Aikyam-Lab/Synoptic-Bench huggingface dataset:
SURFACE TEMPERATURES ARE AT OR JUST ABOVE FREEZING AT THIS TIME. THE NEXT CONCERN IS DRIZZLE OR FREEZING DRIZZLE. THAT TEMPERATURE DIFFERENCE IS CRITICAL SINCE IT IS RIGHT AROUND FREEZING. HAVE KEPT DRIZZLE OR FREEZING DRIZZLE FOR THE MORNING HOURS. EXPECT THE FREEZING DRIZZLE TO BE RELATIVELY SHORT LIVED THIS MORNING. TEMPERATURES SHOULD RISE AFTER THE SUN COMES UP TODAY AND IT WILL ONLY BE A MATTER OF TIME BEFORE THE TEMPERATURES WARM ENOUGH THAT FREEZING WILL NOT OCCUR. THE TEMPERATURES SHOULD WARM INTO THE 30S AND EVEN THE LOWER 40S IN THE SOUTHWEST. AS A BROAD UPPER LEVEL TROUGH DEEPENS AND EXPANDS OVER THE WESTERN AND CENTRAL UNITED STATES.
Snow amounts will be light, but will be enough to slicken up the roads, especially at higher elevations which have warmed recently but will quickly refreeze once the cold front from the east arrives in northwest Montana.
AS AN AMPLIFYING UPPER TROUGH PATTERN APPROACHES THE MID/SRN PLAINS. WITH AFTERNOON HIGHS PERHAPS A FEW DEGREES WARMER THAN TUE OR MORE IN THE MID/UPPER 40S RANGE FOR MOST LOCATIONS. WITH OVERNIGHT TEMPS TRENDING SLIGHTLY WARMER COMPARED TO THE PAST FEW MORNINGS OR LOWS CLOSER TO THE 32F MARK. AS A COUPLE OF LOW PRESSURE SYSTEMS DEVELOP FROM THE MID PLAINS INTO THE CNTRL GULF. IN RESPONSE TO THE UPPER TROUGH PATTERN SWINGING EWD THROUGH THE PLAINS STATES. NOTICEABLY COOLER AND DRIER AIR WILL THEN RETURN TO THE CNTRL TN VALLEY AREA AS THE NEW WORK WEEK BEGINS. AS ANOTHER LARGE DOME OF HIGH PRESSURE DIVES SEWD ACROSS THE PLAINS STATES.
934 AM EST WED JAN 6 2016 HIGH PRESSURE CONTINUES. /ISSUED / THE SHORT TERM PERIOD BEGINS WITH STRONG HIGH PRESSURE ANCHORED OVER THE MID ATLANTIC STATES PROVIDING AN EASTERLY FLOW REGIME TO THE LOCAL AREA. DO EXPECT SOME MARGINAL TEMP RECOVERY INTO THE OVERNIGHT HOURS WITH LOWS IN THE LOWER 30S AS OPPOSED TO THE 20S SEEN THE LAST COUPLE OF NIGHTS.
(TODAY-FRI NIGHT) THE MID STATE SHOULD REMAIN DRY THRU THU MORNING AS APEX OF RIDGING INFLUENCES SFC/ALOFT WILL BE SHIFTING EWD. AS THIS QUASI-STACKED SFC/UPPER LEVEL LOW PRESSURE SYSTEM MOVES NEWD INTO S CNTRL IA BY 12Z FRI. WITH A TRAILING COLD FRONT SWD INTO AT LEAST SRN MO. AND WITH A WARM FRONT BEING PUSHED INTO SRN ONTARIO/SRN QUEBEC. ASSOCIATED UPPER LEVEL LOW MENTIONED ABOVE IN DEPICTED BY CONSENSUS OF MODEL RUNS TO WASH OUT/BE PICKED UP BY A MUCH BROADER UPPER LEVEL LOW PRESSURE CIRCULATION CENTERED ACROSS CNTRL MANITOBA. BROAD UPPER LEVEL TROUGHING WILL CONTINUE ACROSS MUCH OF THE CNTRL U. FRI INTO FRI NIGHT PER REINFORCING UPPER LEVEL LOW PRESSURE SYSTEM AND ASSOCIATED TROUGHING INFLUENCES CONTINUING TO MOVE INTO THE WRN U.
UPPER LEVEL RIDGING WILL BUILD ACROSS THE AREA TODAY. TEMPERATURES WILL FALL TO FREEZING IN THE WESTERN OKLAHOMA PANHANDLE SO HAVE A CHANGEOVER TO RAIN/SNOW MIX OR POSSIBLE FREEZING DRIZZLE THERE. SOME QUESTION AS TO HOW LONG PRECIP WILL LINGER ACROSS THE OKLAHOMA PANHANDLE INTO THURSDAY AS THE UPPER LEVEL LOW PASSES OVERHEAD.
