Expired

Jun 19, 2018, 2:00 AM MDT

In force

3 hr

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Flood severity

None

Counties Morgan County, CO, Weld County, CO

The Denver radar (KFTG), 59 km from the middle of the area, began a volume at 04:57 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

944 
WGUS55 KBOU 190457
FFWBOU
COC087-123-190800-
/O.NEW.KBOU.FF.W.0003.180619T0457Z-180619T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
1057 PM MDT MON JUN 18 2018

The National Weather Service in Denver Colorado has issued a

* Flash Flood Warning for...
  South central Weld County in northeastern Colorado...
  Northwestern Morgan County in northeastern Colorado...

* Until 200 AM MDT.

* At 1055 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain along a line extending from near Jackson Reservoir to 4 
  miles northeast of Hudson. The storms are nearly stationary. Up to 
  three inches of rain have already fallen. Flash flooding is 
  expected to begin shortly. The Weld County Law Enforcement was 
  reporting some water already affecting travel in the Hudson and 
  Keenseburg areas. 

* Some locations that will experience flooding include...
  Hudson, Keenesburg, Orchard, Jackson Reservoir, Riverside
  Reservoir, Goodrich and Roggen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.  Turn around, don't drown. You never know how 
deep the water really is, and your vehicle may be swept away. 

Excessive runoff from heavy rainfall will cause flash flooding of 
small creeks and streams, country roads, farmland, and other low 
lying spots.

&&

LAT...LON 4044 10393 4034 10398 4022 10423 4010 10441
      4006 10465 4013 10464 4026 10444 4043 10416

$$

BARJENBRUCH

553 
WGUS75 KBOU 190556
FFSBOU

Flash Flood Statement
National Weather Service Denver CO
1156 PM MDT MON JUN 18 2018

COC087-123-190800-
/O.CON.KBOU.FF.W.0003.000000T0000Z-180619T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Weld CO-Morgan CO-
1156 PM MDT MON JUN 18 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM MDT FOR
SOUTH CENTRAL WELD AND NORTHWESTERN MORGAN COUNTIES...

At 1149 PM MDT, thunderstorms producing heavy rain were located along
a line extending from 5 miles south of Milton Reservoir to 4 miles
north of Roggen to near Jackson Reservoir, or along a line extending 
from 19 miles south of Greeley to 17 miles northwest of Fort Morgan, 
and is stationary. Up to three inches of rain have already fallen. 
Flash flooding is occurring. 

Weld County Law Enforcement has reported the following 
flood information...

I-76 frontage road and Weld County Road 53 has water flowing over 
the road and part of the road is completely washed out. Impassable 
roadways at Weld County Road 8 and 45, Weld County Road 16 and 63, 
and Highway 52 and Weld County Road 49.  Partial flooding of roads 
was also observed at I-76 and Weld County Road 55. 

Some locations that will experience flooding include...Hudson,
Keenesburg, Orchard, Jackson Reservoir, Riverside Reservoir, 
Goodrich and Roggen.

This includes the following streams and drainages...Kiowa Creek...
Sand Creek...South Platte River...Sanborn Draw...Box Elder Creek...
East Lost Creek and Lost Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4044 10393 4034 10398 4022 10423 4010 10441
      4006 10465 4013 10464 4026 10444 4043 10416

$$

BARJENBRUCH

Flash Flood Warnings in Colorado, 2018Every flash flood warning in 2018

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.