Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 147 PM CDT Sat Mar 25 2017/ Have brief upper ridging over the area today before an upper trough moving across CA/NV today moves over the region Sunday. Will get another dose of brief ridging Monday before a stronger trough moving out of CA develops into a cut off low over southern NV later that day.
255 AM EDT Sun Mar 26 2017 High pressure remains offshore the southeast coast through Monday.
as dry slotting aloft around the closed low over Scntrl TX has again entrained ENE into the region. These -SHRA should begin to diminish Saturday evening as drier air aloft begins to entrain SE behind the parent upper trough axis as it begins to slowly nudge SE as well. Under mostly cloudy skies, temperatures only forecast to climb into the low to mid 80s on Saturday.
The cumulus clouds will redevelop over the higher terrain Saturday afternoon, but still not enough moisture for convection. The main story is the warming trend accompanying a building ridge through the weekend.
Other than some high clouds our area remains under a dry high pressure system that will continue to dominate the pacnw weather into tomorrow.
A cold front will slowly sag south SE late in the period.
850 PM MDT FRI JUN 3 2016 Strong high pressure aloft will bring us dry/quiet weather tonight. A strong upper ridge will build into the area this weekend and provide warmer and dry weather.
Water vapor loops seem to support this as the dry slot is moved slightly farther east by the upper trough over Central Texas. as dry slotting aloft around the closed low over Scntrl TX has again entrained ENE into the region. These -SHRA should begin to diminish Saturday evening as drier air aloft begins to entrain SE behind the parent upper trough axis as it begins to slowly nudge SE as well. Under mostly cloudy skies, temperatures only forecast to climb into the low to mid 80s on Saturday.
1142 PM CDT FRI JUN 3 2016 A cold front was moving into northeast NE at 19z, and will sweep across the area this evening. The upper low helping push the cold front is across the northern plains. Areas along and east of the Missouri River will be in the cool trough associated with that on Saturday afternoon, which could result in an isolated shower or thunderstorm by late morning through mid afternoon Saturday.
A cold front will make its way south with a shift to north winds late tonight into Saturday morning. /issued 240 PM CDT FRI JUN 3 2016/ Scattered showers, and isolated thunderstorms, continue around the upper low this afternoon. The wind shift associated with the cold front will impact the northwest zones around 12Z and shift into the I44 corridor around 18Z.
However, there is a bit more low level convective resistance in the lower layers.
Lows in the lower to mid 70s. Atlantic ridge axis across central Florida will gradually shift southward through the weekend as trough aloft drives a weak cold front into the southeast United States.
935 PM EDT FRI JUN 3 2016 A weakening cold front will move slowly across the region today.
An upper level low continues to slowly track east across eastern Texas this afternoon. Scattered showers and a few thunderstorms have develop across the area as energy from the low spreads north from the low and across the area. Additional showers and storms are expected to redevelop overnight tonight into Saturday morning as the low across Texas continues to slowly track east. An upper level trough currently over the Northern Plains will drop south through the region Saturday into Saturday night, and will send a surface cold front through the region Saturday afternoon/early evening. Widespread severe weather is not expected, but with height falls from the approaching trough, instability will increase some and steeper lapse rates will develop and with lift from the front a few strong storms will be possible but will be localized in nature.
Atlantic high pressure will continue to ridge across Florida and the eastern Gulf of Mexico through Saturday, with winds and seas remaining below headline criteria.
1029 PM MDT FRI JUN 3 2016 Apart from a few passing mid and high level clouds, sunny and dry conditions will persist through the short term as a broad ridge of high pressure dominates the western CONUS.
836 PM CDT FRI JUN 3 2016 A cold front was moving into northeast NE at 19z, and will sweep across the area this evening. The upper low helping push the cold front is across the northern plains. Areas along and east of the Missouri River will be in the cool trough associated with that on Saturday afternoon, which could result in an isolated shower or thunderstorm by late morning through mid afternoon Saturday.
It does appear that the better threat for showers and a few storms will be across eastern zones where weak lift ahead of the diffuse upper trough axis may occur. Bain /ISSUED 746 PM CDT FRI JUN 3 2016/ /00Z TAFs/ An upper low remains centered over Central Texas where the more intense showers and storms reside.
Strong upper trough axis is currently positioned from east TX northward through the upper Midwest.
