Tornado Watch 660

Issued

Sep 24, 2019, 4:43 PM CDT (21:43 UTC)

Expired

Sep 24, 2019, 11:48 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Des Moines radar (KDMX), 133 km from the middle of the area, began a volume at 21:46 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

60%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 2008Sep 24, 3:13 PM CDT
• Mesoscale Discussion 2012Sep 24, 6:33 PM CDT
• Mesoscale Discussion 2013Sep 24, 6:52 PM CDT
• Mesoscale Discussion 2014Sep 24, 7:45 PM CDT
• Mesoscale Discussion 2016Sep 24, 9:01 PM CDT
• Mesoscale Discussion 2017Sep 24, 10:48 PM CDT
• Mesoscale Discussion 2018Sep 24, 11:24 PM CDT

743 
WWUS20 KWNS 242141
SEL0  
SPC WW 242141
IAZ000-MNZ000-NEZ000-WIZ000-250500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 660
NWS Storm Prediction Center Norman OK
445 PM CDT Tue Sep 24 2019

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Western and central Iowa
  Southern and east-central Minnesota
  Eastern Nebraska
  West-central Wisconsin

* Effective this Tuesday afternoon from 445 PM until Midnight
  CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered large hail and isolated very large hail events to 3
    inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 80 mph possible

SUMMARY...Several supercells are expected to develop from eastern
Nebraska and western Iowa northeast across southern Minnesota into
west-central Wisconsin this evening, capable of producing all severe
thunderstorm hazards. The greater tornado threat should exist from
northern Iowa across southern Minnesota into west-central Wisconsin.

The tornado watch area is approximately along and 80 statute miles
east and west of a line from 5 miles west of Shenandoah IA to 50
miles north northeast of Minneapolis MN. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU0).

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 659...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 26040.

...Grams

Tornado Watches in Iowa, 2019Tornado Watches in Minnesota, 2019Tornado Watches in Nebraska, 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.