Aikyam-Lab/Synoptic-Bench huggingface dataset:
Clouds will advect back into our area tonight as upper level divergence increases ahead of an approaching and deepening upper level trough moving eastward into the Plains. GKS Rain will spread across the CWA on Wednesday as the aforementioned disturbance continues developing into a mature low pressure system as it progresses eastward. The low's track is slightly farther north compared to 24hrs ago and therefore the axis of QPF for our area has also shifted slightly northward. The placement and track of the low would still keep the most unstable air out of the CWA.
408 AM EDT Tue May 2 2017 A strong, but rather slow moving cold front will push east across the Commonwealth early today. The front will usher in quite strong and gusty west to southwest winds and cooler air for Today.
200 AM EDT Tue May 2 2017 Dry and cool air mass until an upper low brings unsettled and much cooler weather to end the work week. Cooler, but overall drier weather to start the short term period, with high pressure briefly in control.
Dry conditions, mostly clear skies, and generally light winds will develop throughout the week as high pressure builds over the Southwest.
444 AM EDT Tue May 2 2017 Dry and cool air mass until an upper low brings unsettled and much cooler weather to end the work week. Also, clouds will be on the increase as a warm front approaches.
324 AM EDT Tue May 2 2017 A dry pressure ridge west and south of the forecast area will extend through the area Wednesday. A warm front will develop in the region Wednesday night ahead of low pressure and an associated cold front.
323 AM EDT Tue May 2 2017 Dry and cool air mass until an upper low brings unsettled and much cooler weather to end the work week. Also, clouds will be on the increase as a warm front approaches.
Winds at the northern sites will swing back and forth between northerly and easterly as a weak cold front pushes through in the next few hours. A cold front will begin moving into northern sections of the forecast area later Tuesday, then push through the remainder of the region Tuesday evening and night.
The next low pressure system will develop over the Plains on Wednesday and deepen as it moves east into the Mississippi Valley Wednesday night.
It will be about 10 degrees warmer and not quite as windy as the storm system to our north moves ne and further away from our area.
543 AM EDT Tue May 2 2017 The center of high pressure will build over the region tonight and will linger into the mid week, providing dry weather through Wednesday night.
1056 PM PDT Mon May 1 2017 As a weak weather system exits overnight, high pressure will build over the region starting Tuesday.
Tonight Through Wednesday Satellite imagery indicates low clouds across northern Arkansas, associated with a large upper low approaching the Great Lakes, are continuing to move away from state.
Rain chances will be coming later tonight from the southwest, and overspreading the entire area Wednesday as a deepening trof advances east across the plains.
417 AM EDT Tue May 2 2017 A strong, but rather slow moving cold front will push east across the Commonwealth early today. The front will usher in quite strong and gusty west to southwest winds and cooler air for Today.
Temperatures are in the lower 40s over all the plains with very weak surface winds in place. Models have zonal flow aloft today with an upper trough developing just upstream of the CWA. The main thing is the moisture and the energy from the upper trough.
Strong high pressure will then build over the region through the rest of the week.
A weak quasi-stationary front just north of KCDS may sag into KCDS late Tuesday; A stronger cold front will move into all airports just beyond the end of this TAF. Mid-level PVA intensifies Wednesday stretched from the northern Texas Panhandle into southern Oklahoma, as the associated trough deepens and moves east-southeast. Northerly winds behind the front will remain elevated most of the day Wednesday, reinforced by tail end of jet max rounding its way around the deepening trough to our east.
140 AM EDT Tue May 2 2017 A strong low pressure system over the northern Great Lakes will move slowly northeast across southeast Canada today, continuing to cause windy and cool conditions in our area with scattered showers. High pressure will move across the Great Lakes tonight and Wednesday providing fair weather with lows in the 30s.
1245 AM CDT Tue May 2 2017 Deep upper low over eastern Wisconsin this evening continues to move away from central Illinois. Deep 993 mb low with upper level closed low vertically stacked in SW Wisconsin will continue to move ENE over the upcoming day. The cold pool combined with upper level disturbances wrapping cyclonically around the upper low will keep scattered showers around the area until near midnight along/north of I-74, while isolated to scattered showers extend southward through much of the area for late afternoon/early evening. Cooler temperatures and frost should be absent due to the persistent pressure gradient keeping breezy WSW winds 10-20 mph through the night.
