Aikyam-Lab/Synoptic-Bench huggingface dataset:
228 PM EST SAT FEB 20 2016 HIGH PRESSURE OFF THE SOUTHEAST COAST WILL BE SUPPRESSED FARTHER SOUTHWARD AHEAD OF AN APPROACHING COLD FRONT.
SHOWERS WILL TAPER TODAY AND END BY THIS EVENING AS AN UPPER RIDGE BUILDS OVER THE AREA.
ALREADY TICKLED THE HIGH TEMPERATURE AT ABERDEEN SO NUDGED UP READINGS A TAD TO COMPENSATE. THIS STRATUS DECK SHOULD PRODUCE COOLER TEMPERATURES IN NORTHEASTERN SOUTH DAKOTA THAN PREVIOUSLY EXPECTED. AN AREA OF HIGH PRESSURE WILL DROP SOUTHWARD INTO THE REGION ON SUNDAY AFTERNOON THROUGH SUNDAY NIGHT. THESE COLD TEMPS WOULD NORMAL PRODUCE HIGHS IN THE LOW 20S. TO THE LOWS 40S.
241 PM CST SAT FEB 20 2016 SATURDAY AFTERNOON A BAROCLINIC ZONE WAS SETTING UP ACROSS NORTHERN NORTH DAKOTA ALONG A COLD FRONTAL BOUNDARY EXTENDING FROM NORTHWEST THROUGH EASTERN NORTH DAKOTA. WARM AIR WAS MOVING INTO SOUTHWEST NORTH DAKOTA WITH TEMPERATURES NEAR 50 DEGREES THERE VERSES THE LOWER 30S NORTH. SUNDAY WILL BE COOLER ACROSS ALL BUT THE SOUTHWEST AS THE DEPARTING SYSTEM WILL DRAG COOLER AIR SOUTHWARD THROUGH THE STATE. NORTH AND EAST OF THE MISSOURI RIVER TEMPERATURES WILL BE SLIGHTLY COOLER WITH READINGS IN THE UPPER 20S AND LOW 30S. A COLD FRONT EXTENDED FROM NEAR WILLISTON EAST TO GRAND FORKS. A WARM FRONT WAS MOVING INTO WESTERN NORTH DAKOTA.
1234 PM EST SAT FEB 20 2016 VFR CONDITIONS WILL REMAIN IN PLACE THROUGHOUT THE FORECAST PERIOD AS HIGH PRESSURE CONTINUES TO BRING DRY CONDITIONS TO THE REGION. /ISSUED 1014 AM EST SAT FEB 20 2016/ HIGH PRESSURE TO THE NORTHEAST CONTINUING TO KEEP A GENERALLY EASTERLY FLOW ACROSS SOUTH FLORIDA. /ISSUED 730 AM EST SAT FEB 20 2016/ HIGH PRESSURE OVER THE REGION WILL KEEP MOSTLY DRY WEATHER AND VFR CONDITIONS IN PLACE THROUGH THE TAF PERIOD. /ISSUED 315 AM EST SAT FEB 20 2016/ HIGH PRESSURE REMAINS IN CONTROL OVER THE SOUTHEAST CONUS.
SHOWERS WILL BE POSSIBLE ACROSS THE METROPLEX AS A COLD FRONT APPROACHES. THE COLD FRONT WILL MAKE IT TO THE METROPLEX AROUND 18Z. WACO WILL NOT GET IMPACTED BY THE COLD FRONT UNTIL LATER IN THE DAY SUNDAY. ALONG AND JUST BEHIND THE COLD FRONT.
A WEAK COLD FRONT WILL MOVE THROUGH THE AREA SUNDAY EVENING. HIGH PRESSURE WILL REMAIN OVER THE REGION FOR THE START OF THE WEEK. HIGH PRESSURE WILL BUILD OVER THE REGION FOR THE START OF THE WEEK.
1103 AM CST SAT FEB 20 2016 ALREADY TICKLED THE HIGH TEMPERATURE AT ABERDEEN SO NUDGED UP READINGS A TAD TO COMPENSATE. THIS STRATUS DECK SHOULD PRODUCE COOLER TEMPERATURES IN NORTHEASTERN SOUTH DAKOTA THAN PREVIOUSLY EXPECTED. AN AREA OF HIGH PRESSURE WILL DROP SOUTHWARD INTO THE REGION ON SUNDAY AFTERNOON THROUGH SUNDAY NIGHT. THESE COLD TEMPS WOULD NORMAL PRODUCE HIGHS IN THE LOW 20S. TO THE LOWS 40S.
