May 2020

Tornado over Waurn Ponds and Armstrong Creek taken from Lara by Annette Kelly

Severe Storm damage in Waurn Ponds and Armstrong Creek on 20th May. Photos Geelong Advertiser.

SUMMARY

May was drier but cooler than the latest 30-year averages.  The major feature of the month was an official tornado which occurred at 1.10 am on the 20th.  See photos above.

TEMPERATURES

Geelong saw below average temperatures about 0.8 C lower than normal.  Minimums averaged 7.5 C and maximums averaged 16.5 C, compared with the normals of 8.3 C and 17.2 C.

There were only two days over 20 C (max 22.3 C on the 7th) and one frost (2.0 C) on the 18th.

RAINFALL

Average rainfalls around urban Geelong only received 30 mm, whereas the latest 30-year average was 40.1 mm.  This has been the driest month of this year, creating a total of 320 mm compared to the 30-year figure of 182 mm.

Even during the tornado on the 20th the rainfall maximum over most of Geelong only received about 10 mm.

OTHER FEATURES

An official tornado on the evening of the 20th lasted from about 1.10 am to 1.40 am as it crossed Mt Duneed, Waurn Ponds and Armstrong Creek.  The extreme damage was mainly to houses, fences, cars and garages with extreme destruction to tiled roofs, smashed windows to about 160 properties.

The Bureau of Meteorology estimated an average 60-metre wide path for a slightly winding 6-7 kilometres across the suburbs for about half an hour caused the damage, awakening about 160 homeowners.

The night photograph above was taken over Lara of the tornado during the lightning thunderstorm clearly showing the clockwise cloud movement where the severe storm was operating.

Further features of the month include 4 days of gusty winds over 60 km/h and one severe storm with thunder, lightning and hail on the 20th.

RAINFALL DATA

GEELONG REGION
Location Total for Month (mm) Monthly Average (mm)
Aireys Inlet 44.4 (55.6)
Anakie na (52.0)
Apollo Bay 142.0 (99.2)
Bacchus Marsh 27.0 (47.5)
Ballarat Aero 62.8 (68.1)
Bannockburn 43.2 (46.0)
Balliang East 32.2 (64.0)
Bellbrae na (65.1)
Bells Beach 22.8 (65.1)
Beeac 48.5 (57.2)
Beech Forest (Otway Fly) 190.2 (181.3)
Benwerrin na (64.5)
Cape Otway 91.8 (91.7)
Colac 99.5 (71.9)
Curlewis Golf Club na (n.a.)
Drysdale 40.8 (48.0)
Dereel 79.3 (59.0)
Forrest (West Barwon Dam) 89.4 (92.0)
Inverleigh 30.8 (56.6)
Hoppers Crossing 37.6 (64.2)
Meredith (Darra) 49.4 (60.2)
Moriac 33.4 (55.0)
Mt Gellibrand 59.6 (na)
Mt Mercer 88.6 (na)
Mt Sabine 141.4 162.4
Ocean Grove 38.8 (na)
Point Lonsdale na (57.0)
Queenscliff 31.6 (58.1)
Scotsburn na (na)
Sheoaks 53.6 (na)
Shelford na (37.0)
Teesdale 30.4 (44.0)
Sutherlands Creek na (41.0)
Winchelsea 54.6 (58.0)
GEELONG SUBURBS
Location Total for Month (mm) Monthly Average (mm)
Armstrong Creek 37.6 (40.5)
Avalon 25.0 (40.5)
Bell Post Hill 40.2 (40.7)
Belmont 34.0 (43.1)
Breakwater AWS 28.8 (41.5)
Charlemont 32.1 (43.9)
Corio 33.2 (41.0)
Grovedale 43.0 (45.8)
Grovedale South 42.0 (49.8)
Hamlyn Heights 39.7 (43.5)
Herne Hill 43.0 (40.5)
Highton North 26.1 (43.8)
Highton South 26.8 (43.8)
Lara 32.6 (39.4)
Leopold 40.5 (44.4)
Leopold East na (44.4)
Manifold Heights 38.7 (44.4)
Marshall 32.8 (44.4)
Moolap 23.6 (46.0)
Queens Park 35.8 (41.0)
Whittington 29.8 (41.8)
Average across Urban Area 30.0 (42.1)

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