Aikyam-Lab/Synoptic-Bench huggingface dataset:
341 PM CDT MON OCT 26 2015 BENIGN AND WARMER WEATHER EXPECTED TONIGHT AND TUESDAY. UPPER FLOW WILL VEER FROM SOUTHWESTERLY TONIGHT TO WEST-NORTHWEST FOLLOWING THE NEXT MODEST MID LEVEL TROUGH PASSAGE EARLY TUESDAY. TO THE SOUTH OF SHARPER UPPER TROUGH PASSING OUT OF NORTHERN ROCKIES INTO CENTRAL ROCKIES AND HIGH PLAINS.
TONIGHT THROUGH TUESDAY AS ONE LOW PRESSURE TROUGH PASSES TO THE EAST. ANOTHER TROUGH WILL MOVE IN BEHIND IT TONIGHT AND TUESDAY WITH A STRONGER COLD FRONT. PARTIAL CLEARING WILL DEVELOP BETWEEN THE TROUGHS. WITH PERIODS OF SW RIDGING AND TROFFING AFFECTING THE FA THRU THE ENTIRE FCST PERIOD. BACKSIDE OF THE TROF AND LATEST EMBEDDED SW MOVING OUT OF THE FA TO THE ESE.
ZONAL H30-H20 JET OVER THE NE CONUS WILL PULL AN H100-H70 RIDGE AXIS FROM THE ERN CONUS INTO THE W ATLC. POSITION OF THE RIDGE WILL DEFLECT A STORM SYSTEM OVER THE LWR MS VALLEY INTO THE MID SOUTH WHERE IT WILL STEADILY WEAKEN AS IT MERGES WITH A BROAD TROF OVER THE ROCKY MTNS/HIGH PLAINS. INTERACTION BETWEEN THE RIDGE AND THE STORM SYSTEM WILL ALLOW THE SFC/LOW LVL PGRAD TO BECOME VERTICALLY TILTED. A FRONTAL TROF TRAILING FROM THE STORM CIRCULATION CENTER TO THE YUCATAN PENINSULA WILL LOSE MUCH OF ITS WRLY PUSH AS THE LOW LIFTS N AND WEAKENS. RIDGING OVER THE W ATLC SYSTEM WILL FURTHER SLOW THE ADVANCE OF THE FRONT AS WELL AS THE MODIFICATION OF THE DRY MID LYR ASSOCD WITH A SHARP SUBSIDENCE INVERSION IN THE H85-H60 LYR.
137 PM EDT MON OCT 26 2015 HIGH PRESSURE EXTENDING OVER THE AREA TODAY WILL MOVE EAST TO NEW ENGLAND TONIGHT AND EARLY TUESDAY.
THIS AS A SHORT WAVE TROUGH SWINGS THROUGH NORTHEAST WYOMING AND SOUTHEAST MONTANA.
The temperature is still at freezing at KMRF, but should rise above freezing rapidly as the sun waxes. /issued 259 AM CDT MON OCT 26 2015/ Brief upper ridging over the area today will provide mild wx for W TX and SE NM. A weak trough will move across NM and the TX Panhandle tonight but have little affect on the region.
206 PM EDT MON OCT 26 2015 DRY CONDITIONS AND LIGHT EASTERLY WINDS WILL PERSIST TODAY INTO TONIGHT AS A RIDGE OF HIGH PRESSURE SHIFTS EAST THROUGH THE GREAT LAKES REGION.
402 PM CDT MON OCT 26 2015 MAIN FORECAST CONCERNS REVOLVE AROUND THE EVOLUTION OF AN UPPER-LEVEL LOW PRESSURE SYSTEM LATE THIS WEEK INTO THE WEEKEND AND RESULTANT RAIN CHANCES. TEMPERATURES WILL BE WARMER TONIGHT THAN THE PAST COUPLE. PUSHING A COLD FRONT SOUTH THROUGH THE AREA.
DEEP CLOSED LOW OVER THE LOWER MISSISSIPPI VALLEY WILL OPEN AS IT LIFTS SLOWLY NORTH. STAYED CLOSE GUIDANCE TEMPS ALTHOUGH THE FOEHN WIND COULD LEAD TO MAX TEMPS ABOUT A CATEGORY WARMER FROM AROUND KNOXVILLE NORTHEAST THROUGH THE TRI-CITIES.