212 PM EST SAT FEB 20 2016 A WEAK LOW PRESSURE SYSTEM WILL BRING A SLIGHT CHANCE FOR A SNOW SHOWER LATE SUNDAY.
A cold front stretching from the Great Lakes to the Red River Valley earlier today will push to the southeast tonight. Meanwhile, low pressure will ride up the front and cross the LMK CWA late tonight into Sunday morning. Sunday night the front will exit to the southeast and the upper trof will push through overhead, bringing a northwest to southeast end to the rain during the evening.
WEAK HIGH PRESSURE OVER WESTERN AND CENTRAL NORTH DAKOTA WILL MOVE EAST TODAY AS LOW PRESSURE APPROACHES FROM MONTANA. NEXT S/WV TROUGH IS CURRENTLY CROSSING OVER THE IDAHO PANHANDLE AND IS ALREADY GENERATING THERMAL UPGLIDE RADAR RETURNS OVER NORTHEASTERN MONTANA WHICH ARE WORKING THEIR WAY TOWARDS WESTERN NORTH DAKOTA. SNOW IS THE LIKELY TYPE NORTH ALONG TO NORTH OF A STATIONARY COLD FRONT. THE THREAT FOR FREEZING RAIN APPEARS LOW WITH THE ATMOSPHERE ALOFT WELL SATURATED AND SFC TEMPS ABOVE FREEZING IN THE WARM SECTOR. COLD FRONT SHIFTS SOUTHWARD TONIGHT TRANSITIONING PRECIPITATION TO ALL SNOW.
A WEAK COLD FRONT WILL DROP INTO THE AREA BY SUNDAY MORNING AND BECOME STATIONARY. LOW PRESSURE WILL MOVE EAST ALONG THE FRONT DURING SUNDAY. BRINGING COOLER TEMPERATURES AND POTENTIALLY HEAVY RAINS. A COOLER NORTH WIND.
/ISSUED 1033 AM CST SAT FEB 20 2016/ THE COLD FRONT THAT MOVED ACROSS MUCH OF OKLAHOMA YESTERDAY HAS RETREATED BACK TO NORTHWEST OKLAHOMA.
WITH TEMPERATURES BOTTOMING OUT IN THE LOW TO MID 60S ON SUNDAY MORNING. COULD ALSO SEE SOME SEA FOG DEVELOPMENT ALONG THE COAST TONIGHT WITH WARMER. MOIST AIR MOVING ACROSS THE COOLER COASTAL WATERS.
THIS DESPITE THE PASSAGE OF A COLD FRONT THIS MORNING. THUS MAINLY DRY CONDITIONS EXPECTED NEXT 24 HRS ALONG WITH COOLER TEMPS. LOW TEMPS ARE SOMEWHAT CHALLENGING AS DEPENDENT ON CLOUD COVER BUT OVERALL WILL SEE COOLER READINGS MAINLY IN THE LOWER TO MIDDLE 30S. NOTICEABLY COOLER CONDITIONS ON TAP WITH PARTLY TO MOSTLY CLOUDY SKIES.
A cold front will move into the area tomorrow morning, turning winds to the north at KABI after 12Z tomorrow.
THE CHANCES FOR RAIN WILL CONTINUE THROUGH THE DAY AHEAD OF THE COLD FRONT. RAIN WILL TAPER OFF AND COOLER TEMPERATURES WILL FILTER INTO THE AREA.
HIGH PRESSURE WILL BRING ANOTHER ROUND OF DRY AND UNSEASONABLY WARM CONDITIONS THIS WEEKEND AND INTO THE COMING WEEK.
247 PM CST SAT FEB 20 2016 Broad high surface pressure in place across the Central Plains region this afternoon, just behind a weak cold front to the south in central Oklahoma. Temperatures will flatten out in the low 70s as well early afternoon and remain steady until the sun begins to set and radiational cooling allows temperatures to rapidly fall into the 40s by mid evening. The NAM MOS solutions are really the coldest for tonight, suggesting upper 20s while the RAW individual models like the GFS and ECMWF are much warmer. Cooler highs are expected on Sunday as a result of low single digit 850 mb air sinking southward from the Northern Plains states.
IT WILL BE BREEZY AND GUSTY AS WELL FOR THE HIGHER ELEVATIONS ONCE AGAIN TODAY WITH 30 TO 60 KT WINDS IN THE 700 TO 500 MB LAYER.
