Aikyam-Lab/Synoptic-Bench huggingface dataset:
LATEST SATELLITE IMAGERY SHOWED THE SOUTHERN STREAM STORM SYSTEM ASSOCIATED WITH A CLOSED LOW WAS PUSHING TOWARD THE REGION. ENOUGH COOLING LOOKS TO OCCUR ALONG THE HIGHWAY 82 CORRIDOR BY FRIDAY EVENING TO ALLOW SOME LIGHT SNOW TO MIX IN WITH THE RAIN BEFORE THE EVENT ENDS.
WITH COLD FRONT APPROACHING THE WESTERN ZONES BY 12Z. SOME MAX TEMPS ARE COOLER THAN CURRENT TEMPERATURES IN WEST/NORTHWEST. THIS GOES ALONG WITH VERY HIGH POPS AS COLD FRONT APPROACHES AND PWAT VALUES EXPECTED AS HIGH AS 1. UPPER LEVEL TROUGH LINGERS TONIGHT AND WILL CONTINUE THE RAIN CHANCES BEHIND THE FRONT. TEMPERATURES FRIDAY WILL BE MUCH COOLER WITH HIGHS ONLY IN THE LOWER TO MID 50S.
HIGH PRESSURE RIDGE WILL MOVE THROUGH THE AREA TODAY WITH THE NEXT IN THE SERIES OF FAST MOVING LOW PRESSURE SYSTEMS DROPS SOUTHEAST THROUGH ONTARIO ON FRIDAY.
While high clouds have been streaming into northeast KS from this system, they will only act to keep early morning temperatures a bit warmer in the middle to upper 20s. These clouds have also helped keep morning temps a bit warmer, but are expected to only gradually decrease through today and will likely keep high temperatures cooler. By Friday, the slow moving upper trough across the southern plains progresses eastward as it encounters a northern stream wave over the Midwest.
15Z SURFACE ANALYSIS PLACES AN AREA OF LOW PRESSURE OVER SOUTHERN TEXAS. MOISTURE HAS BEGUN TO MOVE INTO THE REGION AHEAD OF A DEVELOPING LOW PRESSURE SYSTEM WHICH IS LOCATED OVER SOUTH TEXAS. AS THE LOW MOVES EAST TODAY SOME LIGHT RAIN IS EXPECTED TO SPREAD INTO THE FORECAST AREA. AS TEMPERATURES TURN COLDER AND GET CLOSE TO FREEZING LATE TONIGHT A MIX OF RAIN AND SNOW WILL BE POSSIBLE. BY FRIDAY NIGHT THE LOW WILL BE MOVING TOWARD THE CAROLINA COAST WITH PRECIPITATION ENDING FROM WEST TO EAST.
636 AM EST THU JAN 22 2015 LOW PRESSURE WILL TRACK SOUTH AND EAST OF THE GULF OF MAINE TODAY. HIGH PRESSURE WILL BUILD ACROSS THE STATE LATER TONIGHT INTO FRIDAY.
/ISSUED 329 AM EST THU JAN 22 2015/ WEAK COLD FRONT WHICH CROSSED YESTERDAY, WILL NUDGE BACK NORTH AS A WARM FRONT THIS AFTERNOON ALONG THE WEST COAST. TONIGHT, SURFACE FLOW VEERS TO THE SE WITH LOW PRESSURE MOVING TO JUST SOUTH OF NEW ORLEANS BY DAWN FRIDAY.
1005 PM CST FRI FEB 20 2015 SFC COLD FRONT PLUNGING SWD FASTER THAN PROGGED SO HAVE UPDATED WIND GRIDS TO ACCOUNT FOR THIS. A COLD FRONT WILL PUSH THRU THE AREA THIS EVENING. COLD FRONT WILL MAKE ITS MOVE INTO THE FORECAST AREA THIS EVENING.
UPPER LEVEL NORTHWEST FLOW WILL REMAIN OVER THE AREA THROUGH THE PERIOD AS AN UPPER LOW SWINGS FROM HUDSON BAY TO OVER THE EAST COAST. THE HIGH THEN TRACKS OVER THE AREA SUNDAY AND SUNDAY NIGHT WITH WINDS BECOMING LIGHT. WITH HIGHS AROUND ZERO ACROSS THE NORTHEAST TO THE LOWER TEENS ACROSS THE SOUTHWEST BEFORE ANOTHER NIGHT OF MOSTLY SUBZERO LOWS SUNDAY NIGHT.