922 PM EDT FRI JUN 3 2016 A weakening cold front will move slowly across the region today.
959 PM CDT FRI JUN 3 2016 Water vapor loop indicated an upper level jet was digging on the west side of an upper low. The upper low was located over far northwest MN. Beyond midnight, should begin seeing some clearing as an upper ridge begins amplifying over the northern and Canadian rockies and the upper low pulls off into the Upper Great Lakes.
Water Vapor Satellite trends this evening place an upper level low just southwest of Fort Worth Texas.
Warm dry high pressure will remain in place across the region through the weekend. A ridge of high pressure remains in place over the Great Basin this evening, keeping Utah under a warm, dry, and stable airmass.
Chattanooga Airport, TN 69 87 69 82 / 20 60 80 60 Knoxville McGhee Tyson Airport, TN 67 86 68 80 / 20 50 70 70 Oak Ridge, TN 68 86 69 80 / 30 60 70 60 Tri Cities Airport, TN 65 85 66 78 / 30 70 60 70.
Additional shra/tsra though are again xpcted on Sat, as a weak cold front settles into the area.
/issued 327 PM CDT FRI JUN 3 2016/ (Tonight and Saturday) Upper low spinning near Brownwood this afternoon. Upper low should drift a little farther east for Saturday, which should keep the best concentration of storms across Central Texas. With a little more sunshine though and with warmer temperatures, will likely still see a few showers and storms for the afternoon hours. Highs in the low to mid 80s looks right on target. 07 (Saturday night through next Friday) The persistent upper low that has finally moved away from the CWA will continue moving to the south and by Saturday night will be nearing deep south Texas.
732 PM EDT FRI JUN 3 2016 Moisture will circulate into the forecast area on the backside of high pressure centered off the southeast coast and ahead of a cold front slowly approaching from the west.
a cold front will begin to move into and across the area later tonight into Saturday but chances of any showers/storms along the front overnight are very low until maybe early Saturday so took out POPS across north for this evening and left some low POPS in north central OK for after 06Z. A cold front will make its way south with a shift to north winds late tonight into Saturday morning. /issued 240 PM CDT FRI JUN 3 2016/ Scattered showers, and isolated thunderstorms, continue around the upper low this afternoon. The wind shift associated with the cold front will impact the northwest zones around 12Z and shift into the I44 corridor around 18Z.
819 PM EDT FRI JUN 3 2016 A low pressure system approaching from the plains will tap moisture over the lower Mississippi Valley and bring a chance of showers south of route 30 late tonight. Fair wx will cont most of tonight as ridging across the region moves east.
916 PM EDT FRI JUN 3 2016 A slow moving cold front will keep in the risk for showers and storms mainly south and east of Pittsburgh this evening.
Water vapor loop indicated an upper level jet was digging on the west side of an upper low. The upper low was located over far northwest MN. Beyond midnight, should begin seeing some clearing as an upper ridge begins amplifying over the northern and Canadian rockies and the upper low pulls off into the Upper Great Lakes.
1017 PM EDT FRI JUN 3 2016 Moisture will circulate into the forecast area on the backside of high pressure centered off the southeast coast and ahead of a cold front slowly approaching from the west.
Energy from the upper low over TX will continue to bring scattered rain chances to the CWA overnight. As the upper low over Texas continues to spin, it has been sending bits of upper level energy over our region. I would expect that tomorrow's coverage will be more than today's as the upper low slowly migrates south and opens into a trough. I think the west will again be "cooler" in the lower to mid 80s whereas the east should reach the mid to upper 80s/possibly around 90.
932 PM PDT FRI JUN 3 2016 High pressure aloft will continue hot weather inland through Saturday with temperatures some 15 to 20 degrees above average.
935 PM EDT FRI JUN 3 2016 High pressure overhead will build to New England by Saturday.
Our 00Z sounding really wiped out a lot of our instability and even with the cooler temperatures aloft, -7C at 500MB, lapse rates are weaker than previous days. Models indicate an area of low pressure southeast of the upper low will be between San Antonio and Victoria overnight. Combined with modest upper level difluence to the east of the upper low sinking to the south. The upper low will be over the Coastal Bend Saturday afternoon and went with categorical POPs near the low.
