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2018/19 Winter Banter and General Discussion - We winter of YORE


Baroclinic Zone
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20 minutes ago, weatherwiz said:

Are there any good model products for forecasting or assisting with forecasting fog? On Ryan Maue's site he has a visibility product, but there has to be something which gives like fog probabilities or something. 

HRRR has probabilities of certain VIS, same with SREF. Otherwise you're probably limited to looking at forecast soundings.

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1 minute ago, OceanStWx said:

HRRR has probabilities of certain VIS, same with SREF. Otherwise you're probably limited to looking at forecast soundings.

I mean in the end looking at soundings is the best way to go for fog forecasting. Tough though when you're focusing on a large geographic region (but I guess could just look at the visibility products and narrow things down). 

Is there any sort of documentation which describes the fog tab in bufkit? It seems pretty straight forward, but I'm just uncertain how to interpret the graphs...like the bottom left where it has air/ground temp (when playing with the numbers negative values seem to correlate to fog being more likely) and the bottom right (MRi and displacement/dispersal product I don't fully understand)  

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1 minute ago, weatherwiz said:

I mean in the end looking at soundings is the best way to go for fog forecasting. Tough though when you're focusing on a large geographic region (but I guess could just look at the visibility products and narrow things down). 

Is there any sort of documentation which describes the fog tab in bufkit? It seems pretty straight forward, but I'm just uncertain how to interpret the graphs...like the bottom left where it has air/ground temp (when playing with the numbers negative values seem to correlate to fog being more likely) and the bottom right (MRi and displacement/dispersal product I don't fully understand)  

https://training.weather.gov/wdtd/tools/BUFKIT/training/UB_Fog/UB_Fog.html

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You're looking at two different things there. The XOver is using the UPS crossover technique, where if your temps fall below the minimum dewpoint for the day fog is more likely. The MRi is modified Richardson number (think mechanical mixing). If it is high enough the atmosphere is stable, if it is low or negative the atmosphere is too unstable and wind will likely mix fog out.

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1 minute ago, OceanStWx said:

You're looking at two different things there. The XOver is using the UPS crossover technique, where if your temps fall below the minimum dewpoint for the day fog is more likely. The MRi is modified Richardson number (think mechanical mixing). If it is high enough the atmosphere is stable, if it is low or negative the atmosphere is too unstable and wind will likely mix fog out.

Thank you! I knew it had to be easy to understand :lol: 

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7 minutes ago, OceanStWx said:

That will be far more useful for valley fog type events (assuming you select a valley location Bufkit site) vs model probabilities for low VIS that can't resolve the valley in enough detail.

That makes sense...I was gauging this is more useful for radiation fog as opposed to advection-type fog. 

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Received an email from AccuWeather today that due to "resource constraints", effective today they have made the decision to retire their Forums.  As of today, December 18, 2018, you may no longer post or send private messages in the Forums. I haven't posted anything there for years, so I don't know if their activity has decreased.

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16 hours ago, 78Blizzard said:

Received an email from AccuWeather today that due to "resource constraints", effective today they have made the decision to retire their Forums.  As of today, December 18, 2018, you may no longer post or send private messages in the Forums. I haven't posted anything there for years, so I don't know if their activity has decreased.

Wow.  While I have never looked at it much, it was pretty huge...

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Just now, weatherwiz said:

That will be pretty great haha. I just have to gather the required information. I probably won’t get my diploma for a few months, but I could supply the transcript and degree works which will show completion 

I feel like youve been here so long and everyone knows you, i feel like you should just get a Red Tag 

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2 hours ago, weatherwiz said:

That will be pretty great haha. I just have to gather the required information. I probably won’t get my diploma for a few months, but I could supply the transcript and degree works which will show completion 

They should just give you the damn tag. Also, congrats. Like I told you before. Earning an education while working full time/ close to it is not easy and deserves to be recognized.

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