795
FXUS63 KLBF 171117
AFDLBF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
617 AM CDT SAT OCT 17 2026
KEY MESSAGES
- FREEZE WARNINGS REMAIN IN EFFECT SATURDAY MORNING FOR AREAS
EAST OF AN OGALLALA TO ARTHUR TO VALENTINE LINE WHERE LOWS ARE
EXPECTED TO FALL INTO THE MIDDLE TO UPPER 20S.
- DRY, MILD, AND BREEZY CONDITIONS ON SATURDAY WILL SUPPORT
ELEVATED TO NEAR-CRITICAL FIRE WEATHER CONDITIONS FAVORING
AREAS ALONG AND WEST OF HIGHWAY 83.
- WARMER AND DRY CONDITIONS CONTINUE THROUGH MUCH OF NEXT WEEK,
BEFORE A COLD FRONT APPROACHES SATURDAY AND BRINGS A THREAT
FOR SHOWERS AND THUNDERSTORMS.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED AT 330 AM CDT SAT OCT 17 2026
EARLY THIS MORNING, CLEAR SKIES WERE PREVALENT ACROSS THE REGION. AT
THE SURFACE, HIGH PRESSURE WAS DRIFTING EAST THROUGH CENTRAL
NEBRASKA. THE LIGHT AND VARIABLE WINDS WAS PROVING TO BE A
PROTOTYPICAL RADIATIONAL COOLING SETUP WITH MULTIPLE SITES HAVING
REPORTED TEMPERATURES FALLING PRECIPITOUSLY. EARLY SATURDAY MORNING
OBSERVATIONS HAD VALUES RANGING FROM THE UPPER 30S IN THE FAR WEST
TO UPPER 20S TOWARDS CENTRAL NEBRASKA. FREEZE WARNINGS REMAIN IN
PLACE FOR AREAS ALONG AND EAST OF AN OGALLALA TO ARTHUR TO VALENTINE
LINE. ELSEWHERE, A KILLING FREEZE HAS ALREADY OCCURRED AND NO
ADDITIONAL PRODUCTS ARE LIKELY FOR THE REMAINDER OF THE FALL SEASON.
TODAY/TONIGHT...HIGH PRESSURE WILL CONTINUE TO SLIDE SOUTH AND EAST
INTO THE LOWER MISSISSIPPI VALLEY. UPPER LEVEL RIDGING WILL RESIDE
ALONG THE CENTRAL ROCKIES WITH GENERAL WESTERLY DOWNSLOPING FLOW
ACROSS WESTERN NEBRASKA. LEE TROUGHING WILL INCREASE THROUGH THE DAY
AND KEEP THE PRESSURE GRADIENT CONSTRICTED LOCALLY. THIS WILL
SUPPORT GUSTY SOUTHWEST WINDS FOR MUCH OF THE AREA. WINDS ALOFT
REMAIN FAIRLY MARGINAL BUT A STOUT LLJ WILL AGAIN STRETCH FROM
EASTERN COLORADO UP THROUGH NORTHEAST NEBRASKA. THOUGH MIXING
HEIGHTS AREN'T ANTICIPATED TO BE OVERLY HIGH, A 25 TO 30 MPH SPEED
MAX AROUND 0.5 TO 1KM AGL WITHIN THE DRY AND WARM ENVIRONMENT WILL
BE ENOUGH TO GET WINDS GUSTS UP TO 30 MPH. AFTERNOON HIGHS WERE
BOOSTED USING A BLEND OF STATISTICAL MODELS WITH BIAS CORRECTION.
THIS PRODUCED A BLANKET 2-4F INCREASE FOR ALL LOCATIONS THOUGH THIS
FALLS SHORT OF RAW OUTPUT FROM RESPECTIVE MET/MAV SOLUTIONS. THE
RESULTING FORECAST VALUES CLOSELY ALIGN WITH THE RAW HRRR OUTPUT
WHICH TYPICALLY HANDLES BOUNDARY LAYER MIXING WELL SO ADDS
CONFIDENCE TO THE FINAL PRODUCT. A STRONG NORTHERN STREAM
DISTURBANCE WILL TRACK WEST TO EAST ACROSS CANADA AND PROMOTE RIDGE
BREAKDOWN BEGINNING LATE IN THE DAY. A FRONTAL BOUNDARY WILL SETTLE
SOUTH LATE AND FURTHER COMPRESS THE PRESSURE GRADIENT. THIS SHOULD
ALLOW GUSTY WINDS TO CONTINUE INTO THE OVERNIGHT HOURS. THIS SHOULD
LIMIT HOW FAR TEMPERATURES FALL TO BEGIN SUNDAY, BUT EVEN
CONSIDERING THIS, LOWS STILL MANAGE TO REACH THE 30S AND LOWER 40S.
SUNDAY/SUNDAY NIGHT...AFOREMENTIONED FRONTAL BOUNDARY WILL CONTINUE
TO SAG SOUTH INTO WESTERN NEBRASKA BEFORE STALLING BY LATE MORNING.
