Tornado Watch 375

Issued

Jun 28, 2017, 2:53 PM CDT (19:53 UTC)

Expired

Jun 29, 2017, 12:00 AM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 37 km from the middle of the area, began a volume at 19:52 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1169Jun 28, 2:14 PM CDT
• Mesoscale Discussion 1174Jun 28, 5:29 PM CDT
• Mesoscale Discussion 1175Jun 28, 5:46 PM CDT
• Mesoscale Discussion 1178Jun 28, 7:53 PM CDT
• Mesoscale Discussion 1179Jun 28, 8:39 PM CDT

011 
WWUS20 KWNS 281952
SEL5  
SPC WW 281952
IAZ000-ILZ000-MOZ000-NEZ000-WIZ000-290300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 375
NWS Storm Prediction Center Norman OK
255 PM CDT Wed Jun 28 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Iowa
  Northwest Illinois
  Northern Missouri
  Southeast Nebraska
  Southwest Wisconsin

* Effective this Wednesday afternoon and evening from 255 PM
  until 1000 PM CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...In the wake of early-day storms, strong to severe
thunderstorm development should continue to occur with a steadily
moistening and destabilizing air mass. While large hail and damaging
winds should be the most common hazards, relatively strong low-level
shear and the influence of subtle residual boundaries could yield a
few tornadoes through the mid/late afternoon hours into this
evening.

The tornado watch area is approximately along and 105 statute miles
east and west of a line from 40 miles northeast of Waterloo IA to 40
miles southwest of Lamoni IA. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU5).

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.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 27030.

...Guyer

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