WITH COOLER TEMPS (LOW-MID 60S)NEAR THE COAST. TEMPERATURES WILL REMAIN WELL ABOVE FREEZING TONIGHT WITH LOWS IN THE UPPER 40S/LOW 50S. SOUTHWEST WINDS ON SUNDAY WILL PRODUCE EVEN WARMER TEMPERATURES WITH HIGHS RANGING FROM NEAR 70 AT THE COAST TO THE UPPER 70S INLAND. A SLOW MOVING COLD FRONT TO THE NW WILL DRIFT INTO CENTRAL GA WHICH MAY RESULT IN A FEW AFTERNOON SHOWERS OVER THE NORTHERN TIER COUNTIES OF SE GA.
THIS AREA OF PRECIPITATION WILL BE MAINLY FREEZING RAIN. ICE ACCRETION ON TREES AND POWER LINES WILL INCREASE WITH POWER OUTAGES BECOMING A REAL CONCERN CHATTANOOGA AIRPORT, TN 45 40 47 30 / 70 100 50 30 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 37 42 28 / 80 100 60 30 OAK RIDGE, TN 40 36 42 26 / 90 100 50 30 TRI CITIES AIRPORT, TN 42 36 43 25 / 90 100 60 30 NC.
CURRENTLY A WINTRY MIX ACROSS THE REGION WITH AREAS ALONG AND SOUTH OF INTERSTATE 40 GENERALLY FREEZING RAIN. SLEET AND FREEZING GOING EVEN THOUGH VERY STRONG LOW-LEVEL JET IS PULLING WARMER AIR NORTHWARD. ISENTROPIC LIFT WILL KEEP AREAS ALONG AND WEST OF INTERSTATE 75 WITH SIGNIFICANT FREEZING RAIN. MODELS SHOW THE ADVISORY AREA WARMING ABOVE FREEZING BY 15Z.
A COLD FRONT WILL SLIDE THROUGH THE AREA THIS MORNING.
the freezing cold air held on longer than models anticipated. Temperatures will not change much through sunrise with most locations holding just at the freezing mark or just slightly below freezing. A storm system will be out to our west across the High Plains region into Texas on Sunday.
SNOW WILL DIMINISH 09-18Z FROM NORTH TO SOUTH AS FORCING ASSOCIATED WITH AN UPPER LEVEL TROUGH MOVES MORE TO OUR SOUTH. CLOUDS CLEAR ALONG WITH DRY CONDITIONS SATURDAY AFTERNOON AND SATURDAY NIGHT AS ARCTIC HIGH PRESSURE BUILDS ACROSS NORTH DAKOTA. FOLLOWED CLOSELY TO THE 00 UTC NAM AND 21 UTC SREF SOLUTIONS WHICH HAVE THE BEST DEPICTION OF THE HIGH POP. CURRENT SURFACE ANALYSIS PLACES LOW OVER NORTHERN MINNESOTA WITH COLD FRONT SHIFTING THROUGH NORTHERN SOUTH DAKOTA BRINGING STEADY TO SLOWLY FALLING TEMPERATURES TO OUR AREA. UPPER LEVEL ANALYSIS PLACES LOW OVER HUDSON BAY WITH RIDGE OFF THE WEST COAST BRINGING CYCLONIC NORTHWESTERLY FLOW TO OUR AREA.
A cold front will move through the Permian Basin this morning then hang up around the Pecos River. Meanwhile, the aforementioned trough will approach the Four Corners region, backing flow aloft to the SW.
332 AM CST Sat Feb 21 2015 (Today and tonight) A cold front will push south across West Central Texas today and bring cooler temperatures. Highs today will track the front, with cooler numbers over the Big County.
BUT FAIRLY DRY AIR IN THE LOW LEVELS CONTINUES TO MOVE IN FROM THE SOUTHEAST.
A NICE BAND OF SLEET AND FREEZING RAIN HAS DEVELOPED OVER SOUTHEAST MISSOURI INTO THE PURCHASE AREA. THE MODELS ARE STILL MOSTLY WARMING THE ENTIRE AREA ABOVE FREEZING. BUT THE SURFACE FREEZING LINE DOES LAG THE BACK END OF THE PRECIPITATION. WE ARE NOT EXPECTING ANY CHANGE BACK TO FREEZING RAIN OR SNOW ON THE BACK EDGE OF THE PRECIPITATION SATURDAY AFTERNOON AND EVENING.
1105 PM CST FRI FEB 20 2015 EARLY THIS AFTN A COLD FRONT HAD ENTERED THE FAR NW CWA WITH AREAS OF VERY LIGHT SNOW AHEAD OF THIS FRONT ACROSS SOUTHERN AND EASTERN MN. THIS WAS MAINLY ASSOCIATED WITH WEAK WAA AHEAD OF AFOREMENTIONED COLD FRONT. WHILE A LARGE UPR LVL LOW ROTATES OVER NERN CANADA AND MAINTAINS A LARGE ERN NOAM TROF THROUGH THE WEEKEND. WINDS ON THE BACKSIDE OF THE HIGH AND AHEAD OF AN INCOMING CDFNT WILL AGAIN BE ELEVATED WITHIN AN ALREADY FRIGID SFC AIRMASS.
