Aikyam-Lab/Synoptic-Bench huggingface dataset:
Simultaneously, a long wave upper level trough will move across the Midwest driving a cold front south and through the FA later this morning. During the latter part of the day large scale ascent from the upper level trough will combine with lift from the front and increased moisture levels to markedly increase precip chances across our southern zones, with a northern precip. Morning models and profiles keep things on the warmer side than the past few days. As a result ground temperatures will likely be warmer than previously expected leading to very light accumulations.
655 AM EST Mon Dec 9 2019 A low pressure system will race northeast into Lower Michigan this morning, then into Canada later today. Rain will spread over the area today followed by lake effect snow tonight as a cold front moves east.
Simultaneously, a long way upper level trough will move across the Midwest driving a cold front south and through the FA later this morning. During the latter part of the day large scale ascent from the upper level trough will combine with lift from the front and increased moisture levels to markedly increase precip. Morning models and profiles keep things on the warmer side than the past few days. As a result ground temperatures will likely be warmer than previously expected leading to very light accumulations.
Another cold front and associated upper system will bring cold air and the potential for precipitation, beginning this afternoon and continue overnight. However, bridges and overpasses may have icy patches.
Ahead of the front, warmer temperatures in the middle to upper 50s will be found along and south of Interstate 44 through the late morning hours. However, high pressure building into the region will allow for plenty of sunshine and calm winds.
Today: Primary forecast concern in the near short term are wind gusts behind the cold front that will pass through the area this morning. The fog will not be widespread and will be erased by the dry air associated with the cold front.
315 AM CST Mon Dec 9 2019 Today-tonight: Leading wind shift with cold front should be in the vicinity of KICT around daybreak and push through southeast KS this morning. Given very light winds, clear skies and dew points in the teens, went with the cooler guidance despite the westerly component, thinking radiational cooling will be the predominate factor on low temperatures.
A cold front is pushing south across all three sites this morning with winds turning to the north. The surface cold front is currently draped across northeastern Colorado through the northwestern Kansas and southwestern Nebraska border and across southeastern Nebraska. Temperatures will remain steady through most of the morning hours as daytime heating brings temperatures a few degrees warmer around noon, but will remain below the temperatures reached after midnight this morning. Tuesday through Monday An upper trough will track east away from the Panhandles Tuesday as an upper ridge builds in from the west around the middle of the week.
If warm air doesn't start reaching the sfc, the area cold wet-bulb below freezing, resulting in freezing rain. A strong jet will round the base of that trough later today, which will enhance lift and promote higher rain rates. And with the sfc warm front lifting north of the area, warm moist advection will persist ahead of the cold front, with well above normal temperature expected and PWATs above the 90 percentile for this time of year. Showers overnight will be driven by the crossing cold front. By Tuesday afternoon, the cold front will be well to the southeast of the region. These areas would be the focus for any accumulations, particularly over the higher elevations.
328 AM PST Mon Dec 9 2019 A ridge of high pressure will build over the area through Tuesday, with dense fog likely in the San Joaquin Valley overnight and into the mornings.
Showers overnight will be driven by the crossing cold front. By Tuesday afternoon, the cold front will be well to the southeast of the region. These areas would be the focus for any accumulations, particularly over the higher elevations.
/issued 313 AM CST Mon Dec 9 2019/ Overnight temperatures have warmed a bit as strong warm advection pumps a warmer, moist airmass across the Midsouth. A strong cold front will move across the region overnight.
417 AM MST Mon Dec 9 2019 Upper level analysis has trof axis swinging through the Dakotas at the moment with ridging along the West Coast. Temperatures at 3am across the forecast area have fallen into the single digits and teens, with 20s holding out across the higher elevations of the Black Hills. Winds will drop off a little this morning, but return to breezy levels by the afternoon as a weak surface trof slides across the Dakotas.
an upper level trough and associated cold front remain on track to move through the area from around midnight tonight through mid morning Monday. Low temperatures tonight range from the low 20s in the northwest to the mid/upper 20s far east through south. High temperatures Monday in the low to upper 30s. upper ridging is advertised to be slowly approaching the area ahead of a trough approaching the west coast. Dry conditions are expected with high temperatures in the low to mid 40s.
