/r/AskWeather

Photograph via snooOG

Your one stop shop for your weather related questions!

Welcome to /r/AskWeather! We here are dedicated to ensuring that your answers get resolved by individuals that have experience in the weather industry. Are only rules here are that you follow reddiquette and try to spread factual information. So with that in mind, start asking!

/r/AskWeather

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1

Do vents of a double-canopy umbrella prevent lift off with the wind?

I frequently travel to the city for work, and on rainy, windy days, I feel like I'm going to get picked up by my umbrella like Mary Poppins. A raincoat isn't a great option for me because I need to carry a computer bag with me--I want it protected from the rain, too.

Do the vents of a double-canopy umbrella prevent the window from grabbing it and lifting upwards? Will I still feel like I'm getting taken off of the ground? Is there an umbrella design that will save me from taking flight?

0 Comments
2024/03/27
00:58 UTC

0

How will El nino/La nina effect the weather in New York state in Fall of 2024

Looking to plan an event in New York State this October and I'm trying to gauge the possible effect of El nino/La nina on the weather to help with my planning.

0 Comments
2024/02/09
18:13 UTC

2

What caused this frost "crack"?

Not sure if this is the right sub, but what causes frost to form in these lines? I also noticed this pattern on car windscreens as I was walking to the bus stop.

0 Comments
2024/01/18
07:41 UTC

2

Can vehicles and indoor heating systems break down if it gets too cold?

I saw The Day After Tomorrow and it showed vehicle's heating system breaking down because the weather was getting too cold and later one the entire automobile not working as the temperature went lower and lower into the negative F temperatures. The temperature kept dropping down so much that even the heaters of well developed public buildings like the New York Public Library broke down because it was too cold for the technology to cope.

I'm wondering is this possible irl? Like can a truck driver risk hypothermia because his truck's heating couldn't cope with the cold and stops sending warm air despite the rest of the truck still working? Or a hotel's entire heater system breaking down when it reaches below -40 F and everyone will heave to be in full inter gear inside the building to survive?

1 Comment
2024/01/17
08:24 UTC

1

What's the best app for looking at different weather models in a daily or hourly chart?

The Windy app lets you open up a page that compares hourly forecasts via GFS 22km, ECMWF 9km, ICON 13km, Meteoblue, NAM 5km, and HRRR CONUS 3km. Any similar recommendations?

1 Comment
2024/01/11
23:22 UTC

1

Is this A Nor'easter

https://www.accuweather.com/en/winter-weather/noreaster-to-dump-first-significant-snow-in-two-years-across-east-coast-cities/1608857

I have always thought with a Nor'easter the weather came in from the north east as described here, https://en.wikipedia.org/wiki/Nor%27easter

This weather seems to be moving from the west/southwest to the northeast.

1 Comment
2024/01/04
12:16 UTC

1

Is it true that vehicles and even smaller civilian air con systems can break down if the weather gets too hot?

I'm visiting Las Vegas this Christmas break and while I was talking about my trip at lunch, one of my classmates who isn't in my friends list came up and said she was at Las Vegas for Independence Day and that they took the trip to the Hoover Dam. On the way back to Vegas it became literal hell because the air con system stopped functioning and the whole one hour drive was like being baked inside a hot oven. The driver explained temperatures got so hot that day the bus's system couldn't handle it which is why the air conditioning started to send hot air instead of cooling the vehicle.

In addition when they were staying at a small motel, before going back to their main hotel over a temp stop, she said a the aircon in their room also stopped working. not even sending hot air and they decided to spend time at the lobby where it was still cold because the news stated it'll be 118 degrees by 10 AM. The official reasoning was again because the weather got too hot and some parts of the motel's cooling system couldn't cope.

I'm curious is this all plausible? I'm skeptical of my classmate's story because it never happened where I live where over 100 degrees F temperatures is the norm in Summer granted I live in a suburban town thats within a large geography of woods and not a hot desert and it never got anywhere close to 110 degrees, the most I remember was 104 degrees in F. But I'm having a hard time believing a modern used car can get its aircon screwed up by high outside heat let alone a commercial lodge's aircon not functioning in several rooms. Can this really happen?

2 Comments
2023/12/05
23:14 UTC

1

Differing means of rain measurement?

