Aikyam-Lab/Synoptic-Bench huggingface dataset:
901 PM CDT TUE SEP 8 2015 A cold frontal boundary is currently draped from the central Great Lakes area to SE Kansas across central Illinois. A slow cold front is moving through the forecast area tonight and plenty of precipitation has formed out ahead of the boundary. Overnight lows will drop considerably cooler in the extreme NW with access to a cooler air mass. The cold front should progress to near I-70 by sunrise Wed morning, with ongoing showers and storms expected in our southeast counties at sunrise. Cooler and drier air arriving on Wed behind the front will set the stage for much cooler conditions the rest of the week.
/ISSUED 444 PM CDT TUE SEP 8 2015/ TEMPERATURES AROUND THE REGION CLIMBED INTO THE LOW TO MID 90S WITH A BIT COOLER TEMPERATURES TOWARDS THE COAST. OVERNIGHT LOWS AGAIN ARE EXPECTED IN THE LOW TO MID 70S WITH A BIT OF FOG TOWARDS SUNRISE. A COOL FRONT IS EXPECTED TO MOVE TOWARDS THE REGION TOMORROW AS AN UPPER LEVEL LOW LIFTS TO THE NORTH AND INTO THE FLORIDA PANHANDLE.
WITH THE VICINITY NORTH CENTRAL GULF TROUGH. THE SHEAR ZONE/TROUGH/UPPER LOW ROTATING OVER THE NORTH CENTRAL GULF WILL PROVIDE THE LARGE SCALE LIFT. SE TEXAS WAS BETWEEN A DEEP LAYER LOW PRESSURE LOCATED NEAR THE SE LA COAST AND AN UPPER HIGH PRESSURE AREA LOCATED NEAR FAR WEST TX. OVER THE NEXT FEW DAYS THE UPPER LOW OVER THE GULF WILL SHEAR OUT AS THE RIDGE OUT WEST WEAKENS SLIGHTLY AND A WESTERLY TROUGH DEEPENS INTO THE GULF UPPER LEVEL SYSTEM.
COLD FRONT STARTING TO PICK UP A BIT OF FORWARD SPEED. AS A WEAK COLD FRONT BUT THAT CHANCE TOO SMALL TO TARGET ANY PARTICULAR TIME WITH A TEMPO GROUP. A COLD FRONT MOVING SOUTH THROUGH THE AREA THIS EVENING WILL HELP KEEP THUNDERSTORM CHANCES GOING OVERNIGHT. EASTERLY FLOW UP TO ABOUT 700 MB AND NORTHERLY FLOW ALOFT WILL RESULT IN COOLER TEMPERATURES.
A COLD FRONT WILL APPROACH FROM THE NORTHWEST TONIGHT.
HIGH PRESSURE ALOFT WILL STRENGTHEN ACROSS THE WESTERN STATES THROUGH THE FIRST HALF OF THE UPCOMING WEEKEND. WATER VAPOR LOOP SHOWS A RIDGE BUILDING INTO THE WESTERN GREAT BASIN FROM NORTHERN MEXICO. THE UPPER RIDGE CURRENTLY OVER THE SOUTHERN ROCKIES AND DESERT SOUTHWEST WILL EXPAND NORTHWARD AND DOMINATE THE WESTERN STATES THROUGH AT LEAST THE FIRST HALF OF THE UPCOMING WEEKEND.
HIGH PRESSURE AT THE SURFACE RESIDES OVER WESTERN MONTANA WITH A RIDGE OVER WYOMING THIS AFTERNOON. TEMPERATURES OBSERVED IN THE LOW TO MID 70S SO FAR AS OF 1 PM. GETTING FAIRLY WIDESPREAD GUSTS EXCEEDING 25 MPH ALONG AND WEST OF THE LARAMIE RANGE WITH HUMIDITIES FALLING INTO THE LOW TO MID TEEN PERCENT RANGE.
1157 PM EDT TUE SEP 8 2015 AN EASTWARD MOVING COLD FRONT WILL BRING SHOWERS AND PERHAPS A FEW THUNDERSTORMS TO THE REGION OVERNIGHT INTO EARLY WEDNESDAY. THIS WILL BE FOLLOWED BY DRY AND COOLER WEATHER INTO THIS WEEKEND. A LITTLE BETTER INSTABILITY TO THE SW AND A VORT MAX MOVG THROUGH THE BASE OF THE WEAK MID LEVEL TROF SHOULD RESULT IN INCREASING SHOWER ACTIVITY AND PSBLY ISOLATED THUNDERSTORMS LATE TONIGHT. PRIMARY SYNOPTIC FRONT WILL THEN TRANSLATE SLOWLY SE THROUGH THE REGION IN ADVANCE OF A MID LEVEL TROUGH OVERNIGHT INTO WEDNESDAY. A WELCOMED SHOT OF COOLER AIR AND DECENT RAIN/ISO THUNDER CHANCES WILL ACCOMPANY THIS FEATURE.