This precipitation is expected to mostly be in the form of light rain across the area except across southeast New Mexico where temperatures are around freezing so a wintry mix is possible. Patchy freezing fog is possible this morning across southeast New Mexico where Artesia is currently experiencing freezing fog. Precipitation is expected across the area into this afternoon but will be in the form of rain as temperatures warm up into the mid 40s to the lower 60s.
HIGH PRESSURE RIDGING WILL CONTINUE TO PREVAIL ACROSS THE AREA TODAY WITH SLIGHTLY WARMER AFTERNOON TEMPERATURES THAN YESTERDAY. A VERY STRONG UPPER JET WILL DRIVE A SHORT WAVE TROUGH INTO OUR DOORSTEP BY THURSDAY MORNING WITH SHOWERS MOVING INTO OUR WESTERN PARISHES EARLY AND SPREADING EAST ACROSS THE AREA WITH THE SHORT WAVE THROUGH THE DAY.
SHASTA CITY, WE'VE HAD A SLOPPY MESS OF RAIN, SNOW, AND EVEN POCKETS OF FREEZING RAIN THIS MORNING. IN THE MEAN TIME, IT'S STILL PLENTY TREACHEROUS IN THE AREA WITH ALL THE WATER, SLUSH, AND FREEZING RAIN. MODELS SHOW MOST AREAS GETTING A LITTLE LIGHT PRECIPITATION AS THE UPPER TROUGH SWINGS IN THROUGH THE DAY, BUT MODELS SHOW A PRONOUNCED DONUT HOLE IN THE RAIN OVER THE ROGUE VALLEY CONTINUING MUCH OF THE DAY. ALL OF THIS WILL WIND DOWN LATER TODAY AND TONIGHT, BUT PRECIPITATION WILL REMAIN POSSIBLE THROUGH THURSDAY, ESPECIALLY ON THE WEST SIDE, AS THE REST OF THE UPPER TROUGH SWINGS THROUGH.
A WARM FRONT APPROACHING FROM THE SOUTHWEST WILL MOVE INTO THE FORECAST AREA THURSDAY NIGHT.
However, conditions will again begin to deteriorate this evening ahead of an approaching cold front.
1042 AM EST WED JAN 6 2016 A LOW LEVEL HIGH PRESSURE RIDGE CENTERED OVER THE CENTRAL APPALACHIANS WILL CONTINUE TO SUPPLY A CHILLY AND DRY AIR MASS TO THE AREA TODAY.
UPPER AND SURFACE RIDGING WILL CONTINUE TO PRODUCE VFR FLIGHT CONDITIONS AND LIGHT/CALM WINDS AT ALL TAF SITES THROUGH THE FORECAST.
/ISSUED / THE SHORT TERM PERIOD BEGINS WITH STRONG HIGH PRESSURE ANCHORED OVER THE MID ATLANTIC STATES PROVIDING AN EASTERLY FLOW REGIME TO THE LOCAL AREA. DO EXPECT SOME MARGINAL TEMP RECOVERY INTO THE OVERNIGHT HOURS WITH LOWS IN THE LOWER 30S AS OPPOSED TO THE 20S SEEN THE LAST COUPLE OF NIGHTS.
629 AM EST WED JAN 6 2016 HIGH PRESSURE OVERHEAD WILL SLIDE ONLY SLOWLY TO THE EAST OVER THE NEXT COUPLE OF DAYS. A WARM FRONT WILL BRING LIGHT PRECIPITATION LATE THIS WEEK. HIGH PRESSURE FIRMLY IN CONTROL.
HIGH PRESSURE TO THE NORTHEAST HAD THE WINDS FROM THE EAST ACROSS OUR CWA. THE UPPER LEVEL FLOW WILL BECOME SOUTHWESTERLY ACROSS THE SOUTHERN PLAINS TODAY AND TONIGHT AS A TROUGH MOVES THROUGH THE SOUTHWEST. THURSDAY THE UPPER TROUGH WILL MOVE ACROSS TEXAS AND THE FLOW WILL BECOME ZONAL ON THE BACKSIDE. HIGH TEMPERATURES WILL ALSO BE MUCH WARMER.
SETTING UP FROM WHEATON THROUGH ABERDEEN THEN OVER TO THE MOBRIDGE AND PIERRE REGION.
615 AM MST WED JAN 6 2016 A SHORT WAVE RIDGE WILL BE OVER THE AREA TODAY AS THE REGION WILL BE BETWEEN SYSTEMS.
HIGHS ARRIVING WITHIN A COUPLE DEGREES OF THE FREEZING MARK. CAPPED IN THE LOWER AND MIDDLE 20S RANGE.
