Monday 28th February  
Dan Johnson

1425 It has been raining since approximately 1300.  Temperatures
have been cooling and the rain is now changing to snow. 
This is very surprising since no snow was forecasted at the 1100 
briefing - only light scattered showers.  However there appears
to be much more moisture than originally anticipated. The
snow is falling heavily and is very large aggregates. These
aggregates are the largest observed so far in WISP94. 
Estimated size is 2-3 cm diameter.  The aggregates are very wet and
heavily rimed. The temperature outside is above freezing. We have
been notified by operations to take samples in the NCAR parking
lot for now.  On this mission is John Cardwell and Dan Johnson.

1435 From visual observations, snow aggregates are from 1 to 3 cm
in diameter.  The average size is now about 1.5 cm.  The coldbox
where the microscope is kept will need about 30 min. to cool
down below freezing.  Temp now is about 10 C.

1440 Snow aggregates now appear to be smaller in size.

1445 Aggregates are approximately 1 cm in diameter.

1447 Chemistry bag is set outside.

1452 Snow is now made up of mainly 1 mm graupel particles.  There
are few aggregates now.  The size of the aggregates are now 
0.5 to 1 cm in diameter.

1454 Graupel falling now is 1 to 2 mm in diameter.  The sky is
fully overcast and winds are light from the north.

1458 Chemistry samples #1a and #1b are taken.  Chemistry bag is
     ready for new samples.
     Snow is again mainly aggregates now about 1 cm in diameter.

1502 Snow is accumulating on grass and vehicles

1504 Huge aggregates are falling again.  Size of these aggregates
     are between 2 and 4 cm in diameter with 3 cm the average size.

1510 Huge aggregates falling.  Some larger than 4 cm in diameter.

1520 Chemistry samples #2a and #2b taken.  Chemistry bag ready
for new samples.
Snow falling heavily.  Still have very large aggregates that
are averaging about 3 cm in diameter.

1522 Aggregates are now smaller in size.  They are 1 to 2 cm in
diameter.

1528 Aggregates are now less than 1 cm in diameter.  Snow falling
a little more lightly.

1543 Small aggregates falling heavily now.  About 1 inch or snow
accumulation on vehicles.

1550 Snow falling is 0.5 to 1 cm aggregates, some small clumps,
and a few heavily rimed individual dendrites.  The temperature 
outside feels much cooler than at 1430.

1600 There are fewer aggregates falling now and more individual
crystals which appear to be heavily rimed. The aggregates which 
are falling are less than 0.5 cm in diameter.  
About 1/3 of snow falling now is small aggregates.

1607 About 3/4 of snow falling is 0.5 to 1 cm diameter aggregates
now. The rest is individual crystals.

1612 Chemistry samples #3a and #3b are taken.  This is the last
sample which  will be taken at NCAR.

1615 Snow is falling more lightly now.  Most of snow falling is 
     aggregates about 1 cm diameter.

1624 Larger aggregates are once again falling heavily.  The size
     of the aggregates is approximately 1 to 2 cm in diameter.

1630 Snow is falling heavier and is composed of large aggregates
     about 2 cm in diameter.

1645 We are finished at the NCAR site.  We will be going to the
     K-band site.

1710 We arrive at the K-band site at Erie.  There is no snow
falling here at this time.  We will do a filter sample.

1720 Start the filter sample.

1738 Snow has started to fall lightly now.

1740 Chemistry bag out for sample #1 at K-band.

1800 Snow falling extremely lightly now.

1804 It is getting dark outside.  The snow has almost stopped falling
     now.  Snow type is 1-2 mm very heavily rimed chunks of ice, 
     possibly very small graupel.  Also have very heavily rimed 
     dendrites and stellars.  It is hard to sample these crystals
     since they melt easily.  The temperature outside is +4 C.

1824 Snow is falling extremely lightly still.  The operations
center, however, has told us that a 30 DBZ band is coming from the NW.

1826 Filter sample is finished.

1833 Snow is falling a little more heavily now.  Seeing some
aggregates 0.5 - 1 cm in diameter and heavily rimed crystals.

1850 Snow coming down moderately.  Have 1-1.5 cm dendrites.

1905 Chemistry samples #4a and #4b taken.  (1st sample at K-band)

1910 We are finished at the K-band site.  The snow is still
falling moderately and consists of large aggregates.  
Snow is very wet.