Aikyam-Lab/Synoptic-Bench huggingface dataset:
An approaching cold front will lead to windy conditions this afternoon and evening. As the cold front moves into the state, there will also be showers with the chance for a few thunderstorms through early Tuesday morning. Some light snow is possible at the higher elevations as the precipitation ends. Fair and warmer weather returns for the end of the work week. A quick-moving trough and associated cold front will impact northern AZ today and into early Tuesday. A cooler day can anticipated behind the front on Tuesday.
A dry cold front will move through our region Monday resulting in cooler weather along with breezy conditions.
A breezy southerly flow will exist across the area today, between high pressure centered offshore the mid-Atlantic coast and frontal boundary moving eastward across the Gulf. The combination of this moisture and warmer than normal sfc temps, in the mid-upper 80s will produce sufficient instability to produce scattered showers and thunderstorms into the afternoon.
Showers appear likely over NW/N OK thru most of the day, with the possibility of a few strong to severe storms east of I35 accompanying convergence along a cold front. Also, it appears the cold front will enter the I44 a little earlier than what was anticipated yesterday. Skies should clear rather quickly though allowing for some warmup during the day into the lower 60s for most locations. This weekend also appears warm under the influence of a mid to upper ridge axis and westerly downslope flow.
Main upper ridge azis in the Pacific along 130W this morning moving east. One last short wave trough sliding southward through our eastern zones in Idaho with light snow or flurries in the central ID mountains today. On Tuesday the upper ridge axis will be in eastern Oregon. Tuesday will be 3-5 dagrees warmer than today. Upper level ridge axis begins to shift east as the next Pacific storm system approaches the Northwest.
621 AM EDT Mon Apr 3 2017 After a quiet day today, low pressure will spread showers into NY and PA early this evening. The 500mb ridge moves east of the I-81 corridor around 0z this evening, increasing the chance for showers to move in from the southwest. The best lift occurs during the day Tuesday as a fast moving warm front shoots northeastward across NY state. The NAM, Canadian Regional, and GFS all agree on the fast movement, which seems quite unusual for a warm front in this area. This instability quickly fizzles out in the late afternoon after the warm front departs.
Upstream dewpoints in the upper 60s to lower 70s was observed across the central and southern Louisiana which was associated with a northward moving warm frontal boundary. As far as temperatures are concern lows will be in the 60s and highs on Monday will be in the middle 70s to the lower 80s.
Monday and Tuesday will feature cooler than average nights with mild daytime temperatures.
317 AM CDT Mon Apr 3 2017 Water vapor imagery shows upper low tracking across south central OK and quickly pushing east. Should see some dense fog this morning, primarily along the western flank of our forecast area as some cooler low level air starts to filter-in. Western edge of showers will gradually start to dissipate as the upper low quickly lifts off to the northeast. Even through there will be plenty of sun Thu as high pressure moves in, temps will still be slightly below normal. Upper ridging will then setup over the Plains for Fri into Sat which will allow temps to finally feel more spring-like.
313 AM EDT Mon Apr 3 2017 Strong surface and upper level low pressure today and tonight.
356 AM EDT Mon Apr 3 2017 Low pressure over Arkansas will move northeast and track across lower Michigan tonight and into Quebec late Tuesday. High pressure will slide across the Ohio Valley Tuesday night. Low pressure will track into the Lower Lakes by mid week and linger into the weekend. Much better chance of showers this afternoon as low pressure over Arkansas. think afternoon highs will push into the lower to mid 60s. Much better chance of more widespread showers tonight as the low tracks across lower Michigan. The low will track into Quebec by Tuesday evening taking the rain showers with it. A quick respite Tuesday night as high pressure tracks across the Ohio Valley. Models continue to track slow moving low across the Lower Great Lakes the later half of the work week.
300 AM EDT Mon Apr 3 2017 Rain will develop Monday and continue through Monday night as low pressure tracks through the region.
The trof will likely contain a negative tilt, which will enhance mid level difluence/upward motion. Bubble high pressure will then make a brief visit behind the system later tonight and Tuesday.