SURFACE TEMPERATURES ARE AT OR JUST ABOVE FREEZING AT THIS TIME. THE NEXT CONCERN IS DRIZZLE OR FREEZING DRIZZLE. THAT TEMPERATURE DIFFERENCE IS CRITICAL SINCE IT IS RIGHT AROUND FREEZING. HAVE KEPT DRIZZLE OR FREEZING DRIZZLE FOR THE MORNING HOURS. EXPECT THE FREEZING DRIZZLE TO BE RELATIVELY SHORT LIVED THIS MORNING. TEMPERATURES SHOULD RISE AFTER THE SUN COMES UP TODAY AND IT WILL ONLY BE A MATTER OF TIME BEFORE THE TEMPERATURES WARM ENOUGH THAT FREEZING WILL NOT OCCUR. THE TEMPERATURES SHOULD WARM INTO THE 30S AND EVEN THE LOWER 40S IN THE SOUTHWEST. A VARIETY OF WINTRY PRECIPITATION IS POSSIBLE BUT THE MOST LIKELY WILL BE SOME LIGHT FREEZING DRIZZLE.
1034 AM EST WED JAN 6 2016 EXPANSIVE HIGH PRESSURE OVER THE MID ATLANTIC REGION WILL SLIDE SLOWLY TO THE EAST OVER THE NEXT COUPLE OF DAYS. A WARM FRONT WILL BRING LIGHT PRECIPITATION LATE THIS WEEK. TEMPS WERE CLIMBING IN THE LOW-MID 20S AND ON PACE TO REACH MID AFTERNOON HIGHS IN THE MID TO UPPER 30S. BUT UP TO SEVERAL DEG F ABOVE NORMAL ACROSS THE HIGHER TERRAIN OF THE NORTH AND WEST. VERY SLIGHT HEIGHT FALLS SO HIGH CLOUDS COULD INCREASE BUT THE HIGH CONTINUES TO DEFLECT THE THICKEST OF THEM TO THE N.
447 AM MST WED JAN 6 2016 12Z TAF CYCLE UPPER LEVEL TROUGH/LOW APPROACHING FROM AZ WILL RESULT IN AREAS TO WDSPRD -RA/-RASN/-SN ACROSS WRN AND CENTRAL NM TODAY. SNOW AMOUNTS THROUGH TONIGHT MAY EXCEED ONE FOOT OVER SOME OF THE HIGHER PEAKS IN THE SOUTH CENTRAL MOUNTAINS.
THE STORMS ASSOCIATED COLD FRONT IS JUST OFFSHORE AND MOVING INTO CENTRAL CALIFORNIA BY MID-DAY. WILL FOLLOW WEATHER PREDICTION CENTER GUIDANCE AND EXPECT HEAVY MOUNTAIN PRECIP WITH LIGHT TO MODERATE AMOUNTS OVER THE LOWER ELEVATIONS.
FREEZING RAIN OVER LOWER COLUMBIA BASIN HAS MOVED NORTH. UPDATED FORECAST TO REMOVE FREEZING RAIN.
358 AM MST WED JAN 6 2016 A SHORT WAVE RIDGE WILL BE OVER THE AREA TODAY AS THE REGION WILL BE BETWEEN SYSTEMS.
AND SURFACE TEMPS IN EASTERN NEB/WESTERN IA AT 08Z WERE IN THE LOWER 30S.
THERE HAVE ALSO BEEN SOME SPOTTY REPORTS OF FREEZING DRIZZLE AND FLURRIES. TEMPERATURES RANGED FROM THE LOWER 20S IN THE NORTH TO THE MIDDLE TO UPPER 20S IN THE SOUTH. CLOUDS AND FREEZING DRIZZLE/FLURRIES WILL PREVAIL ACROSS THE AREA THIS MORNING. BUT NOT EXPECTING WIDESPREAD ISSUES DUE TO FREEZING DRIZZLE AS IT SHOULD GENERALLY BE AN ISSUE FOR THE MORNING.
EASTERN SITES SHOULD LOWER CIGS AGAIN TONIGHT AHEAD OF APPROACHING COLD FRONT. A COASTAL TROUGH IS KEEPING SOME STRONGER SHOWERS IN MARINE AREAS THIS MORNING. SURFACE COLD FRONT WILL MOVE THROUGH LATE IN THE NIGHT OR EARLY THURSDAY MORNING WITH DRIER AIR BEING THE NAME IMPACT FROM THE FRONT. WILL NOT SEE COOLER TEMPERATURES WITH THIS FRONT. IN FACT EXPECT WARMER TEMPERATURES THURSDAY THAN WEDNESDAY DUE TO THE DRIER AIR AND CLEAR SKIES.
