Aikyam-Lab/Synoptic-Bench huggingface dataset:
253 PM EST SAT FEB 21 2015 A COLD FRONT OVER MICHIGAN WILL PASS THROUGH THE AREA SUNDAY. CANADIAN HIGH PRESSURE WILL BUILD OVERHEAD EARLY IN THE WEEK.
EVEN THE LATEST 06Z HAS AN 8- 10 INCH SWATH ACROSS THE HIGHWAY 50 CORRIDOR THROUGH 12Z FROM SYRACUSE TO GARDEN CITY. THE SURFACE COLD FRONT WILL BE MOVING QUICKLY SOUTH THIS EVENING, SO A RAPID CHANGE OVER TO SNOW IS EXPECTED DURING THE MID TO LATE EVENING HOURS FROM NORTH TO SOUTH.
429 PM EST SAT FEB 21 2015 PRECIPITATION END TONIGHT AS LOW PRESSURE SYSTEM MOVES EAST. WARM FRONT HAS TRAVERSED ACROSS MUCH OF THE CWA. WHERE WE COULD GLEAN OUT THE LOCATIONS FOR WHERE THE WARM FRONT MADE ITS PASSAGE. COLD FRONT WILL SLIDE ACROSS LATER TONIGHT.
108 PM EST SAT FEB 21 2015 A LOW PRESSURE SYSTEM WILL MOVE THROUGH THE OHIO VALLEY TODAY BRINGING WIDESPREAD SNOW TO THE REGION. A COLD FRONT WILL PUSH THROUGH THE REGION THIS EVENING. WINDS STILL HAVE A SE COMPONENT TO THEM ACROSS THE NORTHERN PORTIONS OF THE FA THEREFORE THESE LOCATIONS ARE STILL IN THE LOW TO MID 20S. FREEZING DRIZZLE. A COLD FRONT WILL PUSH EAST ACROSS THE AREA THIS EVENING.
1034 AM CST SAT FEB 21 2015 COLD FRONT CONTINUES TO SLIDE SOUTHWARD THROUGH NORTH TEXAS THIS MORNING AND IS LOCATED ALONG A LINE FROM NEAR SULPHUR SPRINGS TO WACO TO LAMPASAS. TEMPERATURES ARE ABOUT 15 TO 20 DEGREES COOLER BEHIND THIS INITIAL COLD FRONT BUT MUCH COLDER AIR IS NOW POURING INTO THE UPPER PLAINS AND IS ON TARGET TO MOVE THROUGH OUR AREA DURING THE DAY TOMORROW.
The higher additional amounts will remain over southwest Montana, so will leave the Advisory for above 5500 feet in place through this afternoon. Temperatures are currently running a few degrees warmer there than the model trend. I kept highs there only in the lower to mid 20s because the colder airmass will continue to build into the area from the north. High pressure builds after 00Z with clearing expected.
1233 PM EST SAT FEB 21 2015 A WEAK WARM FRONT WILL REMAIN NEAR THE FORECAST AREA TODAY. A COLD FRONT APPROACHING FROM THE NORTHWEST WILL MOVE THROUGH THE FORECAST AREA SUNDAY AND SUNDAY NIGHT. MOISTURE WILL INCREASE ACROSS THE AREA TONIGHT WITH WEAK ISENTROPIC LIFT AHEAD OF AN APPROACHING COLD FRONT. CLOUD COVER WILL KEEP OVERNIGHT LOWS WARMER THAN THE PAST SEVERAL NIGHTS. RAIN WILL CONTINUE INTO SUNDAY ASSOCIATED WITH CONVERGENCE ALONG THE COLD FRONT. ALTHOUGH THE SURFACE MAY REMAIN DECOUPLED IF THE WEAK WARM FRONT LINGERS IN THE AREA.
THE COLD FRONT SHOULD BE MOVING THROUGH MY SERN ZONES BY EARLY SUNDAY MORNING. PRECIPITATION WILL TAPER OFF TO THE USUAL POST COLD FRONTAL SNOW SHOWERS WHICH WILL MAINLY FAVOR WESTERN AND NORTHERN HIGH TERRAIN.
COULD SEE A LITTLE MIX OF FREEZING RAIN. POSSIBLE TWO DEGREES ABOVE FREEZING BUT MOST OF THE MID STATE WILL BE AT OR SLIGHTLY BELOW FREEZING LATE TONIGHT. THE RAIN AND FOG COULD LEAD TO BLACK ICE LATE TONIGHT AS TEMPS FALL BELOW THE FREEZING MARK.
400 PM CST SAT FEB 21 2015 TEMPERATURES HAVE WARMED NICELY THIS AFTERNOON AHEAD OF AN ARCTIC COLD FRONT THAT WILL PLUNGE SOUTH ACROSS THE AREA LATE TONIGHT AND SUNDAY MORNING.