404 PM PDT TUE SEP 8 2015 HIGH PRESSURE WILL CONTINUE TO STRENGTHEN OVER THE REGION THROUGH MID-WEEK AND BRING MOSTLY CLEAR SKIES AND MUCH ABOVE NORMAL TEMPERATURES TO THE AREA FOR THE NEXT SEVERAL DAYS. AN UPPER LEVEL RIDGE IS BUILDING OVER THE REGION BRINGING MOSTLY CLOUD FREE SKIES TO OUR AREA EXCEPT FOR A FEW CU DEVELOPING OVER THE HIGHER ELEVATIONS. THE BUILDING RIDGE HAS HELPED TO TRAP SMOKE FROM THE ROUGH FIRE. THE RIDGE IS ALSO CREATING VERY WARM AND DRY CONDITIONS. SHOWING THE RIDGE HOLDING STRONG OVER THE AREA THROUGH THE END OF THE WEEK.
AN UPPER LEVEL TROUGH MOVES ACROSS THE NORTHERN PLAINS STATES INTO THE GREAT LAKES. A MID/UPPER LEVEL RIDGE OVER FAR WESTERN TEXAS SHIFTS TO SOUTHWESTERN STATES/NORTHERN MEXICO. A MID/UPPER LEVEL LOW OVER THE GULF OF MEXICO JUST SOUTH OF LOUISIANA DRIFTS TO THE WEST TO OFF THE TEXAS COAST AND WEAKENS INTO A TROUGH.
An upper level trough was moving across the Northern and Central Plains this afternoon. Upper trough axis moving through could touch off some showers and storms behind the surface front and along the 850 mb front this evening and will keep a small chance of precipitation for the north this evening. Lows tonight will fall into the 60s for lows with cooler highs in the lower 80s on Wednesday.
648 PM CDT TUE SEP 8 2015 FOR 00Z TAFS /ISSUED 250 PM CDT TUE SEP 8 2015/ A WEAK UPPER LOW OVER WAS OFF THE LA COAST WHILE A FAIRLY STRONG CDFNT EXTENDED FROM THE SWRN US THRU THE MIDWEST AND INTO THE GREAT LAKES. MOISTURE ROTATING ARND THE UPPER LOW OFF THE LA COAST WILL CONTINUE TO MOVE TOWARDS THE TN VALLEY.
1102 PM EDT TUE SEP 8 2015 A WARM FRONT WILL PUSH THROUGH THE REGION OVERNIGHT BRINGING A BAND OF RAIN SHOWERS. TOMORROW AFTERNOON A WEAK COLD FRONT WILL PUSH THROUGH THE AREA.
A cold front was also moving south across western Kansas.
636 PM CDT TUE SEP 8 2015 MEDIUM RANGE MODELS IN QUITE GOOD AGREEMENT LARGE SCALE FLOW WILL EVOLVE THE NEXT SEVERAL DAYS GOING FROM A BROAD TROF CURRENTLY OVER THE NRN TIER OF THE U. TO SHARP AMPLIFICATION OF A TROF ENVELOPING THE ERN CONUS WITH A HIGH PRESSURE DOME OVER THE WRN CONUS.
PUSHING THE COLD FRONT THAT CROSSED OUR FORECAST AREA LAST NIGHT FURTHER DOWN INTO MISSOURI. BUT OTHERWISE DRY AND COOLER WEATHER IS ANTICIPATED OVERNIGHT AND THE FORECAST REMAINS ON TRACK. ALONG WITH WINDS GOING NEARLY CALM AS THE HIGH PRESSURE AREA APPROACHES PARTICULARLY IN OUR NORTHERN COUNTIES. CURRENT NRN CONUS MEAN TROUGH WILL SLOWLY EVOLVE AND AMPLIFY WITH TIME. THIS WILL BRING IN A COOLER AND DRIER AIRMASS. PRECIP SHOULD DIMINISH LATE THU NIGHT LEADING TO A PROLONGED PERIOD OF DRY WEATHER AND COOLER TEMPERATURES AS FLOW AMPLIFIES. THIS WILL BRING A DECIDEDLY COOLER AIRMASS IN SHARP CONTRAST TO THE END OF LAST WEEK. RIDGE OF HIGH PRESSURE MOVES INTO THE AREA THROUGH 18Z WED WITH RETURN SW FLOW AND SCT-BKN HIGH OVC WEST AREAS LATE IN PERIOD.
A COLD FRONT WILL SLOWLY MOVE ACROSS THE REGION LATE WEDNESDAY THROUGH WEDNESDAY NIGHT BRINING WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS.
