| Storm Summary of 2008-2009 Winter Season (December - March) - 78 Storms |
Surface Observations from Portland International Airport Weather Station, Oregon (45°35'N , 122°36'W / Elevation: 5.8 m)
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Blue highlighted rows: Snow, freezing rain, or mixed cases Grey highlighted rows: Virga or mix of virga and rain, no snow Note: Missing MRR data from 12/25/08 to 12/31/08
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Trends |
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Wind Direction |
Temperature |
RH |
Pressure |
|||||||||||||||
Year |
Month |
Day |
Type |
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 |
2008 |
12 |
Virga to Rain |
Shallow to Borderline to Shallow |
Scattered |
08:03 |
5.6 |
6.5 |
SE |
SE |
5.7 |
0.01 |
down - up |
increasing |
up - down |
down - up |
flat |
decreasing |
|
2008 |
12 |
Virga to Rain |
Tall to Shallow to Borderline |
Scattered |
14:43 |
16.6 |
5.4 |
S |
SE |
12.0 |
0.27 |
increasing |
up - down |
up - down |
down - up |
decreasing |
decreasing |
|
2008 |
12 |
Virga to Rain |
Tall to Borderline |
Scattered |
10:54 |
15.3 |
3.8 |
S |
SE |
18.4 |
0.03 |
decreasing |
increasing |
increasing |
flat |
increasing |
increasing |
|
2008 |
12 |
Virga to Rain to Virga |
Borderline |
Scattered |
02:11 |
8.0 |
3.3 |
S |
S |
8.6 |
none |
increasing |
decreasing |
decreasing |
down - up |
increasing |
increasing |
|
2008 |
12 |
Virga to Mixed |
Borderline to Shallow to Tall |
Scattered |
12:11 |
13.0 |
-1.5 |
E |
E |
22.2 |
0.02 |
decreasing |
decreasing |
down - up |
decreasing |
increasing |
increasing |
|
2008 |
12 |
Virga to Mixed |
Borderline to Shallow |
Scattered |
01:11 |
8.6 |
-4.4 |
E |
E |
28.1 |
trace |
decreasing |
flat |
decreasing |
decreasing |
increasing |
increasing |
|
2008 |
12 |
Mixed to Rain |
Borderline |
Scattered |
13:27 |
15.9 |
0.9 |
S |
SW |
16.1 |
0.06 |
increasing |
increasing |
down - up |
increasing |
increasing |
increasing |
|
2008 |
12 |
Rain to Mixed |
Borderline to Shallow |
Scattered |
05:22 |
11.7 |
2.2 |
SW |
S |
10.1 |
0.07 |
increasing |
decreasing |
up - down |
increasing |
decreasing |
down - up |
|
2008 |
12 |
Rain to Mixed to Virga |
Borderline to Shallow to Tall |
Scattered |
21:14 |
10.9 |
1.5 |
SW |
SE |
6.3 |
trace |
down - up |
decreasing |
up - down |
up - down |
down - up |
increasing |
|
2008 |
12 |
Mixed |
Shallow to Borderline to Shallow |
Scattered |
15:00 |
20.8 |
0.2 |
W |
W |
4.0 |
0.02 |
flat |
up - down |
up - down |
down - up |
increasing |
increasing |
|
2008 |
12 |
Mixed |
Tall to Shallow |
Continuous |
11:48 |
21.3 |
-4.6 |
E |
SE |
20.0 |
0.01 |
flat |
decreasing |
up - down |
down - up |
increasing |
decreasing |
|
2008 |
12 |
Mixed |
Shallow |
Continuous |
09:08 |
7.5 |
-5.9 |
E |
E |
16.3 |
trace |
down - up |
up - down |
down - up |
up - down |
decreasing |
decreasing |
|
2008 |
12 |
Mixed |
Tall to Borderline |
Scattered |
16:37 |
11.7 |
-5.4 |
SE |
SE |
17.5 |
0.10 |
up - down |
up - down |
up - down |
down - up |
