Topics tagged with rainfall

Bug of Weather Radar doesn't seem to move

budriz — Invalid Date

@Suty hi there thanks the specific location at the island of Langkawi and border of Malaysia Thailand however it's fine now. Thanks for your great help 👍🏻. Appreciate it very much. ⭐ ⭐ ⭐ ⭐ ⭐

Is it possible to see total rain mm/day?

Fernando Leal — Invalid Date

@Gkikas-LGPZ unfortunately using this layer doesn't help me at all. The idea is to have an easy picture of what is going on in the forecast of my place. Information such as presented in the Meteoblue app, showing the mm expected for each day, are very helpful to plan the week. Windy only shows the tiny little drps that doesn't help much. Moreover, Meteoblue app shows the value of max and min temp for each day, which is precious! Windy only shows max, i never understood why. Min temp are also very important. I really would like to have only one app but at this moment I can't, so lets keep searching

Temp and Rainfall Swapped

Suty — Invalid Date

@Jonno53 Could you please show us a screenshot?

Rain forecast

idefix37 — Invalid Date

@Robert-Hamberger-III No, that is not possible because Windy uses only deterministic weather models. Probability is given by ensemble models that would make this app very heavy. Windy prefers to show several models which enable you to get an idea about the chance of rain. At bottom of meteograms see Compare to get a multimodel panel: [image: 1662993855323-2e52b63b-3685-444d-953c-475ef90b966d-resized.jpeg]

Seasonal rain acumulation

idefix37 — Invalid Date

@ladrillero You should easily see that the Rain accumulation is the precipitation predicted for the next 10 days at maximum. There is no way to predict annual or trimestrial precipitation !

Rainfall predictions southern Spain

idefix37 — Invalid Date

@richardappleyard You know that Windy does not design any weather models. They are developed by national weather centres. But there are some meteorological events which are difficult to predict precisely at a location, such as convective rain. In any case it is useful to look at the rain map to see the precipitation chance in the neighbourhood.

Rainfall days per milli seconds

Korina — Invalid Date

@karthikeyank Hello, we visualize forecast based on weather models. Models do not show precipitation in seconds.

Rainfall History

ianspencer — Invalid Date

@idefix37 I wouldn't expect a fast or useful answer from the BOM. I have been looking at Weather Underground for real time very local data historical weather data particularly rain accumulation graphs. You often even in rural areas have a wide selection of reasonably accurate low cost weather stations and you get very frequent updates you just don't get from the BOM and data that isn't available in Windy like rainfall history. About 5% of the stations are lower quality results but looking at the map and comparing nearby monitors output you can quickly eliminate them. It is a reasonable crowd sourcing weather project that fills a gap that Windy or BOM don't provide.

Inconsistent max value on scale 'rainfall'

idefix37 — Invalid Date

@handigehenriette Hi, showing '100mm' as the maximum value for 10 days accumulation would be much to low in some regions. The color scale for Rain accumulation looks strange because it is based on a logarithmic scale: https://community.windy.com/topic/10039/status-barr-amount-of-rain?_=1624180008100 So that’s not at all a bug.

Recent rainfall accumulation

Bruzote — Invalid Date

@dan-easton - What about experimenting with some of the maps at this source below and seeing if you can establish correlation? Maybe a certain amount of soil moisture anomaly would correspond to puddles? NOAA also might have other sources you could find helpful. well. Their hydrological modeling is extensive. You might even try a call to the local wx office, as each office sometimes has their own wx and hydrology tools/outputs available for public use (put on their local page, actually). At least, it used to be that way about ten years ago or so. I assume not much has changed with that. The wx office page on the NOAA/NWS site or the local office phone number would be your best bet for such a contact. Here is the most relevant source I found with a quick search: https://www.cpc.ncep.noaa.gov/soilmst/index_jh.html Again, maybe it's not acculumated rain in the latest 1/2 day increments, but it is a start.

Hourly rain does not show 3 hour rain

o0snoopy0o — Invalid Date

@idefix37 thank-you for the explanation.

Rain Value Meaning In Meteogram?

Yves70 — Invalid Date

@nwindy Yes, the way the ensemble model calculates the probability is as you explain : for instance for the rain, each dot of the 21 dots can give a different level of rain (1mm, 4mm, 10mm,...). Based on that set of different levels of rain, the model can calculate several probabilistic values such as the average, variance,... This will allow you to quantify the risk of rain Now, if the model has to adopt the same approach for many other parameters, such as pressure, temperature,... And for each parameter do the 21 calculations (do not forget that each calculation is the equivalent of a single deterministic calculation), computional limitation will be the issue if the model keeps the same grid. To overcome this problem, grid is bigger, calculation of the 21 dots for the different parameters becomes ok but accuracy will decrease. Computational calculation is key. In average, weather forecast improves by one day every 10 years thanks to the computer (super calculator) progress

Combine rainfall and temperature on one map?