DURING WEDNESDAY SOME DRIER SUBSIDENT MID LEVEL AIR ASSOCIATED WITH THE DEEP LAYERED RIDGING BUILDING IN OVER THE REGION FROM THE EAST SHOULD RESULT IN LOWER COVERAGE OF SHOWERS/STORMS ALONG THE SEA BREEZE BOUNDARIES DURING THE AFTERNOON AND EVENING HOURS. LITTLE CHANGE IS CURRENT CONDITIONS ARE EXPECTED OVERNIGHT INTO WEDNESDAY AS HIGH PRESSURE BUILDS IN OVER THE WATERS.
603 PM CDT TUE SEP 8 2015 THE NORTHERN PLAINS REMAINS ON THE SOUTHERN EDGE OF A LARGE UPPER LOW ACROSS NORTHERN MANITOBA. WEAK HIGH PRESSURE ACROSS WESTERN AND CENTRAL NORTH DAKOTA SOUTH OF THE FILLING NORTHERN MANITOBA LOW WILL CONTINUE TO WEAKEN THROUGH THE NIGHT.
MODELS ARE SHOWING DEW POINTS MIXING INTO THE LOW 30S TONIGHT WHICH IS REALLY HARD TO BELIEVE GIVEN THE RECENT RAIN. MID LEVEL CLOUDS WILL SPREAD OVERHEAD WEDNESDAY IN ADVANCE OF THE NEXT WAVE TO ROTATE AROUND THE BROAD TROUGH OVER CANADA. THIS FEATURE MAY BEGIN TO DEVELOP SHOWERS OR SPRINKLES ALONG ITS WARM FRONT DURING THE AFTERNOON. THE INCREASE IN CLOUDS SHOULD HAMPER HIGHS A BIT IN THE LOW TO MID 70S.
/ISSUED 246 PM CDT TUE SEP 8 2015/ Surface cold front pushing into far northeast Oklahoma as of mid afternoon.
SURFACE OBSERVATIONS AT 3 PM SHOWED A WEAK COLD FRONT STRETCHING FROM EXTREME NORTHERN LOWER MICHIGAN SOUTHEAST ACROSS LAKE MICHIGAN EXTENDING ALL THE WAY SOUTHWEST THROUGH NORTHEAST MISSOURI. HIGH PRESSURE BUILDS INTO THE REGION LATE TONIGHT INTO WEDNESDAY WITH SKIES BECOMING MOSTLY CLEAR. HIGH PRESSURE WILL BE IN CONTROL ON WEDNESDAY PROVIDING DRY AND QUIET WEATHER. THE FORECAST FOCUS THEN TURNS TO LOW PRESSURE PUSHING THROUGH THE REGION LATE WEDNESDAY INTO WEDNESDAY NIGHT WHICH WILL DRAG A STRONGER COLD FRONT ACROSS THE REGION. HIGH PRESSURE SLIDE OFF TO THE EAST WEDNESDAY NIGHT AND WE ARE EXPECTED TO SEE SOME MOISTURE RETURN ON THE BACK SIDE OF THE DEPARTING HIGH.
658 PM CDT TUE SEP 8 2015 A slow cold front is moving through the forecast area tonight and plenty of precipitation has formed out ahead of the boundary. Overnight lows will drop considerably cooler in the extreme NW with access to a cooler air mass. The cold front should progress to near I-70 by sunrise Wed morning, with ongoing showers and storms expected in our southeast counties at sunrise. Cooler and drier air arriving on Wed behind the front will set the stage for much cooler conditions the rest of the week.
A COLD FRONT WILL SLOWLY CROSS THE RED RIVER DURING THE EARLY MORNING HOURS. DUE TO A BROAD UPPER TROUGH CURRENTLY TRAVERSING THE CENTRAL PLAINS. THE UPPER TROUGH IS ONE SYSTEM IN PARTICULAR WHICH WILL IMPACT OUR LOCAL WEATHER OVER THE NEXT 36 HOURS OR SO. IT HAS HELPED SEND A COLD FRONT SOUTHEASTWARD TOWARDS NORTH TEXAS. THE COMBINATION OF THE SURFACE FRONT AND THE UPPER TROUGH WILL PROVIDE CHANCES FOR SHOWERS AND THUNDERSTORMS ACROSS THE REGION OVER THE NEXT COUPLE OF DAYS. THE LATEST SURFACE ANALYSIS PLACES THE FRONTAL BOUNDARY ALONG A LINE EXTENDING FROM THE CHICAGO AREA SOUTHWEST ACROSS CENTRAL OKLAHOMA TO A LOW PRESSURE CENTER BETWEEN WICHITA FALLS AND CHILDRESS. PRECIPITATION CHANCES WILL DECREASE FROM WEST TO EAST DURING THE LATE AFTERNOON AND EVENING AS ASCENT ASSOCIATED WITH THE UPPER TROUGH AXIS SHIFTS EAST OF THE REGION.