SOME IMPROVEMENT MAY BE SEEN THIS AFTERNOON UP NORTH AND THIS EVENING FOR CENTRAL AND SOUTHERN SITES AS THE COLD FRONT AND ASSOCIATE PRECIP SHIELD MOVE OFF TO THE EAST.
WITH A SURFACE WARM FRONT EXTENDING FROM NEAR MEMPHIS. THE WARM FRONT WILL SLOWLY LIFT NORTHEASTWARD TODAY. WITH TEMPERATURES EXPECTED TO CLIMB INTO THE LOWER 50S ACROSS THE WEST. HOWEVER IF THE WARM FRONT LIFTS NORTHWARD A LITTLE FASTER THAN FORECAST.
SOUNDINGS ARE SATURATED IN THE LOW LEVELS. ALSO ADJUSTED HIGH TEMPS UP A LITTLE AS WARMER AIR IS POOLING IN FRONT OF THE COLD FRONT. ANOTHER COLD FRONT WILL PUSH THROUGH THIS AFTN WHICH WILL RESULT IN WELL BELOW AVG TEMPS FOR TONIGHT. COLD CANADIAN HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE REGION WITH CAA AND 850MB TEMPS PROGGED TO DROP AROUND -20C IN THE NORTH BY AFTERNOON.
318 PM EST SAT FEB 21 2015 LOW PRESSURE SYSTEM BRINGS WINTRY MIX TONIGHT THROUGH SATURDAY NIGHT. WARM FRONT HAS TRAVERSED ACROSS MUCH OF THE CWA. WHERE WE COULD GLEEN OUT THE LOCATIONS FOR WHERE THE WARM FRONT MADE ITS PASSAGE. COLD FRONT WILL SLIDE ACROSS LATER TONIGHT. A BRIEF PERIOD OF UPSLOPE ENDS THE LOW PRESSURE SYSTEM EVENT FOR THE CENTRAL APPALACHIANS SUNDAY WITH THE LAST OF THE FLAKES FALLING EARLY SUNDAY NIGHT. HIGH PRESSURE BRINGS A DRY PERIOD THROUGH THE REMAINDER OF THE SHORT TERM.
424 PM EST SAT FEB 21 2015 A COLD FRONT WILL PUSH THROUGH THE REGION THIS EVENING.
THE 925MB COLD FRONT LAGS BEHIND IN CENTRAL WI AS OF 3 PM. MODELS ARE SHOWING SLIGHTLY WARMER TEMPS THAN THE PREVIOUS FORECAST.
1140 AM CST SAT FEB 21 2015 COLD FRONT FROM TYR TO TXK TO DRIFT SOUTHEAST THIS AFTERNOON.
330 PM EST SAT FEB 21 2015 HIGH PRESSURE CENTERED TO THE EAST OF THE MID-ATLANTIC COAST WILL CONTINUE TO SLOWLY MOVE EASTWARD AS A COLD FRONT IN THE EAST CENTRAL CONUS CONTINUES TO MOVE EASTWARD TONIGHT AND ON SUNDAY. BUT HIGH PRESSURE WILL CONTINUE TO EXTEND TO THE SOUTHWEST ACROSS THE WESTERN ATLANTIC AND FLORIDA THROUGH THIS PERIOD.
242 PM CST SAT FEB 21 2015 LIGHT SNOW DEVELOPING ACROSS THE HIGH PLAINS THIS AFTERNOON WILL CONTINUE TO EXPAND EASTWARD IMPACTING PORTIONS OF CENTRAL AND SOUTH CENTRAL KANSAS LATE TONIGHT AND INTO SUNDAY. LITTLE RISE IN TEMPERATURES CAN BE EXPECTED WITH HIGHS REMAINING IN THE LOW/MID 20S.
THE COLD FRONT WAS ROUGHLY LOCATED ALONG THE I-30 CORRIDOR. IF ANY LOCALIZED BACKING OF THE LOW LVL WINDS OCCUR AHEAD OF THE FRONT. SCATTERED CONVECTION IS BEGINNING TO DEVELOP JUST SOUTH OF A WARM FRONT ACROSS PORTIONS OF NE TX/SE OK AND SW AR IN THE VCNTY OF THE TXK/ELD TERMINALS. /ISSUED 447 AM CST SAT FEB 21 2015/ NWD MOVG WARM FRONTAL BOUNDARY HAS STALLED OUT FOR TIME BEING. AS SEEN BY WILD TEMP FLUCTUATIONS WITHIN THE VALLEYS AND RIDGES OF THE OUACHITA MTNS. EXPECT TSTMS SOUTH OF I-30 TO POSSIBLY BECOME STG AS SOME DIURNAL HTG TO OCCUR BEFORE COLD FRONTAL PASSAGE.
