Tornado Watch 305

Issued

Jun 16, 2014, 5:37 PM CDT (22:37 UTC)

Expired

Jun 17, 2014, 12:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 140 km from the middle of the area, began a volume at 22:39 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

80%

One or more EF2 to EF5 tornadoes

60%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1017Jun 16, 3:11 PM CDT
• Mesoscale Discussion 1021Jun 16, 5:10 PM CDT
• Mesoscale Discussion 1029Jun 16, 9:11 PM CDT
• Mesoscale Discussion 1030Jun 16, 11:11 PM CDT

766 
WWUS20 KWNS 162236
SEL5  
SPC WW 162236
IAZ000-SDZ000-170500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 305
NWS STORM PREDICTION CENTER NORMAN OK
535 PM CDT MON JUN 16 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHWEST INTO CENTRAL IOWA
  EXTREME SOUTHEAST SOUTH DAKOTA

* EFFECTIVE THIS MONDAY AFTERNOON FROM 535 PM UNTIL MIDNIGHT CDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL TORNADOES AND A COUPLE INTENSE TORNADOES LIKELY
  WIDESPREAD DAMAGING WIND GUSTS TO 70 MPH LIKELY
  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
    TO 2.5 INCHES IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTH OF TEKAMAH
NEBRASKA TO 50 MILES SOUTH SOUTHEAST OF MASON CITY IOWA.  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 302...WW 303...WW 304...

DISCUSSION...SUPERCELLS WILL MOVE ENEWD FROM NE NEB INTO NW
IA...WHILE OTHER STORMS CONGEAL INTO A BOWING MCS ACROSS NRN IA. 
TORNADOES...SOME STRONG...WILL BE POSSIBLE WITH THE MORE DISCRETE
STORMS THIS EVENING...WHILE WIDESPREAD DAMAGING WINDS WILL BECOME A
GREATER RISK AS THE CONVECTION GROWS UPSCALE.

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 27035.


...THOMPSON

Tornado Watches in Iowa, 2014Every tornado watch in 2014

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.