746 PM CDT FRI JUN 3 2016 /00Z TAFs/ An upper low remains centered over Central Texas where the more intense showers and storms reside. These will continue to pivot around the low center, but should wane with nocturnal losses in instability.
721 PM EDT FRI JUN 3 2016 High pressure overhead will build to New England by Saturday.
A northwest to northerly flow aloft will be over Colorado tonight with an upper level ridge to the west. Moisture is suspect however with primarily weak mid level subsidence behind an upper trough the as moved into the upper midwest. Another weak cold front is progged to push through Denver Saturday morning in the 12-15z window. Could see slightly cooler temperatures vs tda but thats about it. so will keep some pops in the high country. A strong upper level ridge over the great basin combined with a trough over the northern portions of the US will bring continued NW flow over the region.
High pressure aloft will continue hot weather inland through Saturday with temperatures some 15 to 20 degrees above average.
520 PM MDT FRI JUN 3 2016 Apart from a few passing mid and high level clouds, sunny and dry conditions will persist through the short term as a broad ridge of high pressure dominates the western CONUS.
745 PM EDT FRI JUN 3 2016 A slow moving cold front will keep in the risk for showers and storms mainly south and east of Pittsburgh this evening.
with HX (Heat Indices) below 100 deg despite temps in the low 100s. but the offshore upper low will move inland over the weekend lowering max temps just slightly and possibly trigger mtn thunderstorms.
732 PM EDT FRI JUN 3 2016 Aviation A ridge of high pressure will continue to bring fair weather through tonight. An approaching low pressure system will bring clouds and potential for scattered showers and a few thunderstorms this weekend.
High pressure over the region will maintain very warm and dry weather conditions across inland areas into Saturday.
954 PM EDT FRI JUN 3 2016 Weak high pressure will cover the region tonight.
1247 PM EDT MON APR 18 2016 A COLD FRONT WILL BRING A FEW SHOWERS TO UPSTATE NY TONIGHT.
1153 AM EDT MON APR 18 2016 HIGH PRESSURE OVER THE REGION WILL WEAKEN THROUGH THE DAY ALLOWING A WEAK COLD FRONT TO DRIFT ACROSS THE AREA LATE TONIGHT.
645 AM CDT MON APR 18 2016 313 AM CDT ONE FINAL DAY OF VERY WARM AND DRY WEATHER IS EXPECTED TODAY BEFORE A BACK DOOR COLD FRONT MOVES DOWN LAKE MICHIGAN AND OVER NORTHERN ILLINOIS LATE TONIGHT INTO EARLY TUESDAY MORNING AS THE LARGER SCALE BLOCKED WEATHER PATTERN OVER THE CENTRAL CONUS BEGINS TO BREAK DOWN. WHILE TEMPERATURES TODAY WILL AGAIN REACH INTO THE LOW 80S INLAND. COOLER WEATHER IS EXPECTED OVER NORTHERN ILLINOIS ON TUESDAY IN THE WAKE OF THE FRONTAL PASSAGE. IN ADDITION TO THE COOLER WEATHER. THE BLOCKING UPPER RIDGE. THE LARGE UPPER LOW OVER THE CENTRAL ROCKIES WILL GRADUALLY SHIFT EASTWARD OVER THE PLAINS BY TUESDAY.
DRY WEATHER TO PREVAIL AS UPPER RIDGING HANGS ON FOR ANOTHER DAY OR TWO.
A STRONG RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION PROVIDING CLEAR SKIES.
EARLY MORNING WV IMAGERY SHOWS LARGE SCALE UPPER LOW CENTERED OVER NORTHEAST COLORADO WITH ITS EASTERN EXTENT APPROACHING THE CENTRAL MISSISSIPPI RIVER VALLEY.
1040 AM EDT MON APR 18 2016 A LARGE UPPER LEVEL RIDGE AND ASSOCIATED HIGH PRESSURE AREA WILL MAINTAIN SUNNY AND WARM CONDITIONS THIS AFTERNOON. A COLD FRONT WILL THEN PUSH INTO THE AREA AND BRING INCREASING CLOUDS AND COOLER TEMPERATURES FOR TUESDAY.