Otherwise, temperatures today will respond nicely ahead of the approaching cold front from the north, with highs ranging from the 20s north to the 30s south.
224 AM EST TUE FEB 17 2015 INTENSE LOW PRESSURE WILL CONTINUE TO MOVE NORTHEAST OF LABRADOR OVERNIGHT. HIGH PRESSURE ACROSS THE MIDWEST WILL BUILD TOWARD THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. LOW PRESSURE WILL MOVE WELL SOUTH OF THE AREA TUESDAY AFTERNOON. THE WINDS IN THOSE AREAS SHOULD DROP OFF OVER THE NEXT FEW HRS AS WELL W/A HIGH PRES RIDGE MOVING IN FROM THE W.
TEMPERATURES IN THE FLORIDA KEYS ARE IN THE LOWER 70S. LOW PRESSURE CONTINUES TO PULL EASTWARD TOWARDS THE GEORGIA AND CAROLINA COASTLINE. THIS LOW PRESSURE WILL PULL RAPIDLY NORTHEASTWARD TODAY WHILE STRENGTHENING. IT WILL TAKE A WHILE FOR HIGH PRESSURE TO CONSOLIDATE ACROSS THE CENTRAL PORTION OF THE COUNTRY TO DRIVE THIS FRONT THROUGH THE KEYS AND SURROUNDING WATERS.
CAA CONTINUES WITH NORTHERLY WINDS IN WAKE OF A STRONG COLD FRONT THAT PUSHED THROUGH THE REGION EARLIER TODAY. ISOLATED TO SCATTERED SHOWERS ARE CURRENTLY TRACKING EAST NORTHEAST ACROSS SOUTH AND SOUTH CENTRAL TEXAS AS UPPER DISTURBANCES SWING AROUND THE MID/UPPER TROUGH AND UPPER JET STRENGTHENS OVERHEAD.
435 AM EST TUE FEB 17 2015 HIGH PRESSURE WILL WORK THROUGH THE OHIO VALLEY EARLY TODAY PROVIDING DRY WEATHER AND VERY COLD TEMPERATURES. DEEP FULL LATITUDE TROF TO SETTLE INTO THE GREAT LAKES AND EASTERN CONUS. INITIAL S/W AND ASSOCIATED SFC COLD FRONT TO PUSH INTO WEST CENTRAL OHIO BY EVENING. HIGHLY AMPLIFIED MID/UPR LEVEL FLOW PATTERN WITH DEEP TROF SETTLING INTO THE EASTERN CONUS. SFC COLD FRONT OVER NW OHIO AT EVENING TO SWEEP SE THRU ILN/S FA TONIGHT. RANGING FROM THE SINGLE DIGITS NORTH TO THE LOWER TEENS SOUTH.
UNCLEAR WHERE/WHEN BOUNDARY WILL BE OVERRUN BY WARMER AIR ALOFT. PRECIP TYPE WILL BE A QUESTION AS PORTIONS OF CENTRAL KS AND SOUTH CENTRAL KS CLIMB JUST ABOVE FREEZING.
THIS MAY BE A FACTOR LATER WEDNESDAY AS WINDS PICK UP BEHIND AN ARCTIC COLD FRONT DROPPING SOUTH ACROSS THE AREA.
WITH HIGH PRESSURE ACROSS THE NORTHERN ROCKIES EXTENDING SOUTH TOWARDS NORTHERN COLORADO. PATTERN CHANGE WILL GET UNDERWAY AT THE BEGINNING OF THE PERIOD AS A LONGWAVE TROUGH DIGS INTO THE CENTRAL CONUS. EVENTUALLY AN UPPER LOW WILL PINCH OFF OVER THE GREAT BASIN AND A STRONG TROUGH SETTLE INTO THE GREAT LAKES.
UPPER LEVEL TROUGH SUPPORTS SOME DIFFLUENCE ALOFT ENHANCING OVERRUNNING RAIN PATTERN ACROSS THE RGV AT THIS TIME. LIGHT TO MODERATE SHOWERS WILL PREVAIL THROUGH THE NIGHT AND BEGIN TO LOWER INTO MID DAY TUESDAY ONCE THAT UPPER TROUGH MOVES E. STRONG UPPER LEVEL RIDGE BUILDING FROM THE WEST MAINTAINS A NORTHWEST FLOW ALOFT WEDNESDAY SHIFTING THE UPPER TROUGH FURTHER EAST. THIS WILL RESULT IN HIGH PRESSURE SHIFTING EASTWARD WITH NORTHEAST TO EAST FLOW RETURNING.
MAY SEE A FEW ICE PELLETS OR FLURRIES MIXED IN BUT SFC TEMPS WILL REMAIN ABOVE FREEZING SO NO ACCUM.