decreasing |
decreasing |
|
2008 |
12 |
Mixed |
Shallow to Tall |
Scattered |
06:57 |
16.6 |
-4.6 |
SE |
SE |
10.4 |
0.04 |
down - up |
down - up |
up - down |
up - down |
down - up |
down - up |
|
2008 |
12 |
Mixed to Rain |
Tall to Shallow to Borderline |
Continuous |
04:22 |
19.6 |
-1.8 |
SE |
SE |
14.1 |
trace |
decreasing |
down - up |
up - down |
increasing |
decreasing |
decreasing |
|
2009 |
01 |
Rain |
Tall |
Continuous |
00:00 |
18.7 |
6.2 |
SE |
SE |
8.5 |
1.09 |
flat |
down - up |
decreasing |
increasing |
increasing |
decreasing |
|
2009 |
01 |
Rain to Mixed |
Tall |
Continuous |
18:40 |
14.9 |
8.7 |
SW |
NW |
7.4 |
2.09 |
increasing |
decreasing |
decreasing |
increasing |
decreasing |
decreasing |
|
2009 |
01 |
Virga to Rain |
Tall to Shallow to Tall |
Scattered |
19:47 |
5.3 |
4.5 |
W |
SE |
2.7 |
0.03 |
increasing |
decreasing |
decreasing |
increasing |
increasing |
increasing |
|
2009 |
01 |
Virga to Mixed to Rain |
Tall to Shallow |
Continuous |
19:22 |
14.5 |
1.9 |
SE |
S |
11.2 |
0.22 |
increasing |
increasing |
decreasing |
increasing |
decreasing |
decreasing |
|
2009 |
01 |
Rain |
Shallow |
Scattered |
14:42 |
4.8 |
7.6 |
SW |
S |
1.8 |
trace |
increasing |
increasing |
up - down |
up - down |
increasing |
increasing |
|
2009 |
01 |
Virga to Rain |
Tall to Shallow |
Scattered |
01:20 |
23.3 |
9.8 |
S |
S |
11.4 |
0.11 |
up - down |
increasing |
down - up |
up - down |
increasing |
down - up |
|
2009 |
01 |
Rain to Virga to Rain |
Shallow to Tall to Shallow |
Scattered |
00:39 |
16.7 |
11.8 |
S |
S |
20.3 |
0.02 |
up - down |
flat |
down - up |
up - down |
increasing |
decreasing |
|
2009 |
01 |
Rain |
Shallow to Tall to Shallow |
Scattered |
17:18 |
6.1 |
12.6 |
S |
SW |
19.0 |
0.14 |
increasing |
increasing |
decreasing |
up - down |
down - up |
decreasing |
|
2009 |
01 |
Rain |
Shallow to Borderline to Shallow |
Scattered |
20:30 |
2.6 |
9.7 |
W |
W |
13.8 |
0.02 |
increasing |
decreasing |
down - up |
decreasing |
increasing |
increasing |
|
2009 |
01 |
Rain |
Shallow |
Continuous |
06:08 |
10.1 |
7.6 |
W |
NE |
1.5 |
0.14 |
decreasing |
down - up |
increasing |
up - down |
flat |
increasing |
|
2009 |
01 |
Virga |
Tall |
Scattered |
00:03 |
18.9 |
3.0 |
SE |
SE |
11.4 |
none |
up - down |
decreasing |
decreasing |
increasing |
decreasing |
increasing |
|
2009 |
01 |
Virga to Mixed |
Tall to Borderline |
Continuous |
02:00 |
14.6 |
0.8 |
SE |
SE |
7.4 |
0.05 |
up - down |
down - up |
increasing |
up - down |
up - down |
down - up |
|
2009 |
01 |
Virga to Mixed to Rain |
Tall to Shallow to Tall |
Scattered |
13:39 |
20.8 |
3.2 |
S |
SE |
6.6 |
0.03 |
flat |
increasing |
increasing |
increasing |
flat |
down - up |
|
2009 |
01 |
Rain |
Shallow |
Scattered |
20:17 |
5.2 |
7.4 |
W |
NE |
3.2 |
0.01 |
increasing |
decreasing |
decreasing |
increasing |
increasing |
increasing |
|
2009 |
02 |
Virga |
Tall |
Continuous |
20:49 |
2.1 |
3.5 |
NaN |
No wind |
0.0 |
none |
flat |
increasing |
increasing |
increasing |
flat |
down - up |
|
2009 |
02 |
