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#1422873 - 07/05/2017 09:15 Stubborn Highs ... [censored] Weather
CaptainAhab Offline
Cloud Gazer

Registered: 20/03/2017
Posts: 3
What's up with the 1030 pressure and 100% overcast skies and spitting rain for days. Based on the pressure there sure be full sun and a nice dry 20 knot breeze. Our wind direction is forecast from every direction for the next week as was last week.

Is the Rapture coming?

Depressed in SA

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#1422932 - 08/05/2017 11:54 Re: Stubborn Highs ... [censored] Weather [Re: CaptainAhab]
ozthunder Offline
Weatherzone Addict

Registered: 23/09/2001
Posts: 2944
Loc: Mt Warrigal, NSW, Australia
Welcome to anticyclonic gloom !
_________________________
Michael Thompson
http://ozthunder.com

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#1422968 - 08/05/2017 20:56 Re: Stubborn Highs ... [censored] Weather [Re: CaptainAhab]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3269
Loc: Artarmon (Sydney North Shore)
It's a pattern all too common on the Southern and Central parts of the NSW coast, especially in the warmer months. High pressure centred around 40 to 45 degrees South generates a SE air stream that sends cool, dank Southern Tasman air over the coast.

The cool, humid air in the lower atmosphere is trapped East of the Great Divide and below warmer air aloft. Cloud spreads out in horizontal sheets at the top of the layer, blocking out any solar heating and cutting off convection that might create thunderstorms or heavier rain. The result is cool, humid, overcast weather with periods of drizzle or light showers but often no rain at all. The temperature is stuck around 20-21 (in Summer, a bit lower in cooler months) all day and all night.

A similar pattern in California in late Spring / early Summer is called May Grey or June Gloom, Bummer Summer if it persists later. In California, it doesn't spread so far inland and is often associated with fog. In NSW it will be foggy in elevated areas like the Illawarra escarpment and the Blue Mountains.

Like the Californians, we don't mention it in tourist brochures.

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