2018-08-05-17-56-43

Aug 4.                      min.       max.      avg

Bitt 2nw valley     58.2        77.3       67.7

Garrett College     61.3        79.6       70.4

Can-Heights          56.8         75.9      66.3

CRN-Canaan        58.0          75.4      66.7

Cabin Mt               57.0          73.9     65.4

Cabin Mt north   58.5           75.0     66.7

Spruce Knob       56.7          72.3      64.5

Snowshoe

Can-Valley Floor  50.7        77.4      64.0

7Springs                62.3        76.5      69.4

Dreary looking start, cloudy, late morning skies broke for a nice overall day

Temp profile this afternoon

Radar estimate past 24Screenshot_20180804-225615

Satellite this afternoon

Flow

Surface features and 500mb height anomalies

 

Aug 3.                     min.       max.      avg

Bitt 2nw valley     59.8         72.3      66.0

Garrett College     64.0         75.0      69.5

Can-Heights           57.2         68.6     62.9

CRN-Canaan          57.9         68.0     63.0

Cabin Mt                56.8         65.5     61.1

Cabin Mt north     59.2         67.6     63.4

Spruce Knob          55.8        63.0     59.4

Snowshoe               59.0        64.8      61.9

Can-Valley Floor   56.1        71.2       63.6

7Springs                  63.5        72.3       67.9

Rainy morning, midday break, rainy evening, with breaking skies at sunset.

Temp profile this afternoon2018-08-05-16-37-34

 

2018-08-05-16-30-40Radar with estimates… Picked up .7 from 6pm to 6pm at Bittinger 2nw Valley

Screenshot_20180803-221250

Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

 

 

Aug 2.                       min.       max.      avg

Bitt 2nw valley      61.4          71.2      66.3

Garrett College      63.6          74.8      69.2

Can-Heights           60.8          71.8      66.3

CRN-Canaan          60.7           72.6     66.6

Cabin Mt                58.5           69.4     63.9

Cabin Mt north     59.5          69.6     64.5

Spruce Knob         57.9          68.5     63.2

Snowshoe              59.0          68.2     63.6

Can-Valley Floor  59.5           75.9    67.7

7Springs                 62.2          70.6    66.4

Rainy start, some patchy fog, to drying but mostly cloudy midday, afternoon..few peaks of sun….mid afternoon showers. Bittinger 2nw Valley 4pm downpour. To another dry period with period of rain nightfall, thereafter.

Temp profile this afternoon2018-08-03-07-56-06

2018-08-03-08-01-11Radar with 24hr estimates…Estimates seem high in spots vs obs…. I picked up .3 at Bittinger 2nw Valley through 6pm, Spruce Knob was over 1″ daily, Cabin at Bald Knob .86 daily.. so estimates look off

Screenshot_20180802-223335

Satellite

Flow

Surface features and 500mb height anomalies and flow

Aug 1.                         min.      max.     avg

Bitt 2nw valley          59.5       75.0      67.2

Garrett College          63.2       78.5      70.8

Can-Heights               60.7       75.3       68.0

CRN-Canaan              61.2        74.4      67.8

Cabin Mt                    59.0        71.6      65.3

Cabin Mt north         59.7        74.8     67.2

Spruce Knob             58.3         71.8     65.0

Snowshoe                 58.5         70.0      64.2

Can-Valley Floor      59.4         78.1     68.7

7Springs                    62.7         71.4     67.1

Cloudy, some fog, morning rain, then mainly cloudy with some breaks of sun early afternoon to a heavy period of rain around 4pm….then some lighy rain later evening

Temp profile this afternoon2018-08-02-08-40-42

 

2018-08-02-08-39-48Radar with estimates. I picked up .6 today at Bittinger 2nw Valley with the brunt of that with the 4pm burst

Screenshot_20180801-222010

Satellite, at various times as it had some opetational issues today

Flow

Surface features and 500mb height anomalies and flow

 

July 31.                       min.        max.     avg

Bitt 2nw valley        59.3        70.3      64.8

Garrett College       59.4         73.7      66.5

Can-Heights            56.8          72.4     64.6

CRN-Canaan

Cabin Mt                 55.2        69.6       62.4

Cabin Mt north     55.8        71.6        63.7

Spruce Knob         54.0         67.3       60.6

Snowshoe               57.6        66.2       61.9

Can-Valley Floor   49.1         77.7       63.4

7Springs                 58.4         66.4       62.4

Cloudy, some high ground fog, east flow…clouds held tough in the traditional cooler east flow locations. Breaks elsewhere..Heavy period of rain after 4pm.