I DID GO LOWER THAN GUIDANCE OVERALL SINCE HIGHS YESTERDAY WERE A FEW DEGREES COOLER THAN WHAT MODELS WERE SUGGESTING AND WE HAD MUCH WARMER AIR ALOFT AND MUCH BETTER MIXING WITH LESS CLOUD COVER. ZONAL FLOW WILL GRADUALLY GIVE WAY AND TRANSITION TO NORTHWESTERLY FLOW AS A LARGE UPPER LOW MOVES INTO THE HUDSON BAY REGION. THE LOW PRESSURES CYCLONIC FLOW INFLUENCE WILL BE BROAD AND BRING A COOLING TREND BEGINNING SUNDAY THEN CULMINATING WITH ANOTHER SYSTEM DROPPING THROUGH THE FLOW AND CARVING OUT A TROUGH INTO THE UPPER MIDWEST BY MIDWEEK. A COLD FRONT WILL SETTLE THROUGH IOWA TONIGHT INTO SUNDAY.
WITH TEMPERATURES ABOVE FREEZING. THE STRONGEST 500 TO 300 HPA POSITIVE POTENTIAL VORTICITY ADVECTION MOVES ACROSS THE FORECAST AREA SUNDAY MORNING AND INTO THE LOWER GREAT LAKES REGION BY 18Z. WITH TEMPERATURES ALOFT BELOW FREEZING.
LOW PRESSURE WILL DEVELOP OVER THE MID MS RIVER VALLEY AND MOVE EAST AS THE LOW TRACKS RIGHT ACROSS KY AND THE HEAVIEST PRECIP OVER THE NORTHERN HALF OF KY. IN FACT FREEZING SURFACE TEMPS WILL ONLY REACH THE BLUEGRASS BY 10Z. AN UNSETTLED PATTERN WILL BE THE STORY THROUGH MUCH OF THIS COMING WEEK AS A WEST COAST RIDGE/EAST COAST TROUGH REGIME MATERIALIZES ACROSS NORTH AMERICA.
MOST SITES WILL SEE CIGS IMPROVE TO AT LOW VFR LATER TODAY BUT LOW STRATUS IS EXPECTED TO RETURN AREA WIDE OVERNIGHT THROUGH SUNDAY AHEAD OF AN APPROACHING COLD FRONT. /ISSUED 424 AM CST SAT FEB 20 2016/ WV IMAGERY THIS MORNING SHOWS DEPARTING UPPER LOW OVER SRN QUEBEC. UPPER RIDGE CENTERED OVER THE GULF OF MEXICO.
1226 PM EST SAT FEB 20 2016 VFR CONDITIONS WILL REMAIN IN PLACE THROUGHOUT THE FORECAST PERIOD AS HIGH PRESSURE CONTINUES TO BRING DRY CONDITIONS TO THE REGION. /ISSUED 1014 AM EST SAT FEB 20 2016/ HIGH PRESSURE TO THE NORTHEAST CONTINUING TO KEEP A GENERALLY EASTERLY FLOW ACROSS SOUTH FLORIDA. /ISSUED 730 AM EST SAT FEB 20 2016/ HIGH PRESSURE OVER THE REGION WILL KEEP MOSTLY DRY WEATHER AND VFR CONDITIONS IN PLACE THROUGH THE TAF PERIOD. /ISSUED 315 AM EST SAT FEB 20 2016/ HIGH PRESSURE REMAINS IN CONTROL OVER THE SOUTHEAST CONUS.
1007 AM CST SAT FEB 20 2016 A weak cold front will move through the forecast area later this afternoon and this evening and bring an end to our early Spring-like weather. Until then though, it looks like another day in the lower 70s, although today will be much less windy than the previous few days. So temperatures in the lower 70s again seem likely. The flow over the eastern two-thirds of the country becomes mostly zonal with deep ridge over the eastern Pacific and West Coast.
Light W or SW winds this afternoon and tonight then winds veer to the northeast by mid morning as a cold front moves through. This will result in surface lee troughing and low level thermal ridging with near record to record high temperatures across west Texas and southeast New Mexico this afternoon. An upper level trough moving across the Ohio and Mississippi Valley will drag a cold front across the forecast area during the day Sunday. A weak southern stream trough and the right rear quadrant of an upper jet will enhance lift along and near the cold front to produce a slight chance to a chance of showers and thunderstorms across mainly west Texas during the day Sunday.
Probabilities should be highest across the northern/northeastern half of the CWA nearest the track of the low.
THIS BOUNDARY WILL MOVE SOUTH AS A COLD FRONT OVERNIGHT.
THE H5 RIDGE CONTINUES TO RETROGRADE WEST DURING THE NEXT 36 HOURS. THE WAVE WILL BRING ALONG A WEAK COLD FRONT INTO SOUTH TEXAS.
JUST LIKE THIS MORNING IT WILL DEPEND ON IF THE PRECIP WILL MAKE IT THROUGH THE DRY LAYER IN THE LOW/MID LEVELS.
1120 AM EST SAT FEB 20 2016 HIGH PRESSURE ALONG THE SOUTHEAST COAST WILL BE SUPPRESSED SOUTHWARD AS A COLD FRONT MOVES INTO THE AREA SUNDAY NIGHT.