A cold front will move across the region later this afternoon and evening bringing a wind shift out of the northwest and then northeast overnight. Another cold front and associated upper system will bring cold air and the potential for precipitation, beginning this afternoon and continue overnight. However, bridges and overpasses may have icy patches.
Precipitation and mid level trough continues to roll east across the eastern CWA with rapid weakening in the James valley. With the high being off to the southeast, winds likely won't completely settle down and some cloud cover is possible.
Fair and warmer weather is expected this week as higher pressure and weak offshore flow take hold of the region. WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO Showers continue early this morning along the southern OC and western San Diego County, along with the high desert. Get ready for some dry and warmer weather this upcoming week. A weak high pressure ridge will build today and amplify into Tuesday.
Patchy freezing fog is also possible during the next two mornings, with isolated areas near bodies of water seeing patchy dense fog.
308 AM CST Mon Dec 9 2019 A strong cold front will continue to move eastward across the region this morning, bringing light snow and gusty winds.
The elevated winds responsible for the warming temperatures are also serving to hold fog density in check with the lowest visibilities observed so far this morning being 5 miles. The high temperature forecast for tomorrow is very low confidence as it is predicated on the exact timing of the frontal passage.
Today-tonight: Leading wind shift with cold front should be in the vicinity of KICT around daybreak and push through southeast KS this morning. Given very light winds, clear skies and dew points in the teens, went with the cooler guidance despite the westerly component, thinking radiational cooling will be the predominate factor on low temperatures.
320 AM PST Mon Dec 9 2019 High pressure builds over the region on today, which will lead to a period of dry conditions and near average temperatures early this week.
914 AM EST Mon Dec 9 2019 Warm air advection is taking place as the 12Z sounding from KTBW showed veering winds with height in the lowest 200-250mb of the atmosphere.
405 AM EST Mon Dec 9 2019 A low pressure system will race northeast into Lower Michigan this morning, then into Canada later today. Rain will spread over the area today followed by lake effect snow tonight as a cold front moves east.
This morning, broad cyclonic flow was ongoing aloft over the eastern CONUS with an embedded mid-level trough moving over the Northern Plains. A weaker embedded wave upstream was detected on water vapor imagery with an attendant cold front analyzed in central Saskatchewan. Amid northwest flow aloft, this cold front should arrive in our northwest counties around the noon hour and move east/southeast through the afternoon. While skies have cleared for much of western/central North Dakota behind the previous system, clouds are expected to increase again with this next cold front.
521 AM CST Mon Dec 9 2019 A strong cold front will continue to move eastward across the region this morning, bringing light snow and gusty winds.
314 AM MST Mon Dec 9 2019 The upper trough axis swings east of the region today with the overall pattern shifting to the east through the middle of the week. This will bring northwest flow aloft and upper short wave ridging to the the region Tuesday and Tuesday night.
Will see MVFR ceilings return as the cold front approaches this evening. /ISSUED 1000 AM CST Mon Dec 9 2019/ Expect breaks in the cloud cover today that should allow temps to reach the lower 80s inland, especially across central and southwest areas.
This will be aided by a building lee-side trough along the Front Range. With NW flow aloft as an amplified ridge builds to our west, the area will be looking at a slow warming trend thru the short term. While there will be no appreciable wx over the next 36+ hours, the transition of the ridge across eastern portions of the CWA could bring about a brief period of low cloud and/or fog after 10z Tuesday. For temps, highs in the low to mid 40s on Tuesday as a result of the SW flow over the region.
1052 AM CST Mon Dec 9 2019 A strong cold front will continue to move eastward across the region this morning, bringing light snow and gusty winds.