A WEAK UPPER LEVEL TROUGH PASSING OVER THE AREA THIS EVENING HAS BROUGHT BTWN A TRACE TO JUST UNDER AN INCH OF SNOW TO THE SOUTHERN AND EASTERN COUNTIES OF THE COMBINED PANHANDLES. AS THE TROUGH EXITS HEADS NORTHEAST OVERNIGHT TONIGHT. THERE IS THE POTENTIAL FOR PATCHY FREEZING FOG TO FORM ALONG THE CAPROCK DURING THE OVERNIGHT AND EARLY MORNING HOURS. HAVE UPDATED THE GRIDS TO INCLUDE THE MENTION OF PATCHY FREEZING FOG AND ADJUSTED NEAR TERM GRIDS TO REFLECT PRESENT TRENDS. A FAST MOVING UPPER LEVEL SYSTEM IS MOVING ACROSS THE HIGH PLAINS THIS EVENING WITH A BAND OF SNOW SHOWERS WEST AND SOUTHWEST OF KAMA MOVING NORTHEAST. OPEN WAVE TROUGH OVER THE WESTERN U.
1038 PM EST TUE DEC 29 2015 A WARM FRONT WILL REMAIN IN THE AREA TONIGHT. A COLD FRONT WILL PSUH THROUGH THE REGION WEDNESDAY EVENING.
UNSETTLED PATTERN WILL CONTINUE WITH BROAD UPPER TROF OVERHEAD.
622 PM EST TUE DEC 29 2015 LOW PRESSURE WILL KEEP UNSETTLED WEATHER IN THE REGION THROUGH WEDNESDAY. GREAT LAKES LOW PRESSURE AND PERSISTENT LOW LVL MOISTURE SHOULD MAINTAIN A STRATOCU LYR TONIGHT. COLD ADVECTION IS PROGGED TO BEGIN BY WED NIGHT AS AN UPPER TROUGH TRACKS SLOWLY E FROM THE PLAINS. BROAD UPPER TROUGHING IS PROGGED TO PERSIST ACRS THE ERN CONUS THROUGH THE WEEKEND KEEPING SEASONAL TEMPS IN THE FCST AND SLGT TO LOW CHC POPS N OF I 80. MODERATING TEMPS AND DRY WEATHER IS EXPECTED UNDER BUILDING RIDGING BY ERLY IN THE WEEK.
Thicknesses and 850 mb temperatures remain essentially stagnant, ensuring afternoon highs remain well below normal, struggling to reach freezing.
HIGH PRESSURE CONTINUES TO REIGN WITH THE EXPECTATION THAT ITS INFLUENCE WILL HOLD. LEAVING OUR AREA IN THE WARMER.
PATCHY LIGHT DRIZZLE ALONG THE COASTAL REGION IS EXPECTED TO TRANSITION TO -DZ/-RA OVERNIGHT AS A SECOND SURGE OF HIGH PRESSURE MOVES INTO THE AREA. COVERAGE THEN BECOMES FOCUSED CLOSER TO THE COAST TOMORROW AS A WEAK COASTAL TROF DEVELOPS.
616 PM EST TUE DEC 29 2015 LOW PRESSURE OVER LAKE HURON WILL MOVE ACROSS SOUTHERN ONTARIO TONIGHT. A WEAK AREA OF HIGH PRESSURE WILL BE OVER THE LOWER OHIO VALLEY TONIGHT. LOW PRESSURE WILL SLOWLY SLIDE EASTWARD ACROSS SOUTHERN ONTARIO TONIGHT. THIS WILL ALLOW HIGH PRESSURE TO RIDGE INTO THE OHIO RIVER VALLEY. AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE REGION ON WEDNESDAY WHICH WILL HELP TO KEEP IT CLOUDY.
755 PM MST TUE DEC 29 2015 ANOTHER PUNCH OF COLD AIR WILL MOVE INTO THE REGION TONIGHT LEADING TO ANOTHER ROUND OF NEAR-FREEZING TEMPERATURES IN OUTLYING LOWER DESERTS AREAS WEDNESDAY MORNING. /216 PM MST TUE DEC 29 2015/ ANOTHER COLD AIRMASS ON THE BACKSIDE OF A TROUGH WILL CONTINUE TO SETTLE INTO THE AREA AND UNDER CALM/SUBSIDENT CONDITIONS TONIGHT. PROMOTING ANOTHER ROUND OF NEAR-FREEZING TO FREEZING TEMPERATURES FOR THE OUTLYING DESERT LOCALES. THE COOLEST LOCATIONS ACROSS SOUTHWEST AND SOUTH-CENTRAL AZ COULD DIP TO JUST BELOW FREEZING DURING THE EARLY WEDNESDAY MORNING HOURS. WITH THE SUBURBS AROUND THE PHX METRO DROPPING INTO THE LOW TO MID 30S. FLOW ALOFT THROUGH THE SOUTHWEST WILL QUICKLY TRANSITION TO ZONAL BY LATE WEDNESDAY AS LOWERED HEIGHT ANOMALIES/LONGWAVE TROUGHING REMAINS OVER THE CONUS.