A BRIEF PERIOD OF SHORT WAVE RIDGING DEVELOPS OVER THE REGION AHEAD OF A BROAD TROF MOVING ON TO THE WEST COAST. STILL LOOKS LIKE A SHALLOW COLD FRONT SLIPPING INTO OUR AREA FROM THE NORTH TONIGHT. MASSIVE UPPER LOW MOVES INTO THE CENTRAL ROCKIES INITIATING BROAD SCALE HEIGHT FALLS. THIS WILL GENERATE MID LEVEL LIFT AND ALLOW REINFORCEMENT OF THE COLD AIR AT THE LOWER LEVELS. THESE SHOWERS WILL END BY LATE FRI BUT WILL BE FOLLOWED QUICKLY BY THE SECONDARY DISTURBANCE ROUNDING THE BASE OF THE POSITIVELY TITLED CANADIAN TROUGH.
WITH LOW CLOUDS INCREASING AHEAD OF A WARM FRONT APPROACHING FROM THE SOUTHWEST. AS A WARM FRONT LIFTS NORTHWARD FROM TEXAS AND WINDS GAIN MORE OF A SOUTHEAST/ SOUTHERLY COMPONENT.
HIGH PRESSURE WILL DOMINATE THE WEATHER OF EASTERN KENTUCKY IN THE SHORT TERM. WITH THE SURROUNDING RIDGES DROPPING INTO THE MID TO UPPER 20S. TODAYS HIGHS WILL BE WARMER THAN YESTERDAY. WITH HIGHS ON THURSDAY EXPECTED TO TOP OUT IN THE LOWER 50S. AS AN AREA OF LOW PRESSURE APPROACHES FROM THE WEST.
553 AM EST WED JAN 6 2016 HIGH PRESSURE OVERHEAD WILL SLIDE ONLY SLOWLY TO THE EAST OVER THE NEXT COUPLE OF DAYS. A WARM FRONT WILL BRING LIGHT PRECIPITATION LATE THIS WEEK. HIGH PRESSURE FIRMLY IN CONTROL.
A COLD FRONT WILL PRODUCE SHOWERS THIS MORNING BEFORE QUICKLY EXITING.
605 AM EST WED JAN 6 2016 HIGH PRESSURE WILL REMAIN IN PLACE IN THE MID-ATLANTIC REGION FOR THE NEXT FEW DAYS.
626 AM EST WED JAN 6 2016 HIGH PRESSURE WILL DOMINATE THE WEATHER OF EASTERN KENTUCKY IN THE SHORT TERM. WITH THE SURROUNDING RIDGES DROPPING INTO THE MID TO UPPER 20S. TODAYS HIGHS WILL BE WARMER THAN YESTERDAY. WITH HIGHS ON THURSDAY EXPECTED TO TOP OUT IN THE LOWER 50S. AS AN AREA OF LOW PRESSURE APPROACHES FROM THE WEST.
THERE IS A WANING TENDENCY OVER THE LOWER KEYS AND POINTS WESTWARD ACCORDING TO KBYX DOPPLER RADAR THIS MORNING. AND THE SHARP TROUGH AXIS POISED TO SWING THROUGH IN THE VERY NEAR TERM. SO WILL LEAVE THE HIGHER CHANCE OF PRECIPITATION AS ADVERTISED FROM THE EARLY MORNING ZONE FORECAST.
522 AM EST WED JAN 6 2016 HIGH PRESSURE OVERHEAD WILL SLIDE ONLY SLOWLY TO THE EAST OVER THE NEXT COUPLE OF DAYS. A WARM FRONT WILL BRING LIGHT PRECIPITATION LATE THIS WEEK. HIGH PRESSURE FIRMLY IN CONTROL.
ROAD TEMPS BELOW FREEZING WERE OBSERVED NEAR ONTARIO AND SLIGHTLY ABOVE 32 FROM NAMPA THROUGH BOISE TO ELMORE CO. PRECIP IS FILLING IN ALONG A CAMBRIDGE-KUNA AXIS AND WILL SLOWLY FILL IN ACROSS SW IDAHO. UPPER LOW OFFSHORE WILL MOVE TO OVER NV THURSDAY WITH LOWERING SNOW LEVELS AND LIGHT QPF ACROSS THE REGION. POCKETS OF FREEZING RAIN ARE POSSIBLE THROUGH THE SHORT TERM.
A SERIES OF OFFSHORE LOW PRESSURE SYSTEMS AND FRONTAL BOUNDARIES WILL PRODUCE PERIODS OF RAIN.
1008 AM EST WED JAN 6 2016 HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE REGION THROUGH THURSDAY.
AN UPPER LOW OFFSHORE WILL BRING A LITTLE RAIN TO AREAS WEST OF PUGET SOUND THIS MORNING. DRIER WEATHER IS IN STORE FOR THE REMAINDER OF THE WEEK AS AN UPPER RIDGE MOVES IN. THE LOW LEVELS WILL DRY AS THIS SYSTEM MOVES NORTH OUT OF THE AREA AND MOST AREAS SHOULD BECOME PARTLY SUNNY BY AFTERNOON. AN UPPER LOW OFFSHORE OREGON WILL GRADUALLY SHIFT SOUTHEAST INTO CALIFORNIA TONIGHT AND THURSDAY.