THIS WILL RESULT IN A TROUGH/WIND SHIFT LINE STRETCHING FROM
SOUTHWEST NEBRASKA UP THROUGH THE NORTHERN SANDHILLS. IT'S IN
VICINITY OF THIS FEATURE THAT WARMER TEMPERATURES SHOULD MATERIALIZE
WITH MODEST COLD AIR ADVECTION (CAA) TO THE NORTHWEST AND AMPLE
MOISTURE ADVECTION TO THE SOUTH AND EAST HINDERING AFTERNOON
TEMPERATURES SOMEWHAT. ONCE AGAIN, AFTERNOON HIGHS WERE BOOSTED
ACROSS THE BOARD TO MORE CLOSELY RESEMBLE MET/MAV OUTPUT. EVEN WITH
THESE INCREASES, THE FORECAST VALUES FALL SHORT ANYWHERE FROM 4-10F
FOR ANY ONE LOCATION. RAW OUTPUT FROM THESE PRODUCTS EXCEED THE 90TH
PERCENTILE NBM OUTPUT. THIS ISN'T OVERLY SURPRISING GIVEN NBM'S
INABILITY TO CAPTURE THE TRUE DIURNAL TREND WITHIN A DRY AND MILD
AIRMASS. POTENTIAL EXISTS FOR TEMPERATURES TO BE BOOSTED FURTHER
WITH LATER FORECASTS BUT GIVEN SOME UNCERTAINTY IN PLACEMENT OF THE
SURFACE TROUGH, WILL BEGIN THE UPWARD TREND WITHOUT FULLY MARRYING
THE FORECAST WITH THE WARMEST NWP OUTPUT. THOUGH NOT OVERLY WARM,
LOWS SUNDAY NIGHT SHOULD REACH THE MIDDLE TO UPPER 30S FOR MOST
LOCATIONS. THOUGH SOME SOLUTIONS SHOW ANOTHER RUN TOWARDS SUB-
FREEZING TEMPERATURES, NO HEADLINES ARE ANTICIPATED GIVEN ALL 27
ZONES IN THE LOCAL FORECAST WILL HAVE SEEN A FREEZE WARNING AND SUB-
FREEZING TEMPERATURES ALREADY.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED AT 330 AM CDT SAT OCT 17 2026
THE AREA REMAINS UNDER THE INFLUENCE OF UPPER RIDGING AS WE HEAD
INTO NEXT WEEK, WITH TEMPERATURES MODERATING BACK TO ABOVE AVERAGE
BY MIDWEEK. MONDAY WILL BE BRIEFLY COOLER BEHIND A WEAK COLD FRONT
THAT PUSHES THROUGH THE AREA ON SUNDAY, WITH WEAK WARM ADVECTION
DELAYED UNTIL MONDAY EVENING. THIS LEADS TO HIGHS IN THE 60S, STILL
NEAR AVERAGE FOR MID-OCTOBER. STRONGER WARM ADVECTION RETURNS BY
TUESDAY, WITH INCREASING SOUTHERLY WINDS EXPECTED THROUGH THE
AFTERNOON HOURS. THIS BOOSTS HIGHS BACK INTO THE UPPER 60S TO LOW
70S, WITH SUNNY SKIES AMID AMPLE SUBSIDENCE ALOFT. LITTLE CHANGE IS
EXPECTED FOR WEDNESDAY AND THURSDAY, WITH TEMPERATURES
MODERATING FURTHER INTO THE MIDDLE TO UPPER 70S AS THE AREA
REMAINS UNDER THE INFLUENCE OF UPPER RIDGING. THE UPPER PATTERN
LOOKS TO REMAIN RATHER STAGNANT THROUGH MUCH OF THE UPCOMING
WEEK, WITH AN OMEGA BLOCK PATTERN EVOLVING ACROSS THE CONUS.
LITTLE TO NO WEATHER CONCERNS ARE EXPECTED WITH THIS IN MIND,
WITH THE INCREASING SOUTHERLY FLOW ALLOWING FOR MODEST MOISTURE
RETURN AND PUSH DEWPOINTS INTO THE 50S. THIS PRECLUDES ANY
GREATER FIRE WEATHER CONCERNS, AND SHOULD LEAD TO LARGELY
PLEASANT FALL WEATHER CONDITIONS ACROSS THE AREA NEXT WEEK.
BY LATE WEEK, AN UPPER LOW WILL BEGIN TO EJECT EAST OUT OF THE FOUR
CORNERS REGION, BEGINNING TO CROSS THE ROCKIES BY FRIDAY NIGHT. AT
THE SURFACE, LOW PRESSURE WILL QUICKLY DEEPEN ACROSS SOUTHEASTERN
MONTANA. THIS SURFACE LOW WILL BEGIN TO EJECT EAST INTO THE DAKOTAS
EARLY SATURDAY MORNING, DRAGGING A COLD FRONT INTO THE AREA SATURDAY
AFTERNOON. THE TIMING OF THIS FRONTAL PASSAGE WILL NEED TO BE
MONITORED, AS GUIDANCE SUGGESTS AT LEAST MODEST INSTABILITY WILL
DEVELOP AHEAD OF THE BOUNDARY. THUNDERSTORM DEVELOPMENT WOULD BE
POSSIBLE ACROSS THE AREA SATURDAY EVENING, DEPENDING ON FRONTAL
POSITION. THIS WILL CONTINUE TO BE MONITORED, THOUGH ANY SEVERE
THREAT APPEARS LOW AT THIS TIME DUE TO WEAK DEEP LAYER SHEAR.
AVIATION /12Z TAFS THROUGH 12Z SUNDAY/
ISSUED AT 620 AM CDT SAT OCT 17 2026
VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH TOMORROW MORNING
ACROSS ALL OF WESTERN AND NORTH CENTRAL NEBRASKA. WINDS
STRENGTHEN FROM THE SOUTHWEST THIS AFTERNOON, WITH GUSTS OF 25
TO 35KTS EXPECTED FOR TERMINALS EAST OF HWY 61. SOUTHERLY WINDS
WILL THEN CONTINUE INTO TONIGHT, AT 10 TO 15KTS.
LBF WATCHES/WARNINGS/ADVISORIES
FREEZE WARNING UNTIL 10 AM CDT /9 AM MDT/ THIS MORNING FOR
NEZ005>010-024>029-035>038-057>059-069>071.
SHORT TERM...NMJ
LONG TERM...BROWN
AVIATION...BROWN
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