Tornado Watch 379

Issued

Jul 14, 2021, 6:13 PM CDT (23:13 UTC)

Expired

Jul 15, 2021, 12:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The La Crosse radar (KARX), 118 km from the middle of the area, began a volume at 23:15 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

10%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1287 Severe potential...watch likelyJul 14, 5:42 PM CDT
• Mesoscale Discussion 1289 Tornado watch 378Jul 14, 8:35 PM CDT
• Mesoscale Discussion 1290 Tornado watch 379Jul 14, 9:15 PM CDT
• Mesoscale Discussion 1291 Tornado watch 379Jul 14, 11:17 PM CDT

002 
WWUS20 KWNS 142311
SEL9  
SPC WW 142311
IAZ000-ILZ000-WIZ000-150500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 379
NWS Storm Prediction Center Norman OK
610 PM CDT Wed Jul 14 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Eastern Iowa
  Northwest Illinois
  Southern Wisconsin

* Effective this Wednesday night from 610 PM until Midnight CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...Several supercells ongoing across east-central/northeast
Iowa will continue eastward in vicinity of a warm front and
recovering air mass from storms earlier today. As low-level winds
further strengthen, tornadoes will remain a possibility and damaging
wind potential may somewhat increase as storms tend to cluster this
evening. Isolated large hail is also possible.

The tornado watch area is approximately along and 60 statute miles
north and south of a line from 50 miles north of Cedar Rapids IA to
10 miles north of Janesville WI. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU9).

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 378...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 27035.

...Guyer

Tornado Watches in Iowa, 2021Tornado Watches in Wisconsin, 2021Tornado Watches in Illinois, 2021Every tornado watch in 2021

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.