533 AM EDT Mon Apr 3 2017 Low pressure tracking to our northwest will bring rain chances from this afternoon into Tuesday.
Daytime highs tomorrow will be noticeably cooler for locations north of I-70; between 5 and 10 degrees cooler from this afternoon's highs. Tomorrow afternoon a more substantial upper level trough will work its way through the area, bringing with it the potential for significant mountain snowfall and valley rain. As the upper level trough lifts into the Plains, substantial subsidence will occur with strong, dry northwesterly flow setting up in the trough's wake. Tuesday night will be on the chilly side with many locations dropping below freezing for the first time in several weeks.
428 AM EDT Mon Apr 3 2017 After a quiet day today, low pressure will spread showers into NY and PA early this evening. The 500mb ridge moves east of the I-81 corridor around 0z this evening, increasing the chance for showers to move in from the southwest. The best lift occurs during the day Tuesday as a fast moving warm front shoots northeastward across NY state. The NAM, Canadian Regional, and GFS all agree on the fast movement, which seems quite unusual for a warm front in this area. This instability quickly fizzles out in the late afternoon after the warm front departs.
346 AM CDT Mon Apr 3 2017 The upper low that brought rain to the area yesterday has moved east with high pressure briefly building in from the west. The next upper trough diving across NV today will move across NM and the TX Panhandle Tuesday. Upper ridge will build in after that with conditions warming and drying. A cold front will sag into the area Tuesday and then blow through the rest of the area Tuesday night.
High pressure will maintain VFR conditions today and through much of tonight. Potent upper low continues to shift east and northeast with a ridge building across TX.
Cooler air will filter into the area behind this second wave on breezy north winds Monday afternoon. Easterly flow could keep Laramie out of the precip until the flow turns more NNW Monday afternoon as the low to the south pulls away. Temperatures should be below freezing during the event so even with light amounts, slick roads could be an issue along I-80 west of Cheyenne.
Dry weather will return today and Tuesday as an upper level ridge moves over the region.
SHORT TERM (Now through Tuesday): Quieter conditions during the next 36 hours as the H5 trough sweeps east, being replaced with a weak ridge.
Rain will increase in coverage today, as deep low pressure lifts northeast toward the area. There does seem to be agreement that we will see an enhanced precip area over or just west of our western forecast area, lined up along the inverted h8 trough stretching across western Wisconsin. In general, look for about 1/2 to 1 inch of rain through tonight, with the highest amounts in the southeast.
Cold front trailing the departing low pushes into NE OK tonight with light precip possibly spreading north of the boundary early Tuesday. This wave will quickly drop southeastward and strengthen becoming a closed low over the Southern Rockies early Tuesday.
447 AM EDT Mon Apr 3 2017 High pressure will move off the east coast today paving the way for increasing clouds ahead of a storm system that will move into the lower Great Lakes tonight.
614 AM EDT Mon Apr 3 2017 Low pressure over Arkansas will move northeast and track across lower Michigan tonight and into Quebec late Tuesday. High pressure will slide across the Ohio Valley Tuesday night. Low pressure will track into the Lower Lakes by mid week and linger into the weekend. Much better chance of showers this afternoon as low pressure over Arkansas. think afternoon highs will push into the lower to mid 60s. Much better chance of more widespread showers tonight as the low tracks across lower Michigan. The low will track into Quebec by Tuesday evening taking the rain showers with it. A quick respite Tuesday night as high pressure tracks across the Ohio Valley. Models continue to track slow moving low across the Lower Great Lakes the later half of the work week.
337 AM MDT Mon Apr 3 2017 A low pressure system continues to carve its way southward into the Northern Rockies this morning, bringing upslope snowfall to the Glacier National Park Region and Seeley/Swan/Mission Ranges. As this low tracks southward today, showers will continue for north-central Idaho and Camas Prairie where upslope is favored in this pattern.
340 AM PDT Mon Apr 3 2017 A low pressure system will move southeastward through the Great Basin today with strong gusty west winds in the mountains and deserts in the afternoon and evening.
