Tornado Warning 36, NWS Denver/Boulder, CO

Issued

Aug 19, 2021, 3:05 PM MDT (21:05 UTC)

Expired

Aug 19, 2021, 3:30 PM MDT

In force

25 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Tornado

Radar indicated

Hail

1.0 in

Counties Adams County, CO, Weld County, CO

The Denver radar (KFTG), 40 km from the middle of the area, began a volume at 21:09 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.

025 
WFUS55 KBOU 192105
TORBOU
COC001-123-192130-
/O.NEW.KBOU.TO.W.0036.210819T2105Z-210819T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
305 PM MDT Thu Aug 19 2021

The National Weather Service in Denver Colorado has issued a

* Tornado Warning for...
  Southwestern Weld County in northeastern Colorado...
  Northwestern Adams County in northeastern Colorado...

* Until 330 PM MDT.
    
* At 304 PM MDT, a severe thunderstorm capable of producing a tornado
  was located over Todd Creek, or 16 miles north of Denver, moving
  east at 20 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Brighton around 315 PM MDT.
  Barr Lake around 320 PM MDT.

Other locations in the path of this tornadic thunderstorm include
Fort Lupton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3990 10476 3986 10497 4000 10498 4000 10496
      4004 10496 4004 10498 4003 10497 4003 10498
      4010 10499 4012 10475
TIME...MOT...LOC 2104Z 251DEG 18KT 3996 10490 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

RPK

351 
WWUS55 KBOU 192122
SVSBOU

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

COC001-123-192132-
/O.EXP.KBOU.TO.W.0036.000000T0000Z-210819T2130Z/
Weld CO-Adams CO-
322 PM MDT Thu Aug 19 2021

...THE TORNADO WARNING FOR SOUTHWESTERN WELD AND NORTHWESTERN ADAMS
COUNTIES WILL EXPIRE AT 330 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However small hail
and heavy rain are still possible with this thunderstorm.

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

LAT...LON 3990 10476 3986 10497 4000 10498 4000 10496
      4004 10496 4004 10498 4003 10497 4003 10498
      4010 10499 4012 10475
TIME...MOT...LOC 2122Z 251DEG 18KT 3999 10479 

$$

RPK

Tornado Warnings in Colorado, 2021Every tornado warning in 2021Tornadoes in 2021

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.