Severe Thunderstorm Warning 139, NWS Denver/Boulder, CO

Issued

Aug 19, 2021, 4:17 PM MDT (22:17 UTC)

Expired

Aug 19, 2021, 5:00 PM MDT

In force

43 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Hail

1.5 in

Wind

60.0 mph

County Adams County, CO

The Denver radar (KFTG), 29 km from the middle of the area, began a volume at 22:17 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.

335 
WUUS55 KBOU 192217
SVRBOU
COC001-192300-
/O.NEW.KBOU.SV.W.0139.210819T2217Z-210819T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
417 PM MDT Thu Aug 19 2021

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  Central Adams County in northeastern Colorado...

* Until 500 PM MDT.

* At 417 PM MDT, a severe thunderstorm was located 6 miles north of
  Strasburg, or 33 miles east of Denver, moving northeast at 25 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees. People and 
           animals outdoors will be injured. Expect hail damage to 
           roofs, siding, windows, and vehicles.

* This severe thunderstorm will remain over mainly rural areas of
  central Adams County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3993 10404 3974 10431 3974 10435 3988 10446
      4000 10433 4000 10410
TIME...MOT...LOC 2217Z 224DEG 21KT 3983 10434 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RPK

047 
WWUS55 KBOU 192244
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
444 PM MDT Thu Aug 19 2021

COC001-192300-
/O.CON.KBOU.SV.W.0139.000000T0000Z-210819T2300Z/
Adams CO-
444 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR NORTH CENTRAL ADAMS COUNTY...

At 443 PM MDT, a severe thunderstorm was located 8 miles west of
Leader, or 30 miles southwest of Fort Morgan, moving northeast at 25
mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees. People and 
         animals outdoors will be injured. Expect hail damage to 
         roofs, siding, windows, and vehicles.

This severe thunderstorm will remain over mainly rural areas of north
central Adams County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3984 10417 3983 10421 3993 10432 4000 10429
      4000 10410 3993 10404
TIME...MOT...LOC 2243Z 224DEG 21KT 3994 10420 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RPK

661 
WWUS55 KBOU 192301 RRA
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
501 PM MDT Thu Aug 19 2021

COC001-192311-
/O.EXP.KBOU.SV.W.0139.000000T0000Z-210819T2300Z/
Adams CO-
501 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ADAMS COUNTY HAS
EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
northeastern Colorado.

LAT...LON 3984 10417 3983 10421 3993 10432 4000 10429
      4000 10410 3993 10404
TIME...MOT...LOC 2301Z 224DEG 21KT 4001 10411 

$$

RPK

Severe Thunderstorm Warnings in Colorado, 2021Every severe thunderstorm 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.