1233 AM EST TUE FEB 17 2015 LOW PRESSURE IS EXPECTED TO BRING ANOTHER ROUND OF SNOW TO THE REGION OVERNIGHT. LOW PRESSURE CONTINUES TO ADVANCE OFF THE CAROLINA COAST. SNOW WILL CONTINUE TO TAPER OFF FROM WEST TO EAST AS THE AXIS OF A MID LEVEL TROUGH. AND INVERTED SURFACE TROF PASSES EAST. THEN A BUILDING WEAK SURFACE RIDGING SHOULD PROVIDE DRY WEATHER. WITH THE HIGHEST AMOUNTS ALONG THE I80 CORRIDOR AND THE RIDGES.
YET ANOTHER COLD FRONT WILL SWEEP THROUGH LATER TUESDAY AND TUESDAY NIGHT. AS HIGH PRESSURE MOVES SLOWLY IN FROM THE PLAINS. HIGHS WEDNESDAY WILL LIKELY HOLD IN THE LOWER TO MID TEENS AND BRISK NORTHWEST WINDS 15-25 MPH WILL PRODUCE WIND CHILLS BELOW ZERO AT MANY LOCATIONS. THE HIGH WILL MOVE IN OVER WEDNESDAY NIGHT THE FRESH SNOW PACK. THE HIGH WILL RETREAT EAST OF THE FORECAST AREA THU/THU NIGHT ALLOWING WEAK WARM AIR ADVECTION TO POSSIBLY GET GOING OVER THE COLD AIR.
LOWER CIGS MOSTLY IN AROUND LIGHT PRECIP OCCURRING ALONG AND ON THE BACK SIDE OF A STRONG COLD FRONT THAT CURRENTLY MOVING ACROSS SOUTH AL AND THE WESTERN FLORIDA PANHANDLE. THE NEW MODEL GUIDANCE ALSO SUGGESTS MOST OF THE MEASURABLE RAIN MOVING OUT BEFORE FREEZING CONDITIONS. ONE PROBLEM THOUGH COULD BE SOME RESIDUAL MOISTURE FREEZING OVER OVERPASSES AND BRIDGES MOSTLY AFTER MIDNIGHT CONTINUING THROUGH ABOUT 8 AM CST TUE MORNING. WITH STRONG GUSTY WINDS ALSO EXPECTED IN THE WAKE OF THE COLD FRONT HAVE DECIDED TO EXTEND THE WIND ADVISORY UNTIL 6 AM CST TUES MORNING.
AT 00Z TUESDAY A 500MB TROUGH WAS LOCATED FROM SOUTH CENTRAL KANSAS TO WESTERN IOWA. A +150KT 250M JET STREAK WAS NORTHWEST OF THIS UPPER LEVEL TROUGH AND EXTENDED FROM WESTERN MONTANA INTO NORTHERN ALBERTA. FURTHER WEST AN UPPER LEVEL RIDGE AXIS WAS LOCATED ALONG THE BRITISH COLUMBIA. 850MB TEMPERATURES NORTH OF THIS COLD FRONT RANGED FROM -12C IN EASTERN SOUTH DAKOTA TO TO AROUND 20C IN NORTHERN MINNESOTA. TEMPERATURES WILL DROP BELOW FREEZING AGAIN TONIGHT WILL LITTLE CHANGE TO THE OVERALL AIR MASS ACROSS THE WESTERN HIGH PLAINS. HIGHS ARE LIKELY TO CLIMB BACK UP INTO THE 40S(F) ACROSS PORTIONS OF SOUTHWEST KANSAS TUESDAY AFTERNOON AHEAD OF ANOTHER SURGE OF COOLER AIR EXPECTED TO PUSH THROUGH THE AREA TUESDAY AFTERNOON.
130 AM MST TUE FEB 17 2015 NORTHWEST FLOW OVER THE HIGH PLAINS WILL STRENGTHEN TODAY BETWEEN HUDSON BAY LOW AND WEST COAST RIDGE. A WEAK SHORT WAVE TROUGH WILL ALSO MOVE ACROSS SOUTH CENTRAL NEBRASKA AROUND 18Z.
WITH THE COMBINATION OF COOLER TEMPERATURES AND WINDS.
341 AM CST TUE FEB 17 2015 DEEP LONG WAVE TROUGH NOW ANCHORED IN ACROSS THE EASTERN U. DEEP 850 MB THERMAL TROUGH AXIS WILL BE LOCATED OVER EASTERN TN DURING THE DAY.
A HIGH PRESSURE RIDGE WILL BRIEFLY BUILD IN OVERNIGHT WITH MAINLY CLEAR SKIES AND COLD TEMPERATURES.
855 PM PST Mon Feb 16 2015 Dry weather with above normal temperatures will continue through the week under high pressure. High pressure ridge will continue over the area again for Tuesday. Weak disturbance moving south over the top of the ridge may bring some high clouds to the area. The ridge of high pressure will remain in place with dry and warmer than normal temperatures through the period. On Wednesday a weak disturbance will move by well to the north and will flatten out the ridge but have little effect on temperatures.
