Tornado Watch 378

Issued

Jul 14, 2021, 2:35 PM CDT (19:35 UTC)

Expired

Jul 14, 2021, 11:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 110 km from the middle of the area, began a volume at 19:37 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

60%

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

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1281 Severe potential...watch likelyJul 14, 1:40 PM CDT
• Mesoscale Discussion 1286 Tornado watch 378Jul 14, 4:17 PM CDT
• Mesoscale Discussion 1288 Tornado watch 378Jul 14, 5:47 PM CDT
• Mesoscale Discussion 1289 Tornado watch 378Jul 14, 8:35 PM CDT

485 
WWUS20 KWNS 141933
SEL8  
SPC WW 141933
IAZ000-150200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 378
NWS Storm Prediction Center Norman OK
235 PM CDT Wed Jul 14 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Much of central and northern Iowa

* Effective this Wednesday afternoon and evening from 235 PM
  until 900 PM CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging wind gusts to 70 mph likely
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible

SUMMARY...Scattered severe thunderstorms are expected to develop
this afternoon and early evening and pose a risk for a few
tornadoes, damaging winds and large hail.  Thunderstorm coverage is
expected to increase with time with a continued risk for all severe
hazards.

The tornado watch area is approximately along and 60 statute miles
either side of a line from 25 miles west southwest of Storm Lake IA
to 10 miles south southeast of Waterloo IA. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU8).

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 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 27025.

...Bunting

Tornado Watches in Iowa, 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.