Tornado Watch 285

Issued

Jun 11, 2015, 1:53 PM CDT (18:53 UTC)

Expired

Jun 11, 2015, 9:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Omaha radar (KOAX), 100 km from the middle of the area, began a volume at 18:53 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

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 969Jun 11, 1:01 PM CDT
• Mesoscale Discussion 975Jun 11, 4:47 PM CDT
• Mesoscale Discussion 977Jun 11, 5:48 PM CDT

560 
WWUS20 KWNS 111851
SEL5  
SPC WW 111851
IAZ000-MOZ000-NEZ000-120200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 285
NWS STORM PREDICTION CENTER NORMAN OK
155 PM CDT THU JUN 11 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHWEST IOWA
  NORTHWEST MISSOURI
  SOUTHEAST NEBRASKA

* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 155 PM UNTIL
  900 PM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
    INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...SUPERCELL THUNDERSTORMS ARE EXPECTED TO FORM OVER
SOUTHEAST NEB AND TRACK EASTWARD ACROSS THE WATCH AREA THIS
AFTERNOON.  LARGE HAIL AND DAMAGING WINDS ARE THE MAIN THREATS. 
HOWEVER...AN ISOLATED STORM OR TWO COULD PRODUCE TORNADOES.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 70 MILES NORTHEAST OF
SHENANDOAH IOWA TO 25 MILES WEST SOUTHWEST OF FALLS CITY
NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 284...

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 27035.


...HART

Tornado Watches in Iowa, 2015Tornado Watches in Missouri, 2015Tornado Watches in Nebraska, 2015Every tornado watch in 2015

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.