328 AM CST TUE FEB 17 2015 EVENING UPPER AIR ANALYSIS SHOWS NORTHWESTERLY FLOW ALOFT WITH AN UPSTREAM AMPLIFIED RIDGE EXTENDING OVER THE PACIFIC COAST. A SECONDARY WAVE WAS NOTED OVER NORTHEASTERN WYOMING AND WILL BEGIN TO AFFECT THE AREA THIS AFTERNOON AS A STRONG SFC COLD FRONT DROPS THROUGH THE CWA.
When clouds move back in, temperatures jump back up into the lower and middle teens. As has been advertised, Wednesday and Wednesday night will be the coldest period of the week as arctic high pressure moves over the region.
SOME ADDITIONAL HIGH CLOUDS DROPPING SOUTH ON THE EASTERN FLANK OF THE RIDGE ACROSS PARTS OF NEVADA. THIS AFTERNOON THE HIGH AT TIA WAS 73 DEGS. THESE LIGHT WINDS COULD SETUP SOME FOG DEVELOPMENT THIS MORNING THOUGH GIVEN THE HIGH CLOUDS SPREADING IN WILL LIKELY REMOVE MENTION FROM TAFS WITH THE 06Z ISSUANCE. THE UPPER PATTERN THRU FRI WILL BE CHARACTERIZED WITH A RIDGE NEAR THE WEST COAST AND A TROUGH OVER THE ERN CONUS.
305 AM CST TUE FEB 17 2015 LONGWAVE TROUGHING CONTINUES TO DOMINATE THE CONUS. THE AXIS OF THE TROUGH CURRENTLY STRETCHES FROM THE COLD CORE LOW OVER ONTARIO. THE TROUGH AXIS IS CURRENTLY SHIFTING EAST ACROSS TEXAS. MUCH OF THIS IS SUBLIMATING OR EVAPORATING PRIOR TO REACHING THE SURFACE DUE TO DRY CONDITIONS IN THE LOWER LEVELS OF THE ATMOSPHERE. WITH TEMPERATURES AT OR BELOW FREEZING ACROSS MUCH OF THE REGION. WE WILL EXPERIENCE A GRADUAL WARM-UP THIS WEEK AS THE UPPER TROUGH SHIFTS EASTWARD TO THE EAST COAST. AND AN UPPER RIDGE BUILDS IN FROM THE WEST.
1239 AM EST TUE FEB 17 2015 AN INVERTED SURFACE TROF WILL MOVE THROUGH THE EASTERN GREAT LAKES TONIGHT.
TEMPERATURES THERE ARE IN THE LOWER 40S. OVERNIGHT LOWS TO COOL DOWN TO THE FREEZING MARK ACROSS THE NORTHERN PORTION OF THE AREA. TEMPERATURES SHOULD BE ABOVE FREEZING FOR JUST RAIN.
VERY LIGHT SNOW/FLURRIES AHEAD OF FIRST OF TWO SHORT WAVE TROUGHS TO AFFECT AREA MOVING THROUGH AND SHOULD CLEAR TO THE EAST OF THE FORECAST AREA AROUND/SHORTLY AFTER 12Z. BUT COLDEST AIR WILL HOLD OFF UNTIL PASSAGE OF SECOND TROUGH TONIGHT. LOOKING AT ANOTHER LIGHT SNOW EVENT WITH SECOND SHORT WAVE TROUGH BEGINNING IN THE NW EARLY THIS EVENING AND SPREADING ACROSS THE REST OF THE CWA THROUGH THE LATE EVENING/EARLY OVERNIGHT.
925 MB TEMPS TANK EVEN LOWER AS THERE REMAINS JUST ENOUGH OF A PRESSURE GRADIENT WITH THE HIGH BUILDING IN.
1104 PM CST MON FEB 16 2015 FOR 06Z TAFS /ISSUED 932 PM CST MON FEB 16 2015/ THE WINTRY MIX OF LIGHT SNOW/SLEET/FREEZING RAIN CONTINUES TO MOVE EAST ACROSS THE CWA. DUE TO ALL OF THE STANDING WATER ON ROADS AND TEMPS DROPPING INTO THE LOW 20S. ALSO WITH LOW CLOUDS CANT RULE OUT SOME PATCHY FREEZING DRIZZLE WHICH COULD PRODUCE LIGHT ICE ACCUMULATIONS. ESPECIALLY ON BRIDGES/OVERPASSES/TREES/POWERLINES. HOWEVER WITH LOW CLOUDS MOVING ACROSS THE TN VALLEY THERE WILL BE CHC OF SOME PATCHY FREEZING DRIZZLE UNTIL ARND 15Z.
