On March 23, light precipitation occurred over the KES site from approximately 1815 UTC to 2045 UTC, although not uninterrupted. Until 2030 UTC, the precipitation type was entirely snow, but for the final 10 to 15 minutes of the event, there was a mix of snow and rain. There were many rimed snowflakes during the event.
Temperatures increased from -0.3°C at 1715 UTC to above 3.2°C by the end of the field session at 2050 UTC. Observed relative humidity values were between 70% and 76% during the event. Cloud cover was estimated to be between 6/8 and 8/8. Visibilities were < 5 km at times, and the clouds and precipitation completely obstructed the view of the summit of Mount Kidd for > 2 h. Cloud bases lowered from 400-600 m to near the surface during the event. Winds were light throughout the event (< 2 m/s). The sea-level pressure was approximately 1007 mb.
A weather balloon was also launched at 1950 UTC. The Micro Rain Radar detected reflectivity values > 12 dBZ at a height of 1 km above the surface and the average velocity of falling snowflakes was approximately 1.2 m/s at 1820 UTC.
Ida, Juris, and Stephen performed field duties during this event.
Attached are the following imagery for March 23 (from left to right): the 00 UTC Infrared satellite image, the 12 UTC upper-air analyses, 1925 UTC surface analysis, and 1910 UTC Strathmore radar snow precipitation image.
Instruments working during that event: MRR, Parsivel, manual obs and sounding.
-Stephen Berg
Temperatures increased from -0.3°C at 1715 UTC to above 3.2°C by the end of the field session at 2050 UTC. Observed relative humidity values were between 70% and 76% during the event. Cloud cover was estimated to be between 6/8 and 8/8. Visibilities were < 5 km at times, and the clouds and precipitation completely obstructed the view of the summit of Mount Kidd for > 2 h. Cloud bases lowered from 400-600 m to near the surface during the event. Winds were light throughout the event (< 2 m/s). The sea-level pressure was approximately 1007 mb.
A weather balloon was also launched at 1950 UTC. The Micro Rain Radar detected reflectivity values > 12 dBZ at a height of 1 km above the surface and the average velocity of falling snowflakes was approximately 1.2 m/s at 1820 UTC.
Ida, Juris, and Stephen performed field duties during this event.
Attached are the following imagery for March 23 (from left to right): the 00 UTC Infrared satellite image, the 12 UTC upper-air analyses, 1925 UTC surface analysis, and 1910 UTC Strathmore radar snow precipitation image.
Instruments working during that event: MRR, Parsivel, manual obs and sounding.
-Stephen Berg
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