Tornado Watch 319

Issued

Jun 20, 2015, 3:49 PM CDT (20:49 UTC)

Expired

Jun 20, 2015, 11:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Des Moines radar (KDMX), 112 km from the middle of the area, began a volume at 20:50 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1084Jun 20, 12:48 PM CDT
• Mesoscale Discussion 1087Jun 20, 3:10 PM CDT
• Mesoscale Discussion 1091Jun 20, 6:33 PM CDT
• Mesoscale Discussion 1095Jun 20, 10:12 PM CDT

968 
WWUS20 KWNS 202046
SEL9  
SPC WW 202046
IAZ000-ILZ000-MOZ000-210400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 319
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT SAT JUN 20 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHERN AND EASTERN IOWA
  WESTERN AND NORTHWEST ILLINOIS
  NORTHERN MISSOURI

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
  1100 PM CDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3
    INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...AT LEAST WIDELY SCATTERED SEVERE THUNDERSTORMS ARE
EXPECTED TO DEVELOP AND INCREASE THROUGH LATE AFTERNOON AND EVENING
ACROSS THE REGION AHEAD OF A COLD FRONT AND NEAR AN OUTFLOW BOUNDARY
ACROSS IOWA. INITIALLY DISCRETE STORMS/SUPERCELLS SHOULD MERGE INTO
A SOUTHEASTWARD-MOVING CONVECTIVE SYSTEM LATER THIS EVENING.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST SOUTHWEST OF
DES MOINES IOWA TO 70 MILES EAST SOUTHEAST OF BURLINGTON IOWA. 
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 317...WW 318...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 28025.


...GUYER

Tornado Watches in Iowa, 2015Tornado Watches in Illinois, 2015Tornado Watches in Missouri, 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.