Virga to Rain Storm Summary of 2005-2006 Winter Season (November - March) - 17 Storms

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

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Storm Summary of 2005-2006 Winter Season (November - March)

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
Rain/Snow
Virga to Rain to Virga
Rain to Virga to Rain
Virga
Continuity
Continuous
Scattered
Average
All
Page
Temp. (°C)
7.38
7.85
RH (%)
80.0
78.1
Wind Direction
161°
167°
Wind Speed (m/s)
9.9
10.9
Pressure (hPa)
1014
1012
Precipitation (in)
0.70
0.61
AGL
Tall
Tall to Borderline
Tall to Shallow
Borderline
Borderline to Shallow
Borderline to Tall
Borderline to Tall to Borderline
Shallow
Shallow to Borderline to Shallow
Shallow to Tall to Borderline
Total Precipitation (in.)
9.71
Avg. Duration (hrs)
29.17
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
2005
11
24
Tall to Borderline
Scattered
19:00
46
5.1
S
SE
7.3
1.39
increasing
up - down
decreasing
up - down
decreasing
down - up
2005
11
28
Borderline to Tall
Scattered
19:00
29
4.9
S
S
15.6
0.34
increasing
down - up
decreasing
increasing
decreasing
down - up
2005
12
01
Tall to Shallow
Scattered
08:00
72
4.4
S
S
10.8
1.43
decreasing
down - up
increasing
flat
decreasing
increasing
2005
12
23
Tall
Scattered
16:30
9.5
8.6
SE
SE
10.7
0.05
decreasing
increasing
up - down
down - up
increasing
decreasing
2005
12
28
Tall to Shallow
Scattered
02:30
36.5
8.6
SE
SE
11.5
1.79
decreasing
up - down
flat
down - up
decreasing
down - up
2006
01
03
Borderline to Shallow
Continuous
16:30
11.5
6.6
SE
SE
13.1
0.36
increasing
increasing
decreasing
increasing
decreasing
increasing
2006
01
16
Tall
Scattered
06:30
41.5
7.0
SE
SE
12.3
1.66
decreasing
up - down
down - up
down - up
flat
decreasing
2006
01
21
Shallow to Borderline
Scattered
13:30
11
7.5
S
S
7.1
0.06
flat
increasing
increasing
flat
increasing
increasing
2006
01
31
Tall to Shallow
Continuous
18:00
12
7.0
S
SE
16.8
0.60
flat
down - up
decreasing
increasing
decreasing
decreasing
2006
02
21
Shallow
Scattered
00:00
40
4.3
SW
NE
2.4
0.08
increasing
increasing
down - up
increasing
decreasing
down - up
2006
02
26
Tall to Borderline
Scattered
17:30
87
6.8
S
SW
7.8
1.21
decreasing
down - up
decreasing
increasing
decreasing
down - up
2006
03
02
Tall to Borderline
Scattered
03:00
17
9.3
SE
E
18.2
none
flat
decreasing
flat
increasing
decreasing
increasing
2006
03
04
Borderline to Shallow
Scattered
00:00
12
8.6
S
S
13.0
0.01
up - down
decreasing
down - up
increasing
down - up
increasing
2006
03
06
Borderline to Tall
Scattered
07:30
42
8.6
S
SW
10.6
0.23
decreasing
up - down
increasing
increasing
decreasing
increasing
2006
03
13
Borderline
Scattered
22:30
7
8.9
SE
SE
15.3
0.01
increasing
decreasing
decreasing
increasing
decreasing
decreasing
2006
03
23
Tall to Shallow
Scattered
18:00
36
11.4
S
SE
10.5
0.28
increasing
decreasing
decreasing
increasing
decreasing
down - up
2006
03
25
Borderline to Tall to Borderline
Scattered
18:00
8
8.3
W
SW
6.7
0.21
flat
up - down
up - down
flat
decreasing
increasing
2006
03
29
Tall to Shallow
Scattered
00:00
7
15.4
SE
NW
6.8
none
increasing
decreasing
decreasing
increasing
decreasing
down - up

Version 1, 14 August 2012

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