Current Weather Conditions - January 2012

Wild Bill

blackius wrote: »

crucially dewpoint

What's crucial about dewpoint?

lostinashford

Wild Bill wrote: »

What's crucial about dewpoint?

Saw this on the *** pretender site, explains a little about dewpoint
http://www.iwo.ie/2012/01/30/forecasting-snow-in-ireland/

Hope this link isn't breaking any rules???

Wild Bill

lostinashford wrote: »

Saw this on the *** pretender site, explains a little about dewpoint
http://www.iwo.ie/2012/01/30/forecasting-snow-in-ireland/

For snow to settle, it be ideal if the air temp was at 1C or below and Dp below -0C.

Snow falling is pointless....we need it to settle! So, in summary, the air temp should be less than 1C.

Only then does dp matter :cool:

talkabout

Wind 9.2 km/h NE. Barometer 1020.3 hPa, Falling slowly. Temperature 3.6 °C. Rain today 3.9 mm. Humidity 81%

FrDougalMcguire

Current conditions Charlestown, Co. Mayo Temperature: 3.8C DP 4C, Humidity: 98%, Rainfall today: NOSIG, Pressure: 1013hPa, steady, Wind: 13.7 kph ene Cloudy

lostinashford

Wild Bill wrote: »

Snow falling is pointless....we need it to settle! So, in summary, the air temp should be less than 1C.

Only then does dp matter :cool:

Dead right - unfortunately Evelyn didn't give us much chance on 9 news:mad:

lostinashford

Ashford, Co. Wicklow @ 22.00
Temp 3.7˚c
Dew point 3.4˚c
Humidity 98%
Wind 6.4km/h gusting 13km/h S
Pressure 1022.9hPa steady
Rain 13.7mm and still coming (if only it was snow!!!)

aurora 527

Waterford.
Rain and more rain!
Temperature has hovered for the majority of the day between 5.6c and 6.2c.
Current temp 5.7c
DP 5.2c
Rainfall 7.1mm so far.
Wind ESE 16km/h
Humidity 97%
Bring on the cold....:)

mickger844posts

Dull and Damp, Temp 4.5c, Rain 4.6mm, Wind Easterly @ 13km/h

Live Data and more @ www.waterfordweather.com

blackius

Arklow
East 14kmph
air temp 3.8c
Dew point +0.3c
Cloudy and dry

blackius

lostinashford wrote: »

Wild Bill wrote: »

Snow falling is pointless....we need it to settle! So, in summary, the air temp should be less than 1C.

Only then does dp matter :cool:

Dead right - unfortunately Evelyn didn't give us much chance on 9 news:mad:

Dew point is crucial for knowing if precip when it gets to you is going to be snow or not.
Unless the precipitation is very heavy the dp must be below zero.
In any case it would want to be less than 0.5c

So when radar watching we watch dew points aswell.

lostinashford

Ashford, Co. Wicklow @ 10.50
Temp 3.5˚c, dewpoint 2.2˚c
Dry with pressure 1027hPa rising

Harps

Dp below zero here, first time all winter during the day and with clear blue skies. Temp 3.2C, dp -0.6C, no chance of any real precipitation here of course but great to wake up to a clear crisp morning for the first time in god knows how long. I'd gladly take a week of this

blackius

Dew point also gone below zero here on the cloudy coast at Arklow co wicklow

Air temp 4.2c
dp is -0.6c

Wind ESE 16kmph

jdee99

Temp 4.1C
Humd 90%
Wind 14.0kmh ESE
Rain 0.0mm since midnight
Pres 1026.0 hPa Steady

Overcast,grey and chilly in Ballyhaunis


www.carrowhawny.com - now has Global Network of Weather Stations and Google Public Warnings

nacho libre

I'm delighted, after three days of wretched mild and damp weather, to say it's now cold and crisp in a light easterly breeze. It's just too bad we'll be back to the old regime on Friday. How people prefer mild weather to this I just don't know!

mayo.mick

4.7c falling
1.0c Dp
77% Rh
1047.2 hpa rising
0.3 rain last 24hrs
cloudy

mickger844posts

Temp dropping here the last hour or so. Currently its 4.3c DP 0.6c

www.waterfordweather.com

kenmc

Goatstown, D14 @17:30

Temperature: 2.4C
Humidity: 71%
Rainfall today (so far): 0.3mm
Pressure: 1018.5 mb Rising slowly
Wind direction: ESE (sheltered guage)
Wind speed: 4kph / gust 13.3kph

FrDougalMcguire

Current conditions Charlestown, Co. Mayo Temperature: 1.7C falling, DP: 0C, Humidity: 85%, Rainfall today: NOSIG, Pressure: 1024mb Rising, Wind: 4.3 kph NNE Overcast

kenmc

dp down to -3.3 now. falling fast

mayo.mick

1.3c falling
-0.7c DP
87% RH
1048.3 hpa rising
0.0mm rain today
Clear sky

Harps

nacho libre wrote: »

I'm delighted, after three days of wretched mild and damp weather, to say it's now cold and crisp in a light easterly breeze. It's just too bad we'll be back to the old regime on Friday. How people prefer mild weather to this I just don't know!

Same here, easily the best day we've had all month, dry (:eek:), bright, blue skies all day and light fog making for a great sunset. Temperature steady between 2C and 3c all evening

crosstownk

Location: Terenure, Dublin
Temp 4.0ºC / DP -1.8ºC
Humidity 66%
Pressure 1030.3 hPa - steady (3hr)
Wind : 5.0 km/h Gust 7.2 km/h (at 3.5m)
Rainfall : 0.0mm-1hr; 0.3mm-24hr.

Feels very cold outside.

lostinashford

Ashford, Co. Wicklow @ 20.30
Temp 3.3˚c
Dew Point -4.4˚c
Humidity 57%
Wind 9km/h gusting to 14.8km/h ENE
Pressure 1031hPa rising
Rain 1mm

Wild Bill

Sandyford @ 21.00 (Tuesday)

Temperature: 3.0C
Humidity: 76%
Rainfall today (so far): 0.8mm
Pressure: 1030.8hPa, rising
Dew point: -0.4C
Wind: E - 14kph / gust 32kph

At 5am stopped raining after 53 hours (31.4mm)!

Overcast, bit of a breeze.

talkabout

Wind 2.3 km/h N. Barometer 1029.9 hPa, Rising slowly. Temperature 2.5 °C. Rain today 10.5 mm. Humidity 85%

crosstownk

Some interesting differences in humidity. Anyone any ideas as to why?

lostinashford

crosstownk wrote: »

Some interesting differences in humidity. Anyone any ideas as to why?

Is it due to the air temperature, colder on coast as the beast nudges west

No idea really but a thought

Wild Bill

crosstownk wrote: »

Some interesting differences in humidity. Anyone any ideas as to why?

Easterly air rises and cools (thus more moist) as it gets here.

When wind from West, it is descending, warming and drying - thus relatively warm and dry in westerlies.