SUBSIDENCE WILL FOLLOW AND IT APPEARS THERE IS DECENT AGREEMENT IN THE BL ASSESSMENT TONIGHT ACROSS C AND SW OK, AND PORTIONS OF WESTERN NORTH TEXAS, FOR SOME PATCHY FREEZING FOG TO DEVELOP.
740 PM EST TUE DEC 29 2015 LOW PRESSURE SOUTH OF CAPE COD WILL RACE EAST INTO THE MARITIMES THIS EVENING. WEAK HIGH PRESSURE WILL BUILD OVER THE AREA LATER TONIGHT AND WEDNESDAY.
549 PM CST TUE DEC 29 2015 /00Z TAFS/ WATER VAPOR IMAGERY SHOWS AN UPPER TROUGH MOVING THROUGH THE SOUTHERN PLAINS THIS EVENING.
18Z SFC DATA HAS LOW PRESSURE OVER LAKE HURON WITH A TROF EXTENDING WEST FROM THE LOW INTO NORTHERN IOWA.
The mid level clouds are indicated to move north to along and east of a Sonora to Brownwood line this evening, before pushing eastward as an upper trough moves over. The upper trough will also bring some mid/high level clouds to Big Country this evening.
925 PM EST TUE DEC 29 2015 LOW PRESSURE WILL KEEP UNSETTLED WEATHER IN THE REGION THROUGH WEDNESDAY. GREAT LAKES LOW PRESSURE AND PERSISTENT LOW LVL MOISTURE SHOULD MAINTAIN A STRATOCU LYR TONIGHT. COLD ADVECTION IS PROGGED TO BEGIN BY WED NIGHT AS AN UPPER TROUGH TRACKS SLOWLY E FROM THE PLAINS. BROAD UPPER TROUGHING IS PROGGED TO PERSIST ACRS THE ERN CONUS THROUGH THE WEEKEND KEEPING SEASONAL TEMPS IN THE FCST AND SLGT TO LOW CHC POPS N OF I 80. MODERATING TEMPS AND DRY WEATHER IS EXPECTED UNDER BUILDING RIDGING BY ERLY IN THE WEEK.
AND INDEED DEEP LOWER TO MID TROPOSPHERIC RIDGING ACROSS THE WESTERN ATLANTIC THROUGH SOUTHERN FLORIDA PENINSULA REMAINS ROBUST. MODERATE TO FRESH BREEZES WILL CONTINUE UNTIL THE STRONG HIGH PRESSURE IN THE WESTERN ATLANTIC RETREATS A BIT EASTWARD.
HIGH PRESSURE WILL PROVIDE DRY CONDITIONS THE REST OF THE WEEK AND INTO THE WEEKEND. THIS WILL RESULT IN COLD NEAR FREEZING TEMPERATURES OVERNIGHT. A SHORT WAVE TROUGH OFF THE PACNW COAST IS EXPECTED TO DIVE SOUTHEAST OVER NCAL TONIGHT AND MOVING INTO THE GREAT BASIN WEDNESDAY. SOME LIGHT SNOW WILL BE POSSIBLE OVER THE HIGHER TERRAIN OF YOSEMITE PARK AREA ON WEDNESDAY MORNING.
201 PM PST TUE DEC 29 2015 HIGH PRESSURE WILL PROVIDE DRY CONDITIONS THE REST OF THE WEEK AND INTO THE WEEKEND. THIS WILL RESULT IN COLD NEAR FREEZING TEMPERATURES OVERNIGHT. A SHORT WAVE TROUGH OFF THE PACNW COAST IS EXPECTED TO DIVE SOUTHEAST OVER NCAL TONIGHT AND MOVING INTO THE GREAT BASIN WEDNESDAY. SOME LIGHT SNOW WILL BE POSSIBLE OVER THE HIGHER TERRAIN OF YOSEMITE PARK AREA ON WEDNESDAY MORNING.
901 PM EST TUE DEC 29 2015 A WARM FRONT WILL REMAIN IN THE AREA TONIGHT. A COLD FRONT WILL PSUH THROUGH THE REGION WEDNESDAY EVENING.
The main trof currently stretches across the four-corners region into Mexico. This leading s/w is expected to help spread moisture newd into the area and shud allow at least some light snow ahead of the main trof. With the main trof becoming negatively tilted and stronger with both the 00z and 12z run from today, have higher confidence that wrn and nrn portions of the CWA will see an accumulating snow event tonight and into early Wed morning. Will have to wait and see how the leading s/w and the deeper trof phase and how much moisture is available with evening raobs.