1136 PM CDT TUE SEP 8 2015 MEDIUM RANGE MODELS IN QUITE GOOD AGREEMENT LARGE SCALE FLOW WILL EVOLVE THE NEXT SEVERAL DAYS GOING FROM A BROAD TROF CURRENTLY OVER THE NRN TIER OF THE U. TO SHARP AMPLIFICATION OF A TROF ENVELOPING THE ERN CONUS WITH A HIGH PRESSURE DOME OVER THE WRN CONUS.
814 PM EDT TUE SEP 8 2015 AVIATION SHOWERS AND A FEW GUSTY THUNDERSTORMS WILL GRADUALLY SWEEP FROM WEST TO EAST ACROSS LOWER MICHIGAN THIS EVENING AS A COLD FRONT BRINGS AND END TO OUR STRING OF HOT AND HUMID DAYS.
BREEZY BEHIND AS HIGH PRESSURE BUILDS INTO CENTRAL/NORTHERN PLAINS THIS AFTERNOON WITH WEST/NORTHWEST WINDS GUSTING TO AROUND 25 MPH. ON WEDNESDAY IT WILL BE MOSTLY CLOUDY AS A WEAK COLD FRONT DROPS SOUTH INTO THE UPPER MIDWEST WITH A CHANCE FOR SHOWERS ACROSS PARTS OF THE REGION. THESE IMPULSES ARE STILL WITHIN THE INFLUENCE OF THE CLOSED LOW OVER NORTHERN MANITOBA WHICH WILL MOVE EAST INTO FAR NORTHWEST ONTARIO TONIGHT INTO TOMORROW. TO THE WEST ACROSS THE NORTHERN HIGH PLAINS ONE OF THE STRONGER MID-LEVEL TROUGHS/VORT MAXES IS DEEPENING WITH CLOUD COVER DEVELOPING. LOWS IN THE LOW TO MID 40S. ON TUESDAY A COLD FRONT WILL SLIDE SOUTHWARD ACROSS THE UPPER MIDWEST. WITH LARGE-SCALE LIFT BEGINNING TO DEVELOP AHEAD OF THE MID- LEVEL TROUGH THIS COULD LEAD TO SOME SHOWERS ALONG THE INTERNATIONAL BORDER. WENT COOLER THAN MOST GUIDANCE GIVEN EXPECTED CLOUD COVER.
449 PM PDT TUE SEP 8 2015 As a weather system exits the area this evening high pressure will gradually build over Eastern Washington and Northern Idaho and allow for a warming and drying trend under sunny skies to run through the rest of the week. An upper ridge will begin to build into the region through Wednesday. The ridge axis will remain off the coast resulting in a continued northwest flow aloft which will allow mid and high clouds to pass through the region at times especially over northern Washington and Idaho. This will be especially true tonight and Wednesday before the ridge begins to amplify Wed ngt shunting most of the clouds north and east of the region.
SURFACE COLD FRONT MOVING THROUGH THE CENTRAL PLAINS WILL BE OUR NEXT WEATHERMAKER.
858 PM EDT TUE SEP 8 2015 AN EASTWARD MOVING COLD FRONT WILL BRING SHOWERS AND PERHAPS A FEW THUNDERSTORMS TO THE REGION OVERNIGHT INTO EARLY WEDNESDAY. THIS WILL BE FOLLOWED BY DRY AND COOLER WEATHER INTO THIS WEEKEND. PRIMARY SYNOPTIC FRONT WILL THEN TRANSLATE SLOWLY SE THROUGH THE REGION IN ADVANCE OF A MID LEVEL TROUGH OVERNIGHT INTO WEDNESDAY. A WELCOMED SHOT OF COOLER AIR AND DECENT RAIN/ISO THUNDER CHANCES WILL ACCOMPANY THIS FEATURE.
/ISSUED 250 PM CDT TUE SEP 8 2015/ TEMPERATURES ACROSS THE MIDSOUTH ARE MOSTLY IN THE LOW TO MIDDLE 90S. TOMORROW WE WILL BEGIN TO SEE SOME CHANGES ACROSS THE REGION AS A SLOW MOVING COLD FRONT APPROACHES FROM THE NORTHWEST.
614 PM CDT TUE SEP 8 2015 COOLER AND DRIER AIR SETTLING INTO THE AREA THIS AFTERNOON WITH A WEAK HIGH PRESSURE EXPECTED TO QUICKLY MOVE THROUGH. BROAD UPPER TROUGH CENTERED NEAR THE HUDSON BAY WILL PLACE THE NORTHERN PLAINS UNDER COOL NORTHWEST FLOW ALOFT THROUGH THE END OF THE WORK WEEK.
