{"id":35093,"date":"2019-11-26T23:59:08","date_gmt":"2019-11-26T23:59:08","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=35093"},"modified":"2019-11-30T18:57:31","modified_gmt":"2019-11-30T18:57:31","slug":"bomb-cyclone-makes-landfall-along-the-oregon-california-coast","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/35093","title":{"rendered":"Bomb cyclone makes landfall along the Oregon\/California coast"},"content":{"rendered":"

\"GOES-17<\/a>

GOES-17 Low-level (7.3 \u00b5m),<\/em> Mid-level (6.9 \u00b5m)<\/em> and Upper-level (6.2 \u00b5m)<\/em> Water Vapor images, with surface fronts plotted in cyan and buoy locations plotted in red [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>A sequence of GOES-17 (GOES-West)<\/em> Low-level (7.3 \u00b5m<\/strong><\/a>), Mid-level (6.9 \u00b5m<\/strong><\/a>) and Upper-level (6.2 \u00b5m<\/strong><\/a>) Water Vapor images (above)<\/strong><\/em> showed the evolution of a bomb cyclone (surface analyses: WPC<\/strong><\/a> | OPC<\/strong><\/a>) that made landfall along the Oregon\/California coast just after sunset on 26 November 2019<\/strong><\/a>. The storm produced wind gusts<\/strong><\/a> of 106 mph in southwestern Oregon and 70 mph in northwestern California.<\/p>\n

GOES-17 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) images of the storm are shown below — the Mean Sea Level Pressure anomaly<\/strong><\/a> was 4-5 sigma below the climatological mean as the rapidly-deepening midlatitude cyclone made landfall. Similarly, 925 hPa wind speed anomaly<\/strong><\/a> was 3-5 sigma above the climatological mean. The system had transitioned to a warm seclusion phase by 00 UTC, as seen in a comparison of Visible and Water Vapor images<\/strong><\/a> at that time.<\/p>\n

\"GOES-17<\/a>

GOES-17 “Red” Visible (0.64 \u00b5m)<\/em> images, with surface fronts plotted in cyan and buoy locations plotted in red [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>A GOES-17 Mesoscale Domain Sector<\/strong><\/a> was positioned over the region, providing Visible images at 1-minute intervals (below)<\/strong><\/em>.<\/p>\n

\"GOES-17<\/a>

GOES-17 “Red” Visible (0.64 \u00b5m)<\/em> images, with hourly plots of surface wind barbs and gusts in knots [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>A larger-scale view of the entire GOES-17 Mesoscale Domain Sector is shown below, using Visible images from the AOS<\/strong><\/a> site.<\/p>\n

\"GOES-17<\/a>

GOES-17 “Red” Visible (0.64 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>1-km resolution NOAA-15 AVHRR<\/a><\/strong> Shortwave Infrared (3.7 \u00b5m) imagery at 0217 UTC (below)<\/strong><\/em> showed the center of circulation just off the Oregon\/California coast. At that time, winds were gusting to 50 knots at Crescent City, California (KCEC).<\/p>\n

\"NOAA-15<\/a>

NOAA-15 AVHRR Shortwave Infrared (3.7 \u00b5m)<\/em> image at 0217 UTC, with plots of 02 UTC surface reports (cyan\/yellow)<\/em> and wind gusts (in knots, red)<\/em> [click to enlarge]<\/p><\/div>A time series of surface data from Crescent City, California (below)<\/strong><\/em> showed the period when the air pressure dropped to 973.4 hPa (28.74 inches) — setting a new all-time low pressure record for the state of California. In addition, new low pressure records for the month of November were set at Medford, Oregon<\/strong><\/a> (981.4 hPa \/ 28.98 inches) and at Eureka, California<\/strong><\/a> (984.8 hPa \/ 29.08 inches).<\/p>\n

\"Time<\/a>

Time series of surface data at Crescent City, California [click to enlarge]<\/p><\/div>Air pressure at the offshore buoy 8 miles NW of Crescent City (46027<\/strong><\/a>) dropped to 971.7 hPa (28.69 inches) at 0350 UTC (below)<\/strong><\/em>.<\/p>\n

\"Plots<\/a>

Plots of Wind Speed (blue),<\/em> Wind Gust (red)<\/em> and Air Pressure (green)<\/em> from Buoy 46027<\/p><\/div>
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<\/p>\n
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The OR\/CA storm peaked pressure-wise with a central pressure of 970 hPa\/28.64″ at 7 pm PST before slowly weakening. Here are its impacts thus far: pic.twitter.com\/U4uHH0CBVW<\/a><\/p>\n

\u2014 NWS WPC (@NWSWPC) November 27, 2019<\/a><\/p><\/blockquote>\n