Welcome to November 30th! Don't stop giving thanks now. An infinite number of reasons to be thankful to be living in the best time of human history.......every day of the year!
Scroll down and enjoy the latest comprehensive weather to the max...... occurring because of the natural physical laws in our atmosphere as life on this greening planet continues to enjoy the best weather/climate in at least 1,000 years(the last time that it was this warm) with the added bonus of extra beneficial CO2.
Much warmer temps vs the forecasts for the previous week have crushed ng. No signs of major cold returning for a long while on Friday really put on the selling pressure.
Latest (low skill) week 3-4 forecast at the the bottom........mostly mild thru the rest of the year.
Winter storm in progress with HIGH WINDS and heavy snow!
Winter Weather Forecasts
Snowfall the next 7 days below.
Here are the latest hazards across the country.
Purple/Pink/blue on land is cold/Winter weather. Brown is wind, Green is flooding. Gray is fog. Reddish is a red flag advisory.
Go to the link below, then hit the location/county on the map for details.
https://www.spc.noaa.gov/ Go to "hazards"
Current Weather Map
|NCEP Days 0-7 Forecast Loop||NCEP Short-Range Model Discussion||NCEP Day 3-7 Discussion|
Current Jet Stream
|Low Temperatures Tomorrow Morning|
Highs today and tomorrow.
Highs for days 3-7:
Minor Fluctuations around average.
Temperatures vs average for days 3-7.
Extremes diminish..........closer to average. Mild Plains.
Weather features day 3-7:
Intense wind bag storm with heavy snow exits in the Northeast on Monday, then quiet next week.
Liquid equivalent precip forecasts for the next 7 days are below.
Some is heavy snow in the cold sector/far north in the current Winter Storm. Mostly dry next week.
Day 1 below:
Day 2 below:
Day 3 below
Days 4-5 below:
Days 6-7 below:
7 Day Total precipitation below:
Severe Storm Risk the next 8 days:
|Current Day 1 Outlook|| Forecaster: Grams/Leitman|
Valid: 30/1300Z - 31/1200Z
Forecast Risk of Severe Storms: Marginal Risk
| Current Day 2 Outlook|| Forecaster: Mosier|
Valid: 31/1200Z - 01/1200Z
Forecast Risk of Severe Storms: No Svr Tstms
| Current Day 3 Outlook|| Forecaster: Mosier|
Valid: 01/1200Z - 02/1200Z
Forecast Risk of Severe Storms: No Svr Tstms
| Current Day 4-8 Outlook|
Last 24 hour precip top map
Last 7 day precip below that
Current Dew Points
Latest radar loop
| (3400x1700 pixels - 2.2mb)|
Go to: Most Recent Image
Go to: Most Recent Image
You can go to this link to see precipitation totals from recent time periods:
Go to precipitation, then scroll down to pick a time frame. Hit states to get the borders to see locations better. Under products, you can hit "observed" or "Percent of normal"
These maps sometimes take a day to catch up to incorporate the latest data(the bottom map is only updated once a week).
Drought Monitor maps:
Latest: The first map below is the latest. The 2nd one is from last week.
In july/August/Sept/Oct, it's typical to see some increase in drought because of evaporation, seasonally exceeding low rainfall during those months. However, this year saw a HUGE increase in the Southeast!
November 28: DROUGHT the last 2 months has really shrunk. One area to watch is sw Kansas for the Winter wheat crop.
The maps below are updated on Thursdays.
The top map is the Canadian ensemble average, the maps below are the individual members that make up the average at the end of week 2.
Each member is like the parent, Canadian model operational model.......with a slight tweek/variation in parameters. Since we know the equations to represent the physics of the atmosphere in the models are not perfect, its useful to vary some of the equations that are uncertain(can make a difference) to see if it effects the outcome and how.
The average of all these variations(ensembles) often yields a better tool for forecasting. It's always more consistent. The individual operational model, like each individual ensemble member can vary greatly from run to run.........and represent an extreme end of the spectrum at times. The ensemble average of all the members, because it averages the extremes.............from opposite ends of the spectrum.........changes much less from run to run.