Air behind the boundary not significantly cooler, however northerly wind and lower dewpoints behind the front should make it feel less humid than the last several days.
A cold front was located across the Texas Panhandle and extreme northwest Oklahoma. To the north of the front, temperatures were much cooler, upper 70s and lower 80s.
THIS EVENING THROUGH WEDNESDAY NIGHT 19Z SURFACE ANALYSIS HAD MODEST HIGH PRESSURE OVER THE CWA WITH MOSTLY CLEAR SKIES AND SOME CU HERE AND THERE. TROUGH WILL REACH CENTRAL SD AROUND PEAK HEATING. TEMPERATURES WILL BE SLIGHTLY WARMER THAN TODAY AS 850-700MB TEMPERATURES RISE A BIT.
817 PM EDT TUE SEP 8 2015 AN EASTWARD MOVING COLD FRONT WILL BRING SHOWERS AND PERHAPS A FEW THUNDERSTORMS TO THE REGION OVERNIGHT INTO EARLY WEDNESDAY. THIS WILL BE FOLLOWED BY DRY AND COOLER WEATHER INTO THIS WEEKEND. PRIMARY SYNOPTIC FRONT WILL THEN TRANSLATE SLOWLY SE THROUGH THE REGION IN ADVANCE OF A MID LEVEL TROUGH OVERNIGHT INTO WEDNESDAY. A WELCOMED SHOT OF COOLER AIR AND DECENT RAIN/ISO THUNDER CHANCES WILL ACCOMPANY THIS FEATURE.
1036 PM EDT TUE SEP 8 2015 A COLD FRONT WILL MOVE ACROSS THE AREA DURING THE DAYLIGHT HOURS ON WEDNESDAY.
747 PM EDT TUE SEP 8 2015 A COLD FRONT WILL MOVE ACROSS THE AREA DURING THE DAYLIGHT HOURS ON WEDNESDAY.
HOWEVER WITH THE APPROACH OF THE COLD FRONT TOWARD LATE WEDNESDAY NIGHT.
1000 PM EDT TUE SEP 8 2015 UPPER LEVEL RIDGE BREAKS DOWN TONIGHT. AS A COLD FRONT APPROACHES FROM THE WEST.
COOLER LOW TEMPS TONIGHT LOOK GOOD. BROAD HIGH PRESSURE ALOFT WILL BUILD OVER THE PACIFIC NORTHWEST AND NORTHERN ROCKY MOUNTAIN REGION WITH A RESULTANT DRY NORTHWEST FLOW OVER COLORADO.
HOWEVER A TRAILING BROAD UPR TROF AND LINGERING LOW- LEVEL MOISTURE MAY SLOW THE CLEARING TREND A BIT.
724 PM EDT TUE SEP 8 2015 UPPER LEVEL RIDGE BREAKS DOWN TONIGHT. AS A COLD FRONT APPROACHES FROM THE WEST.
AN UPPER LEVEL RIDGE CONTINUES TO EXPAND OVER THE WESTERN UNITED STATES WITH TEMPERATURES WARMING ALOFT.
A DISTURBANCE AT 500MB EMBEDDED WITHIN A LARGER TROUGH WILL CONTINUE TO MOVE NORTHWARD TONIGHT ACROSS THE EASTERN PART OF THE FORECAST AREA. SCATTERED SHOWERS FROM THIS AFTERNOON ASSOCIATED WITH LOW PRESSURE SYSTEM ARE DECREASING IN COVERAGE OVER THE PAST HOUR OR SO AND SHOULD CONTINUE TO DO SO OVERNIGHT. TROUGHING WILL REMAIN PRESENT AND ANOTHER ROUND OF SHOWERS WILL BE POSSIBLE AGAIN DURING THE DAY ON WEDNESDAY.
AS A WEAK COLD FRONT BUT THAT CHANCE TOO SMALL TO TARGET ANY PARTICULAR TIME WITH A TEMPO GROUP. A COLD FRONT MOVING SOUTH THROUGH THE AREA THIS EVENING WILL HELP KEEP THUNDERSTORM CHANCES GOING OVERNIGHT. EASTERLY FLOW UP TO ABOUT 700 MB AND NORTHERLY FLOW ALOFT WILL RESULT IN COOLER TEMPERATURES.
1042 PM CDT TUE SEP 8 2015 COOLER AND DRIER AIR SETTLING INTO THE AREA THIS AFTERNOON WITH A WEAK HIGH PRESSURE EXPECTED TO QUICKLY MOVE THROUGH. BROAD UPPER TROUGH CENTERED NEAR THE HUDSON BAY WILL PLACE THE NORTHERN PLAINS UNDER COOL NORTHWEST FLOW ALOFT THROUGH THE END OF THE WORK WEEK.
