Severe Thunderstorm Watch 112

Issued

Apr 27, 2021, 11:45 AM MDT (17:45 UTC)

Expired

Apr 27, 2021, 7:00 PM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Counties Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Douglas County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO

The Denver radar (KFTG), 84 km from the middle of the area, began a volume at 17:48 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.

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 434 Severe potential...watch likelyApr 27, 11:15 AM MDT
• Mesoscale Discussion 437 Severe thunderstorm watch 112Apr 27, 2:32 PM MDT
• Mesoscale Discussion 438 Severe thunderstorm watch 112Apr 27, 4:24 PM MDT
• Mesoscale Discussion 440 Severe thunderstorm watch 112...114Apr 27, 6:16 PM MDT

685 
WWUS20 KWNS 271740
SEL2  
SPC WW 271740
COZ000-280100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 112
NWS Storm Prediction Center Norman OK
1145 AM MDT Tue Apr 27 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northeast Colorado

* Effective this Tuesday morning and evening from 1145 AM until
  700 PM MDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms will increase in coverage and intensity
through the afternoon, with the strongest cells capable of large
hail.  An isolated tornado or two is also possible.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 65 miles northwest of
Limon CO to 45 miles north of Burlington CO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.

...Hart

Severe Thunderstorm Watches in Colorado, 2021Every severe thunderstorm watch 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.