TEMPERATURES WILL ONLY APPROACH FREEZING ON SATURDAY WITH VALUES BELOW 20 DEGREES MOST OF THE WEEK.
SHOWERS WILL INCREASE OVER THE BLUE MTNS AND WALLOWAS SATURDAY MORNING AS ANOTHER MID LEVEL WAVE AND AN ASSOCIATED COLD FRONT DROP SOUTH ACROSS WA/OR.
ABUNDANT MOISTURE HAS STREAMED INTO THE LOWER LVLS ON GUSTY SELY WINDS TODAY. WARMING SOUTHERLIES HAVE NOW BECOME REESTABLISHED BETWEEN COOL HIGH PRESSURE EAST OF THE REGION. AND DEEPENING LOW PRESSURE OVER THE TEXAS PANHANDLE. WITH THE HIGH TEMPERATURE MOST LIKELY COMING EARLY MORNING. LOWS SUNDAY NIGHT EXPECTED TO REMAIN ABOVE FREEZING AT THIS TIME. BUT WILL BE CLOSING IN ON THE FREEZING MARK OVER CENTRAL LOUISIANA INTO INTERIOR SOUTHEAST TEXAS.
247 AM EST SAT FEB 21 2015 A WEAK WARM FRONT WILL DEVELOP AND REMAIN NEAR THE FORECAST AREA TODAY. A COLD FRONT APPROACHING FROM THE NORTHWEST WILL MOVE THROUGH THE FORECAST AREA SUNDAY AND SUNDAY NIGHT. MODELS INDICATING MUCH OF THE PRECIP REMAINING OUTSIDE OF THE CWA TROUGH MUCH OF THE DAY. THE RAIN CHANCE SHOULD INCREASE SUNDAY ASSOCIATED WITH CONVERGENCE ALONG A COLD FRONT. ALTHOUGH THE SURFACE MAY REMAIN DECOUPLED IF THE WEAK WARM FRONT LINGERS IN THE AREA. WE USED THE COOLER HIGH TEMPERATURE GUIDANCE. HIGH PRESSURE SHIFTS OFFSHORE THROUGH THE MORNING.
SFC COLD FRONT HAS MOVED RAPIDLY ACROSS THE AREA. MVFR CIGS WILL LIKELY DEVELOP IN THE WAKE OF THE COLD FRONT AT ALL TAF SITES EARLY IN THIS FCST CYCLE. /ISSUED 1005 PM CST FRI FEB 20 2015/ SFC COLD FRONT PLUNGING SWD FASTER THAN PROGGED SO HAVE UPDATED WIND GRIDS TO ACCOUNT FOR THIS. A COLD FRONT WILL PUSH THRU THE AREA THIS EVENING. COLD FRONT WILL MAKE ITS MOVE INTO THE FORECAST AREA THIS EVENING.
THE UPPER LEVEL LONGWAVE TROUGH AXIS IS POSITIONED WELL TO THE NORTH IN CENTRAL CANADA. BROAD HIGH PRESSURE CENTERED OVER THE MID ATLANTIC COAST COVERS MUCH OF THE EASTERN CONUS INCLUDING THE FLORIDA PENINSULA. HIGHS THIS AFTERNOON WILL TOP OUT IN THE 70S ACROSS THE FORECAST AREA WITH LOWS TONIGHT RANGING FROM THE LOW 50S OVER THE NATURE COAST. WITH HIGHS EXPECTED TO REACH THE LOW TO MID 80S OVER SOUTHWEST FLORIDA.
LINGERING SHOWERS WILL END TONIGHT AND SATURDAY MORNING AS AN UPPER LEVEL RIDGE OFF THE COAST EXPANDS INTO WESTERN WASHINGTON.
SFC TEMPS HAVE REMAINED ABOVE FREEZING FOR THE MOST PART.
STILL HAVE NOT BEEN ABLE TO BREAK THE FREEZING MARK OVER PORTIONS OF SE MO/SRN IL AND SW IN. WITH WARM FRONT EXPECTED TO SET UP SHOP SOMEWHERE NEAR THE OH RIVER THIS AM. PORTIONS OF OUR NORTH/WEST MAY STRUGGLE TO MAKE IT MUCH ABOVE FREEZING THROUGH NOON. LAYER OF FREEZING RAIN OVERNIGHT HAS CREATED 100 PERCENT RUN OFF CONDITIONS AND SNOW/ICE IS NOT ALLOWING SOME STREETS TO DRAIN PROPERLY. COULD ALSO BE SOME HEAVY FREEZING RAIN EARLY TODAY OVER THE OZARK FOOTHILLS OF SE MO. THE TRANSITION FROM FREEZING RAIN AND RAIN CURRENTLY OVER SOUTHEAST MISSOURI AND SOUTHWEST KENTUCKY AT 05Z WAS USED AS A MARKER TO TRANSITION FOR EACH TAF FORECAST GROUP.
