Heavy coastal showers – New South Wales North Coast, 15-21 February 2021

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Heavy coastal showers - New South Wales North Coast, 15-21 February 2021

During the period 15 to the 21 February 2021, coastal showers have impacted the coastal strip of New South Wales from Sydney to the Queensland border and inland to the Great Dividing Range. Very little of the rainfall has penetrated inland west of the Great Dividing Range.

Heavy coastal showers - New South Wales North Coast, 15-21 February 2021

Some rainfalls have been significant in localized areas and over the past 7 days, accumulative rainfalls have been significant for some locales. For the 24 hours to 9 am 20/2/2021, some heavy rainfall totals include:-

Richmond / Tweed River valley / Far North Coast (NE New South Wales)

The Channon 201 mm.

Dunoon 163 mm.

Byron Bay 131 mm.

Mullumbimby 121 mm.

Yelgun Creek.

Localised falls exceeding 100 mm were common in this area but limited to this region.

Bellinger Valley

Bowraville 116 mm.

Mid North coast

Redoak 129 mm.

Laurieton (Mill Street 118 mm).

As a result of the constant rainfall, some flooding has occurred in river catchments including the Bellinger River at Thora and the Wilson River at Lismore, both of which were in minor flood during Saturday.

Heavy coastal showers - New South Wales North Coast, 15-21 February 2021

During Saturday 20/2/21, constant showers soaked the Port Macquarie region on the Mid North Coast of New South Wales which included rainfall totals of 65 mm at Port Macquarie Dam and 72 mm at Redoak (Figures for the 24 hours to 9 am 21/2/21).

Heavy coastal showers - New South Wales North Coast, 15-21 February 2021
Heavy coastal showers - New South Wales North Coast, 15-21 February 2021

For the week ending 20 February 2021, accumulative rainfall totals have reached in excess of 200 mm for the coastal areas of the Tweed River Valleys and the Bellinger Valley / Coffs Harbour Region with significant areas of the North Coast of New South Wales also receiving at least 100 mm to 150 mm.

Across Sydney, falls have been lighter with accumulative totals in the range of 25 mm to 50 mm common however some of the showers have also been heavy although brief in nature. Onshore winds have brought much cloud and high humidity with regular showers, especially overnight and early morning but no significant hot weather.

The rainfall plots have been generated from the Water and the Land site (Bureau of Meteorology)  dated 20 and 21 February 2021.

Satellite images of winter snow storms USA – 17 February 2021

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Satellite images of winter snow storms USA - 17 February 2021

A significant cold air mass has enveloped vast areas of the United State of America and the resulting snowfalls that have fallen are truly remarkable.

Satellite images of winter snow storms USA - 17 February 2021
Satellite images of winter snow storms USA - 17 February 2021

The satellite images taken from NASA Worldview (16/2/2021) shows the extent of the bitter winter cold snap impacting vast areas of the United States and indeed much of the North American continent. The snow storms have impacted vast areas and images show snow on the ground in places such as New Mexico, large areas of Texas, with snow falls as far south as San Antonio and Houston in Southern Texas, Mississippi, Alabama, Georgia and even reaching into northern Florida (The Panhandle).

Satellite images of winter snow storms USA - 17 February 2021

The images show the east coast north to approximately Virginia being spared of this snow storm.

Satellite images of winter snow storms USA - 17 February 2021

Heavy snows have impacted the north east including New York and Boston and ice can be seen forming in parts of the Great Lakes region near Chicago (Illinois) from the cold.

Satellite images of winter snow storms USA - 17 February 2021

The Midwest is heavily impacted and heavy snowfalls have also impacted the Sierra Nevada mountains of California. There is even recent snow around the Las Vegas region of Nevada which is an arid region.

Satellite images of winter snow storms USA - 17 February 2021

Winter snow storms are common across much of the country each year in winter but this event is unusually extensive and impacting vast populations and major cities right across the country.

Satellite images of winter snow storms USA - 17 February 2021

According to the Weather Prediction Centre (NOAA) for the 17 February 2021, more than 100 million residents were placed under winter watch warnings for the day.

Satellite images of winter snow storms USA - 17 February 2021

As an example of how cold it has been, on the 15/2/2021, the coldest location in the United States was minus 46F (Approximately minus 50.8C) at Ely - Minnesota and the coldest location on the 16/2/2021 was minus 38F (Approximately Minus 36.4C) at Seagull Lake - Minnesota.

This event is too vast to examine temperature records at any specific location.

Satellite images of winter snow storms USA - 17 February 2021
Satellite images of winter snow storms USA - 17 February 2021

A reasonable guide on the maximum and minimum temperatures for the 17/2/21 has been generated on the National Weather Service site - Graphical forecasts “Temperatures plot”. One is generated for 4 am and one is generated for 1 pm and both show the Midwest and northern areas bearing the brunt of the cold. Generally, only Florida and the south west (Southern California and coastal areas) are escaping the winter blast and its deadly impact.

Rain event – South East Australia 12 to 14 February 2021

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Rain event - South East Australia 12 to 14 February 2021

While not an extreme rain event, a significant rainband has crossed south east Australia over the past 3 days that has brought widespread rain to large areas.

Widespread falls of between 25 mm and 50 mm with isolated heavier falls of above 50 mm has been a feature. Generally, the northern areas of the South West slopes, Central West New South Wales, Central Tablelands and the eastern areas of the plains (Wheat / Sheep belt) of New South Wales has benefitted the most.

Rain event - South East Australia 12 to 14 February 2021
Rain event - South East Australia 12 to 14 February 2021

This is the third or in some cases, the fourth major weather event within the past 3 weeks. While no major rivers are in flood, this rain is certainly reducing the effects of the most recent drought and generating runoff for dams and rivers.

Rain event - South East Australia 12 to 14 February 2021

This event past over Victoria but produced only light showers generally between 1 and 5 mm. However, as it moved into the South West Slopes and Central West areas of New South Wales, rainfall totals increased dramatically due to more moisture being available.

The heaviest totals include an isolated fall of 81 mm at Wollombi, south west of Cessnock, 67 mm at Barrington Tops, 59 mm at Barrington (Bonnie Doon Salisb) and 53 mm at Warialda. Large swathes of the New South Wales wheat sheep belt centred on Dubbo, Forbes, condobolin and Mudgee received between 25 mm and upwards of 50 mm from this event.

Rain event - South East Australia 12 to 14 February 2021

This event past over Sydney and produced widespread rainfalls within the range of 20 mm to 40 mm.

A number of rainfall plots produced from the Water and the Land for January and the start of February 2021 are showing how beneficial this rainfall and others have been.  There has been remarkable recovery across the Central West areas of the state, the lower north coast and to a lesser extent, the southern Murray region due to the events and the back up rain that is occurring.

As a result of this event plus other recent events, no part of New South Wales remains in drought.

Rain event - South East Australia 12 to 14 February 2021
Rain event - South East Australia 12 to 14 February 2021

The plots attached to this post are generated from the Water and the land include the rainfall for the Central West areas of New South Wales, the rainfall plot for the 24 hours to 9am 13/2/2021, the rainfall plot for the 24 hours to 9 am 14/2/2021, the weekly rainfall plot for New South Wales and the monthly rainfall anomalies and deciles both of which show how significant the most recent rain events have been.

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