Area Forecast Discussion
Issued by NWS Goodland, KS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS63 KGLD 252008
AFDGLD

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
208 PM MDT SAT OCT 25 2014

.SHORT TERM...(THIS EVENING THROUGH SUNDAY)
ISSUED AT 1253 PM MDT SAT OCT 25 2014

LATEST WV IMAGERY AND RAP H5 ANALYSIS SHOW LARGE SCALE RIDGE
CENTERED OVER THE SOUTHERN PLAINS...EXTENDING NORTH INTO THE
CANADIAN ROCKIES. AT THE SURFACE LOW PRESSURE IS IN PLACE OVER SE
COLORADO AND NORTHEAST NEW MEXICO WITH HIGH PRESSURE OVER THE
NORTHERN PLAINS. A STALLED FRONT IS BISECTING OUR CWA...EXTENDING
FROM NE COLORADO TO CENTRAL KANSAS (ROUGHLY ALONG A KAKO-KGLD-
KHYS LINE).

WITH STRONG RIDGE IN PLACE AND MAIN STORM TRACK WELL NORTH OF THE
CWA...PRIMARY FORECAST CONCERNS WILL BE ABOVE NORMAL TEMPS AGAIN
SUNDAY AND POTENTIAL FOR DENSE FOG TONIGHT.

REGARDING DENSE FOG...NAM/RUC/HRRR RH AND VIS FIELDS CONTINUE TO
SHOW POSSIBILITY OF DENSE FOG DEVELOPMENT NORTH OF THE QUASI-
STATIONARY FRONT. SREF PROBABILITIES ARE ALSO SHOWING THIS.
LOCATION OF FRONT AND MOISTURE POOLING ALONG/NORTH OF THIS FEATURE
WILL LIKELY BE CRITICAL TO DENSE FOG LOCATION...IN ADDITION NEAR
INVERSION LAYER WINDS 10-20KT MAY ALLOW FOR ENOUGH MIXING TO KEEP
VIS HIGHER UNTIL LOW LEVELS COMPLETELY DECOUPLE AROUND SUNRISE.
THERE IS ALSO INDICATION FROM PREVIOUS MODEL RUNS AND CURRENT
GFS THAT FRONT WILL BE FURTHER NORTH AND EAST WHICH WOULD ALLOW
LOWER TD VALUES TO ADVECT EASTWARD WITH SHIFT IN LOW LEVEL FLOW.
CONFIDENCE IS HIGH IN FOG DEVELOPMENT...BUT LOCATION IS ENOUGH OF
A QUESTION TO HOLD OFF ON ISSUANCE OF ADVISORY DURING DAYTIME
UPDATE PACKAGE.

TEMP FORECAST SUNDAY IS ALSO COMPLICATED BY POSITION OF QUASI-
STATIONARY FRONT WITH SLIGHTLY LOWER TEMPS ALOFT NORTH OF THIS
FRONT. ANY LINGERING STRATUS/FOG WOULD ALSO THROW A WRENCH INTO
THINGS...ESPECIALLY IN OUR NORTHEAST. OVERALL I THINK TEMPS WILL
BE VERY SIMILAR TODAY...WITH SLIGHTLY "COOLER" TEMPS NORTH OF THE
FRONT JUST LIKE TODAY. EITHER WAY TEMPS ARE EXPECTED TO BE IN THE
LOWER 80S FOR MOST PARTS OF THE CWA SUNDAY...AND IF FRONT LIFTS
NORTHEAST WESTERLY LOW LEVEL FLOW COULD SUPPORT RECORD HIGHS IN
THE MIDDLE TO UPPER 80S.

.LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY)
ISSUED AT 206 PM MDT SAT OCT 25 2014

UPPER FLOW WILL BE SOUTHWEST SUNDAY NIGHT AND MONDAY AHEAD OF A
TROUGH THAT MOVES FROM THE NORTHERN ROCKIES INTO THE NORTHERN AND
CENTRAL PLAINS.  THE TROUGH WILL MOVE EAST MONDAY NIGHT WITH
NORTHWEST FLOW FOLLOWING TUESDAY AND TUESDAY NIGHT. A SURFACE TROUGH
WILL BE OVER NORTHWEST KANSAS SUNDAY NIGHT FOLLOWED BY HIGH PRESSURE
MONDAY.  HIGH PRESSURE WILL REMAIN OVER THE AREA THROUGH TUESDAY
NIGHT.

