Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 329
NWS STORM PREDICTION CENTER NORMAN OK
210 PM MDT THU JUN 4 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWESTERN IDAHO
EASTERN OREGON
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
900 PM MDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES NORTH OF
REDMOND OREGON TO 60 MILES EAST SOUTHEAST OF BOISE IDAHO. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 327...WW 328...
DISCUSSION...STORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSIFY THROUGH THE AFTERNOON AS AIR MASS CONTINUES TO WARM AND
DESTABILIZE. MODERATE INSTABILITY AND DEEP LAYER SHEAR AT 40-50 KT
WILL BE SUPPORTIVE OF SUPERCELLS. SEVERE HAIL IS EXPECTED TO BE THE
PRIMARY THREAT...THOUGH STEEP LOW LEVEL LAPSE RATES WILL ALSO
SUPPORT DAMAGING WINDS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 15030.
...IMY
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 329 SEVERE TSTM ID OR 042010Z - 050300Z
AXIS..95 STATUTE MILES EITHER SIDE OF LINE..
45N RDM/REDMOND OR/ - 60ESE BOI/BOISE ID/
..AVIATION COORDS.. 85NM EITHER SIDE /40N DSD - 50ESE BOI/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 15030.
LAT...LON 46222062 44561461 41901561 43562165
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 329 Status Report Messages:
STATUS REPORT #4 ON WW 329
VALID 050130Z - 050240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..06/05/09
ATTN...WFO...BOI...PDT...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IDC001-003-015-025-027-039-045-047-053-073-075-083-085-087-
050240-
ID
. IDAHO COUNTIES INCLUDED ARE
ADA ADAMS BOISE
CAMAS CANYON ELMORE
GEM GOODING JEROME
OWYHEE PAYETTE TWIN FALLS
VALLEY WASHINGTON
$$
ORC001-021-023-025-031-045-049-059-061-063-069-050240-
OR
. OREGON COUNTIES INCLUDED ARE
BAKER GILLIAM GRANT
HARNEY JEFFERSON MALHEUR
MORROW UMATILLA UNION
WALLOWA WHEELER
$$
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.
$$
STATUS REPORT #3 ON WW 329
VALID 050035Z - 050140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..06/05/09
ATTN...WFO...BOI...PDT...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IDC001-003-015-025-027-039-045-047-053-073-075-083-085-087-
050140-
ID
. IDAHO COUNTIES INCLUDED ARE
ADA ADAMS BOISE
CAMAS CANYON ELMORE
GEM GOODING JEROME
OWYHEE PAYETTE TWIN FALLS
VALLEY WASHINGTON
$$
ORC001-013-017-021-023-025-031-045-049-059-061-063-069-050140-
OR
. OREGON COUNTIES INCLUDED ARE
BAKER CROOK DESCHUTES
GILLIAM GRANT HARNEY
JEFFERSON MALHEUR MORROW
UMATILLA UNION WALLOWA
WHEELER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 329
VALID 042335Z - 050040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..06/04/09
ATTN...WFO...BOI...PDT...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IDC001-003-015-025-027-039-045-047-053-073-075-083-085-087-
050040-
ID
. IDAHO COUNTIES INCLUDED ARE
ADA ADAMS BOISE
CAMAS CANYON ELMORE
GEM GOODING JEROME
OWYHEE PAYETTE TWIN FALLS
VALLEY WASHINGTON
$$
ORC001-013-017-021-023-025-031-045-049-059-061-063-069-050040-
OR
. OREGON COUNTIES INCLUDED ARE
BAKER CROOK DESCHUTES
GILLIAM GRANT HARNEY
JEFFERSON MALHEUR MORROW
UMATILLA UNION WALLOWA
WHEELER
$$
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.
$$
STATUS REPORT #1 ON WW 329
VALID 042130Z - 042240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..06/04/09
ATTN...WFO...BOI...PDT...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IDC001-003-015-025-027-039-045-047-053-073-075-083-085-087-
042240-
ID
. IDAHO COUNTIES INCLUDED ARE
ADA ADAMS BOISE
CAMAS CANYON ELMORE
GEM GOODING JEROME
OWYHEE PAYETTE TWIN FALLS
VALLEY WASHINGTON
$$
ORC001-013-017-021-023-025-031-045-049-059-061-063-069-042240-
OR
. OREGON COUNTIES INCLUDED ARE
BAKER CROOK DESCHUTES
GILLIAM GRANT HARNEY
JEFFERSON MALHEUR MORROW
UMATILLA UNION WALLOWA
WHEELER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
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.