Storm Summary with Scattered Profile of 2006-2007 Winter Season (November - March) - 56 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)

Blue highlighted rows: Snow, freezing rain, or mixed cases

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/Snow
Virga to Rain to Virga
Rain to Virga to Rain
Virga
Unknown
Continuity
Continuous
Scattered
Average
All
Page
Temp. (°C)
7.28
7.18
RH (%)
78.8
79.5
Wind Direction
165°
176°
Wind Speed (m/s)
8.6
8.3
Pressure (hPa)
1019
1020
Precipitation (in)
0.59
0.51
Total Precipitation (in.)
21.24
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 to Shallow
Borderline to Tall to Borderline
Shallow
Shallow to Borderline to (Shallow)
Shallow to Tall to Shallow
Shallow to Tall to Borderline
Avg. Duration (hrs)
24.96
Trends
Wind Direction
Temperature
RH
Pressure
Year
Month
Day
Type
AGL
Start Time (UTC)
Duration (hrs)
Avg. Temp. (°C)
Avg.
At Storm Maturity
Wind Speed (m/s)
Precip. (in)
before*
during
before*
during
before*
during
2006
11
1
Virga to Rain
Tall to Borderline
23:30
56
8.3
SE
SE
13.6
2.20
flat
down - up
down - up
increasing
decreasing
down - up
2006
11
4
Virga to Rain
Tall to Shallow
14:00
19.5
14.9
S
S
9.5
0.70
flat
up - down
flat
down - up
increasing
down - up
2006
11
8
Rain
Shallow to Tall to Shallow
09:00
25.5
9.7
SE
SE
6.1
0.70
decreasing
up - down
flat
down - up
increasing
decreasing
2006
11
9
Rain
Shallow to Borderline
20:00
2
11.1
SW
SW
8.3
0.01
increasing
down - up
decreasing
up - down
increasing
flat
2006
11
11
Rain
Shallow to Borderline to Shallow
20:30
15.5
9.2
SW
S
13.1
0.03
increasing
decreasing
decreasing
increasing
increasing
increasing
2006
11
12
Virga to Rain
Tall to Shallow
20:30
46
9.4
S
SE
16.2
0.44
increasing
up - down
decreasing
increasing
down - up
decreasing
2006
11
15
Virga to Rain
Tall to Borderline
01:00
28.5
11.0
SE
S
15.3
0.35
up - down
increasing
down - up
down - up
decreasing
decreasing
2006
11
16
Rain
Shallow
16:00
10.5
10.1
SE
SW
5.7
none
flat
increasing
flat
decreasing
increasing
increasing
2006
11
20
Virga to Rain
Borderline
10:30
2.5
10.0
SE
SE
6.5
none
up - down
flat
decreasing
flat
flat
increasing
2006
11
21
Rain
Tall to Borderline
09:00
91.5
7.5
S
S
11.5
2.53
flat
decreasing
flat
increasing
decreasing
increasing
2006
11
25
Rain
Shallow
11:00
1.5
5.1
W
W
6.3
none
down - up
up - down
up - down
decreasing
increasing
increasing
2006
11
26
Vigra to Rain
Shallow to Tall to Shallow
08:00
43.5
4.1
S
SE
11.0
0.58
decreasing
up - down
increasing
up - down
decreasing
down - up
2006
11
28
Rain
Borderline to Shallow
19:00
3.5
2.0
W
NW
5.0
0.01
flat
increasing
flat
decreasing
increasing
increasing
2006
11
30
Virga to Rain
Shallow to Tall to Shallow
03:30
14.5
2.2
SE
E
4.6
0.18
flat
increasing
flat
increasing
decreasing
down - up
2006
12
01
Rain to Virga
Shallow
09:30
16
4.5
SW
NW
2.1
none
decreasing
increasing
increasing
decreasing
increasing
up - down
2006
12
04
Rain
Borderline to Shallow
14:00
3
1.7
SE
SE
13.0
none
flat
increasing
down - up
up - down
up - down
increasing
2006
12
10
Rain
Tall
15:00
51
9.2
SE
SE
13.8
1.00
flat
up - down
decreasing
increasing
increasing
increasing
2006
12
13
Rain
Tall
00:30
71.5
8.6
S
SE
13.7
2.51
up - down
up - down
down - up
down - up
decreasing
down - up
2006
12
20
Virga to Rain
Shallow to Tall to Shallow
18:00
19
2.5
SE
SE
15.3
0.50
increasing
flat
flat
increasing
down - up
down - up
2006
12
23
Virga to Rain
Borderline to Tall to Shallow
05:30
23
4.7
SE
SE
7.5
0.50
flat
down - up
decreasing
increasing
decreasing
down - up
2006
12
25
Rain
Tall to Borderline
23:00
46.5
5.8
SW
NW
7.8
1.36
up - down
down - up
decreasing
increasing
decreasing
down - up
2006
12
29
Virga to Rain
Shallow
20:30
2.5
4.6
SW
SW
12.4
none
down - up
decreasing
up - down
increasing
increasing
increasing
2006
12
30
Virga
Tall
22:30
5
3.1
SE
SE
8.4
--
increasing
decreasing
decreasing
flat
decreasing
down - up
2007
01
04
Virga to Rain
Borderine to Tall to Borderline
10:00
9
5.2
SW
SW
7.3
0.32
down - up
up - down
up - down
down - up
up - down
increasing
2007
01
05
Rain to Virga to Rain
Shallow to Tall to Borderline
11:30
30.5
5.5
SE
S
13.4
0.62
increasing
increasing
down - up
down - up
increasing
down - up
2007
01
07