/issued 209 PM CDT Sun Apr 2 2017/ An upper low over west Texas this afternoon will continue eastward tonight taking precipitation and cloud cover with it. Will mention the potential for high winds and critical fire weather conditions in the Hazardous weather Outlook for now, especially since models have vacillated lately on the amplitude of the ua trough. A cold front will drop south through the region Tuesday night in the wake of the fast moving short ua trough, which could add to fire weather concerns with the abrupt wind shift from west to north behind the front, and the expected wind speeds prior to, and after, frontal passage.
These waves will cross the area and Monday as an upper trough redevelops across the Four Corners region late Monday into Monday night. Models continue to show a track that keeps the low and associated precip south of the CWA, although some areas may see a little light precip. Highs will be in the 40s and 50s Tuesday, then drier weather and a warming trend are expected as an upper ridge builds over the region. Rain will be mixed with snow or completely change to snow over the higher elevations of northeast Wyoming and the Black Hills with IFR/LIFR conditions at times through Monday morning.
404 AM EDT Mon Apr 3 2017 Low pressure tracking to our northwest will bring rain chances from this afternoon into Tuesday.
mainly clear skies for the entire region with temperatures ranging in the upper 40s into the lower 50s. Temperatures will only be slightly cooler behind the front Monday afternoon, with highs ranging from the middle 50s in Colorado to the middle 60s in central Kansas.
A nearly stacked low pressure system will lift northeast across the Ozarks region today. Otherwise expect increasing westerly winds at the surface as the low pressure system tracks to the northeast.
649 AM EDT Mon Apr 3 2017 Rain will develop today and then spread across the region tonight as low pressure tracks over the area.
359 AM EDT Mon Apr 3 2017 High pressure will become centered over the region today with warmer than normal temperatures. Another low pressure system will move south of the area on Tuesday. A surface and upper ridge axis of high pressure moves across the region today allowing mostly sunny skies and above normal temperatures. Another upper trof takes a very similar path as the last system tracking east across the Ohio valley and then redeveloping a secondary low center over Cape Cod Tuesday. Snow will be ongoing across the interior Tuesday evening and Tuesday night as low pressure passes to the south.
131 AM EDT Mon Apr 3 2017 High pressure slides east tonight.
Potent upper low continues to shift east and northeast with a ridge building across TX.
The lower MVFR ceilings and visibility will linger through the afternoon and potentially into the early evening, before returning to VFR conditions after 00z.
122 AM EDT Mon Apr 3 2017 High pressure will be slow to move out of the region, yielding dry conditions into the early half of Monday. A series of crossing low pressure areas will thereafter keep periodic rain chances in the forecast for the upcoming work week. CL Temperatures near 10 degrees above normal are expected Monday as this continues as WAA continues with rain chances increasing mid-afternoon through the night as low pressure tracks towards the Great Lakes. Showers should taper off later Tuesday as the upper trough exits and the low pulls a cold front through the area.
Trough will slowly exit today and tonight, mainly affecting the Idaho-Wyoming border region as far south as Bear Lake. By Tue afternoon the upper level low will have left, and an upper level ridge develops over the northern Great Basin.
518 AM EDT Mon Apr 3 2017 High pressure will move off the east coast today paving the way for increasing clouds ahead of a storm system that will move into the lower Great Lakes tonight.
506 AM EDT Mon Apr 3 2017 Low pressure tracking to our northwest will bring rain chances from this afternoon into Tuesday.
426 AM EDT WED APR 20 2016 HIGH PRESSURE WILL PROVIDE PLEASANT SPRING WEATHER THROUGH THURSDAY MORNING.
505 AM CDT WED APR 20 2016 ANOTHER WET MORNING ON TAP AS THE COMBINATION OF THE UPPER LEVEL LOW BACK TO THE NORTHWEST AND A FRONTAL BOUNDARY DRAPED OVER NORTH TEXAS HAS PRODUCED A SQUALL LINE THAT IS MOVING TOWARDS SOUTHEAST TEXAS.
