610
FXUS65 KCYS 192002
AFDCYS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
200 PM MDT FRI OCT 19 2018
SHORT TERM
(THIS EVENING THROUGH MONDAY)
ISSUED AT 200 PM MDT FRI OCT 19 2018
THE AFTERNOON WATER VAPOR LOOP SHOWED A UPPER HIGH OVER WA/OR AND
UPPER TROUGH AXIS FROM MN THROUGH THE CENTRAL PLAINS/ROCKIES TO A
LOW OFF NORTHERN BAJA CA. A WEAK FRONT WAS PROGRESSING SOUTH ACROSS
THE HIGH PLAINS, ACCOMPANIED BY GUSTY NORTHERLY WINDS TO 30 MPH.
SKIES WERE SUNNY AND TEMPERATURES WERE IN THE MID 50S TO MID 60S.
MODELS HAVE BEEN CONSISTENT THE PAST FEW DAYS WITH DRY AND WARM
WEATHER UNDER A HIGH PRESSURE RIDGE THIS WEEKEND. WINDS WILL BE
LIGHT SOUTHERLY SATURDAY, SHIFTING TO WESTERLY AND BECOMING BREEZY
SUNDAY AHEAD OF AN APPROACHING COLD FRONT FROM THE NORTH. 700MB
TEMPERATURES WILL WARM TO 4 TO 6 DEGREES CELSIUS, WITH HIGHS IN
THE 60S SATURDAY AND MID 60S TO MID 70S SUNDAY. THE COLD FRONT
MOVES SOUTH ACROSS THE HIGH PLAINS SUNDAY NIGHT, WITH WINDS
SHIFTING TO EASTERLY. SOME LOW/MID LEVEL MOISTURE WILL RESULT IN
SLIGHT CHANCES FOR SHOWERS OVER THE SNOWY/SIERRA MADRE MOUNTAINS
MONDAY. HIGH TEMPERATURES MONDAY WILL COOL INTO THE LOW TO MID 60S,
STILL ABOUT 5 DEGREES ABOVE SEASONAL NORMALS.
LONG TERM
(MONDAY NIGHT THROUGH FRIDAY)
ISSUED AT 200 PM MDT FRI OCT 19 2018
A RATHER BROAD UPPER TROUGH WILL APPROACH THE REGION MONDAY AND
TUESDAY THEN ACROSS THE AREA WEDS. IT WILL BRING COOLER AND A BIT
UNSETTLED WEATHER OVER THE CWA, ALTHOUGH TEMPERATURES WILL BE BE
MILD, CLOSE TO SEASONAL AVERAGES. MOST OF THE RAIN/SNOW ASSOCIATED
WITH THIS SYSTEM WILL FALL OVER THE MTNS THOUGH OVERALL AMOUNTS
SHOULD BE LIGHT. MAINLY DRY AND MILD WEATHER SHOULD RETURN FOR
THURSDAY AND FRIDAY AHEAD OF A STRONGER COLD FRONT THAT IS PROGGED
TO PASS ACROSS LATE IN THE DAY FRIDAY.
AVIATION
(FOR THE 18Z TAFS THROUGH 18Z SATURDAY MORNING)
VFR CONDITIONS WILL CONTINUE OVER ALL TERMINALS THROUGH THE PERIOD.
BREEZY NORTHERLY WINDS WILL EXIST OVER THE EASTERN PLAINS THIS
AFTERNOON WITH GUSTS AROUND 25 KNOTS. LIGHT WINDS BY MID-EVENING.
FIRE WEATHER
ISSUED AT 135 PM MDT FRI OCT 19 2018
DESPITE THE DRY AND WARM WEATHER THIS WEEKEND, MINIMUM HUMIDITIES
AND WINDS WILL BE NON-CRITICAL. ABOVE NORMAL TEMPERATURES WILL
CONTINUE NEXT WEEK WITH SLIGHT CHANCES FOR SHOWERS.
CYS WATCHES/WARNINGS/ADVISORIES
WY...NONE.
NE...NONE.
SHORT TERM...MAJ
LONG TERM...RE
AVIATION...RE
FIRE WEATHER...MAJ
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