So last night Vancouver received "record amounts" of rain ~50mm total, and there was a lot of flooding. (Max I saw was 8mm an hour)

I grew up in Hong Kong and the lowest level of rainstorm signal they have is the amber rainstorm signal. On Wikipedia it says they post the warning if they expect 30mm of rain in an hour.

I've also experienced red and black rainstorm signals (50 and 70mm of rain in an hour respectively) however the scale of rain and the degree of flooding doesn't add up. Last night's rain felt heavy almost as much as a yellow signal, and it's flooding like a red signal. Are there different standards of measurement? Or perhaps other factors affecting my perception of the amount of rain?

0 Comments
2023/12/05
20:49 UTC

2

Actual purple rain in NYC right now. what would cause this?

1 Comment
2023/12/04
01:06 UTC

1

Why do hands get cracks and rough skin so frequently in cold weather and why does lotion and other similar stuff relieve this ailment?

Despite it being fall season now, I got pretty cocky. A few times I went out without gloves to do some field work and within minutes my hands ended up getting cracks and very rough skin that hurt so much. Until I was told by a nurse to put liquids like lotions, moisturizers, hand creams or some other stuff on it, it was hell. I learned the hard way and now wear gloves when I go out for any amount of time more than 3 minutes. That said I'm curious why does this happened in cold weather esp if you're not wearing some winter gloves and how does lotions and other similar liquids quickly relieve it?

0 Comments
2023/11/19
11:42 UTC

1

Why do you urinate more during cold weather?

As colder seasons starts to kick in, I notice me and my friends use the bathroom far more especially if we spend a lot of time outside a heated building like say walking on the sidewalk across a row of stores and service venues at the center of town. I remember it being so bad last winter that we frequently had to make stops ever 10 minutes or so at the nearest store or restaurant a few times we went out for a short distant walk to the nearest arcade. I'm wondering whats the reason for this?

0 Comments
2023/11/10
08:31 UTC

1

Why isn't there equal surface pressure everywhere on Earth?

This is the diagram I am referencing.

So, I've always had a difficult time understanding and visualizing constant-pressure charts, and I'm trying to tackle that. So this diagram shows a cold column of air over one city, and a warm column of air over another. It says that the surface pressure of these two cities are equal, since the mass of the air parcel above them is equal -- only the volume of the air parcel changes, thanks to changes in density. This, I understand. My question is: If there is a lack of air above the cold column, but there's still space for more, why wouldn't more air rush into that vacuum, resulting in higher surface pressures in the city beneath the cold column? Is it simply that the maximum height of the atmosphere (0mb) can be significantly lower with a cold-air column?

A follow-up question to my first one would be: If it is true that air columns will vary in height, but surface pressure stays constant, then why aren't surface pressures everywhere on Earth the exact same, if the same mass of air always settles over it?

2 Comments
2023/10/23
17:42 UTC

1

Why isn't there equal surface pressure everywhere on Earth?

So, I've always had a difficult time understanding and visualizing constant-pressure charts, and I'm trying to tackle that. So this diagram shows a cold column of air over one city, and a warm column of air over another. It says that the surface pressure of these two cities are equal, since the mass of the air parcel above them is equal -- only the volume of the air parcel changes, thanks to changes in density. This, I understand. My question is: If there is a lack of air above the cold column, but there's still space for more, why wouldn't more air rush into that vacuum, resulting in higher surface pressures in the city beneath the cold column? Is it simply that the maximum height of the atmosphere (0mb) can be significantly lower with a cold-air column?

A follow-up question to my first one would be: If it is true that air columns will vary in height, but surface pressure stays constant, then why aren't surface pressures everywhere on Earth the exact same, if the same mass of air always settles over it?

0 Comments
2023/10/23
17:42 UTC

1

Average monthly days of precipitation?

Hi, I would like to find out historically, on average, how many days of precipitation there are each month in Georgetown, SC, and Pawleys Island, SC. I'm not finding this on NOAA. Any ideas?

0 Comments
2023/10/21
00:13 UTC

3

Why is there an E after the fourteen?

1 Comment
2023/09/24
14:45 UTC

1

Weather Based Location Help

Hey guys I have been researching a bit on NOAA and other places but I thought I’d ask here. If it’s not the correct place please guide me to a better one.

I’m looking for a place in the US that does not snow much or get super cold (averages in winter above freezing) and does not get super hot in the summer.

I’m also looking for a lesser populated area (I know good weather drives population to some extent). I was looking at inland Pacific Northwest.