FLAT, ZONAL UPPER FLOW OVER THE PACIFIC NORTHWEST AND A THERMAL TROUGH ALONG THE NORCAL AND SOUTHERN OREGON COAST WILL LEAD TO CONTINUED QUIET WEATHER TONIGHT. THE HEAT CONTINUES TO BUILD TOMORROW AS OFFSHORE FLOW CONTINUES AND UPPER RIDGING BUILDS.
1105 PM EDT TUE SEP 8 2015 LATE EVENING SURFACE ANALYSIS DEPICTS LOW PRESSURE (1012 MILLIBARS) OVER SOUTHWEST GEORGIA. WEAK ATLANTIC HIGH PRESSURE (1017 MILLIBARS) WAS BUILDING WESTWARD INTO THE FLORIDA PENINSULA. A CUTOFF CYCLONE WAS SPINNING OVER THE CENTRAL GULF OF MEXICO. WITH DEEP-LAYERED ATLANTIC RIDGING IN PLACE OVER THE BAHAMAS. WITH DEEP-LAYERED ATLANTIC RIDGING BUILDING INTO THE FLORIDA PENINSULA ON WEDNESDAY. WITH WARMER AND DRIER CONDITIONS ALOFT. ATLANTIC RIDGING WILL CONTINUE TO BUILD OVER THE FLORIDA PENINSULA ON WEDNESDAY.
713 PM EDT TUE SEP 8 2015 HIGH PRESSURE REMAINS IN CONTROL TONIGHT.
1145 PM CDT TUE SEP 8 2015 A cold frontal boundary is currently draped from the central Great Lakes area to SE Kansas across central Illinois. A slow cold front is moving through the forecast area tonight and plenty of precipitation has formed out ahead of the boundary. Overnight lows will drop considerably cooler in the extreme NW with access to a cooler air mass. The cold front should progress to near I-70 by sunrise Wed morning, with ongoing showers and storms expected in our southeast counties at sunrise. Cooler and drier air arriving on Wed behind the front will set the stage for much cooler conditions the rest of the week.
443 PM PDT TUE SEP 8 2015 HIGH PRESSURE WILL CONTINUE TO STRENGTHEN OVER THE REGION THROUGH MID-WEEK AND BRING MOSTLY CLEAR SKIES AND MUCH ABOVE NORMAL TEMPERATURES TO THE AREA FOR THE NEXT SEVERAL DAYS. AN UPPER LEVEL RIDGE IS BUILDING OVER THE REGION BRINGING MOSTLY CLOUD FREE SKIES TO OUR AREA EXCEPT FOR A FEW CU DEVELOPING OVER THE HIGHER ELEVATIONS. THE BUILDING RIDGE HAS HELPED TO TRAP SMOKE FROM THE ROUGH FIRE. THE RIDGE IS ALSO CREATING VERY WARM AND DRY CONDITIONS. SHOWING THE RIDGE HOLDING STRONG OVER THE AREA THROUGH THE END OF THE WEEK.
1052 PM MDT TUE SEP 8 2015 WV IMAGERY SHOWING BROAD LOW AMPLITUDE TROF ACROSS THE CONUS. W/ CENTER OF TROF OVR CNTRL CANADA AND WY UNDER MOSTLY DRY NW FLOW.
1059 PM EDT TUE SEP 8 2015 CURRENTLY - AN ATLANTIC PRESSURE RIDGE IS BUILDING WESTWARD ACROSS FLORIDA. SHORT TERM UPDATE (OVERNIGHT) - WINDS WILL REMAIN LIGHT OUT OF THE EAST TO SOUTHEAST DUE TO THE RIDGE TO OUR NORTH. WEAK RIDGING WILL PERSIST ACROSS FLORIDA.
916 PM CDT TUE SEP 8 2015 COLD FRONT HAS EXITED THE FAR SOUTHEAST WITH DRIER AIR MOVING IN.
TEMPS WERE ADJUSTED TO REFLECT SLIGHTLY COOLER AIR BEHIND THE FRONT.
719 PM EDT TUE SEP 8 2015 AN INLAND WEDGE OF HIGH PRESSURE WILL DISSIPATE TONIGHT.
A COLD UPPER TROUGH OVER THE GREAT LAKES WILL MOVE INTO THE NEW ENGLAND STATES.
THE COOLING CLOUD TOPS OVER SOUTHWEST UTAH AND SOUTHERN NEVADA HAS CAUSED SOME CONCERN THAT THERE MAY BE A LITTLE MORE LIFT ASSOCIATED WITH THE ELONGATED TROUGH ENTERING THE SOUTHWEST CONUS TODAY. TEMPERATURE FORECAST TODAY ARE RATHER CHALLENGING DUE TO THE WARM LAYER BETWEEN 5500 AND 7500 FT WHICH IS ABOUT 5-15 DEGREE F WARMER THAN YESTERDAY AT THIS TIME. CURRENT FORECAST LOOKS REASONABLE BUT IF WE WERE TO GET ANY BREAKS IN CLOUD COVER THEN THE HIGHER BENCHES AND MID MOUNTAIN SITES COULD SPIKE TO NEAR 40 DEGREES.
