Severe Thunderstorm Warning 137, NWS Denver/Boulder, CO

Issued

Aug 19, 2021, 4:04 PM MDT (22:04 UTC)

Expired

Aug 19, 2021, 4:45 PM MDT

In force

41 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Tornado

Possible

Hail

1.5 in

Wind

60.0 mph

Counties Arapahoe County, CO, Elbert County, CO

The Denver radar (KFTG), 26 km from the middle of the area, began a volume at 22:05 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.

680 
WUUS55 KBOU 192204
SVRBOU
COC005-039-192245-
/O.NEW.KBOU.SV.W.0137.210819T2204Z-210819T2245Z/

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

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  Northwestern Elbert County in east central Colorado...
  Central Arapahoe County in northeastern Colorado...

* Until 445 PM MDT.

* At 404 PM MDT, a severe thunderstorm was located 10 miles southeast
  of Arapahoe Park, or 25 miles southeast of Denver, moving northeast
  at 20 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
  northwestern Elbert and central Arapahoe Counties.

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 3945 10455 3963 10465 3973 10435 3953 10424
TIME...MOT...LOC 2204Z 245DEG 15KT 3956 10451 

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

$$

RPK

655 
WWUS55 KBOU 192240
SVSBOU

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

COC005-039-192250-
/O.EXP.KBOU.SV.W.0137.000000T0000Z-210819T2245Z/
Elbert CO-Arapahoe CO-
440 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ELBERT AND
CENTRAL ARAPAHOE COUNTIES WILL EXPIRE AT 445 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.

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

LAT...LON 3945 10455 3963 10465 3973 10435 3953 10424
TIME...MOT...LOC 2240Z 245DEG 15KT 3962 10434 

$$

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.