UPPER LOW CENTER WILL TRACK S-SE FROM THE IDAHO PANHANDLE TO EASTERN IDAHO/WESTERN WYOMING THROUGH WEDNESDAY. THE LOW WILL SUPPORT LIGHT SNOW SHOWERS OR FLURRIES IN SW IDAHO. MAINLY IN THE HIGHER ELEVATIONS. SCATTERED TO NUMEROUS LOCALLY IFR SNOW SHOWERS MAINLY 06Z-18Z HARNEY AND SOUTHERN MALHEUR COUNTIES AND THE HIGHLANDS SOUTH OF THE SNAKE RIVER VALLEY.
THIS IS DISPLACED FROM THE COLD FRONT WHICH EXTENDED FROM NRN GA THRU SERN AL INTO THE WRN FL PANHANDLE. FORTUNATELY, IT APPEARS THAT THE CONVECTIVE POTENTIAL WILL BE GREATEST FURTHER S-SE OF OUR FORECAST AREA WHERE LOW LEVEL CONVERGENCE ALONG THE WARM FRONT AND SFC WAVE EXISTS.
548 PM CST TUE DEC 29 2015 FLURRIES AND LIGHT SNOW REMAINED ACROSS FAR NORTH CENTRAL NEBRASKA TODAY IN ASSOCIATION WITH A TROUGH EXTENDING FROM THE GREAT LAKES LOW PRESSURE INTO THE MISSOURI RIVER VALLEY. THE BASE OF A TROUGH WAS ROUNDING THE DESERT SOUTHWEST. THE TROUGH AT 500HPA LIFTS NORTH INTO THE SOUTHERN/CENTRAL PLAINS. CLOUD COVER ASSOCIATED WITH THIS SYSTEM WILL PLAY A TRICKY ROLE IN THE LOW TEMPS. UPPED MAX TEMPS A DEGREE TOWARD THE HIGH END OF GUIDANCE AS THE MODELS UNDERESTIMATED TUESDAYS HIGHS. WEAK ISENTROPIC DOWNGLIDE MAY HELP WITH WARMER TEMPS.
A COLD FRONT WILL APPROACH CENTRAL NC FROM THE WEST WEDNESDAY.
419 PM MST TUE DEC 29 2015 AN UPPER LEVEL TROUGH WILL MOVE THROUGH THE CENTRAL PLAINS TONIGHT FOLLOWED BY WESTERLY FLOW WEDNESDAY. DYNAMICS FROM THE UPPER TROUGH WILL MOVE JUST TO THE SOUTH OF THE FA THIS EVENING.
/ISSUED 237 PM CST TUE DEC 29 2015/ ANOTHER COOL DAY ACROSS THE FOUR STATE REGION TODAY AS A STRONG INVERSION IN THE LOWER LEVELS OF THE ATMOSPHERE HAS KEPT THE CLOUD COVER IN PLACE AND WEAK TO NEUTRAL COLD AIR ADVECTION FROM THE NORTHEAST HAS KEPT TEMPERATURES IN THE 40S AREAWIDE TODAY. PERSISTENT UPPER LEVEL TROUGH ACROSS THE INTERMOUNTAIN WEST WILL EJECT A WEAK DISTURBANCE INTO THE SOUTHERN PLAINS OVERNIGHT. A VERY DRY ATMOSPHERE EXISTS ATOP THE LOW LEVEL CLOUD COVER IN PLACE AND THUS.
MOISTURE TRAPPED UNDER A BROAD UPPER TROF WITH SEVERAL WEAK CUTOFF CIRCULATIONS LOLLYGAGGING OVER THE NORTHERN ROCKIES/NORTHER PLAINS THIS AFTERNOON.
848 PM CST TUE DEC 29 2015 Update to add fog and freezing fog to the forecast, and issue a Freezing Fog Advisory. The sky was clear over most of the area, except over portions of SE NM where freezing fog has developed around Artesia and into central and northern Lea county. Expect more fog to develop due to the clear skies, light wind and moist or snow covered ground with more freezing fog developing through late tonight generally along and north of Interstate 20. /issued 1231 PM CST TUE DEC 29 2015/ Series of upper troughs move over the area keeping cold weather in the forecast. An upper trough will swing over the area but not bring much with it.
SNOW WILL LARGELY END THIS EVENING ACROSS NEW MEXICO AS THE QUICK MOVING UPPER LEVEL TROUGH SHIFTS EASTWARD INTO THE GREAT PLAINS. THEN ANOTHER ROUND OF PATCHY FREEZING FOG IS POSSIBLE TONIGHT. THE UPPER LEVEL TROUGH BRINGING SNOW TO PORTIONS OF THE STATE THIS AFTERNOON WILL EXIT THIS EVENING. PATCHY FREEZING FOG MAY DEVELOP OVERNIGHT.