1238 PM EST SAT FEB 20 2016 HIGH PRESSURE OFF THE SOUTHEAST COAST WILL BE SUPPRESSED FARTHER SOUTHWARD AHEAD OF AN APPROACHING COLD FRONT.
COLD FRONT WILL PROVIDE THE CHANCE FOR A FEW SPRINKLES OR MOUNTAIN SNOW SHOWERS SUNDAY. LOW PRESSURE SYSTEM WILL CONTINUE TO PUSH EASTWARD AND AWAY FROM OUR FORECAST AREA OVERNIGHT. OUR FORECAST AREA WILL REMAIN IN PROGRESSIVE UPPER LEVEL FLOW ON SUNDAY AND A COLD FRONT WILL ALSO CROSS THE FORECAST AREA RENEWING CHANCE FOR RAIN AND MOUNTAIN SNOW SHOWERS ACROSS THE NORTH COUNTRY.
12Z KCRP SOUNDING SHOWED THE DEPTH OF THE LOW-LEVEL INVERSION WITH LOTS OF GULF MOISTURE TRAPPED UNDERNEATH. LATEST KCRP VWP DATA SHOWED A MARKED DECREASE IN THE LOW-LEVEL JET OVERHEAD SO WE SHOULD BE ABLE TO BREAK THE INVERSION SOMEWHAT AND GET BETTER MIXING TO OCCUR AS THERE IS STILL PLENTY OF DRY AIR ABOVE 900MB. THE LOW LEVEL FLOW IS A LITTLE WEAKER AROUND THE VICTORIA AREA AND AREAS OF FOG HAVE FORMED IN THIS REGION. SATELLITE SHOWS MID AND HIGH LEVEL MOISTURE FROM WEST OF BAJA CALIFORNIA INTO NORTHWEST MEXICO THAT WILL MOVE INTO THE AREA TONIGHT AND REMAIN OVER SOUTH TEXAS ON SUNDAY AS AN UPPER LEVEL SHORT WAVE TROUGH MOVES INTO NORTHWEST MEXICO.
CEILINGS WILL LOWER TO IFR TO MVFR TONIGHT AS A COLD FRONT SAGS ACROSS THE OHIO RIVER VALLEY.
06Z SFC DATA HAD A WEAK TROF RUNNING FROM EASTERN MINNESOTA BACK INTO NEBRASKA. THE WEAK TROF WILL SWITCH WINDS AROUND TO THE NORTHWEST WITH ITS PASSAGE ALONG WITH SOME INCREASE IN CLOUDS.
A frontal boundary was draped from western north TX/southwest OK to a frontal low pressure south of Ponca City.
AND THIS COMBINED WITH THE LOWERING CLOUD DECKS COULD LEAD TO IFR/LIFR CONDITIONS.
A WEAK COLD FRONT WILL MOVE ACROSS THE TAF SITES TODAY.
THIS WAVE WILL MOVE THROUGH THE REGION THROUGH THIS EVENING WITH ACCOMPANIED COLD FRONT. TEMPERATURES WILL BE COOLER ON SUNDAY BEHIND THE FRONT WITH READINGS BACK INTO THE MID TO UPPER 40S OVER LOWER ELEVATIONS. WHICH WILL ALLOW FOR WARMER THAN NORMAL MINIMUM TEMPERATURES ALONG THE BASE OF THE FOOTHILLS.
AND INVADING HIGH CLOUDS FROM THE NNW TODAY INTO SUN AROUND THE TOP OF A AMPLIFYING UPPER LEVEL RIDGE ACROSS THE GULF OF MEXICO REGION. BEST CHANCE FOR FOG DEVELOPMENT TONIGHT WAS INDICATED ACROSS NE FL ALONG THE I-10 CORRIDOR SOUTHWARD WHERE STACKED RIDGING WILL BRING SUBSIDENCE AND POSSIBLY A LOW STRATUS DECK INLAND FROM THE GULF.
THIS TROF WILL MOVE THRU HERE TONIGHT WITH WNW FLOW IN ITS WAKE TOMORROW. AS THIS TROF CONTS INTO THE ERN USA TOMORROW. IT WILL BECOME MORE IN PHASE WITH A TROF OVER ERN CANADA. WHILE A PAC COLD FRONT WAS MOVING THRU THE WRN USA. BOTH FEATURES WILL CONT E WITH THE COLD FRONT MOVING THRU HERE TONIGHT. A CANADIAN COLD FRONT WILL ALSO DROP S WITH THE FRONTS MERGING. NUDGE WINDS TOWARD THE HIGHER END OF THE GUIDANCE AS THE BL EXPANDS INTO A LOW-LVL WIND MAX MOVING THRU.
