{"id":11572,"date":"2012-10-15T12:59:59","date_gmt":"2012-10-15T12:59:59","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=11572"},"modified":"2012-10-15T22:15:38","modified_gmt":"2012-10-15T22:15:38","slug":"large-storm-over-the-arctic-ocean","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/11572","title":{"rendered":"Large storm over the Arctic Ocean"},"content":{"rendered":"
\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel images (click image to play animation)<\/p><\/div>\n

 <\/p>\n

AWIPS images of Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel data (above; click image to play animation)<\/strong><\/em> showed a very large storm moving slowly across the Arctic Ocean during the 13 October – 15 October 2012<\/strong> period. Large areas of stationary sea ice<\/strong><\/a> could be seen over portions of the Arctic Ocean.<\/p>\n

Widespread convective elements were apparent on the IR images, which were a result of an unstable air mass due to cold air advection across the region — this deep layer of instability could be seen on the 15 October 00 UTC rawinsonde data plot from Barrow, Alaska (below)<\/strong><\/em>.<\/p>\n

 <\/p>\n

\"Barrow,<\/a>

Barrow, Alaska rawinsonde data (00 UTC 15 October)<\/p><\/div>\n

The Area Forecast Discussion issued by the Fairbanks<\/strong><\/a> National Weather Service forecast office summarized the impacts of this large storm along the arctic coast of Alaska:<\/p>\n

NORTHERN ALASKA FORECAST DISCUSSION\r\nNATIONAL WEATHER SERVICE FAIRBANKS AK\r\n501 AM AKDT MON OCT 15 2012\r\n\r\n.DISCUSSION...\r\nTHE GFS AND NAM COMPUTER WEATHER FORECAST MODELS ARE IN GOOD\r\nAGREEMENT THROUGH 4 AM WEDNESDAY. A LARGE AND LONG-LIVED LOW\r\nPRESSURE SYSTEM NOW ABOUT 600 MILES NORTHWEST OF BARROW IS\r\nGRADUALLY WEAKENING...AND DRIFTING SLOWLY TO THE NORTHWEST. THE\r\nWEATHER AT SEA IN THE CHUKCHI AND ALONG THE ALASKAN CHUKCHI SEA\r\nCOAST IS THE MOST IMPORTANT ASPECT OF THIS MORNINGS FORECASTS.\r\n\r\nCOLD AIR HAS BEEN STREAMING DOWN FROM THE FAR NORTHWESTERN CHUKCHI\r\nSEA THROUGH BERING STRAIT. THE EDGE OF THE ARCTIC ICE PACK IS NOW\r\nABOUT 400 MILES NORTHWEST OF BARROW...AND ADVANCING SOUTHWARD 10\r\nTO 15 MILES A DAY.\r\n\r\nTHE ABNORMALLY LONG FETCH OVER THE CHUKCHI SEA DOWN TO THE ALASKA\r\nARCTIC COAST WEST OF CAPE HALKETT IS THE MAIN FACTOR IN THE\r\nBUILDUP OF ROUGH SEAS. THE INCOMING SWELLS AT BARROW HAVE BEEN\r\nFROM 4 TO 6 FEET HIGH. DUE TO ABNORMALLY FREQUENT WEST WINDS IN\r\nTHE ALASKAN ARCTIC THIS SUMMER AND FALL...THE WIDE BEACH AND\r\nSHALLOW WATER OUT FROM SHORE HAVE BEEN MUCH REDUCED. AS A\r\nRESULT...THE INCOMING SWELLS ON THE ALASKAN NORTHERN ARCTIC COAST\r\nARE NOT BREAKING SEVERAL HUNDRED YARDS OFFSHORE AS THEY USUALLY\r\nDO. INSTEAD...THE INBOUND SWELLS ARE NOT BREAKING UNTIL REACHING\r\nTHE SHORELINE. THE RUN UP OF THE BREAKING SURF IS CONSIDERABLY\r\nMORE NOW THAN IT WOULD BE UNDER NORMAL SHORELINE CONDITIONS.\r\n\r\nPOLAR ORBITING SATELLITE IMAGERY HAS SHOWN EXTENSIVE CONVECTIVE\r\nCLOUDS OVER THE CHUKCHI SEA. THIS...AND THE EARLY MORNING WEATHER\r\nBALLOON DATA FROM BARROW...KOTZEBUE...AND NOME...INDICATE AN\r\nUNSTABLE AIR MASS. THIS FEATURE GIVES A LARGER TRANSFER OF\r\nENERGY FROM THE WIND TO THE SEA. THIS HAS BEEN THE CASE FOR\r\nSEVERAL DAYS NOW.<\/pre>\n","protected":false},"excerpt":{"rendered":"
  AWIPS images of Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel data (above; click image to play animation) showed a very large storm moving slowly across the Arctic Ocean during the 13 October – 15 October 2012 period. Large areas of stationary sea ice could be seen over portions of the Arctic Ocean. Widespread convective […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37,49,48],"tags":[],"class_list":["post-11572","post","type-post","status-publish","format-standard","hentry","category-arctic","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=11572"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11572\/revisions"}],"predecessor-version":[{"id":11574,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11572\/revisions\/11574"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=11572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=11572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=11572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}