CHATTANOOGA AIRPORT, TN 50 57 45 54 / 30 70 30 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 49 58 43 50 / 10 70 30 10 OAK RIDGE, TN 48 57 43 50 / 10 70 20 10 TRI CITIES AIRPORT, TN 47 59 44 50 / 10 80 40 10.
AN UPPER LEVEL TROUGH EXISTS OVER MT CURRENTLY. THIS TROUGH WILL DRIFT EAST OVER THE NEXT COUPLE OF DAYS.
ANOTHER STORM SYSTEM WILL BRING A BRIEF PERIOD OF RAIN AND MOUNTAIN SNOW LATE THIS AFTERNOON THROUGH WEDNESDAY MORNING BEFORE HIGH PRESSURE RETURNS FOR THE REMAINDER OF THE WEEK.
A BLOCKED UPPER LEVEL LOW OVERHEAD AND MID LEVEL FRONTOGENETIC FORCING HAS FACILITATED A PROLONGED BAND OF SNOW FROM NEAR MANKATO TO THE FAR SOUTHERN TWIN CITIES METRO TO EAU CLAIRE TODAY. THE UPPER LEVEL LOW SHOULD SUPPLY JUST ENOUGH ENERGY TO WARRANT CHANCE POPS FOR LIGHT SNOW.
A WAVE OF LOW PRESSURE ACROSS THE WESTERN GULF OF MEXICO WILL MOVE NORTHEAST ALONG THE BOUNDARY OVERNIGHT AND WEDNESDAY. ACCOMPANYING THIS LOW WILL BE ANOTHER ROUND OF WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS.
WHILE DEEP SWLY FLOW IN ADVANCE OF THE TROF WAS PULLING PAC MOISTURE OVER THE REGION. THE COMBINATION OF ENERGY ALOFT AND THE FRONTAL BOUNDARY HELP FOCUS THE HIGHEST RAIN CHANCES ACRS OUR SERN ZONES/COASTAL WATERS TONIGHT INTO WED.
This cold airmass has settled over the region with afternoon temperatures today struggling to climb above the freezing mark for all but the West Plains area. The remainder of the week will be quiet weather wise with temperatures only warming into the 30s each afternoon and falling into the lower 20s and teens each night. The weekend still looks to see a warming trend with temperatures in the lower 40s for high and 20s for lows.
253 PM PST TUE DEC 29 2015 A WEAK LOW PRESSURE CENTER IS SLIDING INTO THE PACIFIC NORTHWEST TODAY.
A SECOND SURGE OF HIGH PRESSURE IS EXPECTED TO MOVE INTO THE AREA OVERNIGHT AIDING FURTHER IN THE LIFTING. PATCHY LIGHT DRIZZLE ALONG THE COASTAL REGION IS EXPECTED TO TRANSITION TO -DZ/-RA OVERNIGHT AS A SECOND SURGE OF HIGH PRESSURE MOVES INTO THE AREA.
PREVIOUS DISCUSSION FOLLOWS: THE LOWER END OF VFR CIGS ARE EXPECTED TO DROP INTO THE MVFR RANGE BY OR SHORTLY AFTER SUNSET AND THEN CONTINUE TO LOWER TO IFR BEFORE SUNRISE WEDNESDAY. A LOW PRESSURE TROUGH IS EXPECTED TO FORM ALONG OR JUST EAST OF PADRE ISLAND AND PERSIST FOR SEVERAL DAYS. LOW LEVEL CONVERGENCE INCREASES AND MOISTURE DEEPENS ALONG AND EITHER SIDE OF THE TROUGH. HAVE INCREASED THE POPS ACROSS ALL AREAS OF THE CWA WITH LIKELY POPS ACROSS THE LOWER VALLEY AND COASTAL REACHES WHERE THE BEST LIFT AND DEEPEST MOISTURE RESIDES. QPF VALUES MAY NOT BE VERY HIGH BUT UPWARDS OF A QUARTER OF INCH POSSIBLE IN THE LOWER VALLEY. AS THE LOW PRESSURE TROUGH STRENGTHENS SO DO THE NORTHEAST TO NORTH WINDS.
620 PM EST TUE DEC 29 2015 LOW PRESSURE WILL TRACK SOUTH OF THE REGION TONIGHT. HIGH PRESSURE WILL CROSS THE REGION WEDNESDAY.