108 PM PST SAT FEB 20 2016 HIGH PRESSURE WILL DOMINATE THE FORECAST AREA PRODUCING CLEAR SKIES AND A WARMING TREND OVER THE NEXT SEVERAL DAYS. STRONG INVERSION KEPT THE LOW LEVEL COOL AIR AND PATCHY DENSE FOG AND STRATUS IN PARTS OF THE SJV A BIT LONGER THAN EXPECTED. PATTERN WILL BEGIN TO AMPLIFY SOME TOMORROW AS A TROUGH MOVES THROUGH THE PAC NW. ONCE THE TROUGH PASSES. THE EPAC RIDGE WILL ONCE AGAIN TAKE OVER THE WEATHER PATTERN FOR THE NEXT SEVERAL DAYS.
BUT AREAS NW OF NASHVILLE WERE IN THE LOWER 70S WITH MAINLY SUNNY SKIES. A LOW PRESSURE CENTER DEVELOPING OVER THE MID MS VALLEY WILL MOVE UP THE OHIO RIVER VALLEY. WITH A TRAILING COLD FRONT DROPPING INTO MID TN SUNDAY EVENING. SHOWERS WILL END AND COOLER AIR WILL ARRIVE.
AND SUNDAY DESPITE TEMPERATURES ABOVE FREEZING. WET ROADWAYS AND GROUND TEMPERATURES BELOW FREEZING HAVE LED TO BLACK ICE ACROSS THE CWA EARLY THIS MORNING. THE COOLER WEATHER WILL MEAN HIGHS WILL BE LIMITED TO THE UPPER 30S TO LOWER 40S. HOWEVER WITH A COOLER AIRMASS IN PLACE OVERNIGHT LOWS ARE EXPECTED TO DIP DOWN INTO 20S ACROSS THE STATE. AN APPROACHING LOW PRESSURE SYSTEM WILL BRING SOME LIGHT SNOW SHOWERS TO THE NORTH. GIVEN THE COOLER AIRMASS IN PLACE WILL ADJUST THE PRECIPITATION TYPE TO GO WITH LESS LIQUID AND MORE FROZEN PRECIPITATION WITH THIS FORECAST.
threat of showers and thunderstorms will move into the far southern portion of the CWA with cooler and drier air beginning to filter into northern sections of the area.
Light winds have kept fire danger below critical levels, but do see some areas on satellite north of I70 in the low RH areas where some larger burn signatures are showing up. Warm front continues to slide slowly south and pivot to the east of its current position through the evening. Slightly cooler but drier air pushes southward overnight and drops lows into the 30s. Highs tomorrow still rise into the 50s to near 60, and the lower temperatures should keep RH values in the 30-40% range.
THE AREA REMAINS BETWEEN A RIDGE CENTERED IN THE ATLANTIC AND LOWER PRESSURE OVER THE CENTRAL PLAINS. AN UPPER LVL RIDGE STRETCHING FROM MEXICO CONTINUES KEEP THE AREA CAPPED AND WILL SO THROUGH MID SUNDAY. BY SUNDAY AFTERNOON AND EVENING A SHORT WAVE THAT IS CURRENTLY OVER ROCKIES WILL ERODE THE UPPER RIDGE AS IT APPROACHES.
SREF PROBABILITIES FOR MEASURING FREEZING RAIN ARE ESSENTIALLY NIL.
NEXT COLD FRONT IS MOVING EAST ACROSS THE NORTHWEST CONUS THIS MORNING. THIS EVENING THE COLD FRONT WILL ENTER THE WESTERN CWA.
High pressure to the east of the region will keep light southerly flow in place across the region tonight. Expect a warmer night with lows generally in the upper 40s to lower 50s.
333 AM EST TUE FEB 9 2016 LINGERING LIGHT SNOW WILL TAPER TO FLURRIES THIS MORNING AS LOW PRESSURE MOVES WELL EAST OF THE AREA. THIS LOW AND AN UPPER LEVEL TROUGH WILL PROVIDE CLOUDS ALONG WITH A FEW SNOW FLURRIES ACROSS THE REGION TODAY. ANOTHER WEAK LOW WILL PASS BY OFFSHORE ON WEDNESDAY WITH A TROUGH EXTENDING WESTWARD INTO NEW ENGLAND.
352 AM EST TUE FEB 9 2016 A SERIES OF CANADIAN HIGH PRESSURE SYSTEMS WILL BRING DRY AND QUITE COOL CONDITION TO SOUTH FLORIDA INTO THE HOLIDAY WEEKEND. CONSISTING OF DEEP-LAYER TROUGH ENCOMPASSING EASTERN AREAS. WITH WESTERN CONUS BENEATH RIDGE. THIS WILL ALLOW COOLER AIR TO CONTINUE SPILLING SOUTHWARD INTO FLORIDA. NEXT COLD FRONT ARRIVES WEDNESDAY. HIGH PRESSURE WILL CONTINUE TO DOMINATE.
