Bobgram 14 June 2026

Bob McDavitt's ideas for sailing around the South Pacific. Disclaimer: Weather is a mix of pattern and chaos; these ideas are from the patterned world. Compiled 14 June2026 Comparison of two recent coastal inundation events at Wellington South Coast Tuesday 9 June brought huge swells that inundated Wellington's south coast This had a Isobar reading 1008 Compare that with the 15-16 Feb 2026 coastal inundation weather pattern On that date the isobar reading was around 998. One of the factors we consider during coastal inundations is the "IB" or inverse baric /inverted Barometer effect. Average atmospheric pressure at sea level on this planet is 1013.35hPa, hence 1012hPa is always the straightest isobar on the weather map and divided High pressure weather from Low pressure weather. Every hPa above that depresses sea level by 1cm Every hPa below that raises sea level by 1cm There is a tidal gauge at Queens wharf in Wellington Harbour. It wasn't exposed to the large swell waves on the South Coast but was measuring the IB on 9 June 2026 The SS trace measures storm surge. More information about coastal inundation is available from one of the blogs I wrote for MetService back in 2011 : blog.metservice.com/Storm-Surge-23-Jan-2011 TROPICS There are no named storms this evening. .Mexico's Guerrero state was soaked by short-lived Tropical Storm Boris. . Tropical Storm Christina brought locally heavy rain and strong winds to parts of Nicaragua, Honduras and El Salvador. WEATHER ZONES SPCZ is expected to have a weak week and be situated well north of its normal position. HIGH H1 travelled east across NZ last week and should continue its migration along 30 to 35S this week. The burst of southerly swells on its eastern side is finally fading over Tahiti tomorrow. An upper trough moved across New Caledonia last few days and now its activity is descending between Vanuatu and Fiji, fading away the trade winds. On Monday it is expected to develop a surface low L1. This Low is then expected to deepen as it travels to the southeast, crossing Minerva on Wednesday. Fronts associated L1 and expected to travel east from Tonga to Tahiti this week . It planning to sail west , it may be a good idea to stay-put until this trough clears Tahiti around local sat 20 June. High H2 that is moving into the Tasman Sea next few days is expected to be diverted to the NE by L1. This opens the southern door. So even though the next Low L2 may start this week near 35S over South Australia, it is expected to brew a series of fronts that may cross the South Tasman Sea and South Island. This is activating the roaring 40s , and is in tune with an El Nino pattern that has now been declared www.noaa.gov/news-release/el-nino-forms-expected-to-strengthen-say-noaa-fore casters >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> If you would like more details about your voyage, check metbob.com Or Facebook at /www.facebook.com/metbobnz/ Weathergram with graphics is at metbob.wordpress.com (subscribe/unsubscribe at bottom). Weathergram archive (with translator) is at weathergram.blogspot.co.nz. Contact is bob@metbob.com or text 64277762212. >>>>>>>>>>>>>>>>