Tornado Watch 327

Issued

Jun 13, 2017, 7:01 PM CDT (00:01 UTC)

Expired

Jun 14, 2017, 1:08 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Sioux Falls radar (KFSD), 61 km from the middle of the area, began a volume at 00:04 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

20%

Ten or more severe wind reports

40%

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

80%

• Mesoscale Discussion 1015Jun 13, 3:46 PM CDT
• Mesoscale Discussion 1017Jun 13, 5:43 PM CDT
• Mesoscale Discussion 1021Jun 13, 8:34 PM CDT

951 
WWUS20 KWNS 132358
SEL7  
SPC WW 132358
IAZ000-MNZ000-NEZ000-SDZ000-140700-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 327
NWS Storm Prediction Center Norman OK
700 PM CDT Tue Jun 13 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northwestern Iowa
  Central and southwestern Minnesota
  Extreme northeastern Nebraska
  Southeastern South Dakota

* Effective this Tuesday night and Wednesday morning from 700 PM
  until 200 AM CDT.

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

SUMMARY...In addition to an existing isolated supercell along the
warm front in western Minnesota, a band of thunderstorms (with
embedded supercells and potential QLCS circulations forming) will
move northeastward into the watch area over the next few hours.  The
tornado potential will be relatively maximized near that warm front,
while damaging gusts and sporadic hail are expected throughout the
convective regime.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 45 miles southeast of Yankton SD to 40
miles northeast of Alexandria MN. 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 323...WW 324...WW
325...WW 326...

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 550. Mean
storm motion vector 24035.

...Edwards

Tornado Watches in Minnesota, 2017Tornado Watches in Iowa, 2017Tornado Watches in South Dakota, 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.