The cold front is now to the east and near the Atlantic Seaboard. Current water vapor imagery and RAP upper air analysis indicate a deep closed low slowly progressing northeastward across the Great Lakes. A broad area of low pressure exists at the surface under this low. This continued mixing and wrap around cloud cover will keep temperatures a few degrees warmer than previously thought this morning. Regardless, temperatures are still noticeably cooler than the last couple of mornings.
An upper trough is expected to dive southeast out of the Pacific Northwest and quickly strengthen as it moves into the Southern Plains on Wednesday. An isolated tornado threat will be a possibility especially along the warm front, which could act to locally enhanced low level shear profiles. A linear complex is expected to develop along the cold front Wednesday afternoon and evening.
Forecast lows in the lower to middle 30s should result in fairly widespread frost, so issued a Frost Advisory.
356 AM EDT Tue May 2 2017 The center of high pressure will build over the region tonight and will linger into the mid week, providing dry weather through Wednesday night.
622 AM EDT Tue May 2 2017 A dry pressure ridge west and south of the forecast area will extend through the area Wednesday. A warm front will develop in the region Wednesday night ahead of low pressure and an associated cold front.
More Rainfall and Flooding Concerns Late Tonight Through High pressure over the region this morning will begin to slowly lift out of the area through the day today. As the the storm system develops and moves across northern Texas a warm front will begin to lift northward across Arkansas. The warm front will begin to move into the Ozarks later tonight around or just before Midnight.
High pressure builds back over the west coast on Wednesday which will advect warmer air into the region and bring widespread sunshine.
347 AM CDT Tue May 2 2017 Low level ridging builds in today under generally zonal flow aloft. Westerly flow with the cooler airmass from yesterday's frontal passage will keep the region noticeably cooler and dryer. The approaching trough and system will bring increased cloud cover and rain chances.
350 AM EDT Tue May 2 2017 A cold front approaching from the eastern Great Lakes will bring a brief period of moderate to heavy rainfall this evening into the overnight hours, along with isolated thunderstorms. Mostly cloudy skies and isolated to scattered light rain showers will occur on Tuesday and Wednesday, as a trailing upper level low moves eastward across the North Country.
519 AM EDT Tue May 2 2017 A strong low pressure system over the northern Great Lakes will move slowly northeast across southeast Canada today, continuing to cause windy and cool conditions in our area with scattered showers. High pressure will move across the Great Lakes tonight and Wednesday providing fair weather with lows in the 30s.
147 AM EDT Tue May 2 2017 A cold front approaching from the eastern Great Lakes will bring a brief period of moderate to heavy rainfall this evening into the overnight hours, along with isolated thunderstorms. Mostly cloudy skies and isolated to scattered light rain showers will occur on Tuesday and Wednesday, as a trailing upper level low moves eastward across the North Country.
401 AM CDT Tue May 2 2017 Main upper level ridge was located off the West Coast. Upper ridge will move east and build over the western US. Eastern part of the ridge will shift into the forecast area and will shut down the mid level instability by Thu morning. Water vapor loop indicated a short wave trough over western ND. Cold front/wind shift will move through Wed and produce showers/isolated thunder.
Cooler weather with showers possible towards the end of the week into the weekend. Other than a few high clouds spilling over the eastern Pacific ridge into NorCal, skies are clear across the region. Current temperatures generally range from the mid 30s to mid 40s in the mountain valleys to the 50s and 60s elsewhere, though the milder spots in the Central Valley and foothills are still hanging onto the lower 70s. Temperatures will continue to be well above average over the next several days as the strong ridge moves across the area.
639 AM EDT Tue May 2 2017 Dry and cool air mass until an upper low brings unsettled and much cooler weather to end the work week. Also, clouds will be on the increase as a warm front approaches.