BANDS OF PRECIP /MAINLY IN THE FORM OF FREEZING RAIN/ ARE MOVING WEST TO EAST ACROSS THE AREA AS STRONG LLVL WAA/ISENTROPIC FORCING INTERACTS WITH SHALLOW/ARCTIC COLD AIRMASS. 03Z/9PM TEMPS ACROSS NRN AL/SRN TN REMAIN BELOW FREEZING. SUPPORTING THE FREEZING RAIN (AT TIMES MIXED WITH SLEET). SFC TEMPS WILL GRADUALLY WARM ABOVE FREEZING FROM SOUTHWEST TO NORTHEAST OVERNIGHT REACHING THE I-65 CORRIDOR BETWEEN 2-4AM.
JHM Over the next few days, a series of upper level impulses will continue to drop down into the Great Basin, and eventually form a closed low over CA/NV. The limiting factor will be the low moisture content that will be available to the system.
A cold front currently in the TX Panhandle will arrive around 21/12Z with wind becoming NE. Cold front moving thru the Panhandle at the moment is being pushed by a 8mb/3hr isallobaric anticyclone. Still the general idea is that the isallobaric anticyclone will track sse and weaken by 12Z to around 6-7 mb, thus winds aren't expected to be as strong as they are now in the Panhandle when front arrives in the PB.
THERE IS A CEILING AT 6K FEET MADE UP OF STRATOCUMULUS STREAMING AROUND THE LARGE AREA OF HIGH PRESSURE AS IT MOVES OFF THE CAROLINA COAST. AS THE RIDGE MOVES OVER THE ATLANTIC. AND CUT OFF ANY REMAINING COOLER AIR ADVECTING ACROSS THE AREA. BECOMING WARMER THIS AFTERNOON.
A COLD FRONT WILL MOVE INTO SOUTHEAST OKLAHOMA AROUND 12Z. TEMPERATURES ARE ALL OVER THE PLACE IN THE WAKE OF THE WARM FRONT WITH MOSTLY MID TO UPPER 60S SOUTH AND STILL 43 AT IDABEL AND 40 AT DE QUEEN WITH CURRENT ZONES READING RISING AFTER MIDNIGHT. THE RADAR IS A LITTLE BUSY WITH SOME SHOWERS OVER THE HEART OF THE CWA/S WARMER AIR AND THERE IS SOME RAIN BRUSHING BY OVER THE COLDER AIR.
A COLD FRONT WILL MOVE ACROSS THE REGION. WIDELY SCATTERED AREAS OF LIGHT FREEZING RAIN CONTINUE. PRIMARILY IN THE ARKANSAS RIVER VALLEY AND IN THE LOWER TERRAIN AREAS OF CARROLL COUNTY. NO SIGNIFICANT REPORTS OF ICING AT THIS TIME AND HOPEFULLY TEMPERATURES WILL RISE ABOVE FREEZING OVER THE NEXT FEW HOURS.
WITH TEMPERATURES HOVERING NEAR FREEZING AND ONLY A BRIEF TRANSITION TO A WINTRY MIX ANTICIPATED. LIGHT SNOW IS EXPECTED TO REDEVELOP WITHIN THE ENTRANCE REGION OF THE UPPER JET/STRENGTHENING MID LEVEL BAROCLINIC ZONE ON SATURDAY ACROSS THE HIGH PLAINS SPREADING DOWNSTREAM INTO CENTRAL AND PORTIONS OF SOUTH CENTRAL KANSAS SATURDAY NIGHT/EARLY SUNDAY.
WARMER TEMPERATURES ARE APPROACHING KBNA AND KCKV. WITH EVERYONE ELSE WEST OF THERE ALREADY CHANGED OVER TO FREEZING RAIN. WITH WARMER TEMPERATURES JUST UP STREAM FROM THERE.
AHEAD OF A COLD FRONT. THEN LATE TONIGHT THROUGH SATURDAY MORNING A FAIRLY STRONG COLD FRONT WILL PUSH ACROSS THE FORECAST AREA. I EXPECT THE LOWEST CLOUDS BETWEEN 09Z AND 12Z MAINLY WEST OF THE I-35 CORRIDOR.
1014 AM EST WED JAN 21 2015 HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND TONIGHT. LOW PRESSURE WILL PASS OUT TO SEA SOUTH OF NEW ENGLAND LATE TONIGHT INTO THURSDAY.
