NZ Weather Forum

Orion wrote:I was in Temuka and Geraldine on Thursday 24th, much more drizzle sweeping through that area than may have been indicated on rain-radar that day.
Almost always looks lush and green in Geraldine through summer.
Blusterous winds here in Ashburton at times today.

tunster wrote:
http://www.bom.gov.au/products/IDQ60801 ... 4569.shtml

Looking at the observations, the 34C only occurred because the flow was offshore (i.e. dry and not humid, with a dewpoint of 12C when the 34C max occurred) for a time in the morning. Once the onshore breeze developed, temperatures dropped as humidity rose.
Outside of equatorial and near-equatorial regions, there are very few places where it can be both 34C and humid (meaning dewpoints in the high 20s for a drybulb like that) at the same time. Cities near the Persian Gulf, Gulf of Mexico, Red Sea, parts of India - certainly subtropical Queensland is not globally notable enough to get onto that list.

I'm only pointing this out because I think we should stop people when they make mad claims like "40C with 95% humidity!!!" which you hear every summer from people in Australia. It is of course nonsense, because if 95% humidity occurred on the Australian east coast, it would be first thing in the morning when temperatures would be around the high teens. 40C and 95% humidity would never occur at the same time, given that the highest ever dewpoint recorded in the world was 35C (in Saudi Arabia).

spwill wrote:The GFS has been showing a trend for increasing dewpoint temperatures later this week and into next week, the arrival of Summer.

jamie wrote:

spwill wrote:The GFS has been showing a trend for increasing dewpoint temperatures later this week and into next week, the arrival of Summer.

That will be good. I am dead sick of this wind

spwill wrote:

tunster wrote:
http://www.bom.gov.au/products/IDQ60801 ... 4569.shtml

Looking at the observations, the 34C only occurred because the flow was offshore (i.e. dry and not humid, with a dewpoint of 12C when the 34C max occurred) for a time in the morning. Once the onshore breeze developed, temperatures dropped as humidity rose.
Outside of equatorial and near-equatorial regions, there are very few places where it can be both 34C and humid (meaning dewpoints in the high 20s for a drybulb like that) at the same time. Cities near the Persian Gulf, Gulf of Mexico, Red Sea, parts of India - certainly subtropical Queensland is not globally notable enough to get onto that list.

I'm only pointing this out because I think we should stop people when they make mad claims like "40C with 95% humidity!!!" which you hear every summer from people in Australia. It is of course nonsense, because if 95% humidity occurred on the Australian east coast, it would be first thing in the morning when temperatures would be around the high teens. 40C and 95% humidity would never occur at the same time, given that the highest ever dewpoint recorded in the world was 35C (in Saudi Arabia).

34.4C with a dewpoint of 12.1C does feel humid. You could also say 12C dewpoint is not dry air but all these things are relative. My comment about humidity was more about the day, general Dps 19C-20C.
21C dewpoint here this morning with towering clouds around, some downpours for the Sunshine Coast today

spwill wrote:

tunster wrote:
http://www.bom.gov.au/products/IDQ60801 ... 4569.shtml

Looking at the observations, the 34C only occurred because the flow was offshore (i.e. dry and not humid, with a dewpoint of 12C when the 34C max occurred) for a time in the morning. Once the onshore breeze developed, temperatures dropped as humidity rose.
Outside of equatorial and near-equatorial regions, there are very few places where it can be both 34C and humid (meaning dewpoints in the high 20s for a drybulb like that) at the same time. Cities near the Persian Gulf, Gulf of Mexico, Red Sea, parts of India - certainly subtropical Queensland is not globally notable enough to get onto that list.

I'm only pointing this out because I think we should stop people when they make mad claims like "40C with 95% humidity!!!" which you hear every summer from people in Australia. It is of course nonsense, because if 95% humidity occurred on the Australian east coast, it would be first thing in the morning when temperatures would be around the high teens. 40C and 95% humidity would never occur at the same time, given that the highest ever dewpoint recorded in the world was 35C (in Saudi Arabia).

My location was Noosa, Tewantin which is close to Noosa on the Noosa River had a max of 34.5C, dewpoint 18.1C
Inland at Gympie the max was 38.8C, dewpoint only 5.4C.