Tornado Watch 501

Issued

Oct 14, 2017, 5:09 PM CDT (22:09 UTC)

Expired

Oct 15, 2017, 1:00 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Lincoln radar (KILX), 150 km from the middle of the area, began a volume at 22:11 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1712Oct 14, 2:40 PM CDT
• Mesoscale Discussion 1713Oct 14, 3:35 PM CDT
• Mesoscale Discussion 1714Oct 14, 6:01 PM CDT
• Mesoscale Discussion 1715Oct 14, 6:23 PM CDT
• Mesoscale Discussion 1716Oct 14, 7:32 PM CDT
• Mesoscale Discussion 1717Oct 14, 9:04 PM CDT

296 
WWUS20 KWNS 142206
SEL1  
SPC WW 142206
IAZ000-ILZ000-KSZ000-MOZ000-150600-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 501
NWS Storm Prediction Center Norman OK
510 PM CDT Sat Oct 14 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southeast Iowa
  Northern and western Illinois
  Far eastern Kansas
  Northern Missouri

* Effective this Saturday afternoon and Sunday morning from 510
  PM until 100 AM CDT.

* Primary threats include...
  A couple tornadoes possible
  Isolated very large hail events to 2 inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Storms will continue to intensify in multiple pre-frontal
corridors across the region. Some hail will initially be possible,
but damaging winds should be the primary risk along with some
potential for tornadoes, particularly as low-level shear steadily
strengthens this evening.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 10 miles east southeast of Marseilles
IL to 15 miles west of Olathe KS. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU1).

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 500...

AVIATION...Tornadoes and 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 24040.

...Guyer

Tornado Watches in Missouri, 2017Tornado Watches in Illinois, 2017Tornado Watches in Iowa, 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.