635 AM EST WED JAN 6 2016 HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE REGION THROUGH THURSDAY.
THE CONSENSUS AMONG THE HIGH RESOLUTION MODELS HAS LIGHT PRECIPITATION SPREADING INTO THE FAR WESTERN COUNTIES IN THE MID TO LATE AFTERNOON. AM NOT EXPECTING ANY SIGNIFICANT FREEZING RAIN THROUGH TONIGHT. AS ANY SIGNIFICANT WARM LAYER IN THE SOUTH COINCIDES WITH ABOVE FREEZING SURFACE TEMPS. WILL BE THE POTENTIAL FOR PERIODS OF FREEZING DRIZZLE ACROSS THE NORTH TONIGHT AS SOUNDINGS SUGGEST OCCASIONAL LOSS OF ICE INTRODUCTION ALOFT. BOTTOM LINE FOR TONIGHT IS LIGHT SNOW ACCUMULATIONS AROUND A HALF INCH OR LESS EXPECTED ALONG THE HIGHWAY 20 CORRIDOR WITH POTENTIAL FOR SOME PROBLEMATIC FREEZING DRIZZLE AT TIMES NORTH.
946 AM EST WED JAN 6 2016 HIGH PRESSURE WILL REMAIN TO OUR SOUTH THROUGH THURSDAY.
413 AM CST WED JAN 6 2016 (TODAY-FRI NIGHT) THE MID STATE SHOULD REMAIN DRY THRU THU MORNING AS APEX OF RIDGING INFLUENCES SFC/ALOFT WILL BE SHIFTING EWD. AS THIS QUASI-STACKED SFC/UPPER LEVEL LOW PRESSURE SYSTEM MOVES NEWD INTO S CNTRL IA BY 12Z FRI. WITH A TRAILING COLD FRONT SWD INTO AT LEAST SRN MO. AND WITH A WARM FRONT BEING PUSHED INTO SRN ONTARIO/SRN QUEBEC. ASSOCIATED UPPER LEVEL LOW MENTIONED ABOVE IN DEPICTED BY CONSENSUS OF MODEL RUNS TO WASH OUT/BE PICKED UP BY A MUCH BROADER UPPER LEVEL LOW PRESSURE CIRCULATION CENTERED ACROSS CNTRL MANITOBA. BROAD UPPER LEVEL TROUGHING WILL CONTINUE ACROSS MUCH OF THE CNTRL U. FRI INTO FRI NIGHT PER REINFORCING UPPER LEVEL LOW PRESSURE SYSTEM AND ASSOCIATED TROUGHING INFLUENCES CONTINUING TO MOVE INTO THE WRN U.
SEVERAL SHORT WAVE TROUGHS WILL RIDE UNDER THE DEVELOPING PLAINS LONG WAVE TROUGH.
Band of light mixed precipitation stretched from north central Oklahoma into eastern Kansas just head of the trough axis within a region of isentropic upglide where a mix of light snow, sleet and freezing rain had been reported. Patchy light precipitation could spread as far east as the Highway 65 corridor this morning. However with slowly rising temperatures above freezing and the intrusion of the warm nose above the boundary layer precipitation will transition to patchy light rain or sprinkles by mid morning.
HI PRES CNTRD ACRS THE MID ATLANTIC RIDGES SW ACRS LA. ANOTHER CHILLY NIGHT UNDERWAY WITH MOSTLY CLR SKIES AGAIN ALLOWING FOR DECENT RADIATIONAL CONDITIONS WITH TEMPERATURES NEAR FREEZING ACRS CNTL LA TO UPPER 30S/NR 40 ACRS SW LA/SE TX. A SFC TROF WILL DEVELOP BETWEEN THIS LOW AND THE UPPER TX COAST TONIGHT. RAINFALL TOTALS LOOK TO REMAIN ON THE LOW SIDE. SLY WINDS WILL BECOME SWLY THURS AS THE SFC TROF LIFTS NE ACRS THE AREA AS A WARM FRONT. WITH HIGHS ON FRI INTO THE LOWER 70S. AND THIS LOW WILL LIFT NE AS THE NEXT DISTURBANCE EJECTS OVER THE PLAINS. WITH A COLD FRONT EXPECTED TO MOVE THROUGH THE AREA EARLY SAT.
