658
FPUS85 KBOU 172027
OPUBOU

DEVELOPMENTAL PROBABILISTIC SNOW ACCUMULATION FORECAST (DIA)
NATIONAL WEATHER SERVICE DENVER/BOULDER, COLORADO
1423 MDT THURSDAY, APRIL 17, 2025

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THIS DEVELOPMENTAL PRODUCT CONTAINS THE PROBABILITIES (%) THAT THE
GIVEN SNOW AMOUNTS (INCHES) WILL OCCUR AT DENVER INTERNATIONAL
AIRPORT DURING THE RESPECTIVE 3 HOUR OR 12 HOUR PERIODS.  THE
PROBABILITIES INDICATE THE AMOUNT OF SNOW THAT IS EXPECTED TO
ACCUMULATE ON RUNWAYS AND OTHER CONCRETE SURFACES AT DIA.
[T (TRACE) MEANS MORE THAN ZERO.]
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DISCUSSION (17/15-18/18 MDT): RAIN SHOWERS WILL DEVELOP THIS EVENING
AFTER 9PM FOLLOWING A COLD FRONT, WITH A RAIN/SNOW MIX OR EVEN BRIEF
FREEZING RAIN POSSIBLE BETWEEN 10PM AND 1AM TONIGHT. PAST MIDNIGHT,
PRECIPITATION SHOULD TRANSITION TO SNOW, WITH GENERALLY LIGHT TO
MODERATE INTENSITY AND SNOWFALL RATES 0.5"/HR OR LESS. FAIRLY STEADY
SNOW WILL CONTINUE THROUGH THE DAY FRIDAY, AND TAPER OFF BY SATURDAY
MORNING. AIR AND PAVEMENT TEMPERATURES ARE LIKELY TO BE MARGINAL FOR
MOST OF THE DAY FRIDAY, WITH ANY ACCUMULATIONS BEING PRIMARILY
CONFINED TO GRASSY AND COLDER SURFACES. SNOW ACCUMULATION ON RUNWAYS
AND TAXIWAYS WILL BECOME MORE LIKELY AFTER 6PM FRIDAY AS
TEMPERATURES DROP TO OR BELOW FREEZING. TOTAL ACCUMULATIONS ON
RUNWAYS/TAXIWAYS OF 1 TO 3" EXPECTED THROUGH SATURDAY, OCCURRING
MAINLY FRIDAY EVENING AND NIGHT. TOTAL ACCUMULATIONS ON COLDER
SURFACES MAY BE CLOSER TO 2 TO 5" THROUGH SATURDAY.

                   0"    T OR   1" OR   3" OR   10" OR
DAY/HOUR MDT             MORE    MORE    MORE     MORE
            --------------------------------------------------
17/15-17/18 |     100       0       0       0
17/18-17/21 |     100       0       0       0
17/21-18/00 |      85      15       0       0
18/00-18/03 |      25      75      20       0
18/03-18/06 |      20      80      20       0
17/18-18/06 |                                        0
18/06-18/09 |      20      80      15       0
18/09-18/12 |      20      80      15       0
18/12-18/15 |      20      80      20       0
18/15-18/18 |      20      80      25       0
18/06-18/18 |                                        0

                   0"    T OR   1" OR   3" OR   10" OR
DAY/HOUR MDT             MORE    MORE    MORE     MORE
            --------------------------------------------------
18/18-18/21 |      20      80      50       0
18/21-19/00 |      20      80      60       0
19/00-19/03 |      50      50       0       0
19/03-19/06 |      80      20       0       0
18/18-19/06 |                                        0
19/06-19/09 |      95       5       0       0
19/09-19/12 |     100       0       0       0
19/12-19/15 |     100       0       0       0
19/15-19/18 |     100       0       0       0
19/06-19/18 |                                        0