Upper ridge axis begins to push east of the region today as closed upper low slowly moves into the eastern Plains/upper Midwest. High temperatures are expected to be inhibited a bit by mid level cloud cover, however we should still be able to find our way to the low 80s in most spots. Closed upper low opens up into a positive tilt trough as it moves through the upper Midwest tonight and Thursday. This will result in milder overnight lows in the low 60s. The smaller diurnalrange continues into Thursday as highs only rise around 10 degrees to the low 70s.
PRECIPITATION CHANCES INCREASE FOR SECOND HALF OF THE WEEK WITH AN UPPER LEVEL LOW/COLD FRONT. HIGH PRESSURE FOR THE WEEKEND. THE RIDGE IS FINALLY BRAKING DOWN AS THE UPPER LEVEL LOW OVER THE CENTRAL PLAINS MOVES EASTWARD AND WILL OPEN UP INTO AN OPEN WAVE. WARM FRONT WILL LIFT NORTH ACROSS THE REGION WEDNESDAY NIGHT INTO THURSDAY. WITH A WARMER. AS LOW PRESSURE LIFTS NORTHEAST INTO THE GREAT LAKES REGION.
110 AM EDT WED APR 20 2016 HIGH PRESSURE IS MOVING INTO THE REGION WITH DRIER AND COOLER AIR TAKING OVER. HIGH PRESSURE WILL REMAIN IN CONTROL THROUGH WEDNESDAY WITH THE NEXT POSSIBLE RAIN CHANCES ON THURSDAY. TEMPS OVERNIGHT WILL DROP INTO THE LOWER TO MID 30S. HIGH PRESSURE BOTH AT THE SURFACE AND ALOFT WILL CONTROL THE REGION THROUGH THE DAY WITH CLEAR TO MOSTLY CLEAR SKIES AND TEMPS PUSHING INTO THE UPPER 50S TO LOWER 60S.
WATER VAPOR IMAGERY SHOWS HIGH PRESSURE CENTERED OVERHEAD WITH A LARGE NEARLY STATIONARY UPPER LOW CENTERED OVER THE ROCKIES AND A SMALLER UPPER LOW OFF THE NORTHERN CALIFORNIA COAST. THE UPPER LOW OFF OF NORTHERN CALIFORNIA IS SENDING MOISTURE. PERHAPS 2-4 DEGREES WARMER THAN LAST NIGHT WITH MID 40S TO LOWER 50S IN THE LOWER ELEVATIONS AND IN THE 30S AND LOWER 40S IN THE MOUNTAINS AND CENTRAL OREGON. HIGH PRESSURE WILL KEEP SKIES MAINLY CLEAR TONIGHT AND TOMORROW MORNING THOUGH HIGH LEVEL MOISTURE FROM A DISTURBANCE TO OUR SOUTH WILL SEND SCATTERED CIRRUS OVER KRDM AND KBDN TONIGHT AND SPREAD TO KDLS/KYKM TOMORROW AFTERNOON. DUE TO THE LOW PROBABILITY OF ONE PASSING OVER A TAF SITE, HAVE LIMITED MENTION TO VCTS FROM 21Z-03Z AT KRDM AND KBDN AND FROM 23Z-04Z AT KDLS.
1236 AM CDT WED APR 20 2016 THE SHORT TERM PERIODS WILL FEATURE CLOUDY CONDITIONS WITH PERIODS OF RAIN UNDER THE INFLUENCE OF AN UPPER CYCLONE WHICH ENCOMPASSES MUCH OF THE INTERIOR CONUS. THE CENTER OF THE UPPER LOW WAS LOCATED IN EAST CENTRAL COLORADO EARLY THIS AFTN WITH A LEAD WAVE LIFTING OUT OF THE SYSTEM ACROSS KS INTO NEB. TEMPS WILL BE MILDER WHERE DRIER CONDITIONS AND A FEW BREAKS IN CLOUD SHLD ALLOW READINGS TO REACH THE LOW/MID 60S. THE UPPER LEVEL LOW THAT HAS BEEN AFFECTING THE AREA FOR THE PAST FEW DAYS WILL BE EAST OF THE AREA WEDNESDAY NIGHT. MODELS HAVE SOME DIFFERENCES IN THE LOCATION OF THE UPPER LOW AND HOW MUCH PRECIPITATION MOVES IN FROM THE NORTH DURING THE NIGHT.