955 AM EST WED JAN 6 2016 INTERACTION BTWN A HI PRES RIDGE BUILDING OFF THE MID ATLC COAST AND A DVLPG AREA OF LOW PRES BTWN CUBA AND THE BAHAMAS HAS RESULTED IN AN 8MB PGRAD ACRS THE FL PENINSULA. THE LOW CENTER WILL LIFT QUICKLY NEWRD ACRS THE BAHAMAS THRU SUNSET. CHC-LKLY COVERAGE WITH THE HIGHEST PCPN/QPF ALONG THE SPACE AND TREASURE CST AND INLAND TO OSCEOLA CO AND LAKE OKEECHOBEE. TIGHT PGRAD ACRS THE REGION DUE TO INTERACTION BTWN A HI PRES RIDGE BUILDING OFF THE MID ATLC COAST AND A DVLPG LOW PRES SYSTEM BTWN CUBA AND THE BAHAMAS.
604 AM EST WED JAN 6 2016 HIGH PRESSURE WILL REMAIN TO OUR SOUTH THROUGH THURSDAY.
THEN PULL IT BACK SOUTH AND ABSORB IT INTO THE LOW MOVING ACROSS UTAH TOMORROW NIGHT. ALMOST STALLING OVER EASTERN IDAHO BEFORE BEING ABSORBED INTO THE LOW. THE INTERSTATE CORRIDOR AND WARMER SOUTHERN VALLEYS WILL SEE LIMITED SNOW AND MORE LIGHT RAIN THAN ANYTHING.
616 AM CST WED JAN 6 2016 Models show low pressure over the central Rockies moving very slowly east then northeast through the end of the work week.
624 AM CST WED JAN 6 2016 QUICK UPDATE TO ADD A MENTION OF PATCHY FREEZING DRIZZLE ACROSS SOUTH CENTRAL NORTH DAKOTA AND THE JAMES RIVER VALLEY BASED UPON NDDOT WEBCAM AND ROAD REPORT TRENDS THROUGH 1215 UTC RESULTING FROM A DRY LAYER ABOVE THE LOW LEVEL STRATUS. THE MAIN ISSUES IN THE SHORT TERM ARE FOG, LOW CLOUDS, AND CHANCES FOR LIGHT SNOW AND FREEZING RAIN. THICK CLOUD COVER WILL LIMIT DAYTIME HEATING THUS KEEPING TEMPERATURES GENERALLY IN THE LOW 20S. AT THIS TIME IT APPEARS THE JAMES VALLEY STANDS THE BEST CHANCE AT SEEING SOME LIGHT PRECIPITATION TONIGHT AS AN INVERTED TROUGH NOSES INTO THE EASTERN DAKOTAS. THIS COULD PRODUCE SOME LIGHT FREEZING DRIZZLE TONIGHT INTO TOMORROW.
A TROUGH OF LOW PRESSURE OVER SRN CALIFORNIA. A CLOSED LOW WAS NOTED OFF THE COAST THE PAC NW STATES. THE THREAT FOR LIGHT FREEZING DRIZZLE THROUGH MID MORNING WILL CONTINUE. LENDS SOME SUPPORT TO A MENTION OF DRIZZLE/FREEZING DRIZZLE OVERNIGHT AS THERE IS SOME WEAK LIFT IN THIS NEAR SURFACE SATURATED LAYER.
We will see a trend toward warmer temperatures as highs today reach into the low and mid 40s.
TEMPERATURES RANGE FROM THE LOWER 30S OVER NORTHWEST MISSISSIPPI TO THE LOWER 20S NEAR THE TENNESSEE RIVER BASIN. LATEST SURFACE ANALYSIS PLACES A DEPARTING AREA OF HIGH PRESSURE OVER THE EAST COAST. WITH A LOW PRESSURE SYSTEM JUST WEST OF THE FOUR CORNERS.
THE TROUGH AXIS HAS TAKEN ON A NEGATIVE TILT. WHILE AN EXPANSIVE CONTINENTAL HIGH PRESSURE CELL WAS CENTERED OVER THE MID-ATLANTIC STATES. THE GRADIENT FLOW BETWEEN THE HIGH CELL AND DEVELOPING LOW- LATITUDE FRONTAL WAVE CYCLONE IS SUPPORTING A STEADY 25-30-KNOT NEAR-SURFACE FLOW ACROSS FLORIDA KEYS COASTAL WATERS. FORECASTS -- THE BAHAMIAN FRONTAL WAVE WILL INTENSIFY INTO A CYCLONE/GALE CENTER LATER TODAY OR TONIGHT AS IT ACCELERATES NORTHEASTWARD. AND ISALLOBARIC FORCING PATTERN OF THE DEVELOPING CYCLONE.
1010 AM EST WED JAN 6 2016 HIGH PRESSURE WILL REMAIN IN PLACE IN THE MID-ATLANTIC REGION FOR THE NEXT FEW DAYS.
In addition, road temperatures have responded, warming several degrees from the time precipitation began into the lower 30s.