Temp profile this afternoon2018-08-01-08-10-29

 

(July Summary at page bottom)

Radar with estimates I picked up .9 at Bittinger 2nw Valley, Garrett College also at .9

Screenshot_20180731-221056

Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

 

July Summary

Bittinger 2nw Valley

 

-days with mins in 40s   10

-days with mins in 50s    17

-days  with mins in 60s     4

-days with max 60s     3

-days with max 70s    20

-days with max 80s     8

-warmest min 65.7

– coolest max 65.9

CRN-CANAANScreenshot_20180806-081712

Temperatures

PrecipitationPRISM_ppt_provisional_4kmM3_anomaly_201807

July 30.                  min.       max.      avg

Bitt 2nw valley      54.5       65.9      60.2

Garrett College      61.0       69.8     65.4

Can-Heights            57.0       69.7    63.3

CRN-Canaan           54.5       69.2    61.9

Cabin Mt                 55.2       65.7     60.4

Cabin Mt north     55.9        64.8     60.3

Spruce Knob         54.0        67.3      60.6

Snowshoe              55.6        68.4      62.0

Can-Valley Floor   56.7        71.1     63.9

7Springs                 59.5        65.6     62.5

Heavy downpours before dawn in spots then a steadier rain mid morning into the afternoon. Skies broke a little towards evening. Wv high ground ran a rain cooled mid 50s for part of the afternoon.

Temp profile this afternoon2018-07-31-08-13-37

Radar and estimates..picked up .7  today at Bittinger 2nw Valley

Screenshot_20180730-215737

Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

July 29.                     min.      max.        avg

Bitt 2nw valley       45.4       73.3        59.3

Garrett College       48.6       77.6        63.1

Can-Heights            48.8       70.0        59.4

CRN-Canaan           47.7       72.6       60.1

Cabin Mt                 51.6        68.9       60.2

Cabin Mt north      53.2        67.8      60.5

Spruce Knob          49.8         68.0      58.9

Snowshoe              55.2          68.2      61.6

Can-Valley Floor   41.5         76.5      59.0

7Springs                 58.6         73.2      65.9

Mostly clear to start, more cloudiness wv mts vs north,  valley fog widespread.  The day much like yesterday had building clouds and at times skies were mostly cloudy. A few showers along the Allegheny Front and southern Alleghenies.

Temp profile this afternoon2018-07-30-08-14-13

 

The Glades under mainly clear skies bottoming out at 38.2°2018-07-29-21-22-19

2018-07-30-08-13-15

Screenshot_20180730-114650Radar and radar estimates through 8pm

Screenshot_20180729-200612

Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

 

 

 

 

18z 3km Nam

2m Temperatures

2m Dew Points

Simulated Radar

July 28.                     min.       max.     avg

Bitt 2nw valley       49.6        71.7     60.6

Garrett College       55.5        72.4     63.9

Can-Heights            54.9        69.9     62.4

CRN-Canaan         52.5         70.1      61.3

Cabin Mt                53.4        68.5      60.9

Cabin Mt north     55.4        68.4      61.9

Spruce Knob          53.4        66.6      60.0

Snowshoe               55.0       65.8      60.4

Can-Valley Floor    47.3       72.7     60.0

7Springs                  58.2        70.3    64.2

Clear start, more clouds Wv mts. Then building clouds, with a sun/cloud mix the remainder of the day with a 60-80% cloud cover at times.

Temp profile this afternoon2018-07-29-13-51-53

 

2018-07-29-13-58-24Rainfall occured with the few remaining showers last night after dusk, including that here for the 24 hour estimated total. Screenshot_20180728-212217

Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

 

18Z 3km Nam

2m Temperatures

2m Dew Points

Simulated Radar

10m Winds

Cloud Cover

July 27.                        min.       max.     avg

Bitt 2nw valley         57.7        72.7      65.2

Garrett College        62.0         75.3      68.6

Can-Heights             61.4         76.3      68.9

CRN-Canaan            60.0        74.9      67.6

Cabin Mt                  59.4        73.9      66.6

Cabin Mt north       60.4        75.0      67.7

Spruce Knob           57.6        71.1      64.3

Snowshoe                58.6        69.4      64.0

Can-Valley Floor    47.8        77.0       62.4

7Springs                 62.0         71.1       66.6

Mix of clouds and sun to start, quickly clouding over. A period in the afternoon with a line of passing light showers. That passed and skies broke….after dusk, a few more brief passing showers pushed through parts of the area(snippet of that below radar estimates)

Temp profile this afternoon2018-07-28-07-13-32

 

2018-07-28-07-12-16Radar with radar estimated precip

Screenshot_20180727-200811

Screenshot_20180727-210545Satellite this afternoon

Flow

Surface features and 500mb height anomalies and flow

 

 

 

 

18Z 3km Nam

2m Temperatures

Dew Points

Simulated Radar

10m Winds

Cloud Cover Percentage

12Z ECMWF

Next week model indicating ridge backing in from the east. This “may” for a time shift the precip shield over the Alleghenies that has overall missed out on appreciable precip over the past 7 days and in some areas, the month.

