File:CPC-NCEP-NOAA Blocking strength GHGS 20 Oct 2018 - 20 Jan 2019.png

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Description	English: All colored regions in the hovmoller plot below depict regions where the flow is blocked according to the blocking index (Tibaldi and Molteni 1990). The color scheme denotes the strength of the blocked flow as determined from the 500 hPa geopotential height gradient measured from the blocking ridge equatorward (denoted GHGS in blocking index definition). The presence of an intense cutoff low equatorward of the blocking ridge can act to enhance the blocking strength. (Text after NOAA, Blocking).
Date	20 January 2019
Source	NOAA NCEP CPC > Climate & Weather Linkage > Blocking: 1panel_ghgs_obs_nh_nrm.gif
Author	NOAA / National Weather Service / National Centers for Environmental Prediction / Climate Prediction Center Internet Team
Other versions	16 Dec 2018 - 20 Jan 2019 (cutout)

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current	22:36, 22 January 2019		518 × 498 (9 KB)	W!B: (talk \| contribs)	=={{int:filedesc}}== {{Information \|description={{en\|1=All colored regions in the hovmoller plot below depict regions where the flow is blocked according to the blocking index (Tibaldi and Molteni 1990). The color scheme denotes the strength of the blocked flow as determined from the 500 hPa geopotential height gradient measured from the blocking ridge equatorward (denoted GHGS in blocking index definition). The presence of an intense cutoff low equatorward of the blocking ridge can act to en...

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