Tornado Watch 577

Issued

Aug 13, 2019, 11:49 AM MDT (17:49 UTC)

Expired

Aug 13, 2019, 7:00 PM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

70 kt

The Goodland radar (KGLD), 118 km from the middle of the area, began a volume at 17:52 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

40%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

80%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1721Aug 13, 7:56 AM MDT
• Mesoscale Discussion 1723Aug 13, 11:32 AM MDT
• Mesoscale Discussion 1727Aug 13, 2:04 PM MDT
• Mesoscale Discussion 1730Aug 13, 4:22 PM MDT

325 
WWUS20 KWNS 131744
SEL7  
SPC WW 131744
COZ000-KSZ000-NEZ000-140100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 577
NWS Storm Prediction Center Norman OK
1145 AM MDT Tue Aug 13 2019

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Eastern Colorado
  Northwest Kansas
  Southwest Nebraska

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

* Primary threats include...
  A couple tornadoes possible
  Widespread large hail and scattered very large hail events to 4
    inches in diameter likely
  Scattered damaging winds and isolated significant gusts to 80
    mph likely

SUMMARY...Multiple discrete supercells will pose a risk for
potentially giant hail and a couple tornadoes through this
afternoon. This activity should eventually grow upscale into a
south-southeast moving cluster with an increasing risk for severe
wind gusts towards early evening.

The tornado watch area is approximately along and 70 statute miles
east and west of a line from 50 miles northeast of Sidney NE to 50
miles south southeast of Goodland KS. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 576...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 4 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 34035.

...Grams

Tornado Watches in Kansas, 2019Tornado Watches in Nebraska, 2019Tornado Watches in Colorado, 2019Every tornado watch in 2019

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.