930 AM CDT MON APR 18 2016 A COLD FRONT CONTINUES IN EASTERN OKLAHOMA WITH MOISTURE STREAMING NORTHWARD AHEAD OF IT. DEEP CUT OFF UPPER LOW CONTINUES TO SPIN ALONG THE WYOMING/COLORADO BORDER WITH DEEP MOISTURE PLUME BEING PULLED INTO THE CENTRAL PLAINS. UPPER LOW HAS MOVED VERY LITTLE OVER THE PAST FEW DAYS AS STRONG RIDGING CENTERED JUST TO THE EAST OF ARKANSAS HAS EFFECTIVELY HALTED ANY MOVEMENT. UPPER LOW WILL ONLY MAKE IT AS FAR EAST AS THE CENTRAL PLAINS BY THE END OF THE PERIOD AS IT ATTEMPTS TO MAKE PROGRESSES AGAINST THE RIDGE.
All locations still look to top out in the lower 80s with mid 80s expected for the Louisville Metro. Omega blocking pattern continues with 584m ridge from magnolia state thru Ohio valley.
740 AM EDT MON APR 18 2016 A COLD FRONT WILL MOVE SOUTH OUT OF CANADA TODAY. THE SHOWERS WILL SPREAD SOUTH OVERNIGHT AS LOW PRESSURE DEVELOPS ALONG THE FRONT.
632 AM CDT MON APR 18 2016 The high pressure ridge over the Midwest will weaken and retreat southward today as a trough moves into southeast Canada. This will allow the closed low over the central Rockies to edge closer with thicker high clouds moving in late in the afternoon. Highs again should generally be in the low 80s. and low pressure moving into the northern Plains. Models continue to trend slower with backdoor cold front moving southward out of WI and into northeast IL Tue afternoon with much cooler air staying north of central IL. Cutoff low will weaken and eventually open up into an upper level trof as it tracks eastward into the upper Midwest Wed night and through IL on Thu. Cooler highs in the upper 60s/lower 70s Wed/Thu due to more clouds and showers around.
1004 AM EDT MON APR 18 2016 HIGH PRESSURE OVER THE AREA TODAY. A WEAK COLD FRONT WILL CROSS THE AREA TUESDAY.
1051 AM EDT MON APR 18 2016 AVIATION SECTION UPDATED THE PERSISTENT STRONG RIDGE OF HIGH PRESSURE WILL KEEP IT WARM AND DRY THROUGH TUESDAY. THE RIDGE WILL MOVE OFF TO THE EAST AND ALLOW A PLAINS SYSTEM TO MOVE THROUGH THE OHIO VALLEY AND GREAT LAKES LATE IN THE WEEK.
HIGH PRESSURE SETTLING OVER THE SOUTHEAST HAS BROUGHT DRYING AND MORE STABLE CONDS LOCALLY. THE HIGH SURF ADVISORY REMAINS IN EFFECT THROUGH THIS EVENING.
603 AM CDT MON APR 18 2016 12Z TAF CYCLE A STRONG CLOSED UPPER LOW OVER THE CENTRAL ROCKIES TODAY WILL DIG SOUTH TONIGHT AND BRING CHANCES FOR CONVECTION TO THE WESTERN AND CENTRAL PANHANDLES BETWEEN 06Z AND 12Z TUESDAY. /ISSUED 245 AM CDT MON APR 18 2016/ WATER VAPOR SATELLITE LOOP SHOWS UPPER LOW OVER COLORADO WITH A COUPLE OF VORT MAX SPOKES AROUND IT.
729 AM EDT MON APR 18 2016 WITH HIGH PRESSURE IN CONTROL ACROSS THE REGION.
THE EASTERN STATES RIDGE SHOULD REMAIN IN PLACE AGAIN TODAY PROVIDING THE SOUTHERN APPALACHIAN REGION WITH ANOTHER DAY OF NEARLY FULL INSOLATION. SOME CIRRUS FROM THE DEEP LIFT OVER TEXAS AND LOUISIANA COMPLIMENTS OF THE BLOCKING PATTERN MAY DRIFT INTO WESTERN SECTIONS DURING THE AFTERNOON BUT SHOULD NOT BE TOO PROBLEMATIC. CHATTANOOGA AIRPORT, TN 82 54 83 56 / 0 0 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 81 53 81 56 / 0 0 0 10 OAK RIDGE, TN 82 54 83 56 / 0 0 0 10 TRI CITIES AIRPORT, TN 81 48 80 51 / 0 0 0 10.