Virga to Rain |
Tall to Shallow |
Continuous |
16:49 |
12.1 |
7.2 |
SE |
SE |
4.6 |
trace |
up - down |
up - down |
down - up |
down - up |
decreasing |
increasing |
|
2009 |
02 |
Virga to Rain |
Tall to Shallow |
Continuous |
04:55 |
14.5 |
4.4 |
E |
E |
0.6 |
0.11 |
decreasing |
down - up |
increasing |
increasing |
down - up |
increasing |
|
2009 |
02 |
Virga to Rain to Virga |
Borderline |
Scattered |
23:56 |
3.1 |
5.7 |
SE |
E |
9.0 |
0.07 |
increasing |
decreasing |
up - down |
increasing |
decreasing |
increasing |
|
2009 |
02 |
Virga to Rain |
Borderline |
Continuous |
20:44 |
4.8 |
5.0 |
SW |
S |
7.8 |
0.01 |
increasing |
decreasing |
decreasing |
increasing |
increasing |
increasing |
|
2009 |
02 |
Rain |
Tall to Borderline to Tall |
Continuous |
12:28 |
13.4 |
1.9 |
SE |
E |
13.3 |
0.19 |
decreasing |
increasing |
increasing |
increasing |
increasing |
increasing |
|
2009 |
02 |
Rain to Virga |
Borderline |
Scattered |
09:42 |
6.4 |
3.3 |
SE |
SE |
9.4 |
trace |
flat |
increasing |
decreasing |
down - up |
increasing |
increasing |
|
2009 |
02 |
Rain to Virga to Rain |
Shallow to Borderline to Shallow |
Scattered |
17:17 |
3.9 |
4.0 |
SE |
E |
6.0 |
0.02 |
increasing |
increasing |
decreasing |
up - down |
increasing |
increasing |
|
2009 |
02 |
Virga to Rain to Virga |
Tall to Borderline |
Continuous |
12:28 |
8.1 |
4.3 |
E |
E |
8.6 |
0.05 |
decreasing |
increasing |
flat |
decreasing |
decreasing |
decreasing |
|
2009 |
02 |
Rain |
Shallow to Borderline to Shallow |
Continuous |
15:37 |
5.3 |
6.9 |
E |
E |
9.9 |
trace |
down - up |
increasing |
flat |
up - down |
increasing |
increasing |
|
2009 |
02 |
Virga to Rain |
Tall to Borderline |
Scattered |
00:13 |
15.0 |
7.3 |
E |
E |
12.9 |
trace |
up - down |
increasing |
down - up |
increasing |
decreasing |
decreasing |
|
2009 |
02 |
Rain to Virga to Rain |
Shallow to Tall |
Scattered |
18:50 |
10.3 |
7.5 |
SE |
SE |
14.5 |
0.02 |
increasing |
decreasing |
up - down |
increasing |
increasing |
increasing |
|
2009 |
02 |
Rain |
Borderline to Tall |
Scattered |
12:24 |
11.2 |
6.0 |
SE |
E |
7.4 |
0.22 |
decreasing |
increasing |
increasing |
down - up |
up - down |
decreasing |
|
2009 |
02 |
Virga to Rain |
Tall to Shallow to Borderline |
Scattered |
04:06 |
17.3 |
8.4 |
S |
S |
12.6 |
0.21 |
decreasing |
increasing |
decreasing |
decreasing |
decreasing |
increasing |
|
2009 |
02 |
Virga to Rain |
Borderline to Shallow |
Scattered |
21:26 |
12.0 |
10.3 |
SW |
SW |
9.7 |
0.23 |
increasing |
decreasing |
decreasing |
increasing |
increasing |
decreasing |
|
2009 |
02 |
Rain |
Shallow to Tall |
Scattered |
09:28 |
22.9 |
8.2 |
SW |
S |
11.0 |
0.11 |
decreasing |
up - down |
increasing |
down - up |
decreasing |
down - up |
|
2009 |
02 |
Virga to Rain to Virga |
Tall to Borderline |
Scattered |
20:19 |
16.7 |
9.0 |
SE |
E |
12.0 |
trace |
increasing |
decreasing |
decreasing |
increasing |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Tall to Shallow to Tall |
Scattered |
18:26 |
10.8 |
7.9 |
SE |
SE |
12.0 |