CLOUD COVER WILL INCREASE FROM SOUTHWEST TO NORTHEAST TODAY AND TONIGHT AS AN UPPER TROUGH SHIFTS ACROSS THE AREA. THE BETTER CHANCES FOR SNOW WILL HOLD OFF UNTIL THURSDAY WHEN A THE NEXT TROUGH WILL MOVE ACROSS THE SOUTHERN AND CENTRAL ROCKIES. WEAK UPPER LEVEL FORCING AND THE ARRIVAL OF AN ARCTIC COLD FRONT WILL SET THE STAGE FOR SOME LIGHT SNOW.
CONVECTION SHOULD INCREASE IN COVERAGE AND INTENSITY AFTER 07/00Z AS A STRONG UPPER TROUGH BEGINS TO MOVE ACROSS THE REGION. STILL SEE THE DRY SLOTTING IN THE MID LEVELS QUICKLY ENDING THE PRECIP FROM SOUTHWEST TO NORTHEAST ACROSS THE REGION ON THURSDAY BUT IN THE WAKE OF THE PRECIPITATION WILL BE MUCH WARMER TEMPERATURES. THE OTHER SIGNIFICANT CHANGE TO THE FORECAST INVOLVES THE EJECTION OF THE LAST IN A SERIES OF UPPER LEVEL TROUGHS.
625 AM EST WED JAN 6 2016 HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE REGION THROUGH THURSDAY.
Temperatures should continue a little below normal on the north side of this front as high pressure moves across the Midwest. Dry conditions with this high will make for dewpoints in the upper 50s and lower 60s across southern IN and northern KY.
1003 AM EDT WED JUL 22 2015 A COLD FRONT STALLS OVER THE CAROLINAS TODAY AS HIGH PRESSURE BUILDS INTO THE LOCAL AREA FROM THE NORTHWEST. LOW PRESSURE TRACKS EAST ALONG THE FRONT DURING THURSDAY.
1232 PM EDT WED JUL 22 2015 A COLD FRONT WILL MOVE EAST OF THE AREA TODAY.
A WEST COAST TROUGH WILL INFLUENCE THE THE WEATHER ACROSS NORTHERN ARIZONA THROUGH A LEAST THIS WEEK. THE TROUGH WILL PROVIDE A DRY SOUTHWEST FLOW AND KEEP THE SUBTROPICAL RIDGE FAR ENOUGH TO THE EAST THAT A STRONG AND MOIST SOUTHEAST FLOW PATTERN CAN NOT GET ESTABLISHED SUFFICIENTLY.
HIGH PRESSURE WILL REMAIN THE DOMINANT FEATURE OVER MUCH OF THE REGION THROUGH THE END OF THE WORK WEEK. THE ONLY EXCEPTION TO THIS IS AN UPPER LEVEL WAVE PASSING THROUGH THE LOWER OHIO VALLEY MAY SPREAD A FEW SHOWERS AND THUNDERSTORMS INTO FAR SOUTHERN PORTIONS OF CENTRAL INDIANA LATE TONIGHT.
GOES DERIVED PWAT IMAGERY INDICATES DRIER AIRMASS OFF THE LOWER TX COAST SPREADING NW.
AS THE UPPER LEVEL RIDGE REMAINS ANCHORED OVER THE SOUTHERN STATES. UPPER-LEVEL RIDGE TO REBUILD ACROSS TEXAS ON THURSDAY. WILL BE IN THE FORM OF SHOWERS AND THUNDERSTORMS POSSIBLE ALONG THE EASTERN PERIPHERY OF THE RIDGE ACROSS SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA.
802 AM CDT WED JUL 22 2015 HIGH PRESSURE SYSTEM WILL CONTINUE TO PUSH TO THE EAST THROUGHOUT THE DAY TODAY.
715 AM EDT WED JUL 22 2015 HIGH PRESSURE BUILDS TODAY AND THURSDAY.
AFTERNOON THUNDERSTORM POTENTIAL FOR THE TRINITY COUNTY MOUNTAINS WILL DIMINISH TONIGHT AS AN APPROACHING UPPER LEVEL TROUGH BRINGS LESS FAVORABLE CONDITIONS FOR STORM DEVELOPMENT. THIS TROUGH WILL CAUSE INLAND TEMPERATURES TO FALL SLIGHTLY BELOW NORMAL OVER THE NEXT FEW DAYS. AN UPPER LEVEL TROUGH APPROACHING THE PACIFIC NORTHWEST AND NORTHWEST CALIFORNIA HAS TRIGGERED THUNDERSTORMS THROUGHOUT THE NIGHT OVER SISKIYOU/SHASTA COUNTIES AND POINTS EAST. THE HIGHER PEAKS OF TRINITY COUNTY WILL LIKELY SEE CONVECTIVE DEVELOPMENT AND POSSIBLY SHOWERS/THUNDERSTORMS ONCE AGAIN.