Issued by National Weather Service Midland/Odessa TX 1120 AM CST Mon Dec 9 2019 A cold front has brought gusty north winds to the TAF sites this morning but these will subside by 00Z and slowly veer around from the south and southwest by 12Z. The surface cold front is currently draped across northeastern Colorado through the northwestern Kansas and southwestern Nebraska border and across southeastern Nebraska. Temperatures will remain steady through most of the morning hours as daytime heating brings temperatures a few degrees warmer around noon, but will remain below the temperatures reached after midnight this morning. Tuesday through Monday An upper trough will track east away from the Panhandles Tuesday as an upper ridge builds in from the west around the middle of the week.
Warm southwest winds will push temperatures into the lower 80s Tuesday afternoon with record highs possible.
Gusty winds can be expected areawide through 10/12z ahead of an approaching cold front. Gusts should keep below lake wind criteria as long as the low cloud deck limits mixing, but any breaks this afternoon could boost speeds in deep E TX and Toledo bend country. The cold front is crossing the OK/TX panhandles now and will spread over OK all morning. We could see and inch or two fall, but we will keep above freezing so not seeing any impacts at this time. Now that is not to say a burst could affect a county or two on bridges or overpasses before lunchtime in I-30 corridor.
At the surface, a cold front was pushing through the area with low clouds, light fog and drizzle occurring near the front as it moves through. Cold front will push through the area by this evening with gusty northwest winds continuing into the mid to late evening before diminishing after midnight. The main upper trough will swing through the area on Tuesday and temperatures will be cold on Tuesday with cold air advection continuing and highs will only reach the upper 30s to low 40s.
1142 AM CST Mon Dec 9 2019 As expected, a strong cold front has been surging south across the plains during the pre-dawn hours, bringing a wind shift to the north/northwest. and the precip will be winding down pretty quickly this morning as the mid level trough axis passes to the east.
1236 PM CST Mon Dec 9 2019 Today-tonight: Leading wind shift with cold front should be in the vicinity of KICT around daybreak and push through southeast KS this morning. Given very light winds, clear skies and dew points in the teens, went with the cooler guidance despite the westerly component, thinking radiational cooling will be the predominate factor on low temperatures.
Cold air advects in behind the cold front and high pressure builds into the region.
This next shot of cold air will probably produce some light snow across the region as lift interacts with the low level dendritic growth zone, but coverage should only be isolated to scattered. Windchill values remain mostly warmer than -25F over the forecast area through Tuesday.
1242 PM EST Mon Dec 9 2019 A low pressure system will race northeast into Lower Michigan this morning, then into Canada later today. Rain will spread over the area today followed by lake effect snow tonight as a cold front moves east.
Ridge continues a trek ESE into the Plains region and still expect a W to E tapering of the strongest gusts thru the afternoon hours. The upper trough axis swings east of the region today with the overall pattern shifting to the east through the middle of the week. This will bring northwest flow aloft and upper short wave ridging to the the region Tuesday and Tuesday night.
226 PM EST Mon Dec 9 2019 Mild temperatures and areas of light rain will continue into this evening in advance of a cold front. Gusty winds and much colder air will filter in behind this cold front tonight into Tuesday, with temperatures on Tuesday steady in the mid 20s to low 30s.
Low clouds cover much of the lowlands this morning but should break up in the afternoon.
1053 AM MST Mon Dec 9 2019 Upper level analysis has trof axis swinging through the Dakotas at the moment with ridging along the West Coast. Temperatures at 3am across the forecast area have fallen into the single digits and teens, with 20s holding out across the higher elevations of the Black Hills. Winds will drop off a little this morning, but return to breezy levels by the afternoon as a weak surface trof slides across the Dakotas.
Lows are expected down into the mid/upper teens(F) to the lower/mid 20s(F). Temperatures will rebound Tuesday as a weak lee side trough of low pressure develops in eastern Colorado, setting up light southwesterlies across southwest Kansas. This will draw warmer air into the area pushing H85 temperatures up well above 0C. Should see highs up into the 40s(F) Tuesday afternoon with temperatures pushing the lower 50s(F) near and along the Oklahoma border.