125 PM EST SUN JAN 3 2016 A RE-ENFORCING COLD FRONT WILL MOVE THROUGH THE REGION TONIGHT.
242 PM MST SUN JAN 3 2016 TEMPERATURES HAVE WARMED NICELY INTO THE 30S AND 40S ACROSS THE NORTHEAST PLAINS WHILE EVEN KREMMLING HAS WARMED TO ABOVE ZERO THIS AFTERNOON! THE RIDGE ALOFT OVER COLORADO TODAY WILL SHIFT INTO THE CENTRAL PLAINS IN RESPONSE TO INCOMING SYSTEM OFF WEST COAST. TEMPERATURES OVER MOUNTAIN VALLEYS WILL BE A BIT WARMER TONIGHT GIVEN MORE CLOUD COVER AND OVERALL MODERATION OF TEMPERATURES.
1202 PM MST SUN JAN 3 2016 18Z WATER VAPOR IMAGERY/RUC ANALYSIS INDICATES SHORT WAVE RIDGING IN PLACE ACROSS THE HIGH PLAINS. WITH ANY CIRRUS NOT MOVING PAST THE RIDGE AXIS AT THIS POINT. TEMPS HAVE CLIMBED QUICKLY AND WILL LIKELY SEE SEVERAL LOCATIONS IN THE LOW 50S TODAY. MAIN CONCERN FOR THE PERIOD WILL BE FOG POTENTIAL TONIGHT AS COOLER AIR BACKS INTO THE AREA. ESPECIALLY AS LEE TROUGH BEGINS TO DEVELOP ACROSS EASTERN COLORADO. SOUTHERLY WINDS WILL INCREASE TO AROUND 20 MPH AND BECOME GUSTY ALONG THE KS-CO BORDER AS LEE TROUGH STRENGTHENS. A INCLUDING SNOW AND FREEZING DRIZZLE.
MID LEVELS CLOUDS WILL CONTINUE TO STREAM ACROSS THE AREA TODAY IN ADVANCE OF THE INITIAL LOW PRESSURE SYSTEM CURRENTLY OFF THE CA COAST THAT IS SLATED TO AFFECT THE AREA MONDAY. CONDITIONS SUNDAY APPEAR DRY AND NEAR SEASONAL VALUES AS WEAK RIDGE REMAINS OVER THE AREA AND ALLOWS FOR STABLE CONDITIONS TO REMAIN THROUGH THE WEEKEND. ACROSS THE HIGHER TERRAIN THIS PRECIPITATION IS ANTICIPATED TO FALL MAINLY AS SNOW.
TEMPERATURES WILL BEGIN TO MODERATE LATER IN THE WEEK AS HIGH PRESSURE BUILDS EASTWARD. THE LOW CLOUD SHIELD CONTINUES TO MAKE SLOW PROGRESS SOUTHEASTWARD. AS HIGH PRESSURE BUILDS IN AND BRINGS WITH IT THE COLDEST AIR OF THE SEASON TO DATE.
205 PM CST SUN JAN 3 2016 THE COOLER AIRMASS THAT THE FRONT BROUGHT WILL LET TEMPERATURES DIP A LITTLE LOWER TONIGHT THAN LAST.
EVEN COLDER AIR ARRIVES BY MONDAY AND MONDAY NIGHT WITH HIGHS IN THE LOWER TO MIDDLE 20S AND LOWS IN THE TEENS AND SINGLE DIGITS MONDAY NIGHT. ERN CONUS HGTS FLATTEN QUICKLY TO START THE PD IN WAKE OF LARGER SCALE TROUGH PROGRESSING INTO THE WRN ATL AS SFC RIDGING EXPANDS INVOF OF THE OH VALLEY. BACK MENTIONABLE POPS TO THU NIGHT AND GENERALLY BUMPED THEREAFTER AS UPR TROUGH ELONGATES ACRS THE LAKES.
/ISSUED 1042 AM CST SUN JAN 3 2016/ SKIES BECOMING MOSTLY CLEAR AS UPPER-LEVEL RIDGE REBUILDS ACROSS THE REGION.
230 PM EST SUN JAN 3 2016 LOW PRESSURE WILL MOVE SLOWLY EAST ACROSS SOUTHERN QUEBEC. DRIVING AN ARCTIC COLD FRONT THROUGH THE REGION THIS EVENING.