Virga to Rain
Tall to Shallow to Tall
01:00
20.5
8.6
S
S
15.8
0.32
up - down
increasing
down - up
increasing
increasing
flat
2007
01
10
Rain
Shallow to Tall to Borderline
00:00
27
3.1
SW
NW
8.0
0.50
increasing
decreasing
decreasing
down - up
decreasing
up - down
2007
01
16
Snow
Tall to Shallow
16:00
9.5
-2.4
S
S
9.5
0.05
up - down
increasing
increasing
down - up
decreasing
increasing
2007
01
18
Virga to Rain
Tall to Borderline
03:00
19
1.4
SE
SE
4.5
0.01
up - down
increasing
flat
decreasing
down - up
decreasing
2007
01
19
Virga to Rain
Borderline to Shallow
14:00
26
2.7
SE
SE
5.6
0.14
flat
up - down
flat
increasing
decreasing
down - up
2007
01
20
Rain
Shallow
22:00
5.5
6.5
SE
NE
3.1
0.01
increasing
decreasing
decreasing
increasing
up - down
increasing
2007
01
21
Virga to Rain to Virga
Tall to Shallow
08:30
25
2.9
SE
NE
0.9
none
decreasing
down - up
decreasing
flat
increasing
increasing
2007
02
01
Virga to Rain
Tall
23:00
31
2.9
SE
SE
4.3
0.01
increasing
down - up
decreasing
up - down
up - down
flat
2007
02
03
Rain to Virga
Borderline to Tall to Shallow
18:00
21
3.7
S
SE
1.5
0.42
increasing
flat
decreasing
increasing
increasing
up - down
2007
02
06
Virga to Rain
Tall to Borderline
19:00
6.5
10.0
SE
SE
3.3
none
increasing
up - down
decreasing
down - up
increasing
decreasing
2007
02
07
Virga to Rain
Tall to Shallow
09:30
32.5
5.8
SE
SE
9.4
0.11
flat
up - down
flat
down - up
decreasing
increasing
2007
02
10
Rain
Tall to Borderline
18:00
45.5
8.3
SE
SE
10.1
0.41
increasing
down - up
increasing
decreasing
decreasing
down - up
2007
02
13
Virga to Rain
Shallow to Borderline to Shallow
11:30
8.5
5.7
SE
SE
5.7
0.03
flat
increasing
flat
down - up
increasing
increasing
2007
02
14
Virga to Rain
Tall to Borderline
18:00
51.5
10.1
S
SE
7.6
0.73
increasing
up - down
decreasing
increasing
decreasing
down - up
2007
02
18
Rain
Tall to Shallow to Borderline
02:00
23
9.4
SW
SW
8.4
0.04
up - down
decreasing
down - up
up - down
decreasing
up - down
2007
02
19
Rain to Virga to Rain
Tall to Shallow to Tall
12:30
45
8.0
SW
S
13.7
0.68
flat
up - down
decreasing
down - up
decreasing
down - up
2007
02
22
Rain to Virga
Borderline to Tall to Borderline
02:00
43
5.2
SE
SE
9.7
0.30
down - up
down - up
up - down
increasing
decreasing
down - up
2007
02
28
Rain
Tall to Shallow
12:00
73
4.2
S
SE
8.4
0.65
up - down
increasing
flat
down - up
increasing
increasing
2007
03
05
Virga to Rain to Virga
Tall to Borderline
06:00
12
8.9
SE
SE
8.9
none
decreasing
flat
increasing
up - down
decreasing
down - up
2007
03
07
Virga to Rain
Tall to Borderline
10:30
20
10.6
S
SE
9.4
0.19
decreasing
down - up
increasing
up - down
decreasing
increasing
2007
03
08
Rain to Virga to Rain
Shallow to Tall to Borderline
13:30
11
10.0
S
SE
9.9
none
decreasing
up - down
increasing
down - up
increasing
decreasing
2007
03
09
Rain
Tall to Borderline
10:00
25.5
8.9
SE
SE
8.6
0.12
decreasing
increasing
increasing
increasing
increasing
increasing
2007
03
10
Rain
Tall to Borderline to Tall
16:30
17
12.5
SE
SE
9.0
0.03
flat
increasing
decreasing
down - up
down - up
decreasing
2007
03
12
Rain to Virga to Rain
Tall to Shallow
06:30
15.5
12.5
W
SW
5.5
0.16
decreasing
decreasing
increasing
up - down
down - up
increasing
2007
03
14
Rain
Shallow
18:00
24.5
8.2
S
SW
2.3
0.01
down - up
up - down
up - down
increasing
increasing
down - up
2007
03
17
Virga to Rain to Virga
Tall to Borderline
23:30
8
15.7
SE
NE
5.8
none
increasing
decreasing
decreasing
increasing
decreasing
increasing
2007
03
19
Rain
Shallow to Tall to Borderline
14:00
35
10.2
SW
W
9.6
1.32
decreasing
up - down
increasing
up - down
decreasing
increasing
2007
03
22
Virga to Rain
Tall
22:30
4.5
13.3
NW
N
6.0
none
increasing
decreasing
decreasing
increasing
decreasing
increasing
2007
03
26
Rain
Borderline to Tall to Shallow
16:00
32
8.0
SW
SW
7.3
0.12
down - up
down - up
up - down
up - down
decreasing
increasing
2007
03
28
Rain
Shallow
07:30
8
5.2
SW
SW
2.5
none
decreasing
up - down
increasing
increasing
increasing
increasing
2007
03
30
Rain
Shallow to Borderline to Tall
12:30
34.5
12.1
S
SW
5.0
0.34
decreasing
up - down
increasing
down - up
decreasing
decreasing

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