18Z SFC DATA HAS AN INFERRED LOW OVER EASTERN LAKE SUPERIOR WITH A FRONTAL BOUNDARY FROM THE LOW TO CHICAGO. OVERALL THE FLOW LEADS TO COOLER TEMPS THEN SOME MODERATION IN THE TEMPS LATE IN THE PERIOD TOWARDS WARMER VALUES. QUICK MOVING SYSTEM WILL LIKELY LEAD TO LESS THAN AN INCH OF SNOW ACROSS THE ALONG THE HIGHWAY 34 CORRIDOR.
330 AM CST TUE FEB 9 2016 NORTH TEXAS IS CURRENTLY SITUATED BETWEEN A DEEP UPPER TROUGH ACROSS THE EASTERN HALF OF THE COUNTRY AND A RIDGE ACROSS THE WEST. NEAR NORMAL TO SLIGHTLY ABOVE-NORMAL TEMPS ARE EXPECTED ACROSS THE AREA TODAY AS THE UPPER RIDGE NOSES IN FROM THE WEST. THE EXCEPTION WILL BE OVER THE NORTHEAST COUNTIES WHERE INFLUENCE FROM THE EAST COAST TROUGH WILL BE FELT. HIGHS WILL RANGE FROM THE LOW 50S IN THE NORTHEAST TO THE MOD 60S ACROSS THE WEST. SOUTHWEST WINDS WILL DEVELOP WEDNESDAY AHEAD OF ANOTHER COLD FRONT.
GETTING REPORTS OF A TRACE UP TO AROUND 2 INCHES SO FAR AS WELL AS SOME SLICK ROADS DUE TO TEMPS FALLING BELOW FREEZING ACROSS THE AREA. WITH TEMPERATURES REMAINING BELOW FREEZING.
45 HAVE DROPPED THE LOW WATER ADVISORY AS WINDS HAVE LESSENED OVER THE BAYS.
1122 PM CST MON FEB 8 2016 AN UPPER LEVEL RIDGE WILL PERSIST ACROSS THE WESTERN UNITED STATES WHILE AN UPPER TROUGH HANGS ON OVER THE EASTERN UNITED STATES. WITH LONGWAVE TROFS OVER THE E PAC AND ERN N AMERICA. WITH A RIDGE OVER WRN N AMERICA. ITS EASTWARD PROGRESSION WILL FORCE THE E PAC TROF ONSHORE SAT AND IT'S FCST TO ARRIVE HERE SUN.
1025 PM MST MON FEB 8 2016 06Z TAF CYCLE STRONG HIGH PRESSURE SYSTEM ALOFT TO THE WEST OF NM WILL MAINTAIN ITS POSITION THROUGH THE FCST PERIOD CONTINUING THE DRY AND MOSTLY LIGHT WIND WX PATTERN AREAWIDE. DRY NORTHWEST FLOW ALOFT TO PERSIST THROUGH MIDWEEK AS AN ANOMALOUSLY WARM WEST COAST RIDGE GRADUALLY SHIFTS EAST AND WEAKENS ACROSS THE INTERMOUNTAIN WEST.
HIGH PRESSURE OVER THE PACIFIC NORTHWEST IS LEADING TO A QUIET WEATHER NIGHT OVER THE FORECAST AREA.
WV IMAGERY THIS MORNING CONTINUES TO SHOW BROAD TROF OVER THE EASTERN HALF OF THE COUNTRY WITH LARGE RIDGE OVER THE WEST.
HIGHLY AMPLIFIES RIDGE WILL VIRTUALLY REMAIN IN PLACE ACROSS THE WESTERN CONUS WITH A TROUGH ACROSS THE EASTERN CONUS. THIS LOW PRESSURE AREA WILL WEAKEN THROUGH THE NEXT 24 HOURS WHILE SHIFTING SOUTHWARD SO THE HIGH LEVEL MOISTURE WILL DECREASE OVERNIGHT TONIGHT. WITH HIGH PRESSURE ACROSS THE AREA AND WEAK LOWER TROPOSPHERIC FLOW. HIGH TODAY WILL BE IN THE LOWER TO MID 70S WITH MOSTLY SUNNY SKIES. WEDNESDAY WILL BE A LITTLE WARMER WITH HIGHS IN THE MID TO UPPER 70S.