504 AM CST WED JAN 21 2015 SNOW WILL GRADUALLY TAPER OFF TODAY AS SUBSIDENCE AND HIGH PRESSURE BUILDS IN LATER TONIGHT. WHILE AN UPPER LEVEL RIDGE BREAK OVERHEAD. THE UNCERTAINTY IN THE TIMING/AMOUNT OF CLEARING YIELDS LITTLE CONFIDENCE IN THE LOW TEMPERATURES. THE LARGE SCALE PATTERN WILL FEATURE UPPER RIDGING NOSING INTO THE PACIFIC NORTHWEST.
535 AM EST WED JAN 21 2015 COLD FRONT WILL CROSS THE AREA THIS MORNING. AN INCREASE IN MOISTURE WILL OCCUR THURSDAY WELL AHEAD OF LOW PRESSURE DEVELOPING NEAR THE TEXAS GULF COAST.
WITH 850 MB TEMPS IN THE 12Z OHX SOUNDING BEING ABOUT 10 DEGREES COOLER THAN THE SAME TIME YESTERDAY. HIGH TEMPS WILL BE COOLER THAN YESTERDAY. BASED ON OBSERVED TEMPS BEING A LITTLE WARMER THAN CURRENTLY FORECAST AND EXPECTED FULL SUN.
424 AM CST WED JAN 21 2015 LEADING EDGE OF THE COOLER AND DRIER AIR HAS FINALLY REACHED OUR SRN MOST TIER OF COUNTIES/PARISHES. THIS HAS HELPED TO KEEP THE LOW STRATUS AND FOG SOUTH OF THE AREA TONIGHT/THIS MORNING. WITH TEMPS HOLDING IN THE LOW 50S SOUTH OF I-20 BUT FLIRTING WITH FREEZING ACROSS SE OK/SRN AR. THE MERGED TROUGH WILL EVENTUALLY TRACK EWD ACROSS TX AND LA INTO THE SERN CONUS BY THE WEEKEND.
A SEASONAL LATE JANUARY DAY IS EXPECTED ON THURSDAY BEFORE A WARMING TREND BRINGS MUCH WARMER CONDITIONS TO THE AREA OVER THE WEEKEND.
AN UPPER LEVEL RIDGE WILL MOVE ACROSS WESTERN WASHINGTON TODAY FOR ANOTHER DRY DAY WITH INCREASING HIGH CLOUDS THROUGH THE DAY. A WARM FRONT WILL SPREAD RAIN INLAND ACROSS THE AREA MAINLY LATE TONIGHT AND THURSDAY.
THERE WAS SOME LIGHT SNOW ACROSS THE INTERNATIONAL BORDER REGION AS A WEAK COLD FRONT MOVES THROUGH THAT AREA. THERE HAS ALSO BEEN SOME PATCHY FREEZING DRIZZLE BUT NO ROAD ISSUES AT THIS POINT.
MUCH OF THE CONUS SITS UNDER A VERY BROAD AND UNAMPLIFIED LONGWAVE TROUGH.
531 AM CST WED JAN 21 2015 COLD FRONT HAS CLEARED THE LFK TERMINAL THIS MORNING AND THUS HAS MOVED SOUTH OF ALL TERMINALS ATTM. MID AND HIGH LEVEL MOISTURE EXPECTED TO RETURN IN EARNEST THIS EVENING INTO THE OVERNIGHT HOURS AND WITH THE RETURN OF A SOUTHERLY WIND IN THE LOWEST 5KFT. /ISSUED 424 AM CST WED JAN 21 2015/ LEADING EDGE OF THE COOLER AND DRIER AIR HAS FINALLY REACHED OUR SRN MOST TIER OF COUNTIES/PARISHES. THIS HAS HELPED TO KEEP THE LOW STRATUS AND FOG SOUTH OF THE AREA TONIGHT/THIS MORNING. WITH TEMPS HOLDING IN THE LOW 50S SOUTH OF I-20 BUT FLIRTING WITH FREEZING ACROSS SE OK/SRN AR. THE MERGED TROUGH WILL EVENTUALLY TRACK EWD ACROSS TX AND LA INTO THE SERN CONUS BY THE WEEKEND.
539 AM CST WED JAN 21 2015 LOW PRESSURE OVER NORTHEASTERN IA WILL MOVE TO THE UPPER OH RIVER VALLEY THIS AFTERNOON. HIGH PRESSURE WILL DOMINATE THE AREA TONIGHT INTO THE WEEKEND.
BUT OTHERWISE WE SHOULD SEE DRY CONDITIONS PREVAIL BEHIND THIS SYSTEM WITH FLOW ALOFT BECOMING ANTI-CYCLONIC AS A MID LEVEL RIDGE BUILDS OVER THE REGION THROUGH THURSDAY. WE WILL BEGIN TO TREND WARMER WITH THE INCREASING DOWNSLOPE FLOW THURSDAY. THE LEE TROUGH WILL TIGHTEN UP AGAIN BRINGING WINDY CONDITIONS W OF KBIL. THE JET CONTINUES TO PUSH OFF TO THE E THROUGH MON AND UPPER RIDGING BUILDS OVER THE REGION.
