206
FXUS63 KGLD 072055
AFDGLD
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
255 PM MDT TUE JUL 7 2020
SHORT TERM
(THIS EVENING THROUGH FRIDAY)
ISSUED AT 240 PM MDT TUE JUL 7 2020
TONIGHT...A WEATHER DISTURBANCE PER 700-500MB RELATIVE HUMIDITY
REACHES OUR FAR EASTERN COLORADO COUNTIES THIS AFTERNOON THROUGH
EARLY EVENING POSSIBLY CROSSING INTO ADJACENT COUNTIES IN NORTHWEST
KANSAS AND SOUTHWEST NEBRASKA SHORTLY AFTER DARK. THE PRIMARY
HAZARDS FROM ANY THUNDERSTORM WILL BE WIND GUSTS TO 65 MPH AND CLOUD
TO GROUND LIGHTNING THAT MAY SPARK GRASS FIRES. LINGERING CLOUDS
WITH THIS FEATURE CONTINUE MOVING EAST ACROSS THE REMAINDER OF THE
AREA AFTER MIDNIGHT. LOW TEMPERATURES ARE EXPECTED RANGE FROM THE
UPPER 50S TO LOW 60S IN FAR EASTERN COLORADO AND MID 60S TO LOW 70S
EAST OF THE CO/KS BORDER.
WEDNESDAY-WEDNESDAY NIGHT...INSTABILITY INCREASES ACROSS THE EASTERN
1/4 OF THE FORECAST AREA AHEAD OF AN APPROACHING SURFACE TROUGH.
STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE FROM MID AFTERNOON
THROUGH EARLY EVENING WITH PRECIPITATION CHANCES ENDING AROUND OR
SHORTLY AFTER MIDNIGHT. HIGH TEMPERATURES ARE EXPECTED TO BE IN THE
MID 90S TO AROUND 102. HEAT INDICES OF 100 TO 105 ARE EXPECTED
ALONG AND EAST OF A LINE FROM BENKELMAN TO COLBY AND GOVE. IF
TRENDS CONTINUE A HEAT ADVISORY WILL BE NEEDED FOR NORTON AND
GRAHAM COUNTIES. LOW TEMPERATURES ARE EXPECTED TO FALL INTO THE
UPPER 50S TO LOW 60S IN FAR EASTERN COLORADO, LOW TO UPPER 60S
ELSEWHERE. AN ITEM OF INTEREST WILL BE A POTENTIAL MCS MOVING
SOUTHEAST THROUGH CENTRAL NEBRASKA INTO CENTRAL KANSAS. STRONG
EASTERLY OUTFLOW WINDS FROM THIS SYSTEM ARE LIKELY TO IMPACT MUCH
OF OUR AREA.
THURSDAY-THURSDAY NIGHT...I'M NOT TERRIBLY EXCITED ABOUT
PRECIPITATION CHANCES DURING THE PERIOD. THE NAM MAY HAVE THE RIGHT
IDEA WITH REGARDS TO WEDNESDAY NIGHTS MCS AND POTENTIAL IMPACT ON
OUR AREA OF GENERAL SUBSIDENCE ACROSS THE AREA. THE GFS AND ECMWF
ARE SHOWING A BIT BETTER MOISTURE PROFILE MOVING INTO THE AREA FROM
THE WEST DURING THE TIME OF PEAK HEATING IN THE AFTERNOON AND
EVENING. GIVEN SOME DISAGREEMENT ON POTENTIAL IMPACTS WILL NOT
CHANGE CURRENT FORECAST. THE HIGH TEMPERATURE FORECAST WILL ALSO
DEPEND ON IF THE WEDNESDAY NIGHT/EARLY THURSDAY MORNING MCS COOLER
OUTFLOW LINGERS LONGER THEN THE MODELS ARE SHOWING. NAM IS THE
COOLEST WITH HIGH TEMPERATURES IN THE LOW TO MID 80S WHILE THE NBM
IS IN THE LOW TO MID 90S. TWEAKED HIGHS DOWN JUST A TAD BUT STILL IN
THE LOW TO MID 90S. LOWS ARE EXPECTED TO BE IN THE LOW TO MID 60S.
FRIDAY...THE FORECAST AREA IS UNDER NORTHWEST FLOW ALOFT WITH A NEAR
600DAM UPPER HIGH OVER CENTRAL NEW MEXICO. CANT COMPLETELY RULE OUT
A FEW HIGH BASED STORMS OVER THE AREA IN THE AFTERNOON BUT FOR NOW
WILL KEEP THINGS DRY.
LONG TERM
(FRIDAY NIGHT THROUGH TUESDAY)
ISSUED AT 253 PM MDT TUE JUL 7 2020
THE RIDGE WILL CONTINUE TO BUILD NORTH WITH THE AREA OF HIGH
PRESSURE CENTERED OVER NEW MEXICO AND WESTERN PORTIONS OF TEXAS
FRIDAY NIGHT. OVER THE EXTENDED PERIOD, THE MODELS SEEM IN AGREEMENT
THAT THE UPPER LEVEL HIGH WILL REMAIN STATIONARY IN THE SOUTHWEST.
STARTING LATE MONDAY, AN UPPER LEVEL LOW WILL MOVE ACROSS CENTRAL
CANADA, SUPPRESSING THE AMPLITUDE OF THE RIDGE AND GENERATING
WESTERLY ZONAL FLOW ALOFT OVER THE AND NORTH OF THE CENTRAL PLAINS
REGION THROUGH TUESDAY.
