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Found 9 results

  1. As we enter the new year and new decade, time to make a new thread. Happy New Year!
  2. Meteorological spring starts a day late this year. Astronomical spring never does. Welcome to March. Roller coaster weather is not too far off.
  3. Rough draft of a possible improved climate classification system...partially adapted from M. Fantamon. All temperatures reflect the mean (average of diurnal high and low). When considering a climate classification, choose the best fit if multiple classifications exist. Temperature conditional, precipitation conditional If bold the condition applies to the entire climate group (ie tropical climates). Equatorial (A) coldest month > 22cannual amplitude <= 5cannual precip >= 2000 mm, wettest month less than 2x wetter than driest month equatorial rainforest (Ar)annual precip >= 1000 mm, wettest month greater than 2x wetter than driest month equatorial gradient (Ag)annual temp >= 25c hot (a) < 25c warm (b*)Tropical (B*) coldest month > 18cannual amplitude <= 12cannual precip < 800 mm & no month > 80 mm tropical semi-arid (Bq)annual precip < 1250 mm tropical dry (Bd)annual precip < 1500 mm & dry winter/summer, wettest month at least 3x wetter than driest month tropical savanna - dry winter (Bw), dry summer (Bs)annual precip >= 1250 mm, wettest month less than 2x wetter than driest month tropical humid/maritime (Bm)annual precip >= 1500 mm, wettest month >= 400 mm, wettest month at least 4x wetter than driest month tropical monsoon (Bn)warmest month >= 30c desert (a) >= 25c warm (b*)Subtropical (C*) coldest month between 5c and 18cat least eight (8) months >= 10cwarmest month >= 22cannual precip <= 150 mm, no month > 20 mm subtropical arid/desert (Co)annual precip 150-400 mm, no month > 50 mm subtropical semi-arid (Cq)annual precip > 150 mm, total precip < 100 mm over at least three (3) month period, driest month <= 30 mm, wettest month at least 2x wetter than driest month Mediterranean (dry summer) (Cs), subtropical dry winter (Cw)annual precip >= 800 mm, no month < 30 mm, at least one (1) month >= 100 mm subtropical humid (Cr)annual precip >= 1000 mm, wettest month less than 2x wetter than driest month subtropical maritime (Cm)annual temp >= 20c tropical limit / hot desert (a) 15-20c very warm (b*) < 15c warm temperate (c*)Temperate (D) at least four (4) months >= 10cannual temp >= 3ccoldest month <= 0c, annual precip <= 125 mm, no month > 20 mm temperate cold desert (Do)coldest month <= 0c, annual precip 125-400 mm, no month > 50 mm temperate cold semi-arid (Dn)coldest month > 0c, annual precip 125-400 mm, no month > 50 mm temperate semi-arid (Dq)coldest month <= 0c, annual amplitude >= 20c temperate continental (Dc)coldest month <= 5c, annual amplitude >= 15c temperate semi-continental (Dt)annual amplitude 10-15c temperate maritime (Dm)annual amplitude < 10c temperate oceanic (Dr)annual temp >= 10c warm (a), 5-10c mild (b*), < 5c cold (c*)annual precip < 800 mm dry (d), > 800 mm humid (h)wettest month at least 3x wetter than driest month - dry summer (s), dry winter (w)Subpolar (E) at least one month >= 10ccoldest month <= 0c, warmest month < 12c subpolar oceanic (Er)coldest month <= -7c, annual amplitude < 20c subpolar maritime (Em)coldest month <= -30c subpolar cold winter (Eq)annual amplitude >= 20c subpolar continental (Ec)annual temp >= 3c temperate (a), >= -7c cold (b*), < -7c frigid (c*)annual precip < 400 mm dry (d), >= 400 mm humid (h)Polar (F) no month >= 10cat least three (3) months <= 0cannual temp <= 0c polar ice sheet (Fo)annual amplitude < 20c polar oceanic (Fr)annual amplitude >= 20c polar continental (Fc) Comments and feedback welcome.
  4. Wow! 2018 just flew by just like that and only 6 days until 2019. Hopefully we see a wetter January-April period with plenty of rain and snow up in the mountains.
  5. Time for the summer forecast contest, as we hope to see summer arrive some time this year in what's been the coolest and wettest May in decades for California and pretty much all of the Southwest Predict the monthly anomalies for June, July, and August, at these locations: You've got until Monday, June 3 to make your guesses SEA (Seattle, WA) OLM (Olympia, WA) PDX (Portland, OR) CQT (Downtown LA) DEN (Denver, CO) DCA (Washington D.C.)