1004 AM EDT MON APR 18 2016 HIGH PRESSURE TODAY. AS THE CENTER OF THE WARM UPPER RIDGE WILL BE OVER THE AREA. RESULTING IN TEMPERATURES REACHING INTO THE LOWER AND MID 80S THIS AFTERNOON. WINDS WILL BE LIGHT UNDER WEAK HIGH PRESSURE WHICH WILL KEEP CRITERIA BELOW THAT NEEDED FOR RED FLAG.
A LOW PRESSURE SYSTEM EAST OF THE AREA WILL KEEP TEMPERATURES CLOSE TO NORMAL TODAY AND MONDAY BEFORE HIGH PRESSURE BRINGS MUCH WARMER TEMPERATURES TO THE AREA BY TUESDAY. A BROAD AREA OF LOW PRESSURE OVER THE INTERMOUNTAIN WEST WILL MAKE LITTLE PROGRESS OVER THE NEXT COUPLE OF DAYS AS HIGH PRESSURE TO THE EAST AND WEST HOLD IT IN PLACE. THIS COMBINATION OF FACTORS SENDS WEST COAST RIDGING INLAND OVER THE MOJAVE DESERT AND GREAT BASIN AND WILL SEND TEMPERATURES TO WELL ABOVE NORMAL LEVELS.
934 AM PDT MON APR 18 2016 STRONG HIGH PRESSURE OVER THE REGION TODAY WILL BRING SUNNY AND WARM CONDITIONS WITH TEMPERATURES WELL ABOVE AVERAGE. THIS RIDGE WILL BEGIN TO WEAKEN AND A GRADUAL COOLING TREND WILL OCCUR.
727 AM EDT MON APR 18 2016 A QUIET AND DRY WEATHER PATTERN WILL CONTINUE AS HIGH PRESSURE REMAINS PARKED OVER THE SOUTHEAST. THEN A SOUTHWEST WIND PRODUCING EVEN WARMER HIGHS INTO THE LOWER TO MID 80S ON TUESDAY.
919 AM EDT MON APR 18 2016 AFTER ANOTHER WARM AND SUNNY DAY THIS AFTERNOON, A COLD FRONT WILL BRING A FEW SHOWERS TO UPSTATE NY TONIGHT.
437 AM PDT MON APR 18 2016 HIGH PRESSURE ALOFT ALONG THE WEST COAST WILL CONTINUE DRY AND VERY WARM WEATHER AGAIN TODAY WITH NEAR RECORD HIGH TEMPERATURES POSSIBLE NEAR THE COAST.
HIGH SURF/HIGH RIP CURRENT RISK CONTINUES ALONG THE NORTHEAST LATE MORNING SURFACE ANALYSIS DEPICTS A SPRAWLING DOME OF HIGH PRESSURE (1029 MILLIBARS) COVERING THE EASTERN THIRD OF THE CONUS. WITH DEEP TROUGHING SITUATED JUST OFF THE U. AMPLIFIED RIDGING EXTENDING FROM THE GREAT LAKES SOUTHWARD TO THE LOWER MISSISSIPPI RIVER VALLEY. AND A CUTOFF DEEP TROUGH OVER THE ROCKIES AND DESERT SOUTHWEST. AND OUR LOCAL PRESSURE GRADIENT IS BEGINNING TO RELAX AS SURFACE RIDGING BUILDS SOUTHWARD FROM THE APPALACHIANS. ONSHORE FLOW WILL KEEP COASTAL HIGHS IN THE LOWER 70S TODAY.
732 AM EDT MON APR 18 2016 HIGH PRESSURE OVER THE REGION WILL WEAKEN THROUGH THE DAY ALLOWING A WEAK COLD FRONT TO DRIFT ACROSS THE AREA LATE TONIGHT.
/ISSUED 438 AM CDT MON APR 18 2016/ PERSISTENT UPPER LEVEL OMEGA BLOCK PATTERN WITH TROUGHING OVER THE COLORADO ROCKIES. RIDGING ACROSS OUR EASTERN UNITED STATES AND ANOTHER TROUGH OVER THE WESTERN ATLANTIC CONTINUES TO BRING HEAVY TRAINING RAINS ACROSS TEXAS OVERNIGHT SPAWNING FLASH FLOOD WARNINGS MAINLY WEST OF THE HOUSTON AREA. DO NOT THINK WE NEED TO ISSUE FLOOD WATCH YET FOR SOUTHEAST TEXAS AND MAY NOT NEED TOO IF THE UPPER LEVEL TROUGH TO THE WEST BEGINS TO LIFT OUT LATER TODAY INTO TUESDAY.