304 AM CDT Tue May 2 2017 More seasonal spring pattern returns to the region during the period as deep upper low that brought snow to some areas yesterday continues to track toward eastern Canada. Increasing chance of showers and a few thunderstorms will develop during the day Wednesday as a weak cold front moves through the area in association with the upper wave. Showers diminish and end Wednesday evening as the upper wave moves east of the area followed by increasing heights as system tracks into the lower Mississippi Valley.
1207 AM CDT Tue May 2 2017 Departing low pressure will bring very gradually clearing skies this evening, and perhaps a quick uptick in wind gusts before decreasing diurnally around sunset. This low will be a bit faster to eject eastward but then will deepen and wrap into a cut-off low during the latter half of the work week, potentially providing another round of significant rainfall.
127 AM EDT Tue May 2 2017 A cold front will move offshore this evening.
314 AM CDT Tue May 2 2017 High pressure will remain located along the Gulf Coast today. As a result, SFC winds will be out of the WSW which will allow temperatures to be 10-13 degrees warmer than yesterday. A warm front will begin lifting northward this evening across the Mid-South. Expect generally dry conditions Wednesday morning across the entire Mid-South as the warm front pushes north into Southern Missouri. Since the majority of Wednesday will be dry, expect temperatures to warm into the lower to mid 80s for areas southeast of a line from Clarksdale, Mississippi to Memphis to Jackson, Tennessee.
319 AM EDT Tue May 2 2017 A dry pressure ridge west and south of the forecast area will extend through the area Wednesday. A warm front will develop in the region Wednesday night ahead of low pressure and an associated cold front.
618 AM EDT Tue May 2 2017 A dry pressure ridge west and south of the forecast area will extend through the area Wednesday. A warm front will develop in the region Wednesday night ahead of low pressure and an associated cold front.
Upper low over the western Great Lakes with ridge in the eastern Pacific.
147 AM EDT Tue May 2 2017 Strong low pressure over the nations midsection will lift out across the Great Lakes tonight and Tuesday. high pressure will briefly build in for Wednesday. Another strong low pressure system will move from the Mississippi Valley to the Ohio Valley late in the week. Forecast highs at the low end of guidance (or lower) with highs mostly in the lower 50s. High pressure will build east on Wednesday. Deepening trough will spawn low pressure from the southern plains which will track northeast.
325 AM EDT Tue May 2 2017 Weak high pressure will build into central NC today, and linger overhead on Wednesday.
319 AM CDT Tue May 2 2017 An upper level short wave trough currently over the northwestern US will sharpen over the Rockies today and tonight along with a strengthening upper level jet. At the same time, a cold front will be moving through which will be completely through the FA by daybreak on Wednesday morning. Strong upper level ridging will then build in through the early part of the weekend. Part of the upper level low, currently in the Gulf of Alaska, will break off and dig into southern California by late in the weekend. It will form a pseudo rex block with the low remaining nearly stationary for several days. This low will draw back Gulf of Mexico moisture into West Texas representing a classic dryline pattern.
/issued 940 PM CDT Mon May 1 2017/ High pressure at the sfc and dry wnwly flow aloft will result in clear skies overnight and min temperatures in the 50s for most sites. The overall outcome is that we will likely see some slightly warmer min temps than previously fcst over E TX, as the winds will act to hold them up a little longer.
657 AM EDT Tue May 2 2017 The center of high pressure will build over the region tonight and will linger into the mid week, providing dry weather through Wednesday night.
251 AM EDT Tue May 2 2017 Showers and storms associated with a cold front will finally move out of the area overnight. Much cooler air with scattered showers will be across the area Tuesday and Wednesday. In the southeast low level clouds have been slow to erode today keeping it much cooler and also more stable. Colder air slow to move in the lows in the low and mid 50s.
355 AM EDT Tue May 2 2017 An approaching trough of low pressure will produce occasional showers today with temperatures mainly in the 50s to lower 60s.
