Tornado Watch 585

Issued

Jul 2, 2011, 2:13 PM MDT (20:13 UTC)

Expired

Jul 2, 2011, 10:00 PM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Rapid City radar (KUDX), 214 km from the middle of the area, began a volume at 20:14 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

70%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1470Jul 2, 12:17 PM MDT
• Mesoscale Discussion 1473Jul 2, 4:59 PM MDT
• Mesoscale Discussion 1476Jul 2, 6:48 PM MDT

561 
WWUS20 KWNS 022013
SEL5
SPC WW 022013
MTZ000-NDZ000-NEZ000-SDZ000-WYZ000-030400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 585
NWS STORM PREDICTION CENTER NORMAN OK
215 PM MDT SAT JUL 2 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

       SOUTHEAST MONTANA
       SOUTHWEST NORTH DAKOTA
       WESTERN NEBRASKA
       WESTERN SOUTH DAKOTA
       EASTERN WYOMING

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 215 PM UNTIL
1000 PM MDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF
MILES CITY MONTANA TO 40 MILES WEST OF SIDNEY NEBRASKA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU5).

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 583...WW 584...

DISCUSSION...SCATTERED THUNDERSTORMS ARE BEGINNING TO FORM OVER
EASTERN WY.  THIS ACTIVITY WILL SPREAD EASTWARD ACROSS THE WATCH
AREA THROUGH THE EVENING.  SOUTHEASTERLY AND INCREASING LOW LEVEL
WINDS...COUPLED WITH SUFFICIENT WESTERLY FLOW ALOFT...WILL PROMOTE
SUPERCELL STORMS CAPABLE OF LARGE HAIL AND DAMAGING WINDS.
STRENGTHENING WIND FIELDS BY 00Z ALSO SUGGEST A RISK OF A FEW
TORNADOES.

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 26030.


...HART

Tornado Watches in South Dakota, 2011Tornado Watches in Wyoming, 2011Tornado Watches in Nebraska, 2011Every tornado watch in 2011

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.