1010 AM EST WED JAN 21 2015 LATEST RUC ANALYSIS SHOWS THE FL PENINSULA GAINING THE BACKSIDE OF A BROAD SFC/LOW LVL TROF THANKS TO A STRONG ZONAL JET THAT DOMINATES THE WX PATTERN FROM THE CNTRL/SRN PLAINS TO THE SE COAST. A CONTINENTAL RIDGE WILL BUILD INTO THE DEEP SOUTH BEHIND THE DEPARTING TROF. BROAD LOW PRES TROF OVER THE WRN ATLC WILL PUSH E.
SHORT WAVE ENTERING SRN ID AND UPPER LOW MOVING THRU SRN CA WILL CONTINUE PUSHING EWD TODAY. THE PHASED UPPER LOW WILL CUT OFF NR THE 4 CORNERS REGION. WILL KEEP MIN TEMPS ON THE HIGHER SIDE OF GUIDANCE.
HIGH PRESSURE IS OVER THE NORTHERN ROCKIES THIS MORNING AND WILL KEEP THINGS DRY OVER THE FORECAST AREA TODAY AND MOST OF TONIGHT. BY LATE TONIGHT LOW PRESSURE DEVELOPS OVER SOUTH TEXAS. AS THE LOW GETS CLOSER TO THE FORECAST AREA THERE WILL BE A BETTER CHANCE OF LIGHT RAIN. PRECIPITATION WILL CONTINUE TO FALL OVER THE REGION AND WITH TEMPERATURES DROPPING CLOSE TO FREEZING THERE COULD BE A MIX OF RAIN AND SNOW ESPECIALLY OVER NORTHERN SECTIONS OF THE FORECAST AREA.
532 AM EST WED JAN 21 2015 LOW PRESSURE WILL MOVE ACROSS THE AREA TODAY. HIGH PRESSURE WILL BUILD IN TO END THE WEEK. OMEGA FIELDS AND MOISTURE PROFILES INDICATE A DECENT BURST OF SNW IS PSBL GENLY FOR AREAS N OF THE I 70 CORRIDOR AND IN THE RIDGES. THOUGH BROAD UPR TROFG WL RMN KEEPING CHCS FOR SNW SHWRS IN THE FCST. MDLS HAVE TRENDED FURTHER NW WITH THE WRN SHEILD OF PCPN ASSOCIATED WITH THE LOW. THE FIRST HALF OF NXT WEEK CONTS TO LK UNSETTLED AND DREARY WITH MDLS MAINTAINING A HIGH AMPLITUDE TROF OVR ERN NORTH AMERICA WITH SHRTWVS PROGRESSING THROUGH THE BASE.
TEMPERATURES ARE CLIMBING THROUGH THE LOWER 70S WITH LIGHT AND VARIABLE WINDS. THE EARLY MORNING LOCAL SOUNDING SHOWS THAT WINDS IN THE LOWER LAYERS HAVE TURNED TO THE WEST.
LEAVING PREDOM CLR SKIES AND SLIGHTLY COOLER AIR IN ITS WAKE. HIGH PRESSURE OUT OF THE NRN/CNTRL PLAINS STATES WILL HELP OFFER A TEMPO REPRIEVE FROM ANY WET WX. WHERE THE GLOBAL MODELS HAVE BEEN POINTING TOWARD A FAIRLY STRONG LOW PRESSURE SYSTEM/SFC WAVE DEVELOPING ACROSS THIS AREA. AS THE SFC WAVE AND ASSOCIATED UPPER TROUGH AXIS TRAVERSE EWD ACROSS THE GULF COAST REGION. ONE NOTICEABLE CAVEAT WITH THE NEW MODELS IS THE INFLUX/STRENGTH OF THE COLD AIR ADVECTION ALONG THE BACKSIDE OF THE EXITING LOW PRESSURE SYSTEM LATE FRI NIGHT. RAIN MAY START TO MIX WITH SNOW GOING INTO SAT MORNING AS SFC TEMPS FALL CLOSE TO THE FREEZING MARK. THE NEXT SYSTEM XPCTED TO IMPACT THE REGION WILL BE THE CLIPPER LIKE UPPER TROUGH AXIS DIVING SEWD ACROSS THE MIDWEST/TN VALLEY REGIONS HEADING INTO THE NEW WEEK.
MAINLY THE HIGHER TERRAIN SOUTH OF INTERSTATE 70. UPPER LEVEL LOW WILL BE OVER THE SOUTHERN ROCKIES COME THURSDAY MORNING.
