Tornado Watch 66

Issued

Mar 6, 2017, 8:52 PM CST (02:52 UTC)

Expired

Mar 7, 2017, 2:41 AM CST

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Lincoln radar (KILX), 138 km from the middle of the area, began a volume at 02:56 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

30%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 263Mar 6, 7:42 PM CST
• Mesoscale Discussion 264Mar 6, 8:10 PM CST
• Mesoscale Discussion 265Mar 6, 8:22 PM CST
• Mesoscale Discussion 267Mar 6, 10:15 PM CST
• Mesoscale Discussion 268Mar 6, 11:13 PM CST

716 
WWUS20 KWNS 070246
SEL6  
SPC WW 070246
IAZ000-ILZ000-MOZ000-071000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 66
NWS Storm Prediction Center Norman OK
850 PM CST Mon Mar 6 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Eastern Iowa
  Western Illinois
  Eastern Missouri

* Effective this Monday night and Tuesday morning from 850 PM
  until 400 AM CST.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging winds and isolated significant gusts to 75
    mph possible

SUMMARY...A fast-moving squall line will further accelerate
east-northeastward through the late evening and overnight hours,
posing a damaging wind and tornado risk across eastern portions of
Iowa and Missouri into western Illinois.

The tornado watch area is approximately along and 55 statute miles
east and west of a line from 15 miles east northeast of Dubuque IA
to 55 miles southwest of Farmington MO. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU6).

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 61...WW 62...WW 63...WW
64...WW 65...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24050.

...Guyer

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