848 PM CST TUE DEC 29 2015 Update to add fog and freezing fog to the forecast, and issue a Freezing Fog Advisory. The sky was clear over most of the area, except over portions of SE NM where freezing fog has developed around Artesia and into central and northern Lea county. Expect more fog to develop due to the clear skies, light wind and moist or snow covered ground, with perhaps more freezing fog through late tonight generally along and north of Interstate 20. Will send an update to include the mention of fog and freezing fog, but the rest of the forecast appears in line. /issued 1231 PM CST TUE DEC 29 2015/ Series of upper troughs move over the area keeping cold weather in the forecast. An upper trough will swing over the area but not bring much with it.
DEEP SOUTHWEST FLOW HAS RESUMED YET AGAIN BETWEEN THE UPPER HIGH CENTERED OFF THE SOUTHEAST COAST AND THE EXPANSIVE, DEEP TROUGH OVER THE ROCKIES, SO THE EQUATORIAL PACIFIC FETCH IS UNDERWAY YET AGAIN. IT WILL TAKE SOME TIME TO SATURATE THE LOWER LEVELS ENOUGH TO GET RAIN TONIGHT, BUT THAT IS EXACTLY WHAT SHORT-TERM MODELS ARE SHOWING. SOUTHEASTERN SECTIONS OF THE HUNTSVILLE CWFA ARE STILL ON TRACK FOR THE BEST RAIN CHANCES AND THE HIGHEST RAINFALL TOTALS TONIGHT AND TOMORROW, THOUGH OVERALL TOTALS SHOULD NOT BE VERY HEAVY (UP TO 1/2 INCH). FORTUNATELY, IT APPEARS THAT THE CONVECTIVE POTENTIAL WILL BE GREATEST FURTHER S-SE OF OUR FORECAST AREA WHERE LOW LEVEL CONVERGENCE ALONG THE WARM FRONT AND SFC WAVE EXISTS.
THE LOWER LEVELS REMAIN MOIST. BUT IF THE HIGH CLOUDS CLEAR.
WEATHER PATTERN OVER THE REGION SETUP FOR FOR COOLER CONDITIONS THAN WE HAVE SEEN IN RECENT WEEKS BUT MIXED IN WITH SOME PRECIP CHANCES. HIGHS FRI-SAT COULD BE A BIT COOLER THAN GUID DUE TO CLOUDS AND STRONGER LOW LEVEL CAA DUE TO INCREASING CONFLUENT FLOW OVER THE OHIO VALLEY. WITH COLDER AIR PUSHING IN ON THE HEELS OF BUILDING HIGH PRESSURE FOR THE WEEKEND. POTENTIAL LOOKS TO EXIST FOR SOME FREEZING TEMPS DURING THE MORNINGS. BUT DUE TO RECENT WARMTH MORE INTEREST ON FREEZING TEMPS MIGHT EXIST.
949 PM EST TUE DEC 29 2015 LOW PRESSURE OVER LAKE HURON WILL MOVE ACROSS SOUTHERN ONTARIO TONIGHT. A WEAK AREA OF HIGH PRESSURE WILL BE OVER THE LOWER OHIO VALLEY TONIGHT. LOW PRESSURE WILL SLOWLY SLIDE EASTWARD ACROSS SOUTHERN ONTARIO TONIGHT. THIS WILL ALLOW HIGH PRESSURE TO RIDGE INTO THE OHIO RIVER VALLEY. AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE REGION ON WEDNESDAY WHICH WILL HELP TO KEEP IT CLOUDY.
within long wave Rockies trough arcing rapidly southwest to northeast across northeast OK overnight. Rockies trough splits. while remaining energy cuts off over NV under northwest ridge.
INFLUENCES FROM THE RIDGING PATTERN LIKELY TO KEEP MOST PLACES DRY. ATLANTIC RIDGE EXTENDING ACROSS THE REGION WILL KEEP WINDS OUT OF THE SOUTH TO SOUTHEAST UP TO 10-15 KNOTS.
/issued 1231 PM CST TUE DEC 29 2015/ Series of upper troughs move over the area keeping cold weather in the forecast. An upper trough will swing over the area but not bring much with it.
554 PM CST TUE DEC 29 2015 Low pressure has moved over Michigan this afternoon. However, a surface trof is moving around the low and through the region today.
Temperatures should remain above freezing, so will keep as rain. High pressure will build in at the surface as a warm front gets pinned up against the Appalachian Mtns. After this system expect cooler slightly below normal temperatures along with dry conditions.
1027 PM EST TUE DEC 29 2015 LOW PRESSURE WILL TRACK SOUTH OF THE REGION TONIGHT. HIGH PRESSURE WILL CROSS THE REGION WEDNESDAY.