0.04 |
down - up |
decreasing |
up - down |
up - down |
decreasing |
decreasing |
|
2009 |
03 |
Rain to Virga |
Borderline to Tall |
Continuous |
09:06 |
4.3 |
8.1 |
SE |
E |
12.0 |
0.13 |
down - up |
increasing |
up - down |
increasing |
decreasing |
increasing |
|
2009 |
03 |
Rain to Virga to Rain |
Borderline |
Scattered |
19:00 |
5.2 |
12.9 |
E |
S |
9.3 |
0.01 |
increasing |
up - down |
decreasing |
down - up |
increasing |
decreasing |
|
2009 |
03 |
Virga to Rain to Virga |
Tall |
Scattered |
04:20 |
10.1 |
6.9 |
SE |
E |
6.0 |
0.26 |
decreasing |
up - down |
increasing |
up - down |
decreasing |
down - up |
|
2009 |
03 |
Virga to Rain |
Tall to Borderline |
Scattered |
18:54 |
6.7 |
9.9 |
SE |
SE |
7.9 |
0.01 |
increasing |
up - down |
decreasing |
down - up |
increasing |
flat |
|
2009 |
03 |
Rain |
Shallow to Borderline |
Scattered |
20:57 |
4.7 |
9.5 |
N |
N |
3.2 |
0.12 |
increasing |
decreasing |
decreasing |
increasing |
increasing |
increasing |
|
2009 |
03 |
Rain |
Tall to Borderline |
Scattered |
11:18 |
6.5 |
6.7 |
SW |
SW |
9.1 |
0.08 |
up - down |
increasing |
increasing |
up - down |
decreasing |
down - up |
|
2009 |
03 |
Rain |
Shallow to Borderline to Shallow |
Scattered |
20:38 |
6.8 |
7.5 |
W |
W |
11.1 |
0.12 |
increasing |
decreasing |
decreasing |
increasing |
up - down |
increasing |
|
2009 |
03 |
Virga to Rain to Virga |
Borderline to Shallow |
Scattered |
09:27 |
10.9 |
5.1 |
SW |
W |
8.5 |
0.03 |
decreasing |
increasing |
increasing |
decreasing |
flat |
down - up |
|
2009 |
03 |
Rain to Mixed |
Shallow to Borderline |
Scattered |
20:22 |
12.8 |
4.6 |
W |
W |
8.7 |
0.22 |
increasing |
decreasing |
decreasing |
increasing |
up - down |
decreasing |
|
2009 |
03 |
Virga to Rain |
Shallow to Tall to Shallow |
Scattered |
18:48 |
9.4 |
4.6 |
SW |
N |
5.5 |
0.06 |
increasing |
up - down |
decreasing |
increasing |
decreasing |
down - up |
|
2009 |
03 |
Rain |
Shallow to Borderline |
Scattered |
12:32 |
11.8 |
3.2 |
SW |
N |
8.4 |
0.13 |
decreasing |
increasing |
up - down |
up - down |
up - down |
down - up |
|
2009 |
03 |
Virga to Rain to Virga |
Shallow |
Scattered |
00:20 |
13.0 |
3.4 |
W |
W |
6.6 |
0.01 |
down - up |
down - up |
up - down |
decreasing |
down - up |
increasing |
|
2009 |
03 |
Virga to Rain to Virga |
Shallow |
Scattered |
20:04 |
5.6 |
6.0 |
NE |
W |
4.7 |
trace |
increasing |
decreasing |
up - down |
increasing |
increasing |
flat |
|
2009 |
03 |
Virga to Rain to Virga |
Tall to Shallow to Tall |
Scattered |
13:07 |
12.8 |
7.9 |
S |
S |
14.1 |
0.24 |
down - up |
down - up |
up - down |
increasing |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Borderline to Shallow to Borderline |
Continuous |
01:52 |
18.1 |
7.9 |
S |
S |
12.2 |
0.57 |
up - down |
down - up |
up - down |
up - down |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Shallow to Borderline |
Scattered |
19:59 |
13.4 |
7.7 |
SW |
W |
14.3 |
0.08 |
increasing |
decreasing |
decreasing |
down - up |
down - up |
increasing |
|
2009 |
03 |
Rain |
Borderline |