Dcampbell305 — Invalid Date

@idefix37 Indeed so! Apologies to both!

The first worsening of 2020 is on the track to Mediterranean

Paolo Saracino — Invalid Date

@Gkikas-LGPZ You are right and thanks for the correction 👍🏻

Alerts are awesome - apart from the Rain

herbacious — Invalid Date

It seems to only be possible to assert that there is a minimum amount of rain

In fact I need to assert that there is a maximum amount of rain. I would probably set this to 0mm - i.e. it must not be forecast to rain at all

This one thing unfortunately makes the alerts a bit pointless for me. I'm based in the UK, we get a lot of rain!

Albania and Greece to get excessive rainfall, severe wind gusts, large hail, and tornadoes

pavelneuman — Invalid Date

Valid: Tue 19 Nov 2019 6:00 to Wed 20 Nov 2019 6:00 UTC
Issued: Mon 18 Nov 2019 21:29
Forecaster: DAFIS

A level 2 was issued for Albania and Greece for excessive rainfall, severe wind gusts, large hail, and tornadoes.
A level 1 was issued for Croatia, Bosnia and Herzegovina, Montenegro, Albania, S Italy, and Greece mainly for excessive convective precipitation and severe wind gusts.

Synopsis

The largest part of western and Central Europe is under the influence of a long-wave trough and as a result, strong WAA is found in eastern parts of the continent with unseasonably warm conditions.

Several embedded short-wave troughs can be found in the forecast maps, one of them is about to create favorable conditions for severe weather in Mediterranean. Another trough is approaching from the Atlantic, reaching Ireland by the end of this forecast.

A few storms will develop at the leading edge of this trough, reaching Portugal in the early morning of Wednesday.

Discussion

Croatia, Bosnia and Herzegovina, Montenegro, Albania, S Italy, and Greece

The axis of the trough over the Mediterranean becomes negatively tilted, with a jet streak extending from Tunisia towards the Balkans. The mid/low-level vorticity maxima will provide large-scale lift of very moist air masses (9-11 g/kg mixing ratio) over the Ionian Sea and steep mid-level lapse rates will result in high CAPE values.

An environment SW of Albania and Greece, characterized by 1000-1500 J/kg MLCAPE, 15-25 m/s DLS and more than 150 m2/s2 SREH0-3km will be conducive for the development of severe storms. A few supercells are expected, able to produce severe wind gusts, large hail, tornadoes, and excessive rainfall. Large hail is expected in the southern part of the level-2 area, with the least favorable environment in Albania (lower NCAPE).

The most intense convective activity is expected to reach Greece and Albania in the late afternoon or night of Tuesday, while in the morning, storms will affect mostly offshore areas and the coasts of S Italy. In southern Italy, flash floods will be the main threat, as well as in the rest of the Balkan States during the early morning of Wednesday marked with a level-1.

Tornadoes are expected mostly in the level-2 area where low-level shear and helicity will be maximum, but also waterspouts are expected in South Italy.

Medicane: Heavy rain and wind on the program!

Gkikas LGPZ — Invalid Date

I think its too early to be sure. Forecasts are changing day by day. ECMWF and GFS are not in agreement for the situation (Sat. 26 Oct / 12 Z) [image: 1571638271920-eb95e7ac-19a6-46d1-891d-916bbf332285-%CE%B5%CE%B9%CE%BA%CF%8C%CE%BD%CE%B1.png] For medicanes in previous years: Nov. 2017 https://community.windy.com/topic/4935/medicane Sep. 2018 https://community.windy.com/topic/6788/a-medicane-expected

Pin units (l/km^2) is questionable

idefix37 — Invalid Date

@AndiDuen In Thunderstorms layer, l/km2 means lightning per square kilometer. The amount of rain is in mm or in inches, but never mm/m2. Sometime one uses l/m2 (liter per square meter). 10mm=10l/m2

Kutch, the driest district in India, receives decent amount of rainfall

ronakdgajjar — Invalid Date

Kutch, the largest and the driest district received good rain fall today. Rapar Taluka still continues receiving rainfall as of now 11.15 pm IST.

Locals report that Balasar, Fatehgadh, Rapar city and nearby villages received from 1 to 3 inch accordingly.

One of the finest grassland of asia Banni, Received 1.5 inch rain today. Kutch is facing worst draught of 3 decades so this rain is like a blessing.

It shoud be also noted that also Nakhatrana taluka received appx. 1.5 inch rainfall yesterday.

Ronak Gajjar

Journalist at Divya Bhaskar. Wildlife conservation columnist and passionate wildlife photographer from Bhuj, India. Follow me on Twitter.

Rainfall in Android app can't be set to inches

idefix37 — Invalid Date

@derekvof Sorry, on iOS it works for me.