070 NZUS99 KBOU 272203 OPUBOU Developmental Probabilistic Snow Accumulation Forecast National Weather Service Denver/Boulder, Colorado 1503 MST Thursday, December 27, 2018 -------------------------------------------------------------------------------- This developmental product contains the probabilities (%) that the given snow amounts (inches) will occur at Denver International Airport during the respec- tive 6- or 12-hour periods. The probabilities indicate the amount of snow that will fall from the clouds. They do not consider the amount of melting that may or may not occur on various ground surfaces. [T (trace) means more than zero.] -------------------------------------------------------------------------------- Short Term Discussion (28/00Z-29/00Z): There is a small chance that light flurries will be possible Friday morning and afternoon, however, most of the snow is expected to stay south and west of dia. With the cold temperatures overnight and through Friday, even light snow could slightly accumulate on paved surface depending on sfc temps. If this is possible, accumulations will be under half an inch. 0" T or 1" or 3" or 6" or 10" or Day/Hour GMT more more more more more -------------------------------------------------- 28/00-28/06 | 100 0 0 0 28/06-28/12 | 90 10 0 0 28/00-28/12 | 0 0 28/12-28/18 | 90 10 0 0 28/18-29/00 | 100 0 0 0 28/12-29/00 | 0 0 Long Term Discussion (29/00Z-30/00Z): There is a slight chance of light snow showers Friday evening until about 10 PM. If it does snow, the accumulation will be less than half an inch. 0" T or 1" or 3" or 6" or 10" or Day/Hour GMT more more more more more -------------------------------------------------- 29/00-29/06 | 80 20 0 0 29/06-29/12 | 100 0 0 0 29/00-29/12 | 0 0 29/12-29/18 | 100 0 0 0 29/18-30/00 | 100 0 0 0 29/12-30/00 | 0 0 Deterministic Forecast for Denver International Airport created at 0736 MST Thursday, December 27, 2018 Valid at Sky PoP CWR T Td AT RH Wind(mph) QPF Snow Tx RHn Tn RHx MM/DD:UT % % % F F F % Dir Sp Gs inch inch F % F % ================================================================================ 12/27:12 39 5 1 18 15 3 88 N 15 22 ---- ---- 12/27:13 39 5 1 17 15 2 92 N 15 21 | | 12/27:14 39 5 1 15 9 3 79 NNW 8 8 | | 15 89 12/27:15 33 5 1 15 10 3 79 NNW 9 10 0.00 0.0 12/27:16 26 5 1 18 11 5 76 NNW 12 15 | | 12/27:17 30 4 1 21 12 7 69 N 15 21 | | 12/27:18 33 5 1 24 13 11 62 N 17 24 ---- ---- 12/27:19 33 3 1 27 13 14 55 N 18 26 | | 12/27:20 33 1 0 28 12 15 50 N 20 28 | | 12/27:21 33 0 0 27 11 14 49 N 20 26 0.00 0.0 12/27:22 36 2 0 25 10 12 52 N 17 25 | | 12/27:23 39 3 1 22 9 9 57 N 15 21 | | 28 49 12/28:00 42 5 1 19 9 6 65 N 13 18 ---- ---- 12/28:01 55 5 1 16 10 2 76 N 12 17 | | 12/28:02 63 5 1 14 10 0 87 N 12 14 | | 12/28:03 67 5 1 12 11 -1 95 N 12 14 0.00 0.0 12/28:04 68 5 1 12 11 -2 95 N 10 10 | | 12/28:05 72 5 1 11 10 -1 93 N 9 9 | | 12/28:06 73 13 3 11 9 -1 92 N 8 8 ---- ---- 12/28:07 76 13 3 10 9 -2 95 N 8 8 | | 12/28:08 81 13 3 9 9 -3 99 N 8 8 | | 12/28:09 84 13 3 8 8 -4 100 N 8 8 0.00 0.0 12/28:10 84 13 3 8 8 -4 99 N 8 8 | | 12/28:11 83 13 3 8 8 -3 98 N 7 7 | | 12/28:12 80 14 3 8 8 -2 98 N 7 7 ---- ---- 12/28:13 82 14 3 8 8 -2 100 N 6 6 | | 12/28:14 84 14 3 7 7 -2 100 NNE 6 6 | | 7 100 12/28:15 85 14 3 8 8 -1 100 NNE 5 5 0.00 0.0 12/28:16 85 14 3 9 9 1 100 NNE 5 5 | | 12/28:17 84 14 3 11 9 3 94 NNE 5 5 | | 12/28:18 83 10 2 13 9 6 82 NNE 5 5 ---- ---- 12/28:19 81 10 2 17 9 9 71 NE 5 5 | | 12/28:20 78 10 2 20 9 12 63 ENE 6 6 | | 12/28:21 76 10 2 21 9 13 60 ENE 6 6 0.00 0.0 12/28:22 77 10 2 20 9 12 60 ENE 6 6 | | 12/28:23 78 10 1 19 8 11 62 ENE 6 6 | | 21 59 12/29:00 73 11 1 17 8 8 68 E 6 7 ---- ---- 12/29:01 76 11 1 14 8 5 76 E 6 7 | | 12/29:02 81 11 1 12 9 3 87 ESE 6 7 | | 12/29:03 83 11 1 11 9 2 92 ESE 6 7 0.00 0.0 12/29:04 80 11 1 11 9 1 93 SE 6 7 | | 12/29:05 74 11 1 11 9 2 91 SE 6 8 | | 12/29:06 70 4 1 11 9 2 91 SE 6 8 ---- ---- 12/29:07 68 4 1 10 9 0 95 SSE 6 7 | | 12/29:08 64 4 1 9 9 -1 98 SSE 6 7 | | 12/29:09 62 4 1 8 8 -2 100 S 6 6 0.00 0.0 12/29:10 59 4 1 8 8 -2 99 S 6 6 | | 12/29:11 53 4 1 9 8 0 96 SSW 5 5 | | 12/29:12 50 0 0 9 7 0 93 SW 5 5 ---- ---- ________________________________________________________________________________ Sky= Amount of sky covered by opaque clouds (percent) PoP= Probability of receiving .01 inch or more liquid (melted, if frozen) precip CWR= Probability of receiving .10 inch or more liquid (melted, if frozen) precip T = Air temperature (degrees Fahrenheit) Td = Dew point temperature (degrees Fahrenheit) AT = Apparent temperature (wind chill or heat index; degrees Fahrenheit) RH = Relative humidity (percent) Dir= Compass direction from which the wind is blowing (e.g. NE= northeast) Sp = Wind speed (miles per hour) Gs = Wind gust speed (miles per hour) QPF= Liquid precip amount (inches) expected thru the 6-hour period between ---- Snow= Snow amount (inches) expected during the 6-hour period between --- Tx = Maximum temperature (F) during the period ending at the given hour RHn= Minimum relative humidity (%) during the period ending at the given hour Tn = Minimum temperature (F) during the period ending at the given hour RHx= Maximum relative humidity (%) during the period ending at the given hour