Meanwhile, a cold front was located across eastern and southern Texas. However, the fly in the ointment is just how far south a sub- freezing airmass will advance tonight. Model soundings are showing a weak (0-1 deg C) warm nose at 850mb above the subfreezing layer for much of the Big Country after midnight. Although low temperatures are expected to fall to around freezing, the ground temperatures should still be several degrees above this mark, so accumulation should be minimal. The usual spots, such as bridges and overpasses, and even locations higher in elevation may see some locally higher accumulation. High temperatures will remain in the low to mid 40s for most locations, due to the abundant cloud- cover and the wet ground.
Also, the lower levels around Dyess AFB are starting to fill in with light showers. Another cold front and associated upper system will bring cold air and the potential for precipitation, beginning this afternoon and continue overnight. However, bridges and overpasses may have icy patches.
A cold front will move through all sites this afternoon with a period of sfc gusts between 20-30kts across the NE OK and NW AR sites. Fog that was occurring earlier had dissipated as a cold front moves into northeast OK. Current forecast overall in decent shape, however have made tweaks to temperature trends based on cold front progression.
207 PM CST Mon Dec 9 2019 A cold front's passage later today into this evening will lead to a big change in airmass, as highs today near or in the 60s plummet a good 30 degrees tomorrow. Little change off the blend occurs otherwise, as the models are fairly straightforward with the development of a Gulf Coastal trof that places us to the north of the main impact/pcpn field heading into the weekend.
1019 AM EST Mon Dec 9 2019 Ridge extending across central Florida will keep a low level southerly flow across the area today, leading to warmer than normal temps with highs in the low 80s this afternoon. Ridge extending across the local Atlantic waters will keep winds generally out of the south to southeast, with speeds less than 15 knots.
1000 AM CST Mon Dec 9 2019 Expect breaks in the cloud cover today that should allow temps to reach the lower 80s inland, especially across central and southwest areas.
941 AM PST Mon Dec 9 2019 Fog and low clouds with dry weather are expected for today and Tuesday under a ridge of high pressure.
Freezing fog across the Yakima and Kittas Valleys may create areas of slickness on roadways, especially bridges and overpasses. With an upper level ridge parked over the area tonight, areas of fog will once again develop and may become dense.
Upper air analysis this morning showed nearly zonal flow across Texas and a trough over the southwest US. At the surface, there was a cold front moving into North Texas. The cold front will be on our northern border at the start of this period and move through our CWA tonight. Temperatures will drop below freezing across much of the northern part of the CWA mainly along and north of I-35/Hwy 90.
Brief look at a couple of 12Z model runs show current forecast timing of the cold front on track, making it to the coast around 12Z Tuesday. By tonight, MVFR cigs and potentially some vis restrictions will redevelop ahead of a cold front.
Fog that was occurring earlier had dissipated as a cold front moves into northeast OK. Current forecast overall in decent shape, however have made tweaks to temperature trends based on cold front progression.
258 PM CST Mon Dec 9 2019 A cold front moved southward across the area this morning, leaving a chillier airmass in its wake.
800 AM PST Mon Dec 9 2019 Fog and low clouds with dry weather are expected for today and Tuesday under a ridge of high pressure.
A few places along the high terrain still have some low clouds in but expect this to quickly break up through the morning. A trough of low pressure will swing by to the south this afternoon. Low pressure is centered over southeastern California and is pushing a cold front across north- central Arizona. The low has moved further southwest than previously anticipated, which has resulted in precipitation developing further south and west along the Colorado River. Isolated to scattered light showers will remain possible through the daytime as the cold front moves through the area, but the latest trends are pointing toward less coverage of showers.
Mild road surface temps will gradually lower to subfreezing values as this colder airmass takes hold overnight.
A ridge of high pressure moving over the west today and Tuesday will usher in a dry weather pattern that will hold for our region through the work week. No significant weather concerns as light to moderate north winds occur today as a ridge of high pressure moves in from the West Coast. Immediately following the exit of this low pressure system to the south today will be high amplitude ridge moving over the west coast which will serve to dry out the region with northerly flow initially today and Tuesday.