A SYSTEM WILL DROP SOUTH FROM UTAH INTO NORTHERN ARIZONA TONIGHT USHERING IN A PUSH OF COOLER AIR THAT WILL BE SHORT-LIVED.
EVENTUALLY THE FLOW GOES ONSHORE AS UPPER LOW AND WEAK SFC REFLECTION APPROACHES TONIGHT AND MOVES THROUGH TOMORROW. UPPER LOW WITH COLD CORE FOLLOWS FOR WEDNESDAY ALONG WITH VERY FRIGID REINFORCING SHOT OF ARCTIC AIR.
157 AM PST TUE FEB 17 2015 A RIDGE OF HIGH PRESSURE WILL EXPAND OVER NORTHERN CALIFORNIA AND NEVADA THROUGH MIDWEEK, CONTINUING THE DRY CONDITIONS AND LIGHT WINDS.
1141 PM EST MON FEB 16 2015 AN INVERTED SURFACE TROF WILL MOVE THROUGH THE EASTERN GREAT LAKES TONIGHT.
THERE COULD BE SOME LIGHT FREEZING RAIN IMPACTING KMCB BETWEEN NOW AND 09Z AND A TEMPO GROUP HAS BEEN ADDED TO REFLECT THIS RISK.
238 AM MST TUE FEB 17 2015 STRONG HIGH PRESSURE WILL GRADUALLY SHIFT BACK OVER THE DESERT SOUTHWEST THROUGH THE WEEK. HIGH PRESSURE WILL EVENTUALLY BREAK DOWN ALLOWING FOR SLIGHTLY COOLER TEMPERATURES DURING THE WEEKEND. THE NEXT SEVERAL DAYS WILL BE QUITE PLEASANT ACROSS THE REGION WITH A PACIFIC RIDGE TAKING OVER AND GRADUALLY WARMING TEMPERATURES.
Southwest Montana should see somewhat warmer temperatures on Tuesday with mostly clear to partly cloudy skies.
THE MAIN CONCERN WILL BE STRONG COLD ADVECTION SENDING TEMPERATURES WELL BELOW FREEZING NOT LONG AFTER RAIN COMES TO AN END. NORTHWEST WINDS WILL REMAIN ELEVATED OVERNIGHT BEHIND A COLD FRONT.
TEMPERATURES WILL DROP BELOW FREEZING AGAIN TONIGHT WILL LITTLE CHANGE TO THE OVERALL AIR MASS ACROSS THE WESTERN HIGH PLAINS. HIGHS ARE LIKELY TO CLIMB BACK UP INTO THE 40S(F) ACROSS PORTIONS OF SOUTHWEST KANSAS TUESDAY AFTERNOON AHEAD OF ANOTHER SURGE OF COOLER AIR EXPECTED TO PUSH THROUGH THE AREA TUESDAY AFTERNOON. WEDNESDAY: ON WEDNESDAY, HIGH PRESSURE WILL SHIFT OFF TO THE EAST ACROSS THE CENTRAL PLAINS. NO PRECIPITATION IS EXPECTED AS SUBSIDENCE REMAINS IN CONTROL BEHIND THE PASSING SYNOPTIC TROUGH.
AND FREEZING RAIN ACROSS THE CAROLINAS. FOLLOWED BY THE PASSAGE OF AN ARCTIC COLD FRONT ON WEDNESDAY. WILL START TUESDAY NIGHT OFF WITH WINDS SHIFTING MORE SOUTHWESTERLY AHEAD OF OUR NEXT ARCTIC COLD FRONT. OVERNIGHT LOW TEMPERATURES WILL RANGE FROM THE LOW TEENS ACROSS THE MOUNTAINS. WHICH WILL PUSH WIND CHILL TEMPERATURES INTO THE LOW SINGLE DIGITS ACROSS THE MOUNTAINS. WOULD NOT BE SURPRISED TO SEE 50 MPH GUSTS ACROSS THE HIGHER RIDGES WEDNESDAY EVENING AND WEDNESDAY NIGHT. WINDS WILL COME AROUND TO THE NORTHWEST AND CEILINGS WILL BEGIN TO LIFT EAT OF THE BLUE RIDGE.
but expect a drop to below freezing by 3 am across the northern half of the area. a few bridges and overpasses could see some ice by morning. Accumulations will remain very light, with most areas experiencing a dusting at best, with the most likely areas being the higher terrain over the western Big Country and Concho Valley (i. Any snow that develops will come to an end by mid/late morning with skies clearing from west to east as large scale subsidence overspreads the area in the wake of the departing trough.
SHOWERS WILL LINGER ALONG THE DIVIDE TONIGHT DESPITE THE TROUGH AXIS SHIFTING EAST OF THE AREA THIS EVENING.