634 AM EDT WED APR 20 2016 HIGH PRESSURE WILL KEEP THE AREA DRY FOR ONE MORE DAY. LOW PRESSURE WILL TRACK FROM THE MIDWEST ACROSS THE CENTRAL LAKES AND TO ONTARIO CANADA.
331 AM EDT WED APR 20 2016 HIGH PRESSURE WILL BUILD ACROSS THE REGION TODAY THROUGH THURSDAY.
An upper level low is over the Great Plains/Upper Midwest with mostly westerly flow over the CWA. As the upper low/trough moves eastward, a cold front will push southward across West Texas tonight. Temperatures are expected to be slightly cooler on Thursday behind the front with a chance of thunderstorms across the Permian Basin and Lower Trans Pecos.
117 AM EDT WED APR 20 2016 HIGH PRESSURE MOVES ACROSS THE REGION TODAY. THE HIGH MOVES OFF THE COAST THURSDAY.
LATER THIS AFTERNOON AND TONIGHT ANOTHER ROUND OF THUNDERSTORMS WILL DEVELOP ACROSS THE HIGHER TERRAIN OF MEXICO AND MOVE INTO THE WESTERN SECTIONS OF THE CWA.
411 AM MDT WED APR 20 2016 UPPER LEVEL LOW HAS FINALLY MOVED OUT OF THE STATE. PERHAPS AIDED ALONG BY A WEAK SURGE IN THE LOW LEVEL PRESSURE/WIND FIELDS.
THE LARGE SCALE WEATHER PATTERN HAS A LARGE LOW PRESSURE CENTER OVER THE WRN US. THIS LOW HAS BEEN ROTATING VORTICITY MAXIMA INTO THE UPPER MIDWEST. AN AREA OF LOW PRESSURE WILL MOVE THROUGH SOUTHERN WI/NORTHERN IL ON THURSDAY BRINGING A POSSIBILITY OF SHOWERS TO MOST OF THE REGION.
401 AM EDT WED APR 20 2016 A RIDGE OF HIGH PRESSURE WILL CREST OVER THE NORTH COUNTRY TODAY AND TONIGHT.
WARMER TODAY WITH INCREASING CLOUDS. WARMER STILL ON THURSDAY WITH UPPER 70S IN MOST AREAS.
325 AM CDT WED APR 20 2016 Mid/upper lvl trough will make its way very slowly east toward the MS River and lower OH Valley regions through Thursday as the strong Omega blocking pattern that has been set up over the eastern third of the nation finally breaks down. The trailing cold front will reach move into southeast MO early Thursday, and then slowly cross the rest of the region Thursday afternoon and Thursday evening. The highest precip chances appear to be along and just ahead of the front Wednesday night into Thursday. Highs are forecast to reach the lower 70s, but this assumes at least a few breaks in the clouds.
628 AM EDT WED APR 20 2016 WEAK HIGH PRESSURE TODAY. PRECIPITATION CHANCES INCREASE FOR SECOND HALF OF THE WEEK WITH AN UPPER LEVEL LOW/COLD FRONT. HIGH PRESSURE FOR THE WEEKEND. AS THE UPPER LOW PARKED OVER THE PLAINS STATES STILL WAITS FOR A KICKER. WITH FILTERED SUNSHINE THRU CIRRUS CLOUDS FLOWING OVER THE UPPER RIDGE STILL DOMINATING THE OHIO VALLEY. LOOK FOR HIGH TEMPERATURES RANGING FROM THE UPPER 70S FAR NORTH TO THE LOWER 80S SOUTH. INCREASING LOW LEVEL MOISTURE AND RELATIVELY LIGHT WINDS OUTSIDE OF SOME MOUNTAIN RIDGETOP GUSTS WILL KEEP CONDITIONS BELOW RED FLAG. LOW LEVEL FLOWS INCREASE MODESTLY BUT ERRATICALLY AS THE NORTHERN TROUGH AXIS WEAKENS AND LOWER MISSISSIPPI VALLEY UPPER LOW BECOMES THE DOMINANT SYSTEM.