HIGH PRESSURE ALOFT WILL EXPAND ACROSS THE WESTERN STATES DURING THE LATTER HALF OF THE WEEK.
This may result in temperatures a couple of degrees cooler than forecast but for now will keep our current highs in that area around 70. A dry cold front off to our northwest will advance southeastward and pass through the forecast area today. High temperatures will be quite mild for mid January with highs reaching the lower to mid 70s. Fog is slow to lift at KECP and KDHN although KABY has broken out of the low IFR conditions.
AN UPPER RIDGE HAS DEVELOPED OFFSHORE THIS MORNING WHICH WILL GRADUALLY SHIFT OVER US LATER TODAY AND THEN BREAK EAST OF US TONIGHT. SOME HIGH CLOUD WILL STREAM IN OVER THE RIDGE TODAY, BUT THE BIGGEST IMPACT WILL BE THE PERSISTENT FOG AND LOW CLOUD IN THE WEST SIDE VALLEYS. FOG AND CLOUD DIDN'T COMPLETELY CLEAR FROM THE ROGUE VALLEY YESTERDAY, AND THIS LEFT US QUITE A BIT COOLER THAN EXPECTED. THE HIGH IN MEDFORD, FOR EXAMPLE, WAS ONLY 38 DEGREES. THERE ISN'T MUCH CHANGE IN THE LOW LEVEL PROFILE, AND IF ANYTHING THE INVERSION IS LIKELY TO SHARPEN TODAY AS THE RIDGE MOVES OVER AND MID LEVEL TEMPS WARM. AS THE RIDGE WEAKENS AND MOVES EAST OF US TONIGHT AND THURSDAY, WE WILL DEVELOP MORE WEST TO SOUTHWEST FLOW ALOFT AND THERE WILL BE AN INCREASE IN MOISTURE.
1032 AM EST WED JAN 21 2015 LOW PRESSURE WILL AFFECT THE MID-ATLANTIC TODAY.
243 AM PST WED JAN 21 2015 HIGH PRESSURE BUILDING OVER THE EASTERN PACIFIC THIS WEEK WILL EXPAND OVER THE WEST COAST BY THE WEEKEND. WEAK VALLEY INVERSIONS WILL CONTRIBUTE TOWARD SLIGHTLY COOLER TEMPERATURES TODAY FOLLOWED BY A WARMING TREND AND HIGH TEMPERATURES REACHING 10 TO 15 DEGREES ABOVE NORMAL FOR THE WEEKEND.
637 AM EST WED JAN 21 2015 A LARGE AREA OF HIGH PRESSURE OVER EASTERN CANADA AND THE NORTHEAST PLENTY OF SUNSHINE. A LOW PRESSURE SYSTEM WILL PASS TO OUR SOUTH ON THURSDAY WITH ONLY CLOUDS EXPECTED AND TEMPERATURES A FEW DEGREES BELOW SEASONAL NORMALS.
HIGH PRESSURE OVER THE REGION WILL MAINTAIN DRY WEATHER CONDITIONS THROUGH THE WEEKEND. AN UPPER RIDGE AXIS WILL MOVE OVER THE AREA TODAY AND SHIFT EASTWARD TONIGHT. A WEAK MID LEVEL SHORT WAVE TROUGH WILL MOVE ACROSS THE AREA TONIGHT AND GENERATE CONSIDERABLE HIGH AND MID CLOUDS. RIDGE ALOFT WILL SPRING BACK ON THU AS THE S/W TROUGH HEADS OFF TO THE SE. GFS AND ECMWF CONTINUE TO SHOW HIGH LEVEL RH SPILLING OVER THE RIDGE FROM TIME TO TIME ON FRI.
1020 AM EST WED JAN 21 2015 LOW PRESSURE WILL MOVE ACROSS THE AREA TODAY. HIGH PRESSURE WILL BUILD IN TO END THE WEEK. ENDED UP EXTENDING FREEZING RAIN ADVISORY UNTIL 11 AM AS SHALLOW LAYER OF WARM AIR AROUND H925 CONTINUES TO CAUSE SUFFICIENT MELTING FOR FZRA. THOUGH BROAD UPR TROFG WL RMN KEEPING CHCS FOR SNW SHWRS IN THE FCST. MDLS HAVE TRENDED FURTHER NW WITH THE WRN SHEILD OF PCPN ASSOCIATED WITH THE LOW. THE FIRST HALF OF NXT WEEK CONTS TO LK UNSETTLED AND DREARY WITH MDLS MAINTAINING A HIGH AMPLITUDE TROF OVR ERN NORTH AMERICA WITH SHRTWVS PROGRESSING THROUGH THE BASE.
Have included chance PoPs along/north of I-74 as the low skirts by to the north, with dry conditions expected further south. With surface temps initially hovering near 32 degrees, may see a brief period of freezing and potential slick spots through about 14z. After that, temps warm enough to eliminate the threat of freezing.