Gusts should keep below lake wind criteria as long as the low cloud deck limits mixing, but any breaks this afternoon could boost speeds in deep E TX and Toledo bend country. The cold front is crossing the OK/TX panhandles now and will spread over OK all morning. We could see and inch or two fall, but we will keep above freezing so not seeing any impacts at this time. Now that is not to say a burst could affect a county or two on bridges or overpasses before lunchtime in I-30 corridor.
This afternoon still looks dry for most areas as we await the arrival of the cold front tonight. Gusty winds will continue across the higher terrain through the day. Big wind shift tomorrow morning at all sites as the cold front moves through. Chattanooga Airport, TN 57 59 34 48 31 / 80 90 80 10 10 Knoxville McGhee Tyson Airport, TN 57 58 33 45 28 / 80 90 80 10 0 Oak Ridge, TN 54 56 31 45 28 / 80 90 80 10 0 Tri Cities Airport, TN 55 55 32 42 24 / 80 90 80 20 0 TN.
200 PM MST Mon Dec 9 2019 Broad upper trough encompassed much of CONUS with northwesterly flow aloft over the CWA. Cold front that pushed through the area last night extended from the Mid-MS Valley to the Southern Plains. The leading edge of colder air was entering northern MT/ND, and will push southeast through the High Plains tonight.
134 PM MST Mon Dec 9 2019 Slightly warmer, yet still below normal, temperatures will be found today. Higher pressure will begin to build into the area Tuesday, bringing drier and slightly warmer conditions to the region through mid week.
By tomorrow afternoon the system will have passed into Central Texas and colder, drier air will quickly fill in behind the cold front.
Expect the cold front will reach COT area around 07Z, VCT/LRD 08Z/09Z, and ALI/CRP at 11Z Tuesday. Brief look at a couple of 12Z model runs show current forecast timing of the cold front on track, making it to the coast around 12Z Tuesday. By tonight, MVFR cigs and potentially some vis restrictions will redevelop ahead of a cold front.
1012 AM PST Mon Dec 9 2019 Fog and low clouds with dry weather are expected for today and Tuesday under a ridge of high pressure.
905 AM PST Mon Dec 9 2019 Fair and warmer weather is expected this week as high pressure and weak offshore flow take hold of the region. The rest of the week will feature upper level high pressure dominating, which means dry weather and warmer temperatures, especially late this work week. Still, SoCal will get our fill of sunshine and warmer temps this week, allowing some green up after the nice rainfall we have seen over the past several weeks! Showers continue early this morning along the southern OC and western San Diego County, along with the high desert. Get ready for some dry and warmer weather this upcoming week. A weak high pressure ridge will build today and amplify into Tuesday.
Our attention now turns to the cold high pressure settling in behind the departing front.
Slightly warmer, yet still below normal, temperatures will be found today. Higher pressure will begin to build into the area Tuesday, bringing drier and slightly warmer conditions to the region through mid week.
Arctic high pressure will take the region to 15 to 20 below zero lows Wed morning, with corresponding wind chill/apparent temp values from 30 to 35 below. Light blowing snow across this area is also possible due to stronger, northwesterly winds associated with a cold frontal passage.
Will see a wind shift Tuesday morning as a cold front pushes through.
The lift with the jet streak overnight will just be in the shallow moisture layer at mid levels beneath the developing inversion, so the low PoPs for continued scattered light showers over the mountains should be sufficient. Flow aloft is marginal for high winds, but we'll probably see 60-70 mph gusts in the windiest spots above timberline in the Front Range, and 40-60 mph gusts down into the higher foothills for a few hours around sunrise. After that there's a decrease in the low level flow and also more shear. Forecast lows tonight look good, with colder air in the valley bottoms of the plains cold pool and warmer readings around the edges.
after midnight CST tonight) have decreased significantly due to the southward progression of the cold front. By tomorrow afternoon the system will have passed into Central Texas and colder, drier air will quickly fill in behind the cold front.