100 PM EDT MON APR 18 2016 DRY HIGH PRESSURE WILL DOMINATE THROUGH TUESDAY.
1147 AM EDT MON APR 18 2016 HIGH PRESSURE WILL PROVIDE ONE MORE DAY OF MAINLY SUNNY SKIES AND WELL ABOVE NORMAL TEMPERATURES. A WEAK COLD FRONT WILL MOVE THROUGH THE AREA ON TUESDAY. LEADING TO SLIGHTLY COOLER TEMPERATURES. TEMPERATURES ARE RUNNING A FEW DEGREES WARMER THAN YESTERDAY. THE PERSISTENT MID/UPPER LEVEL RIDGE AXIS WILL FINALLY START TO BREAK DOWN ON TUESDAY AS SHORT WAVE ENERGY RIDES UP INTO THE GREAT LAKES REGION. AN ASSOCIATED WEAK COLD FRONT WILL PUSH DOWN INTO OUR AREA ON TUESDAY. WILL GO AHEAD AND RANGE HIGHS FROM THE LOW 70S IN THE NORTH TO THE UPPER 70S IN THE SOUTH. BUT AM A LITTLE WORRIED THE SOUTH COULD END UP A LITTLE WARMER THAN THAT IF THE CAA IS SLOW ENOUGH.
640 AM CDT MON APR 18 2016 00Z UPPER-AIR ANALYSIS AND EARLY MORNING WATER VAPOR IMAGERY REVEALED A MID TO UPPER-LEVEL CYCLONE OVER WRN CO WITH AN ASSOCIATED VORTICITY LOBE OVER THE SRN HIGH PLAINS. AND INTO ERN SD BY THIS EVENING WITH THE TRAILING COLD FRONT ADVANCING EWD THROUGH THE MID AND LOWER MO VALLEY BY 12Z/TUE. ESPECIALLY THIS AFTERNOON ALONG THE EWD-ADVANCING COLD FRONT. THE WIDESPREAD CLOUDS AND PRECIPITATION WILL STUNT THE DIURNAL TEMPERATURE CURVE WITH HIGHS RANGING FROM THE LOWER 50S IN NERN NE TO MID 60S IN SERN NE/SWRN IA. DECREASING CLOUDS COUPLED WITH LOW-LEVEL DRY ADVECTION WITHIN THE POST-FRONTAL AIR MASS WILL YIELD COOLER LOWS RELATIVE TO PREVIOUS NIGHTS WITH VALUES FALLING GENERALLY INTO THE 40S. CONTRIBUTING TO THE EWD MOVEMENT OF THE PARENT CLOSED LOW INTO WRN NE.
933 AM EDT MON APR 18 2016 HIGH PRESSURE OVER THE REGION WILL WEAKEN THROUGH THE DAY ALLOWING A WEAK COLD FRONT TO DRIFT ACROSS THE AREA LATE TONIGHT.
904 AM EDT MON APR 18 2016 DRY STABLE CONDITIONS UNDER DEEP LAYERED RIDGING OVER THE REGION WILL SUPPORT PLEASANT DRY WEATHER ACROSS THE ENTIRE FORECAST AREA THE REMAINDER OF TODAY. WITH TEMPS CLIMBING INTO THE LOWER 80S DURING THE AFTERNOON. A RATHER TIGHT GRADIENT (4-5MB) BETWEEN HIGH PRESSURE OVER THE EASTERN SEABOARD AND LOW PRESSURE OVER THE OPEN ATLANTIC WELL EAST OF THE MID ATLANTIC COAST WILL MAINTAIN A BREEZY NORTHEAST WIND FLOW OVER THE GULF WATERS THE REMAINDER OF TODAY.