AMDAR SOUNDINGS LOOK DRIER AND MAJORITY OF MODELS ARE ONLY SHOWING VERY ISOLATED SHRA/TSRA DEVELOPING MAINLY SOUTHWEST OF THE HIGHWAY 59 CORRIDOR TODAY. WITH NORTHERN GULF CENTERED RIDGING PLACING SOUTHEASTERLY STEERING FLOW ACROSS THE REGION. AS SURFACE TEMPERATURES WARM INTO THE LOWER 90S BY NOON.
BROAD UPPER TROUGH WILL BE OVER THE REGION THROUGH THURSDAY.
BUT DRY AIR WILL BE ALSO STILL BE TRYING TO SOME DEGREE TO EASE IN FROM THE WEST AND NORTHWEST ALONG WITH THE CONTINUED INFLUENCE OF HIGH PRESSURE ALOFT WILL BE TRYING TO BUILD WEST AND NORTHWEST INTO THE STATE. PREVIOUS EXPERIENCE DEGREE OF WESTWARD RIDGING OF SAME AND THE AMOUNT OF SOUTHERLY COMPONENT TO THE WINDS ON THE WEST SIDE OF THE HIGH CAN REALLY CREATE PRETTY SUBSTANTIAL CHANGES IN THE COVERAGE AND PLACEMENT OF SHOWER AND STORM ACTIVITY. TO BE STRUGGLING WITH THESE ASPECTS AND MAY ALSO BE STRUGGLING WITH THE CLIMATOLOGICAL NORMS OF MONSOONAL MOISTURE PLUME PLACEMENT AND HIGH PRESSURE LOCATION AND ORIENTATION.
ISSUED BY NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 930 AM EDT WED JUL 22 2015 HIGH PRESSURE WILL BUILD OVER THE AREA FROM THE WEST THROUGH TONIGHT.
MAIN FORECAST CONCERNS WILL CENTER AROUND COOLER THAN NORMAL HIGH TEMPERATURES TODAY AND SMALL POPS IN OUR SOUTHWEST THIS EVENING. HIGH PRESSURE WAS CENTERED OVER IOWA WITH WEAK RETURN FLOW NOTED OVER THE CWA. WEAK UPPER LEVEL RIDGING WILL BUILD OVER THE NATION'S MID SECTION INTO THE WEEKEND. HAVE BOOSTED HIGHS A BIT AS FAVORABLE MIXING OCCURS UNDER THIS RIDGE.
944 AM EDT WED JUL 22 2015 DRY HIGH PRESSURE FOR WEDNESDAY INTO THE WEEKEND. THERE IS A SHOT AT A NEAR 50 DEGREE LOW TEMP IN THE E RANDOLPH CO AND THE HIGHEST ELEVATIONS IN THE N MOUNTAINS.
HIGH PRESSURE ACROSS THE REGION WILL MAINTAIN CLEAR SKIES BELOW 10K FT THROUGH THURS MORNING. TODAY AND TONIGHT EXPANSIVE AREA OF HIGH PRESSURE WILL REMAIN CENTERED OVER THE SOUTHERN GREAT LAKES/MID MISSISSIPPI VALLEY/OHIO VALLEY.
741 AM EDT WED JUL 22 2015 DRY WEATHER AND SEASONAL TEMPERATURES CAN BE EXPECTED INTO THE WEEKEND AS HIGH PRESSURE DOMINATES OVER THE UPPER OHIO REGION. WITH HIGH PRESSURE MOVING INTO THE REGION TODAY.
705 AM EDT WED JUL 22 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM CENTERED ACROSS QUEBEC WILL RESULT IN SOMEWHAT COOLER TEMPERATURES THROUGH THE END OF THE WORK WEEK.
WATER VAPOR IMAGERY SHOWS AN UPPER-LEVEL TROUGH MOVING ONSHORE ALONG THE WEST COAST.
1019 AM EDT WED JUL 22 2015 HIGH PRESSURE BUILDS TODAY AND THURSDAY.
AFTER TONIGHT THE HEAT WILL BE ON ONCE AGAIN AS MID LEVEL HEIGHTS RISE WITH STRENGTHENING RIDGE.
730 AM EDT WED JUL 22 2015 HIGH PRESSURE BUILDS TODAY AND THURSDAY.
749 AM EDT WED JUL 22 2015 A COLD FRONT WILL MOVE THROUGH FROM THE NORTHWEST THIS MORNING. A WEAK LOW PRESSURE AREA WILL DEVELOP ALONG THE FRONT AND WILL PASS TO THE SOUTH THURSDAY.