1/28/10-1/29/10 Winter Storm

January 28-29, 2010 Winter Storm Observations
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Observations Norman Area Pictures Pictures from Southwest Oklahoma Meteorological Charts Home Page

Ice accumulation measurements are accurate, but due to poor measuring device (small tape measure) snow accumulation measurements probably have an error of about +-.5”. Measurements were consistent, so the hourly snowfall accumulations are quite accurate. All temperature information came from the Norman mesonet station. If no reading was available, value was extrapolated from nearby stations and is therefore approximate. All observaions and pictures were taken from Norman, Oklahoma (observations taken near intersection of Chautauqua and Imhoff Rd.) and all times are CST. For any additional information or pictures, please feel free to contact me (Charles Kuster) at ckuster1@ou.edu.

1/28/10

9:00am:
Conditions: Light freezing rain with occasional sleet. 90% freezing rain, 10% sleet.
Ice accumulation: T on trees
Temperature: 30F

10:00am
Conditions: Light freezing rain with occasional sleet. 90% freezing rain, 10% sleet.
Ice accumulation: T on trees
Temperature: 28F

11:00am
Conditions: Light freezing rain with some sleet mixed in. 80% freezing rain, 20% sleet.
Ice accumulation: .1” on trees
Temperature: 28F

12:00pm
Conditions: Moderate freezing rain with rare sleet. 95% freezing rain, 5% sleet.
Ice accumulation: .2” on trees
Temperature: 28F

1:00pm
Conditions: Light freezing rain with rare sleet. 95% freezing rain, 5% sleet.
Ice accumulation: .2”-.25” on trees
Temperature: 29F

2:00pm
Conditions: Light freezing rain with rare sleet. 95% freezing rain, 5% sleet.
Ice accumulation: .3” on trees
Temperature: 29F

3:00pm
Conditions: Moderate sleet/freezing rain mix. 30% freezing rain, 70% sleet. Transition to more sleet than freezing rain occurred at 2:47pm CST.
Ice accumulation: .4” on trees
Temperature: ~29F (no observation available)

4:00pm
Conditions: Light sleet with rare freezing rain. 5% freezing rain, 95% sleet.
Ice accumulation: .4” on trees
Temperature: ~30F (no observation available)

5:00pm
Conditions: Moderate sleet. 100% sleet.
Ice accumulation: .4” on trees
Temperature: ~30F (no observation available)

6:00pm
Conditions: No precipitation falling. Sleet ended at approximately 5:45pm CST. Dry slot is affecting the area from now through approximately 10:30pm CST.
Ice accumulation: .4” on trees
Temperature: 29F

11:30pm
Conditions: Light freezing rain. 100% freezing rain.
Ice accumulation: .5” on trees
Temperature: 30F

1/29/10

7:30am
Conditions: Light sleet/snow/freezing drizzle mix. 50% snow, 30% sleet, 20% freezing drizzle (this ratio was difficult to ascertain and is therefore approximate).
Ice accumulation: .6”-.7” on trees
Temperature: 25F

8:00am
Conditions: Flurries. 100% snow. Transition to all snow occurred between 7:40am and 8:00am CST.
Ice accumulation: Remains at .6”-.7” on trees for remainder of storm.
Snow accumulation: T
Temperature: 25F

9:00am
Conditions: Flurries
Snow accumulation: T
Temperature: 25F

10:00am
Conditions: Light snow
Snow accumulation: ~.1”       Snow in past hour: .1”
Temperature: ~25F (no observation available)

11:00am
Conditions: Moderate snow.
Snow accumulation: ~.3”       Snow in past hour: .2”
Temperature: 25F

12:00pm
Conditions: Moderate snow.
Snow accumulation: ~.6”       Snow in past hour: .3”
Temperature: 24F

1:00pm
Conditions: Heavy snow.
Snow accumulation: ~1.3”       Snow in past hour: .7”
Temperature: 23F

2:00pm
Conditions: Moderate snow.
Snow accumulation: ~2.6”       Snow in past hour: 1.3”
Temperature: 23F

3:00pm
Conditions: Heavy snow.
Snow accumulation: ~3.2”       Snow in past hour: .6”
Temperature: 23F

4:00pm
Conditions: Moderate snow.
Snow accumulation: ~4.3”       Snow in past hour: 1.1”
Temperature: 22F

5:00pm
Conditions: Light snow.
Snow accumulation: ~5.0”       Snow in past hour: .7”
Temperature: ~22F

6:00pm
Conditions: No precipitation falling. Snow ended at about 5:50pm CST. Storm is essentially over.
Snow accumulation: ~5.1”       Snow in past hour: .1”
Temperature: ~22F

7:40pm-8:10pm
Light snow shower which brought only an additional trace of snow.

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Pictures (from Norman, OK):

Picture taken at 3:07pm CST on 1/28/10 9:09am CST on 1/29/10

9:08am CST on 1/29/10 Isolated .9" ice accumulation. Most trees have .6"-.7" of ice.

The following set of images was taken on 1/28/10 prior to the second round of freezing rain (between 7:00pm and 10:30pm CST).

1/30/10

Two above pictures taken on 1/30/10 in Norman, OK.

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The following set of images was taken from various locations across southwestern Oklahoma on 1/31/10. This part of the state was hit much harder than Norman with some locations receiving up to 1.5" of ice. Tree and power line damage was severe in places, especially along highway 183 between Hobart and Roosevelt, OK.

4 miles west of Gotebo, OK. 1.1” of ice.

6 miles west of Gotebo, OK. (both images)

Hobart, OK. 1.0” of ice.

3 miles southeast of Hobart, OK on Highway 183.

Dozens of this type of power pole were snapped between Hobart and Roosevelt, OK along Highway 183.

Heavy ice accumulations 2 miles north of Roosevelt, OK. Ice accumulations measured 1.5” at this location.

Roosevelt, OK

Severe tree damage about 4 miles south of Roosevelt, OK.

Severe tree damage about 4 miles south of Roosevelt.

Ice measurements and brief observations from several locations in southwestern Oklahoma:

Location	Amount of Ice	Observation
Verden	.7” of ice
Anadarko	.8” of ice	I first noticed power lines and a few power poles down just west of town.
Fort Cobb	.6” of ice	There seemed to be an area of lower ice accumulation extending from Fort Cobb to near Mountain View. Tree and power line damage was not as severe as well.
Mountain View	.7” of ice
4 miles west of Gotebo	1.1” of ice	Several poles down.
Hobart	1.0” of ice
2N Roosevelt	1.5” of ice	The worst area I came across was between Hobart and Roosevelt on Highway 183. Damge to trees and power poles was extensive.
Mountain Park	.6” of ice	Ice accumulations quickly dropped off south of Roosevelt and only measured .6” at Mountain Park, and even less (about 1/4”) at Snyder.

1/29/10 00Z:

1/29/10 12Z:

Soundings:

January 28-29, 2010 Winter Storm Observations