Storm Summary with Tall to Borderline Vertical Profile (AGL) of the 2007-2008 Winter Season (November - March) - 14 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)

Grey highlighted rows: Virga or mix of virga and rain, no snow

* = 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
6.72
RH (%)
84.5
85.1
Wind Direction
184°
179°
Wind Speed (m/s)
7.6
8.8
Pressure (hPa)
1019
1017
Precipitation (in)
0.56
0.74
Total Precipitation (in.)
10.32
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)
39.96
Trends
Wind Direction
Temperature
RH
Pressure
Year
Month
Day
Type
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
15
Virga to Rain
Scattered
00:30
74
10.7
S
W
9.5
1.86
up - down
increasing
down - up
increasing
decreasing
down - up
2007
11
28
Virga to Rain
Scattered
19:00
40
4.0
SE
SE
7.0
1.08
increasing
up - down
flat
up - down
decreasing
up - down
2007
12
19
Rain
Scattered
06:30
49
6.4
SW
S
9.4
0.89
decreasing
decreasing
decreasing
up - down
increasing
increasing
2007
12
22
Virga to Rain
Continuous
09:00
15
4.3
NE
NE
9.6
0.38
down - up
increasing
up - down
increasing
decreasing
decreasing
2007
12
23
Rain
Scattered
09:00
39
6.7
SW
S
7.8
1.45
flat
up - down
increasing
decreasing
flat
down - up
2007
12
25
Virga to Rain
Scattered
16:30
78.5
2.9
S
SE
9.1
1.18
increasing
increasing
flat
flat
decreasing
up - down
2008
01
06
Rain
Scattered
10:00
32
3.3
S
SE
8.4
0.24
decreasing
up - down
flat
down - up
increasing
increasing
2008
01
08
Rain
Continuous
03:30
34
11.6
SE
SE
11.6
0.75
up - down
down - up
down - up
up - down
decreasing
down - up
2008
02
06
Virga to Rain
Scattered
16:30
60
6.8
SW
S
13.1
1.05
decreasing
increasing
up - down
down - up
increasing
down - up
2008
02
19
Virga to Rain
Scattered
21:30
16.5
8.0
SW
W
2.6
0.01
increasing
decreasing
down - up
increasing
increasing
increasing
2008
02
24
Rain to Virga
Continuous
05:00
10
8.6
SE
SE
9.1
0.06
increasing
increasing
flat
increasing
decreasing
increasing
2008
03
19
Virga to Rain
Scattered
13:00
45.5
6.9
S
SW
8.2
0.66
decreasing
up - down
increasing
down - up
decreasing
increasing
2008
03
23
Virga to Rain
Scattered
06:00
32.5
8.4
S
SE
9.6
0.28
decreasing
decreasing
increasing
increasing
down - up
down - up
2008
03
26
Rain
Scattered
18:00
33.5
5.5
SW
S
8.2
0.43
increasing
down - up
decreasing
up - down
up - down
up - down

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