106 AM EST TUE FEB 17 2015 INTENSE LOW PRESSURE WILL CONTINUE TO MOVE NORTHEAST OF LABRADOR OVERNIGHT. HIGH PRESSURE ACROSS THE MIDWEST WILL BUILD TOWARD THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. LOW PRESSURE WILL MOVE WELL SOUTH OF THE AREA TUESDAY AFTERNOON.
HIGH AMPLITUDE UPPER RIDGE TO REMAIN CENTERED ALONG THE U. HAVE ALSO SHRUNK THE AREAS POTENTIALLY AFFECTED BY FOG (MAINLY LOCALIZED GROUND FOG) TO THE LOWER BASIN BELOW 600 FT MSL.
125 AM EST TUE FEB 17 2015 INTENSE LOW PRESSURE WILL CONTINUE TO MOVE NORTHEAST OF LABRADOR OVERNIGHT. HIGH PRESSURE ACROSS THE MIDWEST WILL BUILD TOWARD THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. LOW PRESSURE WILL MOVE WELL SOUTH OF THE AREA TUESDAY AFTERNOON.
SOME FREEZING FOG POSSIBLE AT TYS AND TRI THROUGH DAY BREAK.
331 AM CST TUE FEB 17 2015 SURFACE COLD FRONT ALREADY IN SOUTHERN IOWA EARLY THIS MORNING WITH A SECONDARY TROUGH AND PV ANOMALY LOOKING TO PUSH ACROSS IOWA THROUGH MIDDAY TODAY. ADDED FLURRIES OVER THE WEST TO SOUTH TODAY WITH THE LOW STRATUS AND NEAR SURFACE SNOW GROWTH REGION THROUGH 18Z. TONIGHTS 03Z SUBJECTIVE ANALYSIS SHOWS A WEAK COLD FRONT MOVING THROUGH CENTRAL IA WITH A STRONGER COLD FRONT LOCATED OVER CENTRAL MN TONIGHT. TEMPERATURES BEHIND THE SECOND BOUNDARY SHOW A MARKED DROP OFF BUT THIS IS NOT THE TRUE ARCTIC COLD FRONT.
AND FREEZING RAIN ACROSS THE CAROLINAS. FOLLOWED BY THE PASSAGE OF AN ARCTIC COLD FRONT ON WEDNESDAY. WILL START TUESDAY NIGHT OFF WITH WINDS SHIFTING MORE SOUTHWESTERLY AHEAD OF OUR NEXT ARCTIC COLD FRONT. OVERNIGHT LOW TEMPERATURES WILL RANGE FROM THE LOW TEENS ACROSS THE MOUNTAINS. WHICH WILL PUSH WIND CHILL TEMPERATURES INTO THE LOW SINGLE DIGITS ACROSS THE MOUNTAINS. WOULD NOT BE SURPRISED TO SEE 50 MPH GUSTS ACROSS THE HIGHER RIDGES WEDNESDAY EVENING AND WEDNESDAY NIGHT. SLEET AND FREEZING DRIZZLE AS FAR NORTH AS KBCB. CEILINGS WILL BEGIN TO LIFT EAST OF THE BLUE RIDGE BY LATE AFTERNOON.
LOW PRESSURE OVER AL WILL MOVE EAST-NORTHEASTWARD AWAY FROM THE MIDSOUTH TONIGHT. A SPECIAL WEATHER STATEMENT WAS ALSO SENT REGARDING THE HAZARDOUS BELOW FREEZING TEMPERATURES AND ICE FROM EARLIER WINTRYPRECIPITATION CONSISTING OF A VARIETY OF SLEET. SNOW AND FREEZING RAIN DEPENDING ON THE LOCATION WILL CAUSE HAZARDOUS ROAD CONDITIONS ACROSS MOST OF THE AREA TONIGHT INTO AT LEAST TUESDAY. ANY WATER ON ROADS WILL FREEZE TONIGHT AS TEMPERATURES DROP WELL BELOW FREEZING. LOW TEMPERATURES SHOULD RANGE FROM THE LOWER TEENS NORTH TO AROUND 20 DEGREES FAR SOUTH.
WEATHER MAP EARLY THIS MORNING HAD A COLD FRONT MOVING SOUTH THROUGH SOUTHERN WI/NORTHERN IA. VIGOROUS SNOW SHOWER ACTIVITY WAS NOTED AHEAD OF THIS COLD FRONT AS IT MADE PASSAGE ACROSS THE ARX FORECAST DURING THE LATE EVENING HOURS. THEN BECOMING MOSTLY CLOUDY AGAIN LATER THIS AFTERNOON AHEAD OF ANOTHER ARCTIC COLD FRONT DROPPING INTO THE REGION. MODELS SHOW A VIGOROUS MID-LEVEL PV- ANOMALY DRIVING THE COLD FRONT SOUTH THROUGH THE REGION AS 0-2KM LAPSE RATES INCREASE INTO THE 7-9C/KM RANGE. HIGH PRESSURE/REINFORCING ARCTIC AIRMASS BUILDS INTO THE REGION WEDNESDAY/WEDNESDAY NIGHT WITH HIGH TEMPERATURES STRUGGLING INTO THE SINGLE DIGITS BELOW AND ABOVE ZERO RANGE. CLEARING SKIES WEDNESDAY NIGHT WITH THE RIDGE OF OF HIGH PRESSURE BUILDING OVERHEAD WILL ALLOW TEMPERATURES TO DIP INTO THE TEENS BELOW ZERO.