12Z ECMWF 6 hourly precip

500mb heights and anomalies

2m Temperature anomalies. Likely a setup of cloudy afternoons with some periods of rain holding temps slightly below normal for maxes, and cloud cover, holding temps at or above at night

Another look at the last 7 day observed precipScreenshot_20180727-134351

July 26.                       min.      max.       avg

Bitt 2nw valley        58.1       77.6       67.8

Garrett College        61.0       78.4      69.7

Can-Heights            59.5        74.2      66.8

CRN-Canaan           57.6        74.1      65.8

Cabin Mt                 57.7        71.6      64.6

Cabin Mt north      58.6        72.7     65.6

Spruce Knob          56.5        70.5     63.5

Snowshoe               58.8        70.2     64.5

Can-Valley Floor    48.2        77.0     62.6

7Springs                  61.5        75.0     68.2

Dreary looking start, some fog, low clouds and that then burnt off for a mix of clouds and sun of varying amounts from late morning, through evening with the sunny side of things increasing as the day went by.

Temp profile this afternoon2018-07-27-08-30-05

Satellite this afternoon

Radar, mostly last evening in where it did rain, with 24 hour estimates running back to 7pm 7/25

Screenshot_20180726-195534

Flow

surface features and 500mb height anomalies

500mb flow

SST(Sea Surface Temperature) anomalies and 7 day change

Off The Models

Meteogram off the 12z ECMWF for Garrett County

K2G4_2018072612_dx_240

12Z ECMWF

3 hourly precip

Total Precipitation

18z GFS

6 hourly precipitation

Total Precipitation

18Z 3km Nam

2m Temperatures

2m Dew Points

Simulated Radar

Total Precipitation

10:30pm reality, model comparison

The new 0z 3km Nam run is in. So thats the go to choice. The formula I’v been watching, to get a good feel for what the cold frost pockets can achieve is

1- 10m wind off the 3km Nam calm. In this case, we can check that off. At least for the valley spots. While 3km is high res, its still not tight enough to pinpoint details, but gives great hints.

hires_uv10m_dir_wv_4

2- Cloud cover, are we seeing clear skies. The 3km nam does very well at this. In this case, checked this off. hires_tcloud_wv_4

3- 2m Dewpoints. Pretty big component. Again, 3km nam is detailed, but not tight enough for minute details. The observations and comparisons has led to the conclusion on many many occasions, that, with a dry air mass incoming, or in place, calm winds, clear skies, subtract 4-8° from the 3km nam modeled dewpoint and that is generally where the 2m temp comes in at in the cold pockets. Placement of the modeled 2m Dewpoints is not important. If conditions above(1&2) check off the list. Ex. If the models lowest dewpoint is in Elkins at 45 and Canaan reads 55 on the model,  Canaans frost pocket actual dewpoint, air temp, if conditions(calm, clear)of 1 and 2 are equal to Elkins, (on the model) reality should run 38-42° 2m air temp.  In the case below off tonights 0z 3km nam, 56.2° dewpoint is the min at the example time. All in all for this example, lowest dewpoints are in the ballpark area of the conversation, despite it doesn’t have to be. hires_dew2m_wv_4

4- While in cases of east flows, CAD events, even daytime maxes with a breeze I love the 3km nam, (best there is bar none, beats HRRR easily) it is not good at hitting cold pockets. Again, not in tight enough for small details even at 3km, but I would think as in the current case, and many other times observed, it should do better. With 0 wind, 56° dewpoint, clear skies, why is it not modeling pockets of cooler temps? 3km should be enough to do that. This aspect of the model is one of its problems on 2m temps. Its not always great at convective storms and will falsely on the model cool locations that do not occur. That’s another downfall.  It is though great for frontal timing however. Currently, thumbs down for tonights example on temps. Way to warm. hires_t2m_wv_4

Reality views. While the valley frost pocket has no anemometer, its evident conditions are calm, while at 4000′ a 10mph exist. The model, looks decent. At 4000 its 63°, not bad on the model, 51° in the colder valley area, no clue on the model, except using the 1,2,3 formula from observations of the model to reality.

Reality at a little past 10:30pm

(To note, Hrrr last night showed clear skies through daybreak, 3km nam showed increasing cloud cover and temps creeping up, 3km Nam did well.)