A CHILLY MORNING IN THE AREAWIDE 40S WILL WARM INTO THE LOWER TO MIDDLE 50S BY 3 PM. CLEARING SKIES WITH THE EASTERN EXIT OF THE UPPER TROUGH AXIS. RESIDENT COOL AND DRY AIR MASS WILL NOT WARM MUCH UNDER THE LOW SUN ANGLE.
1139 AM CST SUN JAN 3 2016 WATER VAPOR SATELLITE THIS MORNING SHOWS ONE SHORT WAVE TROUGH MOVING ACROSS SOUTHERN ONTARIO AND LAKE SUPERIOR WITH ANOTHER UPSTREAM OVER THE ONTARIO/SASKATCHEWAN BORDER. A BAND OF LOW CLOUDS IS DROPPING SOUTH WITH THE TROUGH OF LOW PRESSURE AND WILL COVER THE ENTIRE AREA BY 12Z. SURFACE OBSERVATIONS INDICATE THERE ARE NOT ANY FLURRIES INITIALLY OCCURRING WITH THE LOW CLOUDS. BUT THESE START TO OCCUR ALONG THE MINNESOTA/CANADIAN BORDER AS THE FORCING FROM THE SECOND SHORT WAVE TROUGH STARTS TO INCREASE.
UPPER LOW CONTINUES TO MOVE ACROSS THE PACIFIC NORTHWEST TODAY. AN AREA OF SNOW ASSOCIATED WITH THE LOW IS CURRENTLY MOVING NORTHWARD ACROSS OREGON.
214 PM CST SUN JAN 3 2016 MOSTLY CLEAR SKIES PREVAIL ACROSS THE REGION THIS AFTERNOON AS UPPER-LEVEL RIDGING BUILDS AREAWIDE. TO FALL TO AROUND FREEZING WITH AREAS ACROSS THE INTERSTATE 30 CORRIDOR EXPECTED TO FALL INTO THE UPPER 20S. THE ONLY EXCEPTION WILL BE PORTIONS OF EAST TEXAS WHERE TEMPERATURES MAY REACH THE LOW TO MID 50S.
414 PM EST SUN JAN 3 2016 AN UPPER LEVEL TROUGH WILL DEEPEN OVER THE OHIO VALLEY TONIGHT IN THE WAKE OF A SURFACE COLD FRONT. A LARGE AREA OF HIGH PRESSURE WILL THEN SETTLE OVER THE GREAT LAKES MONDAY NIGHT.
AND SOME LOCATIONS WILL BE A FEW DEGREES COOLER THAN ORIGINALLY FORECAST. SOME LOCATIONS ARE SEEING FULL SUNSHINE AS MONTGOMERY HAS RISEN INTO THE LOWER 50S. THIS IS IN RESPONSE TO THE LONGWAVE TROUGH DIGGING ACROSS THE EASTERN SEABOARD.
THIS MOVES IN BEHIND THE COLD FRONTAL PASSAGE THIS EVENING IN WHICH WINDS SHIFT FROM W TO NRLY.
COULD SEE WEAK NORTHWEST FLOW WHICH WOULD FAVOR SNOWFALL ACCUMULATIONS IN NORTHEAST TENNESSEE, SOUTHWEST VIRGINIA, AND THE SOUTHERN APPALACHIAN MOUNTAINS, MAINLY IN THE HIGHER ELEVATIONS. BUT SOME OF THE HIGHEST LOCATIONS AND PLACES THAT ACCUMULATE SNOW QUICKLY IN NORTHWEST FLOW EVENTS COULD SEE UP TO AN INCH ON THE GROUND BY MONDAY NIGHT.
322 PM CST SUN JAN 3 2016 PLENTY OF SUNSHINE CWA-WIDE HAS FINALLY ARRIVED AS THE LOW CLOUD DECK THAT WAS SLOW TO ERODE/SHIFT SOUTH YESTERDAY. AMPLIFIED UA RIDGING WAS TRANSLATING EAST TO ACROSS THE CENTRAL CONUS WHILE ITS SFC COUNTERPART HAS KEPT SFC WINDS OUT OF THE NORTH. IT WILL ONCE AGAIN RAISE CONCERNS FOR A HEAVY FROST AND/OR FREEZING FOG. PATCHY FREEZING FOG COULD BECOME REALIZED OVERNIGHT. THE UA RIDGE AXIS WILL BE SHIFTING EAST OF THE SOUTHERN PLAINS WHILST 500 MB HEIGHT FALLS OCCUR IN RESPONSE TO AN UA TROUGH APPROACHING FROM THE DESERT SW. AS WELL AS THE RETURN OF COOLER HIGH TEMPS /30S AND 40S/. /29 SERIES OF MODEST UPPER TROUGHS WILL PASS OVER THE AREA IN THE WEEK AHEAD.