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Powerful Winter Storms on US West Coast & North of Hawaii
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brunota2003
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Re: Powerful Winter Storm near US West Coast
TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN FEB 24 2008
TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W.
BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1545 UTC.
...ITCZ...
ITCZ AXIS ALONG 7N78W 5N105W 7N120W 4N140W. SCATTERED MODERATE
CONVECTION WITHIN 90-120 NM N OF AXIS BETWEEN 116W AND 121W.
SCATTERED MODERATE WITHIN 45 NM OF 10N109.5W.
...DISCUSSION...
BROAD FLAT MID TO UPPER LEVEL TROUGH COVERS THE AREA N OF 23N
WITH MODERATE WLY WINDS AT THE UPPER LEVELS ADVECTING SOME
MOISTURE. THIS TROUGH ONCE SUPPORTED A WEAKENING 988 MB SURFACE
LOW WITH NOW GALE FORCE WINDS APPROACHING THE N CALIFORNIA COAST
NEAR 40N127W. AN ASSOCIATED COLD FRONTAL BOUNDARY ENTERS THE
DISCUSSION AREA NEAR 32N120W AND EXTENDS TO 21N140W. AS THE SFC
LOW CONTINUES TO LIFT N OF THE AREA WINDS HAVE DROPPED OFF
SIGNIFICANTLY AND ARE ONLY AROUND 20 KT N OF 29N PER A 0620 UTC
ASCAT PASS. A SUBSEQUENT 0840 UTC JASON ALTIMETER PASS INDICATED
SEAS OF UP TO 28 FT ALONG 30N. THESE SWELLS SHOULD CONTINUE TO
PROPAGATE SOUTHEASTWARD IN THE NEXT TWO DAYS...BUT DIMINISHING
IN AMPLITUDE. THE FRONT SHOULD BECOME STATIONARY AND DISSIPATE
IN ABOUT 24 HOURS. A 1021 MB SURFACE HIGH NEAR 26N137W SHOULD
MOVE NE OF THE AREA WITHIN 24 HOURS.
A FAIRLY EXTENSIVE MAINLY UPPER LEVEL CYCLONIC CIRCULATION
CENTER NEAR 11N131W DOMINATED THE FLOW REGIME OVER THE DEEP
TROPICS W OF 105W. MODERATE UPPER LEVEL DIFFLUENT SWLY FLOW
S OF 18N BETWEEN 110W AND 130W WAS AIDING IN FIRING UP SCATTERED
MODERATE CONVECTION ALONG AND WITHIN 120 NM N OF THE ITCZ
BETWEEN 126W AND 131W. MOST OF THE CONVECTIVE ACTIVITY WAS
OCCURRING TO THE W OF THE SURFACE TROUGH NOTED WITHIN THE ITCZ
ALONG 116W. HOWEVER AS THE SURFACE TROUGH MOVES WWD OVER THE
NEXT 24-48 HOURS...CONVECTION MAY INCREASE ALONG THE TROUGH
WITHIN THE CORE AREA OF DIFFLUENT FLOW. THE WEAK LOW PRESSURE
AREA NOTED EARLIER NEAR 6N115W HAS FALLEN IN A GAP IN THE 1306
UTC QUIKSCAT PASS AND IT IS QUESTIONABLE FOR NOW WHETHER THIS
FEATURE STILL EXISTS.
Areas dealing specifically with the low highlighted.
EDIT: Wasnt paying attention to what all I highlighted.
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN FEB 24 2008
TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W.
BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1545 UTC.
...ITCZ...
ITCZ AXIS ALONG 7N78W 5N105W 7N120W 4N140W. SCATTERED MODERATE
CONVECTION WITHIN 90-120 NM N OF AXIS BETWEEN 116W AND 121W.
SCATTERED MODERATE WITHIN 45 NM OF 10N109.5W.
...DISCUSSION...
BROAD FLAT MID TO UPPER LEVEL TROUGH COVERS THE AREA N OF 23N
WITH MODERATE WLY WINDS AT THE UPPER LEVELS ADVECTING SOME
MOISTURE. THIS TROUGH ONCE SUPPORTED A WEAKENING 988 MB SURFACE
LOW WITH NOW GALE FORCE WINDS APPROACHING THE N CALIFORNIA COAST
NEAR 40N127W. AN ASSOCIATED COLD FRONTAL BOUNDARY ENTERS THE
DISCUSSION AREA NEAR 32N120W AND EXTENDS TO 21N140W. AS THE SFC
LOW CONTINUES TO LIFT N OF THE AREA WINDS HAVE DROPPED OFF
SIGNIFICANTLY AND ARE ONLY AROUND 20 KT N OF 29N PER A 0620 UTC
ASCAT PASS. A SUBSEQUENT 0840 UTC JASON ALTIMETER PASS INDICATED
SEAS OF UP TO 28 FT ALONG 30N. THESE SWELLS SHOULD CONTINUE TO
PROPAGATE SOUTHEASTWARD IN THE NEXT TWO DAYS...BUT DIMINISHING
IN AMPLITUDE. THE FRONT SHOULD BECOME STATIONARY AND DISSIPATE
IN ABOUT 24 HOURS. A 1021 MB SURFACE HIGH NEAR 26N137W SHOULD
MOVE NE OF THE AREA WITHIN 24 HOURS.
A FAIRLY EXTENSIVE MAINLY UPPER LEVEL CYCLONIC CIRCULATION
CENTER NEAR 11N131W DOMINATED THE FLOW REGIME OVER THE DEEP
TROPICS W OF 105W. MODERATE UPPER LEVEL DIFFLUENT SWLY FLOW
S OF 18N BETWEEN 110W AND 130W WAS AIDING IN FIRING UP SCATTERED
MODERATE CONVECTION ALONG AND WITHIN 120 NM N OF THE ITCZ
BETWEEN 126W AND 131W. MOST OF THE CONVECTIVE ACTIVITY WAS
OCCURRING TO THE W OF THE SURFACE TROUGH NOTED WITHIN THE ITCZ
ALONG 116W. HOWEVER AS THE SURFACE TROUGH MOVES WWD OVER THE
NEXT 24-48 HOURS...CONVECTION MAY INCREASE ALONG THE TROUGH
WITHIN THE CORE AREA OF DIFFLUENT FLOW. THE WEAK LOW PRESSURE
AREA NOTED EARLIER NEAR 6N115W HAS FALLEN IN A GAP IN THE 1306
UTC QUIKSCAT PASS AND IT IS QUESTIONABLE FOR NOW WHETHER THIS
FEATURE STILL EXISTS.
Areas dealing specifically with the low highlighted.
EDIT: Wasnt paying attention to what all I highlighted.
Last edited by brunota2003 on Sun Feb 24, 2008 12:50 pm, edited 1 time in total.
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Re: Powerful Winter Storm near US West Coast
Shows how a Low can look like a cyclone even over cold water.
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Hurricaneman
- Category 5
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- Location: central florida
Re: Powerful Winter Storm near US West Coast
Is it possible that this may have been subtropical at one point or even an unnamed hurricane
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HURAKAN
- Professional-Met
- Posts: 46086
- Age: 38
- Joined: Thu May 20, 2004 4:34 pm
- Location: Key West, FL
- Contact:
Re: Powerful Winter Storm near US West Coast
Hurricaneman wrote:Is it possible that this may have been subtropical at one point or even an unnamed hurricane
SST too cold to even talk about a transition. This was just a powerful non-tropical system. Some polar lows can look exactly like a hurricane, but it's just the looks and nothing more.
For example:
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