Saturday 8th February Dan Johnson 0930 Leave RAP operations center. 1041 ARRIVE AT FIRST DESTINATION. This is 21.5 km from the CHILL radar site at 165 degrees or .5 km south of the intersection of 36Rd. and 53 Rd. Winds are ENE at this time and very light. Snowfall is also very light and is made up of dendritic crystals there are no aggregates. 1045 Chemistry bag is set up for sample #1. 1100 Trying to set up the air filter samples. This was unsuccessful at this site and at the next site (at K-band). There were filter samples taken at the last site (near Ft. Collins). 1110 Oil slide #1 is set outside (New Skin was used on the slides today) 1114 Oil slide #1 completed 1116 Snow sample #1 taken. Winds are about 5 mph from the east. Snowfall is very light: Dendrites, heavily rimed, about 2mm diameter Isolated plates plates 1130 Snow sample #2 taken. Winds from the east about 5 mph, snowfall is very light and mainly smaller crystals now: Plates, assemblage of plates, side planes 1135 Wind has changed to a more northerly direction and is > 5 mph now. 1137 Oil Slide #2 is set outside 1139 Snow sample #3. Winds are NNE and stronger now than earlier, about 10-15 mph. Snowfall is falling lightly but a bit heavier than earlier: Small plates, side planes Dendrites Rimed side planes Short column 1142 Oil Slide #2 is completed 1147 Snow sample #4: Assemblage of plates and side planes 1156 Snow sample #5, winds are from the NE at about 15 mph, snowfall is very light: Very heavily rimed stellars Freezing drizzle? 1204 Chemistry sample #1a taken 1208 Chemistry sample #1b taken 1215 Snow has stopped falling. 1245 Snow still now falling. Pack up and leave site 21.5 km SSE Greeley. We are heading to the K-band site. If it snows there, they will do vertical scans with the K-band in conjunction with our microphysics observations. 1330 ARRIVE AT DESTINATION #2, the K-band site. It is not snowing at this time so we check with K-band operators on status. Lat. Long. of this site is 40 degrees, 5', 57", and 105 degrees, 2', 9". 1350 A band of snow and graupel is heading from RAP towards the K-band site. We set up to take samples here. 1356 Chemistry bag is out. Graupel is beginning to fall from a convective band. The graupel particles are about 2 mm in diameter 1400 Oil Slide #1 is set outside 1401 Snow sample #1, winds east and light breeze: Graupel approximately 2mm in diameter Graupel particles Plates 1402 Oil Slide #1 completed 1404 Graupel particles are larger. Approximately 4mm in diameter 1407 Oil Slide #2 set outside 1408 Snow sample #2: Graupel particles 4mm in diameter 1410 Oil Slide #2 completed 1414 Snow sample #3: Graupel particles Graupel particles approximately 4 mm diameter Small Graupel particles Plates 1420 Chemistry samples taken (two of them) 1420 Snow sample #4: Graupel 2 mm diameter Graupel < 2mm diameter Stellar with plates on end 1420 Oil Slide #3 1430 Snow/graupel has stopped falling. We are on standby for another possible approaching Graupel band. 1500 No snow has fallen for past 30 min. Chemistry bag is set up for possible snow band. 1515 Still no snow. We are instructed to move on to Ft. Collins for snow bands developing there. This is the end of the K-band site. 1554 Near Ft. Collins/Loveland Municipal airport on Int. 25, snow starts to fall heavily. 1600 We are instructed to set up ASAP. 1606 ARRIVE AT DESTINATION #3. We are located on 3F Rd. about .5 km SSE of Hwy 68, about 1.5 km east of Int. 25. This location is 9.5 km SE of downtown Ft. Collins or 30.5 km at 290 degrees from CHILL. The lat. and long. for this position is 40 deg., 31', 2", and 104 deg., 58', 36" respectively. 1608 Chemistry bag set up 1611 Oil Slide #21 set outside 1614 Winds from the east and gusty. Snow is falling lightly, Snow sample #1: Sector plate with branches lightly rimed Fragments of sector plates and dendrites 1617 Oil Slide #21 completed 1620 Filter sample #1 begins 1626 Black board showing small aggregates and beautiful stellar about .5 mm diameter. Snow sample #2: Rimed particle Fragments 1630 Band of light snow over us has ended and sky is brighter. 1653 Some aggregates are beginning to fall with second band 1655 Very large aggregates of dendrites falling 1658 Filter sample #1 completed 1658 Filter sample #2 begins 1700 Snow sample #3: Heavily rimed aggregates Heavily rimed sector plates Heavily rimed dendrites 1705 Winds are NE and breezy. Snow falling heavily. Snow sample #4: Rimed aggregates of dendrites Rimed dendrites Branches of dendrites 1712 Snow sample #5: Dendritic branch heavily rimed about 2mm in length 1715 Small aggregates and crystals falling. Snow is falling more slowly now 1717 Sky is getting brighter and snow is falling lightly now. 1724 Many small crystals falling now 1725 Snow sample #6 Dendrites 1726 Very small aggregates falling 1730 Chemistry samples #21a and #21b taken 1734 Filter sample #2 completed 1735 Snow has stopped falling 1748 Snow has started to fall again heavily Snow sample #7: Rimed chunk Rimed aggregates and a branch Heavily rimed dendritic aggregates 1755 Snow falling very heavily. Snow sample #8: Stellar aggregates rimed Stellars Fragments Capped hollow column Aggregate chunk Small aggregate 1803 Chemistry sample #22a taken 1805 Chemistry sample #22b taken 1810 End of Ft. Collins site. We are heading back to RAP Aggregates falling heavily still. 1900 Snow fell all the way back to Longmont.