Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 170
NWS STORM PREDICTION CENTER NORMAN OK
730 PM CDT MON APR 7 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN OKLAHOMA
EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 730 PM UNTIL
300 AM CDT.
HAIL TO 2.5 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 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTH OF
CLINTON OKLAHOMA TO 65 MILES EAST NORTHEAST OF TULSA OKLAHOMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).
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 169...
DISCUSSION...SEVERE THUNDERSTORMS...INCLUDING SUPERCELLS...WILL
CONTINUE INCREASING IN COVERAGE ACROSS NRN AND NERN OK TONIGHT.
THIS WILL OCCUR AS SSWLY LLJ INTENSIFIES AND FUELS STRONG LOW LEVEL
WAA ALONG AND NORTH OF SURFACE FRONT NOW EXTENDING FROM NERN INTO
W-CENTRAL OK. STRONG SHEAR AND STEEP LAPSE RATES WILL COMPENSATE
FOR MODEST MUCAPE AND SUPPORT STORMS CAPABLE OF LARGE HAIL...SOME OF
WHICH COULD BE QUITE LARGE...AS ACTIVITY EVOLVES INTO A LARGER
CLUSTER/MCS AFTER DARK. ISOLATED DAMAGING WINDS AND EVEN A BRIEF
TORNADO WILL ALSO BE POSSIBLE WITH STORMS NEAR THE SURFACE FRONT
INTO THE MID/LATE EVENING.
AVIATION...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 500. MEAN STORM
MOTION VECTOR 24035.
...EVANS
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 170 SEVERE TSTM OK 080030Z - 080800Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
40N CSM/CLINTON OK/ - 65ENE TUL/TULSA OK/
..AVIATION COORDS.. 40NM N/S /42SE GAG - 38WNW RZC/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24035.
LAT...LON 36569919 37209480 35909480 35259919
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 170 Status Report Messages:
STATUS REPORT #4 ON WW 170
VALID 080445Z - 080540Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..04/08/08
ATTN...WFO...TSA...OUN...
&&
STATUS REPORT FOR WS 170
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
OKC011-017-021-035-037-039-041-043-047-071-073-081-083-093-097-
101-103-105-107-109-111-113-115-117-119-131-143-145-147-
080540-
OK
. OKLAHOMA COUNTIES INCLUDED ARE
BLAINE CANADIAN CHEROKEE
CRAIG CREEK CUSTER
DELAWARE DEWEY GARFIELD
KAY KINGFISHER LINCOLN
LOGAN MAJOR MAYES
MUSKOGEE NOBLE NOWATA
OKFUSKEE OKLAHOMA OKMULGEE
OSAGE OTTAWA PAWNEE
PAYNE ROGERS TULSA
WAGONER WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 170
VALID 080325Z - 080440Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..04/08/08
ATTN...WFO...TSA...OUN...
&&
STATUS REPORT FOR WS 170
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
OKC021-035-037-041-043-047-071-093-097-101-103-105-107-111-113-
115-117-119-131-143-145-147-080440-
OK
. OKLAHOMA COUNTIES INCLUDED ARE
CHEROKEE CRAIG CREEK
DELAWARE DEWEY GARFIELD
KAY MAJOR MAYES
MUSKOGEE NOBLE NOWATA
OKFUSKEE OKMULGEE OSAGE
OTTAWA PAWNEE PAYNE
ROGERS TULSA WAGONER
WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 170
VALID 080240Z - 080340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..04/08/08
ATTN...WFO...TSA...OUN...
&&
STATUS REPORT FOR WS 170
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
OKC021-035-037-041-043-047-071-093-097-101-103-105-107-111-113-
115-117-119-131-143-145-147-080340-
OK
. OKLAHOMA COUNTIES INCLUDED ARE
CHEROKEE CRAIG CREEK
DELAWARE DEWEY GARFIELD
KAY MAJOR MAYES
MUSKOGEE NOBLE NOWATA
OKFUSKEE OKMULGEE OSAGE
OTTAWA PAWNEE PAYNE
ROGERS TULSA WAGONER
WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 170
VALID 080125Z - 080240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..04/08/08
ATTN...WFO...TSA...OUN...
&&
STATUS REPORT FOR WS 170
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
OKC021-035-037-041-043-047-071-093-097-101-103-105-107-111-113-
115-117-119-131-143-145-147-080240-
OK
. OKLAHOMA COUNTIES INCLUDED ARE
CHEROKEE CRAIG CREEK
DELAWARE DEWEY GARFIELD
KAY MAJOR MAYES
MUSKOGEE NOBLE NOWATA
OKFUSKEE OKMULGEE OSAGE
OTTAWA PAWNEE PAYNE
ROGERS TULSA WAGONER
WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (10%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
High (70%)
|
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.