High pressure will build in at the surface as a warm front gets pinned up against the Appalachian Mtns. After this system expect cooler slightly below normal temperatures along with dry conditions.
631 PM EST TUE DEC 29 2015 LOW PRESSURE OVER LAKE HURON WILL MOVE ACROSS SOUTHERN ONTARIO TONIGHT. A WEAK AREA OF HIGH PRESSURE WILL BE OVER THE LOWER OHIO VALLEY TONIGHT. LOW PRESSURE WILL SLOWLY SLIDE EASTWARD ACROSS SOUTHERN ONTARIO TONIGHT. THIS WILL ALLOW HIGH PRESSURE TO RIDGE INTO THE OHIO RIVER VALLEY. AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE REGION ON WEDNESDAY WHICH WILL HELP TO KEEP IT CLOUDY.
910 PM EST TUE DEC 29 2015 LOW PRESSURE OVER LAKE HURON WILL MOVE ACROSS SOUTHERN ONTARIO TONIGHT. A WEAK AREA OF HIGH PRESSURE WILL BE OVER THE LOWER OHIO VALLEY TONIGHT. LOW PRESSURE WILL SLOWLY SLIDE EASTWARD ACROSS SOUTHERN ONTARIO TONIGHT. THIS WILL ALLOW HIGH PRESSURE TO RIDGE INTO THE OHIO RIVER VALLEY. AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE REGION ON WEDNESDAY WHICH WILL HELP TO KEEP IT CLOUDY.
EXCEPT BECOMING SOUTHERLY MAINLY OVER THE NORTHWEST FLORIDA PANHANDLE AND PART OF SOUTH CENTRAL ALABAMA AS A WARM FRONT LIFTS NORTHWARD INTO THE AREA. UPPER LEVEL ANALYSIS SHOWS STRONG UPPER LEVEL RIDGE CENTERED OVER THE WESTERN ATLANTIC EXTENDING WESTWARD INTO EAST COAST AND EAST COAST AND GULF OF MEXICO THIS AFTERNOON. OUT WEST AN UPPER TROUGH IS PIVOT ACROSS THE DESERT SOUTHWEST AND HEADED NORTHEAST. A RESIDUAL FRONTAL BOUNDARY/INVERTED TROUGH HAS STALLED ACROSS THE GULF OF MEXICO FROM NEAR PANAMA CITY TO THE BAY OF CAMPECHE. THE UPPER TROUGH WILL RACE NORTHEASTWARD ACROSS THE CENTRAL PLAINS OVERNIGHT WHICH WILL DRAW THE FRONTAL BOUNDARY NORTHWESTWARD TOWARDS THE NORTHERN GULF COAST. UPPER RIDGE WILL BE ANCHORED OVER THE WESTERN ATLANTIC AND GENERAL TROUGHING PERSISTS OVER THE WESTERN HALF OF THE COUNTRY.
950 PM CST TUE DEC 29 2015 AN UPPER TROUGH WAS MOVING NORTHEAST ACROSS THE PANHANDLE AND SOUTH PLAINS THIS EVENING. SOME BRIEF LIGHT SNOW WAS ACCOMPANYING THE TROUGH. DRY AND SUBSIDENT AIR WILL MOVE ACROSS NORTH TEXAS OVERNIGHT BUT SOME MOISTURE IN THE LOW LEVELS SHOULD KEEP AT LEAST PARTLY CLOUDY SKIES THROUGH THE NIGHT. 79 /ISSUED 549 PM CST TUE DEC 29 2015/ /00Z TAFS/ WATER VAPOR IMAGERY SHOWS AN UPPER TROUGH MOVING THROUGH THE SOUTHERN PLAINS THIS EVENING.
553 PM CST TUE DEC 29 2015 A fairly deep trough over the Southern Rockies will kick out into the Plains tonight, weakening steadily as it does so. Upper pattern behind Wednesday morning's system will stay fairly steady for much of the remainder of the week, with high-amplitude ridging over the West Coast and flat troughing downstream across the eastern two thirds of the U.
THIS FEATURE WILL LIFT A WARM FRONT/INVERTED TROUGH BACK TO THE NORTH AND INTO CENTRAL ALABAMA BY MORNING. THIS FEATURE MEANDERS AROUND THE SOUTHEAST HALF OF THE AREA UNTIL HIGH PRESSURE FINALLY BUILDS BY THE WEEKEND. THE TREND OF THE HIGHEST RAIN AMOUNTS SOUTH AND SOUTHEAST REMAINS AND WILL STILL BE IN THE 1 TO 3 INCH RANGE.