951 AM EST WED JAN 21 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION THROUGH TODAY.
1050 AM EST WED JAN 21 2015 SUNNY AND WARMER THAN NORMAL CONDITIONS TODAY. WE BUMPED TEMPS UP A FEW DEGREES TO SHOW MAX TEMPS IN THE LOW TO MID 70S AT ALL INLAND LOCATIONS. THE AFTERNOON SEABREEZE WILL BRING COOLER TEMPS TO THE BEACHES AFTER BRIEFLY TOPPING OUT IN THE UPPER 60S. MIN TEMPS TONIGHT WILL AVERAGE A LITTLE ABOVE NORMAL WITH LOWS RANGING FROM THE LOW TO MID 40S NORTH TO THE LOW 50S SOUTH.
A WEAK COLD FRONT WILL PUSH THROUGH THE AREA TODAY. AND UPPER LEVEL DYNAMICS AND UPPER TROUGH MOVE A BIT CLOSER TO SOUTH TEXAS. COMBINE THIS WITH AN APPROACHING STRONGER COLD FRONT AND EXPECT A GOOD CHANCE OF MODERATE SHOWERS. TEMPERATURE TODAY SHOULD BE QUITE A BIT COOLER THAN YESTERDAY DUE TO THE ELEVATED MOISTURE. COULD BE A BIT COOLER THAN THIS. HIGHS ON THURSDAY TRICKY DUE TO TIMING OF COLD FRONT. NORTHERN AREAS HOWEVER LIKELY ONLY IN THE LOWER 60S WITH MID-DAY FRONTAL PASSAGE.
TODAY AND TONIGHT EARLY MORNING WATER VAPOR SATELLITE IMAGERY SHOWS AND UPPER-LEVEL TROUGH OVER THE GREAT BASIN. IN THIS AREA TEMPERATURES WILL BE NEAR OR BELOW THE FREEZING MARK.
547 AM EST WED JAN 21 2015 LOW PRESSURE WILL MOVE ACROSS THE AREA TODAY. HIGH PRESSURE WILL BUILD IN TO END THE WEEK. OMEGA FIELDS AND MOISTURE PROFILES INDICATE A DECENT BURST OF SNW IS PSBL GENLY FOR AREAS N OF THE I 70 CORRIDOR AND IN THE RIDGES. THOUGH BROAD UPR TROFG WL RMN KEEPING CHCS FOR SNW SHWRS IN THE FCST. MDLS HAVE TRENDED FURTHER NW WITH THE WRN SHEILD OF PCPN ASSOCIATED WITH THE LOW. THE FIRST HALF OF NXT WEEK CONTS TO LK UNSETTLED AND DREARY WITH MDLS MAINTAINING A HIGH AMPLITUDE TROF OVR ERN NORTH AMERICA WITH SHRTWVS PROGRESSING THROUGH THE BASE.
953 AM EST WED JAN 21 2015 A SERIES OF LOW PRESSURE SYSTEMS WILL MOVE THROUGH THE OHIO VALLEY TODAY AND MERGE OVER PENNSYLVANIA THIS EVENING.
1030 AM EST WED JAN 21 2015 LOW PRESSURE WILL AFFECT THE MID-ATLANTIC TODAY.
630 AM EST WED JAN 21 2015 A LARGE AREA OF HIGH PRESSURE OVER EASTERN CANADA AND THE NORTHEAST PLENTY OF SUNSHINE. A LOW PRESSURE SYSTEM WILL PASS TO OUR SOUTH ON THURSDAY WITH ONLY CLOUDS EXPECTED AND TEMPERATURES A FEW DEGREES BELOW SEASONAL NORMALS.
636 AM EST WED JAN 21 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION THROUGH TODAY.
Upper level high pressure ridge axis centering over the west coast this morning for fair skies most areas. Fair skies and stable conditions under the ridge allowed fog to form again in the central valley from about Oroville southward. Most areas should see a slight warming under the ridge bringing highs for the day up to about 5 to 12 degrees above normal.
AS LOW PRESSURE DEVELOPS ALONG THE GULF COAST. AND AN UPPER LOW APPROACHES FROM THE WEST.
352 AM MST WED JAN 21 2015 High pressure is building over the northern Rockies, causing mostly clear skies today.
927 AM EST WED JAN 21 2015 A LARGE AREA OF HIGH PRESSURE OVER EASTERN CANADA AND THE NORTHEAST PLENTY OF SUNSHINE. A LOW PRESSURE SYSTEM WILL PASS TO OUR SOUTH ON THURSDAY WITH ONLY CLOUDS EXPECTED AND TEMPERATURES A FEW DEGREES BELOW SEASONAL NORMALS.