  6. Looking at climate through the lens of degree days (base 65 F US, 64 F/18 C INTL) Cooling degree days occur any time the mean temperature of the day is more than 65 F/18C. Heating degree days occur any time the mean temperature of the day is less than 65 F/18C. A good way to measure climates is to look at the mean HDDs and CDDs during a typical year. We can also sum the two to get an idea of how relatively comfortable a climate is, and how much energy is required in that climate to heat and cool a building through a typical year. Hottest locations in the world by CDD: Mecca, Saudi Arabia 8,176 (hands-down the #1 hottest large city in the world) Khartoum, Sudan 7,833 (hottest national capital) Bangkok, Thailand 6,680 Singapore 6,192 Manila, Philippines 6,027 Jakarta, Indonesia 5,905 Manaus, Brazil 5,861 Mumbai, India 5,756 Recife, Brazil 5,718 Dubai, UAE 5,702 Death Valley, CA, USA 5,600 (hottest location in USA, uninhabited) Lagos, Nigeria 5,577 San Juan, PR, USA 5,588 (hottest large city in USA) Key West, FL, USA 4,825 (hottest in mainland USA) Phoenix, AZ, USA 4,620 (hottest US city with metro >1 million pop) Coldest locations in the world by HDD, isolated outposts like Eureka, Canada not included: Verkhoyansk, Russia 21,322 (coldest city with > 1,000 pop in world) Barrow, AK, Alaska, USA 19,428 (coldest in USA) Noril'sk, Russia 18,307 (coldest city with > 100,000 pop) Yakutsk, Russia 17,788 Iqaluit, Canada 18,211 (coldest over 1,000 pop in Canada) Churchill, MB, Canada 16,322 Yellowknife, NT, Canada 14,861 Fairbanks, AK, USA 13,531 Ulaanbaatar, Mongolia 12,537 Leadville, CO, USA 10,877 (coldest town in lower 48 USA) Novosibirsk, Russia 10,650 (coldest metro > 1 million pop) Winnipeg, MB, Canada 10,400 Edmonton, AB, Canada 10,274 International Falls, MN, USA 10,080 Moscow, Russia 9,168 Minneapolis, MN, USA 7,574 (coldest metro > 1 million pop in USA) Least amount of HDD, CDD, Total Uruapan, Mexico 276, 429, 755 (most "agreeable" climate in world in terms of temperature?) Huambo, Angola 429, 364, 793 Guatemala City, Guatemala 62, 749, 811 Nairobi, Kenya 155, 742, 897 (most "agreeable" major city in world?) Mexico City, Mexico 954, 122, 1,076 Cochabamba, Bolivia 934, 153, 1,087 Addis Ababa, Ethiopia 1189, 0, 1,189 Iquique, Chile 766, 677, 1,443 San Diego, CA, USA 1166, 802, 1,968 (most "agreeable" major city in US?) Degree days are all based on degrees Fahrenheit
  7. Olympia averages 50.00" of precipitation a year while Seattle averages 37.49" a year. What causes the differences in precipitation amounts between Olympia and Seattle?
  8. Hi Everyone. Here is a place where we can discuss the latest weather blogs from our favourite Pacific Northwest meteorologists. We can also create a big aggregate list of our favourite blog sources, so chime in if you find a worthy, undiscovered weather blogger. Cliff Mass' Latest post showed a beautiful NAEFS Diagram for a prediction of the Super Bowl. Great informative post about ensemble forecasting highlighting just how far we can accurately predict weather. EDIT: The Master Blog List: Brett Anderson: Canadian Accuweather Blog Capital Weather Gang: Washington D.C. Cliff Mass: Seattle and the Pacific Northwest Jeff Masters: Weather Underground Mark Nelsen: Portland Weather Scott Sistek: Komo 4 Wolf Reid: Professor at UBC
  9. Hey! I am new here so I thought I would introduce myself I am Remy Mermelstein, in 10th grade at Irvington High School in NY just north of NYC. I have always been interested in weather, and did many reports on different weather topics back in elementary school. Back at the end of 8th grade I made my own Facebook Blog where I post forecasts almost every day, and other weather discussions, homemade maps and model data, the FB page is called Weather Or Not in the Rivertowns with Remy Mermelstein, it can be found at this link: https://www.facebook.com/remyweatherchannel Halfway through freshman year (last year) my good friend joined me on the FB page, and we then started an identical blog WeatherInTheHud with Remy & Dillon which can be found at weatherinthehud.blogspot.com We post the same things as on the FB page here, but for people who do not have FB. You can sign up with an email to get the updates by email as well This year we are both doing the Science Research program at my school, and consequently are working together on research regarding Teleconnections and Oscillations/Ocean Circulations and other major patterns and how they influence smaller local patterns and ultimately the everyday sensible weather. Our theory is that if we can foresee and predict the major and biggest patterns and know as many effects/causes they have on other smaller patterns then we can be in a much better place to forecast everyday weather. We are also using this to study climate change from both sides of the argument (AGW..etc). We have been lucky enough to be working with Joe D'Aleo as our mentor and much of the amazing team at Weatherbell Analytics since November, which has been absolutely amazing. Anyway, just wanted to say hi, this forum looks mighty fine Sorry if I posted this in the wrong forum
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