1146 PM MDT TUE APR 19 2016 UPPER LOW HAS DRIFTED INTO THE NEBRASKA PANHANDLE THIS AFTERNOON. WITH MAIN SPOKE OF ENERGY WRAPPING AROUND THE LOW LIFTING EASTWARD INTO WRN KS. NEXT WAVE ROTATING AROUND THE UPPER LOW MAY KEEP A FEW SHOWERS GOING ALONG THE CONTINENTAL DIVIDE. ESPECIALLY ACROSS THE LOWER ARKANSAS VALLEY FROM PUEBLO EASTWARD. UPPER LOW BEGINS TO MOVE EASTWARD ACROSS NEB. THEREFORE CONFIDENCE IS A LITTLE HIGHER FOR A DRIER AND WARMER WEEKEND ACROSS THE REGION. THE SLOW MOVING UPPER LOW THAT HAS STUCK AROUND FOR SEVERAL DAYS WILL FINALLY MOVE INTO THE UPPER MIDWEST AND AWAY FROM COLORADO.
350 AM MDT WED APR 20 2016 TODAY/S WEATHER WILL CONTINUE TO BE DICTATED BY THE CLOSED LOW WHICH HAS IMPACTED THE REGION SINCE LATE LAST WEEK. THE LOW CENTER HAS CONTINUED TO SLOWLY SHIFT TO THE EAST OVER THE PAST 24 HOURS AND WAS CENTERED OVER THE PANHANDLE REGION OF WESTERN NEBRASKA EARLY THIS MORNING. SNOW ACCUMULATIONS IN THE HIGHER TERRAIN ARE EXPECTED TO REMAIN LIGHT WITH MINOR IMPACTS TO ROADWAYS OVER THE MOUNTAIN PASSES IN THE AREA. A HIGH PRESSURE RIDGE BUILDS OVER THE AREA THURSDAY AND CONDITIONS WILL REMAIN DRY DURING THE EARLY PART OF THE DAY. RESIDUAL MOISTURE AND INSTABILITY ASSOCIATED WITH DAYTIME HEATING WILL BRING ABOUT SOME ISOLATED SHOWERS OVER THE HIGH COUNTRY.
A LOW PRESSURE SYSTEM IS EXPECTED TO MOVE THROUGH THE GREAT LAKES REGION AROUND THURSDAY. HIGH PRESSURE WILL BUILD INTO THE AREA OVER THE WEEKEND. WITH THE HIGHEST POPS IN THE WEST. WILL GO WITH THE HIGHEST POPS ON WEDNESDAY NIGHT AND THURSDAY AS A RESULT. BUT MODEL DATA SUGGEST CONVECTIVE DEVELOPMENT POSSIBLE LATE THURSDAY AFTERNOON AND NIGHT WITH THE PASSAGE OF THE COLD FRONT.
SFC HAS DIFFUSE HIGH P PATTERN WITH A WEAK INVERTED TROF ACROSS ECNTRL WY. HOWEVER SOMEWHAT WARMER AIR IS HEADED INTO THE FA FROM THE NORTH THIS AFTERNOON THRU THE EVENING. WED SHOULD SEE GENERALLY IMPROVING CONDITIONS AS THIS STAGNANT UPR COL SYSTEM FINALLY GETS A WEAK KICK IN THE PANTS AND IS SENT INTO THE CNTRL PLAINS WITH A DRY WARMING RIDGE SITTING AND WAITING TO TAKE ITS PLACE.
