October 2009 North American storm complex

The October 2009 North American storm complex was a powerful extratropical cyclone that was associated with the remnants of Typhoon Melor, which brought extreme amounts of rainfall to California.[7] Around the same time, an atmospheric river opened up (the Pineapple Express), channeling large amounts of moisture into the storm, resulting in heavy rainfall across California and other parts of the Western United States.[8] Late on October 11, the extratropical cyclone absorbed the disorganized remnant of Typhoon Melor, causing the system's intensification to accelerate.[11] Later on the same day, the storm complex reached a peak intensity of 966 millibars (28.5 inHg), even as the system began looping back northwestwards, towards the Gulf of Alaska.[12] The two main lows merged again, even as the eastern chunk of moisture continued to accelerate eastward across the U.S., reaching the Central United States.[13] On October 15, the eastern chunk of moisture began exiting the Northeastern United States, while the main system continued to move northwestward in the Gulf of Alaska, weakening into a 988 mbar storm.[10] On October 17, the main low stalled just south of Alaska, while steadily weakening, even as the eastern chunk of moisture began a well-defined extratropical cyclone off the coast of Nova Scotia.[21] Rainfall from the storm system also helped extinguish several wildfires that were burning in California at that time, including the large Station Fire.A crash in the Caldecott Tunnel, requiring emergency repairs to the structure, led to a temporary closure and creating more traffic issues.At least 2 in (51 mm) of rain fell along the foothills of the mountains, making the remnants of Melor one of the wettest former tropical cyclones to impact the state of Nevada.

Western United StatesAleutian LowExtratropical cycloneBlizzardWinter stormSierra CrestMammoth Mountain Ski AreaMonterey County, CaliforniaSoutheast AlaskaWestern CanadaEastern CanadaContiguous United StatesMexico2009–10 North American winter stormsTyphoon MelorCaliforniaGulf of Alaskaatmospheric riverPineapple ExpressAlaskaWest Coast of the United Statesnor'easterCentral United StatesNortheastern United StatesNova ScotiaLabrador SeaYannickFree University of BerlinIcelandstate of CaliforniaMonterey CountyHurricane KathleenSan Gorgonio MountainSan FranciscoStation FireRichmond BridgeSanta Cruz MountainsSan Lorenzo ValleyHighway 101Category 4 hurricanejet streamNew York CityWalpack, New JerseyBostonLowellTyphoon Melor (2009)2009 Pacific typhoon season2009 California wildfiresGlobal storm activity of 2009Winter storms of 2009–10 in East AsiaColumbus Day Storm of 1962January 2008 North American storm complexOctober 2010 North American storm complexJanuary 2010 North American winter stormsDecember 2010 North American blizzardNovember 2014 Bering Sea cycloneDecember 2014 North American storm complexMajor snow and ice events in the United States2009–102010–112011–122012–132013–142014–152015–162016–172017–182018–192019–202020–212021–222022–232023–242024–25Feb 27–Mar 7Oct 4–11Jan 6–10Jan 12–13Mar 11–14Feb 11–14Nov 27–28Nov 6–11Mar 15–18Jan 27–28Nov 10–12Dec 25–26Nov 24–30Feb 17–18Mar 18–19Mar 18–22Mar 2–5Dec 11–13Jan 11–13Jan 18–21Mar 6–8Oct 25–30Dec 30, 1963 – Jan 4Jan 27–31Jan 26–27Feb 8–10Mar 5–8Dec 25–28Mar 3–5Jan 9–12Jan 28 – Feb 1Jan 25–27Feb 5–7Jan 13–14February 9–12Dec 22 – 24Oct 31 – Nov 3Dec 10–12Mar 12–15Feb 2–6Mar 31 – Apr 1Oct 24–26Jan 4–10Jan 2–4Jan 14–15Jan 18–30Dec 27–31Jan 29–31Dec 4–5Feb 14–19Dec 5–8Feb 17–23Dec 21–24Dec 24–28Jan 20–23Dec 14–16Feb 11–13Oct 11–13Nov 20–24Nov 26 – Dec 1Dec 20 – Jan 1Jan 11–24Feb 12–20Apr 13–17Nov 29 – Dec 4Nov 29 – Dec 5Dec 8–18Jan 3–11Mar 6–10Dec 11–12Dec 19–25Jan 25–30Dec 16–20Dec 22–28Jan 17–26Feb 1–6Feb 7–11Feb 24–27Mar 12–16Oct 23–28Dec 5–29Jan 8–13Jan 24–28Jan 29 – Feb 3Oct 28 – Nov 1Nov 8–10Jan 16–20Oct 29 – Nov 2Nov 7–10Dec 17–22Feb 7–10Mar 1–10Mar 18–20Oct 3–5Nov 22–28Dec 19–23Dec 30, 2013 – Jan 4Jan 20–22Feb 27 – Mar 4Mar 24–28Nov 8–13Nov 13–21Dec 9–11Dec 10–27Jan 23–30Jan 31 – Feb 2Feb 12–17Feb 25–26Mar 1–6Nov 24–27Dec 26–30Jan 21–24Jan 29 – Feb 7Feb 23–24Mar 21–25Apr 15–23Dec 23–26Jan 4–8Jan 7–13Jan 10–17Jan 19–24Feb 6–10Feb 12–14Feb 8–22Mar 11–15