938 AM EDT MON APR 18 2016 HIGH PRESSURE WILL MAINTAIN WARM AND DRY WEATHER TODAY. A WEAK OVERNIGHT COLD FRONT IS EXPECTED TO BRING A FEW CLOUDS AND COOLER TEMPERATURES TUESDAY. HIGH PRESSURE SHOULD MAINTAIN DRY WEATHER TODAY. A WEAK COLD FRONT IS PROGGED TO CROSS OVERNIGHT. HIGH TEMPERATURES WILL BE ROUGHLY 10 DEGREES COOLER ON TUESDAY WITH THE DROP IN H500 HEIGHTS/H850 TEMPS.
STRONG HIGH PRESSURE ALOFT ALONG WITH LOW LEVEL OFFSHORE FLOW WILL RESULT IN WARM SUNNY WEATHER THROUGH TUESDAY.
532 AM MDT MON APR 18 2016 EARLY MORNING WV IMAGERY SHOWS LARGE SCALE UPPER LOW CENTERED OVER NORTHEAST COLORADO WITH ITS EASTERN EXTENT APPROACHING THE CENTRAL MISSISSIPPI RIVER VALLEY.
624 AM CDT MON APR 18 2016 Expansive closed upper low over the Rockies will send numerous rounds of rain and a few storms into our area over the next several days as the system slowly spins eastward into the Plains. Most rain chances will be tied to ill-defined weak vorticity maxima rotating around the low, which will be difficult to pinpoint more than a day out or so.
HIGH PRESSURE ALOFT WILL AGAIN RESULT IN WARM TO VERY WARM TEMPERATURES ACROSS THE REGION TODAY. A HIGH AMPLITUDE RIDGE AXIS THAT EXTENDS NORTHWARD INTO THE PACIFIC NORTHWEST REMAINS CENTERED OVER THE REGION THIS MORNING. CANNOT RULE OUT A FEW OF THE WARMER INLAND VALLEY LOCATIONS REACHING INTO THE LOWER 90S THIS AFTERNOON. A COOLING TREND WILL FINALLY RETURN ON TUESDAY AS A DEVELOPING MID/UPPER LEVEL LOW OVER THE EASTERN PACIFIC APPROACHES THE CALIFORNIA COAST.
707 AM EDT MON APR 18 2016 RIDGING AT THE SURFACE AND ALOFT WILL LEAD TO MODERATING TEMPERATURES EARLY THIS WEEK. A MOISTURE STARVED BACKDOOR COLD FRONT WILL SLIP THROUGH THE AREA TUESDAY NIGHT. THE LOW AND MID-LEVEL ANTICYCLONE WILL SHIFT SOUTH INTO THE SOUTHERN APPALACHIANS TODAY.
/ISSUED 311 AM CDT MON APR 18 2016/ THE UPPER LOW THAT JUST WOULDN'T GO REMAINS PARKED OVER THE CENTRAL ROCKIES WHERE IT IS FORECAST TO MEANDER EVER SO SLIGHTLY EASTWARD OR NORTHEASTWARD THROUGH 12Z TUESDAY. ONE WEAK DISTURBANCE EMBEDDED IN THE FLOW WILL APPROACH THROUGH FAR WEST TEXAS TODAY WHILE ANOTHER LOBE OF ENERGY ROTATES AROUND THE BASE OF THE LOW ACROSS NEW MEXICO AND TOWARD NORTHWEST TEXAS TONIGHT. RELATIVELY COOL RIDGING WILL REMAIN IN PLACE.
THE CLOUDS ARE FROM MOISTURE ROTATING AROUND THE CLOSED UPPER-LEVEL LOW PRESSURE SYSTEM ALONG THE CO/UT STATELINE. HIGH PRESSURE ALOFT WILL KEEP SKIES CLEAR OVER WEST CENTRAL / NORTHWEST MONTANA (INCLUDING KCTB KHLN). A LOW PRESSURE SYSTEM OVER THE WESTERN GREAT PLAINS WILL SPREAD MID/HIGH LEVEL CLOUDS OVER THE AREA ALONG AND SOUTHEAST OF A KBZN-KGTF-KHVR LINE THROUGH THE PERIOD WITH A FEW SHOWERS POSSIBLE IN THE MOUNTAIN AREAS FROM KBZN TO KLWT, WHICH MAY OBSCURE MOUNTAIN TOPS THERE AT TIMES.
Filtered sunshine for today as high clouds stream ne across the area ahead of an upper trough.