WITH WEAK HIGH PRESSURE OVER THE NORTHERN ROCKIES. TODAY THROUGH MONDAY NIGHT UPPER LOW ACROSS THE GREAT BASIN WILL CONTINUE TO BREAK DOWN AS STRONG UPPER RIDGING DEVELOPS ACROSS THE PACIFIC NW. UPPER RIDGE AXIS WILL CROSS THE NRN ROCKIES MONDAY WITH SUBSIDENCE CONTINUING ACROSS THE REGION.
1155 AM EDT SUN JUN 7 2015 HIGH PRESSURE WILL KEEP DRY WEATHER ACROSS THE REGION TODAY. SOME CLOUDS FORMING OVER SOUTHWEST PA AND OVER THE MOUNTAIN RIDGES OVER PA/WV/MD. THERE COULD BE ENOUGH INSTABILITY TO ALLOW FOR AN ISOLATED SHOWER OR STORM ACROSS THE RIDGES.
LOW PRESSURE WAS OVER NORTHEASTERN MINNESOTA WHILE HIGH PRESSURE COVERED THE FRONT RANGE.
TODAY THROUGH MONDAY NIGHT UPPER LOW ACROSS THE GREAT BASIN WILL CONTINUE TO BREAK DOWN AS STRONG UPPER RIDGING DEVELOPS ACROSS THE PACIFIC NW. UPPER RIDGE AXIS WILL CROSS THE NRN ROCKIES MONDAY WITH SUBSIDENCE CONTINUING ACROSS THE REGION.
901 AM MDT SUN JUN 7 2015 STRONG PAC NW RIDGE WILL DOMINATE OUR WEATHER TODAY WITH MOSTLY DRY CONDITIONS AND TEMPS CLIMBING INTO THE 80S. A STRONG UPPER RIDGE ANCHORED OVER THE PAC NW WILL BEGIN TO AFFECT OUR WEATHER THE NEXT COUPLE OF DAY AS UPPER LOW OVER THE SOUTHWESTERN CONUS STAYS WELL TO OUR SOUTH. THE WRF DOES SHOW SOME VERY WEAK ENERGY ACROSS THIS REGION IN THE AFTERNOON BEFORE THE RIDGE STRENGTHENS. I DO NOT WANT TO ADVERTISE THUNDERSTORMS OR EVEN DECENT SHOWERS TODAY WITH RIDGE BUILDING IN AND SUCH WEAK TRIGGERS AVAILABLE. OTHERWISE THE LOW POPS OVER THE SOUTHERN HIGHER TERRAIN LOOKS GOOD.
WE WILL ONCE AGAIN FEEL THE EFFECTS OF THE SUBSIDENCE FROM THE UPPER LEVEL RIDGE THAT HAS BEEN IN THE SOUTHERN PLAINS THE PAST FEW DAYS. DUE TO THE TROUGH IN THE NORTHERN PLAINS. IT IS NOT AS AMPLIFIED AND THE AXIS IS ACROSS THE LOWER MS VALLEY AND SE. TEMPS ARE CURRENTLY IN THE LOW TO MID 80S ALREADY THIS MORNING ACROSS THE TN VALLEY. THE RIDGE INFLUENCE. TEMPS WILL BE THE WARMEST TODAY IN THE LOW TO MID 90S.
846 AM EDT SUN JUN 7 2015 HIGH PRESSURE WILL KEEP DRY WEATHER ACROSS THE REGION TODAY. HIGH PRESSURE ACROSS THE NORTHEAST CONUS WILL KEEP DRY WEATHER TODAY. THERE COULD BE ENOUGH INSTABILITY TO ALLOW FOR AN ISOLATED SHOWER OR STORM ACROSS THE MD/WV RIDGES.
WEAK UPPER RIDGING CONTINUES TO FLATTEN THROUGH THE PERIOD AS A SERIES OF SHORT WAVES SWEEP ACROSS THE OHIO VALLEY. ASSOCIATED COLD FRONT PUSHES INTO THE NORTHERN PORTION OF THE FORECAST AREA BY LATE IN THE DAY MONDAY AS WELL. PRECIPITATION CHANCES INCREASING ACCORDINGLY WITH CHANCE POPS IN NORTHEAST AND EAST CENTRAL GEORGIA TODAY WHERE UPSLOPE FLOW ACROSS THE HIGHER TERRAIN AND SOME SEA BREEZE INTERACTION SHOULD HELP TO ENHANCE ACTIVITY A BIT. CHANCE POPS EVERYWHERE MONDAY AS THE RIDGE BREAKS DOWN FURTHER AND SHORT WAVE/ COLD FRONT HELP TO ENHANCE LIFT. BUT THEN SHOW HIGH PRESSURE AND DRIER CONDITIONS SETTLING IN OVER THE WEEKEND.