Rain to Virga Storm Summary of 2007-2008 Winter Season (November - March) - 5 Storms

Portland International Airport Weather Station, Oregon (45°35'N , 122°36'W / Elevation: 5.8 m)

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Storm Summary of 2006-2007 Winter Season (November - March)

Storm Summary of 2007-2008 Winter Season (November - March)

Storm Summary of 2008-2009 Winter Season (December - March)

Storm Summary of 2010-2011 Winter Season (November - March)

* = general trend 6 hours before storm
Tall (> 4.0 km AGL)   Continuity for Storm Maturity
Borderline ( 2.5-4.0 km AGL)   Scattered: Several Breaks
Shallow (< 2.5 km AGL)  
Storm Summary
Rain
Virga to Rain
Rain to Virga
Freezing Rain/Rain
Virga to Rain to Virga
Rain to Virga to Rain
Virga
Unknown
Continuity
Continuous
Scattered
Average
All
Page
Temp. (°C)
6.61
7.66
RH (%)
84.5
72.0
Wind Direction
184°
183°
Wind Speed (m/s)
7.6
6.0
Pressure (hPa)
1019
1016
Precipitation (in)
0.56
0.02
Total Precipitation (in.)
0.08
AGL
Tall
Tall to Borderline
Tall to Borderline to Tall
Tall to Shallow to Borderline / Tall
Tall to Shallow
Borderline
Borderline to Shallow
Borderline to Tall
Borderline to Tall to Shallow/Borderline
Shallow
Shallow to Tall/Borderline
Shallow to Tall/ Borderline to Shallow
Shallow to Tall to Borderline
Avg. Duration (hrs)
7.10
Trends
Wind Direction
Temperature
RH
Pressure
Year
Month
Day
AGL
Continuity
Start Time (UTC)
Duration (hrs)
Avg. Temp. (°C)
Avg.
At Storm Maturity
Wind Speed (m/s)
Precip. (in)
before*
during
before*
during
before*
during
2007
11
11
Borderline to Shallow
Scattered
09:00
3
7.4
S
S
10.0
0.02
increasing
up - down
decreasing
flat
increasing
increasing
2008
02
03
Shallow to Borderline
Scattered
18:30
10.5
4.9
SW
SW
1.9
none
increasing
decreasing
decreasing
increasing
increasing
increasing
2008
02
24
Tall to Borderline
Continuous
05:00
10
8.6
SE
SE
9.1
0.06
increasing
increasing
flat
increasing
decreasing
increasing
2008
02
27
Tall
Scattered
12:00
5
7.6
SE
E
4.3
none
down - up
down - up
down - up
up - down
decreasing
increasing
2008
03
24
Shallow to Borderline
Scattered
19:30
7
9.8
NW
NW
4.6
none
increasing
increasing
decreasing
down - up
up - down
decreasing

Version 2, 11 July 2013

web page credits: Micheal Tai Bryant, Sandra Yuter

This research is a collaboration by the
Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University

This material is based upon work supported by the National Science Foundation under Grant No. 0544766. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF).

contacts:
Dr. Sandra Yuter seyuter@ncsu.edu