DUE TO THE PATTERN WE ARE IN, MUCH OF THE EXTENDED PERIOD WILL BE
HOT AND DRY WITH A POSSIBLE EXCEPTION SATURDAY AFTERNOON AS A
SHORTWAVE TROUGH MOVES ACROSS THE REGION. SURFACE LEVEL WINDS WILL
GENERALLY BE FROM THE SOUTH FRIDAY NIGHT INTO SATURDAY MORNING
BEFORE THE WINDS SHIFT WITH THE SHORTWAVE TROUGH TOWARDS THE
NORTHEAST THEN EAST. THE SHORTWAVE TROUGH WILL MOVE EAST ACROSS
CENTRAL NEBRASKA PROVIDING SOME FORCING FOR POTENTIAL THUNDERSTORMS
TO OCCUR IN THE AFTERNOON AND EVENING. THE MODELS SEEM IN
DISAGREEMENT OVER HOW FAR WEST THE STORMS WILL OCCUR. IF ANY STORMS
DO MAKE IT TO THE TRI-STATE AREA, THE BEST CHANCE FOR PRECIPITATION
WOULD BE IN THE FAR EASTERN COUNTIES OF THE CWA. HOWEVER, THE POPS
ARE BEING KEPT LOW FOR NOW AS THE LOW TO MID LEVEL MOISTURE IS NOT
VERY SUPPORTIVE OF PRECIPITATION OCCURRING BEYOND THE EASTERN
EDGE OF THE CWA.
THE REMAINDER OF THE EXTENDED PERIOD WILL RESUME HOT AND DRY
CONDITIONS ASSOCIATED WITH THE RIDGE. AFTER THE PASSAGE OF THE
SHORTWAVE SATURDAY EVENING, THE WINDS WILL SHIFT BACK TOWARDS THE
SOUTH THROUGH TUESDAY MORNING WHEN THE WINDS SHIFT TO THE WEST. HIGH
TEMPERATURES ACROSS THE TRI-STATE AREA WILL BE IN THE MID TO UPPER
90S WITH SOME LOCATIONS REACHING THE LOW 100S ON SATURDAY, MONDAY,
AND TUESDAY. LOWS EACH DAY OF THE EXTENDED WILL BE IN THE 60S TO LOW
70S. DUE TO THE HOT AND DRY CONDITIONS, FIRE WEATHER CONDITIONS ARE
POSSIBLE FOR THE WESTERN PORTION OF THE TRI-STATE AREA, ESPECIALLY
ALONG AND WEST OF THE COLORADO STATE LINE. MODEL GUIDANCE INDICATES
RELATIVE HUMIDITY VALUES DROPPING NEAR AND BELOW 20% WEST OF HIGHWAY
27 THROUGH THE PERIOD. FORECASTED WIND GUSTS ARE CURRENTLY EXPECTED
TO REMAIN BELOW THE ELEVATED FIRE WEATHER CRITERIA OF 25 KTS.
SATURDAY AFTERNOON, THE WINDS COULD GUST CLOSE TO THE 25 KTS
THRESHOLD FOR EASTERN PORTIONS OF KIT CARSON AND CHEYENNE COUNTIES
IN COLORADO.
AVIATION
(FOR THE 18Z TAFS THROUGH 18Z WEDNESDAY AFTERNOON)
ISSUED AT 1050 AM MDT TUE JUL 7 2020
FOR KGLD, VFR CONDITIONS EXPECTED THROUGH THE PERIOD. SOUTH WINDS
GUSTING TO 35KTS ARE EXPECTED FROM TAF ISSUANCE THROUGH 00Z
TONIGHT THEN HOVERING IN THE 10-13KT RANGE TONIGHT. FOR WEDNESDAY
SOUTH-SOUTHWEST WINDS NEAR 13KTS WITH SOME HIGHER GUSTS EXPECTED
IN THE MORNING THEN FALLING TO AROUND 6KTS OR SO BY THE END OF THE
PERIOD. CURRENTLY AM EXPECTING SHOWERS/THUNDERSTORMS TO POSSIBLY
BE NEAR OR OVER THE TERMINAL AROUND 03Z OR SO PLUS OR MINUS AN
HOUR OR TWO, WILL HAVE TO WATCH CONVECTION IN FAR EASTERN COLORADO
AND SEE IF IT SURVIVES WHILE MOVING EAST OF THE CO/KS BORDER. FOR
NOW HAVE NO MENTION OF PRECIPITATION IN THE FORECAST.
FOR KMCK, VFR CONDITIONS EXPECTED THROUGH THE PERIOD. SOUTH-
SOUTHEAST WINDS GUSTING AROUND 30KTS EXPECTED FROM TAF ISSUANCE
THROUGH 00Z TONIGHT THEN HOVERING AROUND 10KTS TIL SUNRISE WHEN
WINDS SUBSIDE TO AROUND 5KTS. FOR WEDNESDAY SOUTH WINDS AROUND
11KTS EXPECTED.
GLD WATCHES/WARNINGS/ADVISORIES
KS...NONE.
CO...RED FLAG WARNING UNTIL 8 PM MDT THIS EVENING FOR COZ252>254.
NE...NONE.
SHORT TERM...99
LONG TERM...KMK
AVIATION...99
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