950 PM PST MON FEB 8 2016 Strong high pressure will persist into Wednesday.
/ISSUED 357 PM CST MON FEB 8 2016/ THE UPPER-AIR PATTERN FOR MOST OF THIS FORECAST PACKAGE WILL FEATURE A STRONG RIDGE ANCHORED OVER THE INTER-MOUNTAIN WEST AND A DEEP TROUGH OVER THE EASTERN CONUS. WITH AN AREA OF LOW PRESSURE PARKED OVER THE BAJA PENINSULA. THE RIDGE WILL WEAKEN SOME BY THE MIDDLE OF THIS WEEK. AS THE RIDGE WEAKENS AND SHIFTS EAST HEADING INTO THE WEEKEND. A WEAK COLD FRONT MAY EDGE INTO THE PANHANDLES AND KNOCK TEMPERATURES A LITTLE CLOSER TO NORMAL. THE LOWEST RELATIVE HUMIDITIES LOOK TO BE POSSIBLE DURING THE AFTERNOON ON WEDNESDAY /1O TO 15 PERCENT/.
THIS EVENING THROUGH TUESDAY NIGHT 20Z UPPER AIR ANALYSIS REVEALS A HIGHLY AMPLIFIED TROUGH AND RIDGE IN THE EASTERN AND WESTERN CONUS.
COULD EVEN SEE SOME LOCATIONS IN SOUTH CENTRAL KS CLIMB INTO THE LOW 60S AS SURFACE WINDS SHIFT AROUND TO THE SW. WHICH WILL PUSH ANOTHER WEAK COLD FRONT ACROSS KS. AS HIGH PRESSURE BEGINS TO DROP SOUTH ACROSS THE REGION.
Pattern remains amplified on Wednesday with ridging to the west and troughing east.
GUSTY NORTH WINDS PREVAIL IN WAKE OF COLD FRONT THAT MOVED ACROSS SOUTH TEXAS THIS MORNING. WINDS WILL GRADUALLY DECREASE THIS EVENING AS HIGH PRESSURE SETTLES FURTHER SOUTH OVER THE REGION. AND LOWS WILL BE A BIT WARMER. WINDS AND SEAS WILL GRADUALLY SUBSIDE AS HIGH PRESSURE SETTLES FURTHER SOUTH OVER THE REGION TONIGHT. DEWPOINTS CONTINUE TO FALL OVER THE REGION IN WAKE OF A COLD FRONT THAT PASSED THIS MORNING.
GUSTY WSW WINDS 8-10KTS CURRENTLY AHEAD OF APPROACHING COLD FRONT.
WINDS WILL GRADUALLY BECOME MORE EASTERLY BY TUESDAY EVENING AS HIGH PRESSURE MOVES EAST.
408 AM EST TUE FEB 9 2016 THE WEATHER WILL REMAIN ACTIVE ACROSS EASTERN KENTUCKY TODAY THROUGH WEDNESDAY DUE TO A LARGE AREA OF LOW PRESSURE ALOFT THAT IS CURRENTLY SPINNING IN PLACE OVER THE EASTERN GREAT LAKES REGION. ISOLATED/SCATTERED UPSLOPE-INDUCED SNOW SHOWERS WILL END FROM WEST TO EAST WEDNESDAY EVENING IN WAKE OF A DEPARTING TROUGH AXIS AS SURFACE RIDGING BUILDS EASTWARD AND INTO THE REGION. BUT SHOULD SEE ANY DEVELOPMENT REMAIN NEAR AND WEST OF THE INTERSTATE 71 CORRIDOR IF THIS SHALLOW LIFT IS EVEN ENOUGH TO GENERATE ANY SEMBLANCE OF SNOW ALONG A COLD FRONT.
311 AM EST TUE FEB 9 2016 UNDER THE INFLUENCE OF A SLOW-MOVING BROAD UPPER TROUGH. LOCATIONS ALONG THE HIGH TERRAIN OF THE EAST TENNESSEE MOUNTAINS WILL EXPERIENCE STEADY MODERATE SNOW BANDS EARLY THIS MORNING AND WELL INTO DAY TODAY. ALONG WITH QUICK ACCUMULATIONS DUE TO THE SUBFREEZING SURFACES. DEEP UPPER TROUGH WILL BEGIN TO LIFT NORTHEAST WEDNESDAY AND WEDNESDAY NIGHT WITH SNOW SHOWERS/FLURRIES COMING TO AN END AND CLOUDS SLOWLY ERODING.
CURRENT WATER VAPOR SATELLITE DATA CONTINUES TO INDICATE AN AMPLIFIED MID/UPPER-LEVEL LONGWAVE TROUGH ENCOMPASSING MUCH OF THE EASTERN CONUS THIS EVENING. WITH A DISTINCT VORT MAX EMBEDDED WITHIN THIS TROUGH DIGGING EAST-SOUTHEASTWARD INTO KENTUCKY. UPPER-LEVEL TROUGH REMAINS ANCHORED ACROSS THE REGION THIS EVENING. AS A DISTURBANCE WITHIN THE TROUGH APPROACHES THE REGION FROM THE WEST.