End of week 2....................0z Canadian ensembles:
Updated 12z maps available this late...........turning colder late week 2 vs previous solutions. Potential for another polar vortex incursion south...on some solutions, mainly this particular model!
Sunday: Way, way more zonal and mild the past 2 days!!!!
Monday: Other models are more zonal and milder today......but the Canadian model is back to amplifying the pattern at the end of 2 weeks, so this model is colder.
Tuesday: Back to more zonal/mild, west to east steering currents today.
Thursday: Some members getting much colder late week 2
Friday: Zonal, mild west to east flow. Pretty strong agreement.
Saturday: No change from yesterday.
360h GZ 500 forecast valid on Dec 15, 2019 00 UTC
Forecasts for the control (GEM 0) and the 20 ensemble members (global model not available)
0Z GFS(American model) Ensembles at 2 weeks:
GFS Ensemble mean(average of all the individual solutions above). The first map is a mid/upper level map. The 2nd one is a temperatures map at around 1 mile above the surface. These are anomalies(difference compared to average).
NCEP Ensemble t = 360 hour forecast
Friday: Much more powerful upper ridge/west, trough east couplet associated with a potential Stratospheric warming event(in the same area as the yellows on this map that show the greatest positive anonalies in the troposphere) that could displace the polar vortex pretty far south. Potenial! Where is goes and if it happens still uncertain but this would bring frigid air into large parts of the US........if it happens.
Sunday: Not nearly as amplified or as the very cold solutions from last Friday but still the moderately cold ridge/west, trough east couplet. ....on this model and this run at 2 weeks.
Monday: The GFS ensemble is much milder and more zonal today. Just weak anomalies.
Tuesday: Slight positive anomaly West and slight negative anomaly Northeast.
Friday: Mild flow. No cold air connection. Especially mild West to middle of the country.
Latest, updated graph/forecast for AO and NAO here, including an explanation of how to interpret them...............mainly where they stand at the end of 2 weeks.
Previous analysis, with the latest day at the bottom for late week 2 period.
Discussions, starting with a week ago.
Wednesday: Models overnight were colder
Thursday: AO and NAO closer to zero and not as cold. PNA also near zero.
Friday: Extreme spread in the AO today. Some are actually positive for the first time in awhile, while most are solidly negative and favorable for cold to move from high latitudes to mid latitudes but there is extremely high uncertainty. It can end up being very mild from just small changes vs intense cold. NAO slight negative...but a few are positive, PNA neutral. Enormous risk with temperature forecasts in the late week 2 period. Small changes can mean a 40 degree flip in the temperature.
Saturday: AO forecast to be a bit positive at the end of 2 weeks for the first time in quite awhile......less favorable for cold. NAO and PNA close to zero. Milder than Friday.
Sunday: Huge AO changes. Many members go very strongly positive which lessens cold air outbreak probabilities. However, some are still negative, so an incredible spread and uncertainty. NAO increasing from low values to a tad above 0.........also lessening cold risks at 2 weeks. PNA near 0. Cold risk after the first week in December have decreased.
Monday: Very positive AO decreases chances for cold from high latitudes moving to the middle latitudes. NAO moving to slightly positive is also a potential mild indicator. PNA close to zero but dropping a bit late.
Tuesday: AO spikes extremely positive, then comes back down towards zero in week 2. NAO slightly positive, PNA near zero.
Friday: Very Positive AO and NAO mean mild temps/no cold air delivery from the north. Dropping late week 2 but still positive. PNA decreases from positive to just below 0 late.
Saturday. Positive AO but a change from yesterday late week 2 as it plunges. Mainly from several members fairly negative. The actual pattern still favor +AO regime. NAO is also positive/mild but drop towards 0 at the end of 2 weeks. PNA slightly positive. Overall, at least well into week 2, indicators are favorable for mild temps.