January 1999

RAINFALL

January rainfalls in the Geelong region were generally consistent with long-term established patterns. Rain fell on only a small number of days, and several large falls were associated with thunderstorm activity. Totals varied greatly and there were some locally heavy falls. Most falls in the urban area were between 30-40 mm which is average for January. The Bellarine Peninsula generally fared well with above average falls, and Portarlington amassed the highest total with 71 mm, most of that falling on the evening of the 28th. Meredith, Inverleigh and Werribee areas also received above average rains, but the Otways still gives cause for concern. At West Barwon (Forrest) the total was only 13.2 mm; there is no prospect of the removal of Geelong’s water restrictions with the dam only 11% filled. However Wurdi Boluc, the holding reservoir downstream is now at 88% capacity which means there is no immediate danger of further restrictions.

RAINFALL PROSPECTS

The signs are still inconclusive. A 50% likelihood of above average rains for the region over the next three months is the best the models can offer.

TEMPERATURES

Temperatures for January worked out to be almost right on average. Average maximum was 23.97 (compared with normal 25.2) but average minimum was 14.77 (compared with 13.6). Only three days exceeded 30 degrees (the average in January is six) and a new record low maximum of 15.6 was created on the 7th.

RAINFALL DATA

 

GEELONG REGION
Location Total for
Month
(mm)
Monthly
Average
(mm)
Aireys Inlet 28.4 24.4
Anglesea 25.5 36.0
Apollo Bay 35.0 52.1
Bacchus Marsh 28.0 33.0
Ballan 35.4 34.9
Ballarat 30.8 39.1
Bannockburn 26.0 30.0
Barwon Heads 31.0 33.0
Bellbrae 39.0 51.1
Beeac 22.6 27.9
Birregurra 18.0 27.9
Cape Otway 48.0 43.9
Colac (Elliminyt) 17.0 62.4
Dereel n.a. n.a.
Drysdale 36.0 41.4
Forrest (West Barwon) 13.2 57.0
Gellibrand 20.0 41.7
Inverleigh 49.0 25.7
Laverton 42.2 40.0
Melba Gully n.a. n.a.
Melbourne (City) 21.2 48.0
Meredith (Darra) 43.2 40.9
Modewarre 38.3 35.0
Mt Moriac n.a. 26.9
Portarlington 71.0 33.8
Queenscliff 32.5 35.0
Shelford n.a. 33.0
St Leonards 49.0 35.0
Teesdale 31.0 37.8
Torquay 19.7 29.0
Wallington 44.5 31.5
Warrnambool Airport 12.2 51.6
Weeaproinah 56.2 87.0
Werribee 56.0 31.8
Winchelsea 24.0 25.4
GEELONG SUBURBS
Location Total for
Month
(mm)
Monthly
Average
(mm)
Avalon 25.0 37.1
Bell Park 29.0 34.8
Belmont 28.0 34.2
City 29.0 32.2
Connewarre 36.7 39.2
Corio 39.5 35.0
Grovedale 31.5 34.3
Highton 25.8 34.2
Lara 21.5 27.7
Lara (Serendip) 27.8 27.7
Leopold South 53.5 49.2
Manifold Heights 27.3 34.8
Mt Duneed Airport 27.6 28.1
Mt Duneed West 33.5 28.1
Norlane 28.0 44.3
Whittington 38.0 32.2