Scattered |
09:25 |
22.8 |
7.3 |
S |
W |
9.6 |
0.19 |
down - up |
up - down |
up - down |
down - up |
increasing |
increasing |
|
2009 |
03 |
Virga to Rain |
Borderline to Shallow |
Scattered |
08:13 |
17.1 |
8.1 |
S |
S |
7.1 |
0.10 |
decreasing |
increasing |
increasing |
decreasing |
increasing |
increasing |
|
2009 |
03 |
Virga |
Tall to Borderline |
Continuous |
08:00 |
7.2 |
5.9 |
E |
E |
4.0 |
none |
decreasing |
up - down |
increasing |
decreasing |
increasing |
down - up |
|
2009 |
03 |
Virga to Rain |
Tall to Shallow |
Continuous |
11:10 |
6.6 |
8.3 |
E |
E |
7.1 |
0.01 |
decreasing |
increasing |
increasing |
up - down |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Shallow to Borderline |
Scattered |
04:10 |
5.7 |
10.9 |
E |
E |
9.0 |
trace |
up - down |
decreasing |
increasing |
increasing |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Shallow to Borderline to Shallow |
Scattered |
16:47 |
19.8 |
10.2 |
W |
S |
7.6 |
0.03 |
increasing |
decreasing |
decreasing |
down - up |
decreasing |
up - down |
|
2009 |
03 |
Virga to Rain |
Shallow to Tall to Borderline |
Continuous |
18:54 |
3.9 |
9.9 |
N |
SE |
5.8 |
0.02 |
increasing |
up - down |
decreasing |
down - up |
decreasing |
decreasing |
|
2009 |
03 |
Rain |
Borderline to Tall to Shallow |
Scattered |
08:02 |
23.1 |
7.2 |
W |
W |
7.8 |
0.09 |
decreasing |
up - down |
increasing |
down - up |
flat |
increasing |
|
2009 |
03 |
Virga to Rain |
Tall to Borderline |
Scattered |
17:44 |
15.5 |
6.3 |
SE |
SW |
10.6 |
0.15 |
increasing |
down - up |
decreasing |
increasing |
flat |
decreasing |
|
2009 |
03 |
Rain |
Borderline to Tall |
Continuous |
20:44 |
21.5 |
9.4 |
SW |
SW |
8.1 |
0.14 |
increasing |
decreasing |
decreasing |
down - up |
up - down |
decreasing |
|
2009 |
03 |
Virga to Rain |
Shallow |
Scattered |
18:13 |
5.5 |
9.5 |
W |
S |
3.3 |
trace |
down - up |
increasing |
up - down |
down - up |
decreasing |
decreasing |
|
2009 |
03 |
Virga to Rain |
Shallow to Borderline to Shallow |
Scattered |
14:24 |
6.9 |
8.4 |
E |
E |
5.3 |
0.01 |
down - up |
increasing |
increasing |
down - up |
increasing |
decreasing |
|
2009 |
03 |
Virga to Rain to Virga |
Tall to Shallow to Tall |
Scattered |
05:58 |
22.3 |
7.9 |
W |
NW |
8.0 |
0.50 |
up - down |
down - up |
down - up |
up - down |
decreasing |
decreasing |
|
2009 |
03 |
Virga to Rain |
Borderline |
Scattered |
13:23 |
9.0 |
7.9 |
W |
W |
8.9 |
0.04 |
decreasing |
increasing |
down - up |
decreasing |
increasing |
increasing |
|
2009 |
03 |
Rain to Virga to Rain |
Tall to Shallow to Borderline |
Scattered |
07:17 |
12.2 |
8.2 |
S |
W |
9.7 |
0.09 |
decreasing |
increasing |
increasing |
up - down |
decreasing |
decreasing |
|
Version 3, 5 August 2013
web page credits: Micheal Tai Bryant, Spencer Rhodes, Sandra Yuter
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. ATM-0544766 and ATM-0908420
contacts:
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the view of the National Science Foundation (NSF).
Dr. Sandra Yuter seyuter@ncsu.edu