Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 768
NWS STORM PREDICTION CENTER NORMAN OK
730 PM CDT MON JUL 28 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL NORTH DAKOTA
EFFECTIVE THIS MONDAY NIGHT FROM 730 PM UNTIL MIDNIGHT CDT.
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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF BISMARCK
NORTH DAKOTA TO 30 MILES EAST SOUTHEAST OF JAMESTOWN NORTH
DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
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 767...
DISCUSSION...THUNDERSTORMS HAVE BEGUN TO RAPIDLY INTENSIFY OVER
CENTRAL ND AHEAD OF APPROACHING SHORTWAVE TROUGH. EXTREME
INSTABILITY AND FAVORABLE EFFECTIVE SHEAR VALUES WILL PROMOTE
SUPERCELL STORMS CAPABLE OF LARGE HAIL AND DAMAGING WINDS. INITIAL
STORMS MAY ALSO POSE A THREAT OF ISOLATED TORNADOES DUE TO BACKED
SURFACE WINDS AND DEGREE OF CAPE.
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
600. MEAN STORM MOTION VECTOR 30025.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 768 TORNADO ND 290030Z - 290500Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
55W BIS/BISMARCK ND/ - 30ESE JMS/JAMESTOWN ND/
..AVIATION COORDS.. 50NM N/S /36E DIK - 51W FAR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 30025.
LAT...LON 47630191 47639808 45889808 45900191
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 768 Status Report Messages:
STATUS REPORT #1 ON WW 768
VALID 290340Z - 290440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNW MBG
TO 25 NNW BIS TO 35 ENE N60.
..DIAL..07/29/08
ATTN...WFO...BIS...
&&
STATUS REPORT FOR WT 768
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC015-021-029-043-045-047-051-083-093-290440-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BURLEIGH DICKEY EMMONS
KIDDER LAMOURE LOGAN
MCINTOSH SHERIDAN STUTSMAN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (40%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (40%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (60%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (40%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (90%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