Cooler weather with showers possible towards the end of the week into the weekend. High temperatures topped out upwards of 15 degrees above normal today with readings reaching into the lower 90s in the warmest areas of the Central Valley. AMS continues to warm Tuesday as upper ridging amplifies and axis shifts over the CWA. Highs Tuesday expected to be several degrees warmer with lower to mid 90s in the Central Valley. PCH High pressure will continue to build across the region through Wednesday. As ridge builds, daytime highs will top out some 12 to 19 degrees normal by Wednesday with 90s in the Valley, 70s-80s in the foothills, and 50s-60s in the mountains. Overnight temperatures will be fairly mild as well and may stay above freezing in the higher elevations, increasing runoff from snow melt.
644 AM EDT Tue May 2 2017 A strong low pressure system over the northern Great Lakes will move slowly northeast across southeast Canada today, continuing to cause windy and cool conditions in our area with scattered showers. High pressure will move across the Great Lakes tonight and Wednesday providing fair weather with lows in the 30s.
The front will usher in brisk west to northwest winds and cooler air for Tuesday. Fair weather will occur Wednesday under a weak ridge of high pressure.
An upper low will deepen, move out of the Rockies and into the Central Plains tomorrow. This low will push a cold front into the area tomorrow bringing a return of cooler temperatures. The low track will be too far north to give us rain chances so unfortunately this will be a dry frontal passage.
The high pressure in the western North Atlantic will continue to push eastward as a weakening front sags across Florida today. A mid level ridge should relax only a small bit today, so a slight chance of measurable precipitation is still an agreeable advertisement.
241 AM MST Tue Feb 6 2018 High pressure moved through Northeast Montana overnight giving most of the region bitter cold temperatures under clear skies. The high will move to the east this morning and a weak frontal system will move through the forecast area today. Another high pressure system will bring partly cloudy skies to the northeast half of the forecast area tonight.
1122 PM CST Mon Feb 5 2018 Warm front will be approaching the coast and moving inland late tonight and Tuesday. A near-coastal warm front will work its way northward and into the southern 2/3rds of the forecast area through tomorrow afternoon. Gentle upglide drizzle or periods of light rain/showers along and ahead of the warm front. Warm and moist air moving over cooler shelf waters will produce early evening marine fog and to subsequently advect inland. Many interior counties can expect low ceilings and patchy fog with intermittent light precipitation north of the warm frontal boundary. A cooler surface per easterly flow and overcast will really thwart any surface- based storms. A near 12k freezing level/10k wet bulb zero height suggests that.
Other than the cold, the main forecast concerns are some intermittent snow which has been sprouting up in some of the cold air advection regime - very reminiscent to lake effect snow bands, but more of a differential instability issue with the bright sky cover, cold temps, and flow around a weak area of low pressure. The upper low over Hudson Bay will continue to pull cold Arctic air into the northland. The GFS digs the upper trof into the Pacific northwest late in the week faster and deeper than the ECMWF, which results in a more Pacific flow. GFS is warmer than ECMWF in the warm up, and will generally side with the more conservative ECMWF. With high pressure nearby, expect VFR through the forecast. An upper level trof will drop southeast from Canada into the region late in the forecast.
1216 AM EST Tue Feb 6 2018 A weak but dry cold front will cross the area later today. A complex area of low pressure and associated frontal boundaries will cross the Mid Atlantic region Wednesday, with the trailing cold front crossing the area Wednesday night.
The upper level flow will remain northwest behind this system which will allow another short wave trough to come out of the central Canadian Rockies and move across the region for Tuesday night into Wednesday morning.
Upstream wave is producing lightning around Provo and that feature along with a jet streak rounding the trough axis at the 4 Corners should bring a period of decent snowfall rates to the Southern Mountains. Scattered snow showers have picked up with daytime heating today across northwestern Colorado in narrow bands of convection just ahead of an approaching trough. The trough advecting colder air into the region will pass northwest to southeast through eastern UT and western Colorado tonight and into Tuesday morning. As the trough passes through late tonight, a band of precipitation is expected to develop south of I-70 and as far south as the northern San Juans. With this trough's convective nature, brief whiteout conditions will be possible through Tuesday morning where heavier showers pass through. The atmosphere stabilizes Tuesday evening leaving cooler northwesterly flow in place.