THE HIGHEST SNOWFALL ACCUMULATIONS WILL OCCUR IN NORTH CENTRAL NORTH DAKOTA. ANTICIPATE MOSTLY LIGHT SNOW WITH A NARROW AREA OF LIGHT FREEZING RAIN. WILL CONTINUE TO ADVERTISE THE LIGHT FREEZING RAIN IN THE HWO/HAZARDOUS WEATHER OUTLOOK FOR NOW AND ADJUSTMENTS CAN BE MADE LATER TODAY IF FORECAST CONDITIONS LOOK DIFFERENT. AS A STATIONARY FRONT SEPARATES WARMER TEMPERATURES IN THE WEST FROM COLDER AIR IN THE EAST. THE LATEST WATER VAPOR IMAGERY AND UPPER AIR ANALYSIS SHOWS NORTHWEST FLOW CONTINUING INTO NORTH DAKOTA WITH AN UPPER RIDGE CENTERED ACROSS NORTHERN CALIFORNIA. WITH A NARROW AREA OF LIGHT FREEZING RAIN IN THE WARM SECTOR TUESDAY NIGHT. OMEGA LOOKS SUFFICIENT TO GENERATE SOME LIGHT FREEZING RAIN.
318 AM CST TUE FEB 9 2016 Upper-level troughing will pervade from the Great Lakes through the eastern CONUS this week and into the weekend, resulting in chilly but mainly dry conditions throughout the CWA. Fluctuations in the strength and westward extent of the upper trough will allow highs to vary from the upper 20s to the middle 40s this week, and will also be moderated by cloud cover from weak, passing waves dropping down the back side of the upper trough. Broad, weak lift associated with the right entrance region of an upper jet streak will combine with pacific moisture rounding the ridge across the western U.
WITH RAP/HRRR SOUNDINGS INDICATING THE POTENTIAL FOR 40 KNOT GUSTS ALL THE WAY UNTIL MIDNIGHT ESPECIALLY OVER THE BUFFALO RIDGE. SURFACE RIDGING WILL ATTEMPT TO SLIDE EASTWARD ON TUESDAY. THE HIGH TEMPERATURE GRADIENT WILL BE SUBSTANTIAL FROM WEST TO EAST. TO THE LOWER OR MID 30S IN SOUTH CENTRAL SD.
There is a decent area of transient frontogensis that clips the Kirksville area and with temperatures well below freezing in that part of the forecast they could see some light snow.
STRONG HIGH PRESSURE REMAINS IN PLACE DURING THIS ENTIRE TIME. ALTHOUGH THE DENSE FOG APPEARS LIMITED ON CAMERAS AND IN THE OBSERVATIONS TO THE UPPER SNAKE RIVER PLAIN AND THE LOWER ELEVATIONS OF THE UPPER SNAKE HIGHLANDS.
SLOW COOLING AND SLIGHTLY HIGHER RELATIVE HUMIDITY BY THE WEEKEND AS HIGH PRESSURE ALOFT WEAKENS. THE MEGA-RIDGE ACROSS WESTERN N.
STRONG HIGH PRESSURE ALOFT WILL REMAIN THE DOMINANT WEATHER FEATURE ACROSS THE INTERIOR WEST THROUGHOUT THE WEEK. A STRONG UPPER RIDGE EXTENDS OVER THE WEST COAST STATES FROM NRN WASHINGTON TO SRN CA. INVERSIONS REMAIN WELL DEVELOPED IN MOST VALLEYS BUT THERE HAS BEEN SOME GRADUAL WARMING OF THE TRAPPED AIR WITH MILFORD REACHING ABOVE FREEZING.
321 AM CST TUE FEB 9 2016 H5 SIMILAR PATTERN TO YESTERDAY WITH WESTERN CONUS RIDGE AND DEEP TROUGH OVER THE EASTERN CONUS. TEMPERATURES IN THE LOW 30S OVER NORTH CENTRAL ONEILL VICINITY AND TO THE WEST OF HIGHWAY 83 IN THE UPPER 30S TO AROUND 40. LOWS IN THE MAINLY IN THE LOWER 20S WITH TEENS ONEILL.
THE UPPER LEVEL PATTERN WILL CONTINUE TO FEATURE A RIDGE OVER THE WEST COAST. LONG WAVE TROUGH ACROSS THE EASTERN CONUS AND NORTHWEST FLOW OVER OUR AREA.