Trying to drill down a bit more and see if I’m missing something.

Any advice as to where to look would be appreciated.

Thanks.

0 Comments
2023/09/21
14:55 UTC

5

How does negative cold temperatures feel like?

While I live in a state that snows,winters are generally mild so much you can go through an entire year without any snow in some parts of the state. I visited Texas before during September years ago so I experienced temperature over 104 degrees hot and been to the desert so I know how extreme heat is like. But I never expereinced temperature below 0 fahrenheit. The coldest it ever got in the place I live in is 15 degrees from my recent memory. So I'm curiious how is temperature -1 fahrenheit and below like? I really wonder since this year has been pretty hot around the desert states and there are already forecasts predicting a colder winter in the East coast than usual (luckily I don't live there!). How different is it from the fahrenheit 10s and the general mild 30-40 F winters of the location I live in?

1 Comment
2023/09/16
20:00 UTC

2

How do I see actual long-range weather model forecasts?

If the GFS has a supposed model range of 16 days, how would one go about seeing the results of that range? TropicalTidbits only showed out around 4.5 days for me currently.

1 Comment
2023/09/11
04:03 UTC

1

Cumulonimbus Altitude Question

This is an oddly specific question, but I would like to know the minimum and maximum altitude of a cumulonimbus cloud's base. More specifically at any stage where cloud-to-ground lightning can occur.

I glanced at Wikipedia and they cite that the base is approximately 200 to 4,000 m. As someone who is not well versed in meteorology, I do not know if this is 200 to 4,000 m from sea level or just above the ground. So I thought I would ask here from someone who explain and provide a primary source.

2 Comments
2023/09/05
00:51 UTC

1

Micro climates / temperature variation in Wundermap

When I look at private weather stations linked to Weather Underground on the Wundermap, I'll see 3 to 5 degree differences in temperature where censors are less than 1 mile apart.

what causes such a large difference in temperature? Is it geography because maybe one sensor is in an area that gets less sunlight each day and that difference compounds over time? Sort of like the urban heat phenomenon, where cities are warmer at night because the asphalt roads and steel buildings radiate heat long after the sun sets whereas a mile away I suppose it'd be much cooler if it was 50% green space.

Or do you assume that for a 5 degree difference and less than a mile apart, one of the sensors is either miscalibrated or is not completely in the shade?

6 Comments
2023/09/01
06:41 UTC

1

What are these called if not Hurricanes?

So this is a snapshot from today as you can see Idalia is in the bottom left and franklin to the right, but that big depression has almost the same wind speed and 3 times the size, but not recognized by the NHC.

Is it just a very active low pressure zone?

I've seen a couple but never known what to call them.

2 Comments
2023/08/31
21:04 UTC

1

is this accurate? Or even possible?

0 Comments
2023/08/03
04:18 UTC

3

Is this accurate? Or even possible?

1 Comment
2023/08/03
04:18 UTC

2

Early morning lightning show

I was driving into work about 4:30 this morning and saw an incredible lightning display that lasted the entire 15 minute drive. About one flash every 3 seconds, and they were all confined to a relatively small area of the sky to the northeast. Almost looked like all the lightning was contained in a single cloud or group of clouds. I've heard of intracloud lightning before, but never seen anything like this. About 20 strikes per minute sustained for possibly much longer than my 15 minute commute. I heard no thunder. I live in Madison, Wisconsin, USA. I searched for a name for this phenomenon but didn't find anything specifically like what I saw. Any ideas?

0 Comments
2023/07/20
22:26 UTC

3

rainbow cloud? My phone does not do it justice, these colors were bright but it was the only one around. What causes it?

2 Comments
2023/06/23
18:54 UTC

1

How Lake Tulare affect the weather?

How will the reemergence of Lake Tulare in the Central valley affect the weather?

0 Comments
2023/05/21
01:16 UTC

1

Crosspost - Looking for footage of a 1967 Ames, Iowa tornado…

0 Comments
2023/05/15
17:39 UTC

1

What is this type of cloud and what would cause it to form?

The clouds around it were all really flat and this one particular cloud was extending past all of the others.

0 Comments
2023/04/30
02:23 UTC

0

Why is the forecast so inaccurate?

All the weather apps I’m looking at (weather channel, windy, accuweather, the weather network) all say at this moment in my location it is pissing rain yet it’s actually dry and sunny.

2 Comments
2023/04/09
17:46 UTC

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