356 AM EDT WED APR 20 2016 WEAK HIGH PRESSURE TODAY. PRECIPITATION CHANCES INCREASE FOR SECOND HALF OF THE WEEK WITH AN UPPER LEVEL LOW/COLD FRONT. HIGH PRESSURE FOR THE WEEKEND. AS THE UPPER LOW PARKED OVER THE PLAINS STATES STILL WAITS FOR A KICKER. WITH FILTERED SUNSHINE THRU CIRRUS CLOUDS FLOWING OVER THE UPPER RIDGE STILL DOMINATING THE OHIO VALLEY. LOOK FOR HIGH TEMPERATURES RANGING FROM THE UPPER 70S FAR NORTH TO THE LOWER 80S SOUTH. INCREASING LOW LEVEL MOISTURE AND RELATIVELY LIGHT WINDS OUTSIDE OF SOME MOUNTAIN RIDGETOP GUSTS WILL KEEP CONDITIONS BELOW RED FLAG. LOW LEVEL FLOWS INCREASE MODESTLY BUT ERRATICALLY AS THE NORTHERN TROUGH AXIS WEAKENS AND LOWER MISSISSIPPI VALLEY UPPER LOW BECOMES THE DOMINANT SYSTEM.
136 AM EDT WED APR 20 2016 A COLD FRONT WILL MOVE SOUTH OF THE AREA THIS EVENING AND THEN MOVE BACK TO THE NORTH ON WEDNESDAY AND WEDNESDAY NIGHT. A TROUGH OF LOW PRESSURE WILL MOVE EAST THROUGH THE REGION ON THURSDAY.
BLOCKING PATTERN REMAINS OVER THE WESTERN CONUS WITH THE UPPER LEVEL RIDGE OVER THE FORECAST AREA THROUGH THURSDAY. A LOW PRESSURE SYSTEM OFF THE COAST OF NORTHERN CALIFORNIA THIS MORNING WILL MOVE NORTH- NORTHEAST ACROSS WESTERN OREGON TODAY. THE LOW COULD TRACK CLOSE ENOUGH AND BRING ENOUGH MOISTURE FOR A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS HARNEY COUNTY AND WESTERN BAKER COUNTY. THE UPPER LEVEL RIDGE AXIS WILL BE EAST OF THE FORECAST AREA ON THURSDAY. INCREASING SOUTHERLY FLOW WITH THE THERMAL TROUGH ALONG THE OREGON/IDAHO BORDER WILL ALLOW FOR TEMPERATURES AROUND 20 DEGREES ABOVE NORMAL /MID 80S IN THE VALLEY/.
104 AM EDT WED APR 20 2016 HIGH PRESSURE WILL CONTINUE TO BUILD OUT OF CANADA INTO THE NORTHEASTERN US.
333 AM CDT WED APR 20 2016 THE DECENT RAIN PRODUCING UPPER LOW WILL COME UP PRETTY MUCH AS EARLIER EXPECTED TODAY. THIS IS EXPECTED TO HOLD INTO THE EARLY MORNING DESPITE INCREASING HIGHER CLOUDS AHEAD OF THE SYSTEM WITH THE LOWER LEVELS MORE OR LESS LOCKED IN. TEMPERATURES WILL REACH THE LOWER TO MIDDLE 60S NORTH OF INTERSTATE 90 TODAY BUT STAY IN THE 50S IN MUCH OF NORTHWEST IOWA WITH THE DEVELOPING RAIN. THE APPROACHING NORTHWESTERLY UPPER FLOW AND ASSOCIATED RIDGING WILL BRING CLEARING NORTH AND WEST OF FSD. THURSDAY WILL SEE LOW PRESSURE ALOFT SHIFTING SOUTHEAST OF THE AREA.
A warm and dry ridge of high pressure will continue to dominate the weather over the Northern Rockies. We can expect another great day today, though some places along the Continental Divide could see breezy easterly winds this afternoon, making it feel slightly cooler. As the high pressure slides to the east, a warmer southwesterly flow will develop, allowing temperatures to warm even more.