319 AM EST Tue Feb 6 2018 A cold front will push east through the region today followed by high pressure overnight. Low pressure will move from the Ohio Valley to near southeastern Massachusetts Wednesday before heading out to sea Wednesday night. This low has the potential to bring a heavy snowfall to our region on Wednesday.
352 AM EST Tue Feb 6 2018 High pressure will slide offshore today. Another cold front will move through Wednesday night with high pressure building into the region for late week. Yet another cold front will cross the area during the latter part of the weekend. High pressure along the Carolina coast this morning will gradually slide offshore later today. Model time sections shows increased moisture in the low-level tonight as the flow becomes more S/SW. This will lead to a milder night as clouds increase after midnight, holding minimum temperatures in the low to mid 40s. A cold front push through late Wednesday night bringing rain to crosses the region, and then a wet pattern this weekend.
An old dissipating frontal boundary/trough currently across the coastal waters expected to lift further northward today. The best chances of showers and thunderstorms on Wednesday with the next cold frontal passage.
1125 PM CST Mon Feb 5 2018 Latest surface analysis and satellite imagery shows a 1030mb high pressure centered over south central North Dakota.
Tuesday night into Wednesday morning, an elongated area of low pressure along a frontal zone to our south will produce additional light precipitation across the area, some of it as snow and some possibly as light freezing rain.
341 AM CST Tue Feb 6 2018 A cold front is currently plunging southward into the CWA with gusty northeast winds behind it. Cold temperatures will be present tonight behind the front along with a slight chance of rain and/or freezing drizzle. High temperatures mostly in the 50s are expected on Wednesday with a broad upper trough passing over the eastern half of the country.
/issued 333 PM EST Mon Feb 5 2018/ High pressure will build and be in control of the pattern for the majority of the week.
High pressure over the eastern Pacific will continue to result in dry weather conditions across the region through the forecast period.
With the passage of a cold front temperatures are currently ranging from the mid 20s to the lower 30s. which are off from earlier daytime highs in some spots west that reached the 40s to the lower 50s. region will increased precipitation working from west to east over the area as an upper low moves off the central Rockies. This combined with upslope ENE winds overnight from surface ridging building south into the Plains. 20S will prevail with eastern locales coldest in the lower 20s.
1239 AM EST Tue Feb 6 2018 High pressure will build in from the west tonight and slide offshore Tuesday. A cold front will move through midweek followed by high pressure late week. Another cold front will move into the region over the weekend. Skies are clear with high pressure along the Carolina coast.
For 06Z Aviation discussion below Clearing taking place across eastern MN as the trough exits the region. High pressure builds across the area tonight and should provide a mostly clear sky and decreasing winds.
Low temps tonight will be near to slightly above seasonal, but cooler than on recent nights.
324 AM CST Tue Feb 6 2018 An upper trough over the Great Basin region will approach the Panhandles today as a moist upslope northeast to east surface flow prevails. Surface dew points currently in the low to mid teens but should continue to climb into the upper teens to lower 20s today. Expect some light snow flurries or possibly some light freezing drizzle may develop this morning by 18Z across mainly the western and central portions of the Panhandles. Expanded the area of freezing drizzle or snow flurries westward today and removed any wintry precip tonight as decreasing cloudiness expected across all of the forecast area by sunset or shortly after sunset this evening.
If the clouds hang longer, that will keep temps a little warmer than expected. A ridge of high pressure will then move into the region and bring cold yet sunny conditions along with it overnight into Tuesday. The models do hint at an inverted trough extending into srn WI.
If the 00Z NAM is correct temperatures may actually struggle to climb above the freezing mark over the Rolling Plains Tuesday afternoon. Otherwise, shallow moisture and isentropic upglide could support pockets of light precipitation (most likely drizzle and/or freezing drizzle) Tuesday into Tuesday evening. Given that temperatures may hang close to freezing all day out east, we have added FZDZ to the DZ mention there.
High pressure northeast of the waters will keep a southeasterly wind flow in place through Wednesday, with an afternoon sea breeze turning winds onshore at the coast.
At the surface, arctic high pressure resides across the western Dakotas. Arctic high pressure will shift south and east of the forecast area, with winds switching around to the south, and bringing in slightly warmer air into the area tomorrow.