Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 397
NWS STORM PREDICTION CENTER NORMAN OK
155 PM MDT SAT JUN 13 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
A LARGE PORTION OF EASTERN COLORADO
MUCH OF NEBRASKA PANHANDLE
PARTS OF EASTERN WYOMING
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 155 PM UNTIL
900 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF DOUGLAS
WYOMING TO 50 MILES SOUTH OF LIMON COLORADO. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU7).
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.
DISCUSSION...WITH APPROACH OF S/WV TROUGH FROM UT/WRN CO...SHEAR
PROFILES AND INSTABILITY ARE BECOMING FAVORABLE FOR DEVELOPMENT OF
SEVERE THUNDERSTORMS...PRIMARILY EAST OF MOUNTAINS. WITH MLCAPES
AOA 1200 J/KG AND 40KT OF SHEAR...SUPERCELLS ARE ILKLEY WITH
POTENTIAL FOR LARGE HAIL AND TORNADOES. ACTIVITY WILL GRADUALLY
DEVELOP EWD ACROSS THE WATCH INTO THE MORE FAVORABLE LOW LEVEL
SHEAR/INSTABILITY ENVIRONMENT.
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 24025.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 397 TORNADO CO NE WY 131955Z - 140300Z
AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
50N DGW/DOUGLAS WY/ - 50S LIC/LIMON CO/
..AVIATION COORDS.. 70NM E/W /46ENE DDY - 39ENE PUB/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24025.
LAT...LON 43450376 38540219 38540515 43450697
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 397 Status Report Messages:
STATUS REPORT #3 ON WW 397
VALID 140120Z - 140240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WNW COS
TO 15 ENE DEN TO 25 NE FCL TO 35 WNW LAR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1101.
..GRAMS..06/14/09
ATTN...WFO...BOU...PUB...CYS...RIW...
&&
STATUS REPORT FOR WT 397
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC005-035-039-041-073-075-087-119-121-123-140240-
CO
. COLORADO COUNTIES INCLUDED ARE
ARAPAHOE DOUGLAS ELBERT
EL PASO LINCOLN LOGAN
MORGAN TELLER WASHINGTON
WELD
$$
NEC007-013-033-045-105-123-157-165-140240-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
DAWES KIMBALL MORRILL
SCOTTS BLUFF SIOUX
$$
WYC001-009-015-021-025-027-031-140240-
WY
. WYOMING COUNTIES INCLUDED ARE
ALBANY CONVERSE GOSHEN
LARAMIE NATRONA NIOBRARA
PLATTE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 397
VALID 132335Z - 140040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GRAMS..06/13/09
ATTN...WFO...BOU...PUB...CYS...RIW...
&&
STATUS REPORT FOR WT 397
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC001-005-013-014-031-035-039-041-059-069-073-075-087-119-121-
123-140040-
CO
. COLORADO COUNTIES INCLUDED ARE
ADAMS ARAPAHOE BOULDER
BROOMFIELD DENVER DOUGLAS
ELBERT EL PASO JEFFERSON
LARIMER LINCOLN LOGAN
MORGAN TELLER WASHINGTON
WELD
$$
NEC007-013-033-105-123-157-165-140040-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
KIMBALL MORRILL SCOTTS BLUFF
SIOUX
$$
WYC001-009-015-021-025-027-031-140040-
WY
. WYOMING COUNTIES INCLUDED ARE
ALBANY CONVERSE GOSHEN
LARAMIE NATRONA NIOBRARA
PLATTE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 397
VALID 132245Z - 132340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GUYER..06/13/09
ATTN...WFO...BOU...PUB...CYS...RIW...
&&
STATUS REPORT FOR WT 397
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC001-005-013-014-031-035-039-041-059-069-073-075-087-119-121-
123-132340-
CO
. COLORADO COUNTIES INCLUDED ARE
ADAMS ARAPAHOE BOULDER
BROOMFIELD DENVER DOUGLAS
ELBERT EL PASO JEFFERSON
LARIMER LINCOLN LOGAN
MORGAN TELLER WASHINGTON
WELD
$$
NEC007-013-033-105-123-157-165-132340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER BOX BUTTE CHEYENNE
KIMBALL MORRILL SCOTTS BLUFF
SIOUX
$$
WYC001-009-015-021-025-027-031-132340-
WY
. WYOMING COUNTIES INCLUDED ARE
ALBANY CONVERSE GOSHEN
LARAMIE NATRONA NIOBRARA
PLATTE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (60%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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.