THE UPPER TROUGH THAT COMES THROUGH HAS GOOD DYNAMICS BUT MOISTURE
IS LACKING.  FORECAST SOUNDINGS INDICATE DRY LOW LEVELS WITH
MARGINAL SATURATION AT MID LEVELS.  ALTHOUGH THERE IS A SLIGHT
CHANCE OF PRECIPITATION INTO MONDAY EVENING DUE TO THE TROUGH STILL
OVER THE AREA, THE GFS AND NAM TAKE THE BEST MOISTURE EAST OF THE FA
BY EARLY AFTERNOON. SLIGHT CHANCE POPS MAY BE OPTIMISTIC BUT WILL
KEEP THEM GOING. WINDS WILL INCREASE TO THE WINDY CATEGORY MONDAY
WITH GUSTS FROM 25 TO 35KTS. WIND SPEEDS COULD INCREASE TO LOW END
ADVISORY LEVELS. WINDS WILL BECOME LIGHT MONDAY NIGHT AND WITH
CLOUDS CLEARING AND DEWPOINTS IN THE LOWER 20S, WIDESPREAD FROST
WILL BE POSSIBLE OVER EASTERN COLORADO.  TEMPERATURES MAY GET COLD
ENOUGH FOR A HARD FREEZE IN EASTERN COLORADO.  FOR NOW WILL KEEP
FROST IN THE GRIDS AND MONITOR THE HARD FREEZE POTENTIAL.

SUBSIDENCE FOLLOWS THE EXITING TROUGH TUESDAY.  THIS WILL RESULT IN
DRY CONDITIONS ACROSS THE FA SO POPS WILL BE NIL.

MAX TEMPERATURES MONDAY AND TUESDAY WILL RANGE FROM THE UPPER 50S IN
EASTERN COLORADO TO THE LOWER/MID 60S IN THE EASTERN FA. MIN
TEMPERATURES WILL BE IN THE MID 40S SUNDAY NIGHT AND THEN COOL TO
THE LOWER TO MID 30S MONDAY NIGHT.

IN THE EXTENDED...(TUESDAY NIGHT THROUGH SATURDAY)...

NORTHWEST FLOW WILL CONTINUE TUESDAY NIGHT AND WEDNESDAY FOLLOWED BY
A RIDGE THAT WILL BUILD INTO THE ROCKIES THURSDAY AND INTO THE
PLAINS FRIDAY AND SATURDAY.  SUBSIDENCE WILL KEEP POPS NIL THROUGH
THIS PERIOD.

MORE SEASONABLE TEMPERATURES CAN BE EXPECTED DURING THIS PART OF THE
FORECAST WITH HIGH TEMPERATURES IN THE UPPER 60S WEDNESDAY COOLING
TO THE LOWER 60S THURSDAY THROUGH SATURDAY.  LOW TEMPERATURES
TUESDAY NIGHT SHOULD COOL TO THE MID 30S.  SOME FROST WILL BE
POSSIBLE AGAIN TUESDAY NIGHT.  MIN TEMPERATURES WILL MODERATE
SLIGHTLY TO THE MID AND UPPER 30S WEDNESDAY NIGHT THROUGH FRIDAY
NIGHT.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON)
ISSUED AT 1121 AM MDT SAT OCT 25 2014

VFR CONDITIONS WILL PERSIST AT BOTH TERMINALS THROUGH THIS
EVENING. A FEW WIND GUSTS 18-20KT WILL BE POSSIBLE AT KGLD THIS
AFTERNOON...OTHERWISE WINDS WILL REMAIN LESS THAN 12KT AT BOTH
KGLD/KMCK.

FOG IS EXPECTED TO DEVELOP OVER NORTHCENTRAL KANSAS AND SOUTHERN
NEBRASKA LATE TONIGHT (GENERALLY AFTER 08-09Z) ALONG AND NORTH OF
A STALLED FRONTAL BOUNDARY. BEST MOISTURE POOLING WILL BE NEAR
KMCK WHERE NAM/SREF/RUC CONTINUE TO SHOW DENSE FOG/LOW STRATUS
DEVELOPMENT. INITIALLY MIXING MAY KEEP VIS HIGHER AND MAINLY LOW
STRATUS...HOWEVER AS LOW LEVELS STABILIZE AND MIXING DIMINISHES I
EXPECT VIS TO DROP SIGNIFICANTLY BY SUNRISE. FOG MAY REACH AS FAR
WEST AS KGLD...HOWEVER AT THIS POINT GUIDANCE IS KEEPING VFR
CONDITIONS IN PLACE AT KGLD THROUGH THE TAF PERIOD. I INTRODUCED
LIFR GROUP BY 12Z AT KMCK BASED ON CURRENT CONFIDENCE.

GRADIENT BEGINS TO INCREASE SUNDAY AS LEE TROUGH DEEPENS WITH
GUSTY WINDS DEVELOPING AT GLD. AS THE WINDS SHIFT TO MORE OF A
WESTERLY DIRECTION LOWER TD VALUES TO ADVECT EAST WHICH COMBINED
WITH SOLAR HEATING SHOULD HELP DIMINISH FOG.


&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
CO...NONE.
NE...NONE.
&&

$$

SHORT TERM...DR
LONG TERM...FS
AVIATION...DR



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.