Severe Thunderstorm Warning 133, NWS Denver/Boulder, CO

Issued

Aug 19, 2021, 3:42 PM MDT (21:42 UTC)

Expired

Aug 19, 2021, 4:15 PM MDT

In force

33 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Tornado

Possible

Damage threat

Considerable

Hail

2.5 in

Wind

60.0 mph

County Weld County, CO

The Denver radar (KFTG), 50 km from the middle of the area, began a volume at 21:45 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.

071 
WUUS55 KBOU 192142
SVRBOU
COC123-192215-
/O.NEW.KBOU.SV.W.0133.210819T2142Z-210819T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
342 PM MDT Thu Aug 19 2021

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  South central Weld County in northeastern Colorado...

* Until 415 PM MDT.

* At 341 PM MDT, a severe thunderstorm was located 4 miles east of
  Roggen, or 26 miles west of Fort Morgan, moving northeast at 25
  mph.

  HAZARD...Tennis 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
  south central Weld County, including the following locations...
  Masters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4009 10415 4006 10441 4030 10443 4035 10415
TIME...MOT...LOC 2141Z 243DEG 21KT 4018 10429 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RPK

899 
WWUS55 KBOU 192214
SVSBOU

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

COC123-192223-
/O.EXP.KBOU.SV.W.0133.000000T0000Z-210819T2215Z/
Weld CO-
414 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WELD COUNTY WILL
EXPIRE AT 415 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small
hail, gusty winds 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 4009 10415 4006 10441 4030 10443 4035 10415
TIME...MOT...LOC 2213Z 243DEG 21KT 4027 10407 

$$

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.