Tornado Watch 204

Issued

May 10, 2017, 2:43 PM CDT (19:43 UTC)

Expired

May 10, 2017, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Altus AFB radar (KFDR), 122 km from the middle of the area, began a volume at 19:46 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 684May 10, 2:14 PM CDT
• Mesoscale Discussion 689May 10, 5:58 PM CDT

544 
WWUS20 KWNS 101941
SEL4  
SPC WW 101941
OKZ000-TXZ000-110300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 204
NWS Storm Prediction Center Norman OK
245 PM CDT Wed May 10 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southwest Oklahoma
  Northwest Texas

* Effective this Wednesday afternoon and evening from 245 PM
  until 1000 PM CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered large hail and isolated very large hail events to 3
    inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Severe thunderstorms will continue to develop and increase
this afternoon, initially near the intersection of the dryline and a
modifying outflow boundary that extends northeastward into southwest
Oklahoma. Very large hail will be the primary risk, but damaging
winds are also possible, and a tornado risk exists especially later
today and/or near the modifying outflow boundary.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 85 miles west southwest of Childress
TX to 20 miles south southeast of Fort Sill OK. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).

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 203...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24025.

...Guyer

Tornado Watches in Texas, 2017Tornado Watches in Oklahoma, 2017Every tornado watch in 2017

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.