SURFACE RIDGING BUILDS INTO THE AREA FROM THE WEST FOR A BRIEF VISIT TODAY AND TONIGHT. UPPER TROUGH DEEPENS THROUGH THE TN VALLEY TONIGHT. MOST AREAS WILL REMAIN BELOW FREEZING TODAY.
VERY STRONG COLD AIR ADVECTION WILL CONTINUE THROUGH TODAY AS HIGH ARCTIC HIGH PRESSURE BUILDS IN. THE HIGH PRESSURE CENTER IS FORECAST TO BE ACROSS WESTERN AND CENTRAL NORTH DAKOTA BY EARLY TOMORROW MORNING.
405 AM EST TUE FEB 17 2015 LOW PRESSURE WILL MOVE OFF THE COAST TODAY. EASTERN CONUS UPPER LEVEL TROUGH AMPLIFIES TONIGHT AND WEDNESDAY WITH RESULTING STRENGTHENING COLD ADVECTION. LIGHT WINDS TONIGHT SO TEMPERATURES WILL FALL BELOW FREEZING.
A LARGE WARM RIDGE RUNS UP THE NORTH AMERICAN COAST FROM CALIFORNIA TO BRITISH COLUMBIA AND TERMINATES IN THE GULF OF ALASKA. BACK DOOR COLD FRONT WILL CONTINUE TO MARCH TO THE SOUTHWEST AND NESTLE ITSELF UP AGAINST THE FRONT RANGE. EXPECT NEAR SEASONAL TEMPERATURES BELOW FREEZING.
WINDS TO BECOME SOUTHWEST AT 5 KNOTS AFTER 18/00Z AS HIGH PRESSURE SHIFTS SOUTH OF THE REGION.
332 AM EST TUE FEB 17 2015 HIGH PRESSURE WILL BRIEFLY BUILD IN TODAY BEFORE MID WEEK DISTURBANCES USHERS IN SNOW SHOWERS CHANCES AND FRIGID TEMPERATURES. SNOW HAS ENDED AS LOW PRESSURE EXITS THE REGION. CLEARING SHOULD WORK IN ACROSS MUCH OF THE AREA THIS MORNING AS HIGH PRESSURE BUILDS IN. THOUGH UPSLOPE FLOW IN THE RIDGES MAY KEEP A FEW MORE CLOUDS THERE. CLOUDS SHOULD INCREASE AGAIN THIS AFTERNOON AHEAD OF AN APPROACHING COLD FRONT. THE COLD FRONT WILL CONTINUE TO ADVANCE TOWARD THE REGION TONIGHT WITH INCREASING CHANCES FOR SNOW SHOWERS LATE. COMBINED WITH AN ADVANCING UPPER TROUGH.
THIS MAY LEAVE A WINDOW FOR A FEW SNOW FLURRIES AS THE MAIN UPPER TROF SWINGS EWD. /ISSUED 400 PM CST MON FEB 16 2015/ FAST-MOVING COLD FRONT HAS SWEPT EAST OF THE REGION THIS AFTERNOON WITH SOME LINGERING RAINFALL STILL OVER MUCH OF N LA AND EXTENDING WWD ACROSS PARTS OF E TX SOUTH OF I-20. POST-FRONTAL TEMPERATURES HAVE HELD NEARLY STEADY ALL AFTERNOON FROM NEAR FREEZING OVER OUR FAR NORTH TO MOSTLY THE MID AND UPPER 30S FARTHER SOUTH. BRISK NW WINDS WILL BEGIN TO DROP OFF THIS EVENING AS THE PRESSURE GRADIENT RELAXES WITH HIGH PRESSURE AT SFC MOVING INTO NRN/WRN TX. WE WILL SEE A BRIEF RETURN TO S/SW WINDS LATE TUESDAY INTO EARLY WEDNESDAY AHEAD OF ANOTHER COLD FRONT.
359 AM EDT TUE MAR 10 2015 HIGH PRESSURE CENTERED WELL OFF THE SOUTHEAST COAST WILL CIRCULATE WARM AND MOIST AIR INTO THE FORECAST AREA AHEAD OF A FRONTAL SYSTEM SLOWLY APPROACHING FROM THE NORTH AND WEST.