April 22, 2013

Mountain Weather Forecast


Well, that’s a wrap. Ya-all have a great summer.  

J.Meriwether

April 19, 2013

Mountain Weather Forecast -Time: 1030

 This morning’s radar is lit up with bands of heavy moisture streaming into western Washington. A cold front arriving tonight will reduce freezing levels a bit and change the precipitation to showers tomorrow. Mixed rain and snow changing to snow can be expected on the lower mountain tomorrow.

Long-range: Remnant snow showers will linger into Sunday. High pressure is still scheduled to begin on Sunday with dry and warmer weather expected for most of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .75 Snow equivalent = 1-3

Total inches of water by noon tomorrow = 1
Total inches of snow by noon tomorrow = 4-6 upper mountain

Trend and Timing:
Moderate to heavy rain will continue today and gradually change to snow tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 36
Freezing level: 6000’ 4000’

Trend and Timing:
Freezing levels will slowly descend through the next 24-36 hrs.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-15 NW
Ridge Top: 10-20 NW

Trend and Timing:
Blustery NW winds will also be a factor with the passing of these fronts.



J.Meriwether

April 18, 2013

Mountain Weather Forecast -Time: 1000

The first of several fronts has moved on shore this morning and is expected to hit the mountains later today. Tonight and tomorrow will be quite wet with moderate to heavy rain expected.

Long-range: Rain will change to snow late Friday night with snow showers continuing to fall along the crest of the Cascades on Saturday. Sunday will turn dry and sunny as high pressure builds.

Models still show dry conditions and considerably warmer temperatures for most of next week. Wenatchee could hit 80f by the middle of the week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .75 - 1 Snow equivalent = 2-4

Total inches of water by noon tomorrow = 1-1.5
Total inches of snow by noon tomorrow = 4-6 upper mountain

Trend and Timing:
Light snow changing to moderate to heavy rain can be expected during the next 24-36 hrs. The upper ridge could see a little snow mixed in with the rain.

36hr storm totals could exceed 2” of water powered by the Puget Sound Convergence Zone.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 30 High: 36
Freezing level: 4000’ 5500’

Trend and Timing:
Freezing levels will rise to +5000’ today. Above freezing temperatures will continue through most of tomorrow.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 WSW
Ridge Top: 10-20 W

Trend and Timing:
Strong westerly flow will accompany these fronts. Ridge top winds could reach 40mph from time to time.



J.Meriwether

April 17, 2013

Mountain Weather Forecast -Time: 1045

 A pretty splendid start to the day with sunshine all around. Clouds will begin to move in today as a series of frontal systems approach. Snow will arrive early tomorrow morning and switch to rain through the day.

Long-range: Friday will be quite wet with moderate to heavy rain below 4500’ and mixed rain and snow on the upper mountain. The precipitation will begin to diminish on Saturday. Sunday will be mostly dry under building high pressure. Spring will make a good showing next week as high pressure strengthens.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .25-.5
Total inches of snow by noon tomorrow = 2-4

Trend and Timing:
Snow will begin early tomorrow morning. Wet heavy snow will change to rain through the day.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 26 High: 36
Freezing level: +- 4500’

Trend and Timing:
Freezing levels will hover between 4000’ and 5000’ through tomorrow.
24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 W
Ridge Top: 5-10 W

Trend and Timing:
Light westerly winds will continue through tomorrow.



J.Meriwether

April 16, 2013

Mountain Weather Forecast -Time: 0930

Some instability in the upper atmosphere has allowed some cumulus clouds to form, hence the snow showers. High pressure is still expected to strengthen today for a period of dry and mostly clear weather.

Long-range: The high pressure cell is expected to be pushed south on Thursday allowing another round of fronts to track through the PNW. This system is entraining a large warm air mass which will likely cause rain below 5000’ on Thursday and Friday. Models diverge on their predictions for the weekend, but it will probably be rainy with a chance of some mixed snow.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = Trace

Total inches of water by noon tomorrow = .10
Total inches of snow by noon tomorrow = Trace

Trend and Timing:
This morning’s radar has scattered snow shower centered over the mountains. The Puget Sound area is already clearing. Dry and more stable conditions develop during the next 12-24hrs.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 32
Freezing level: 3000’ 4000’

Trend and Timing:
Temperatures and freezing levels will vary between 3000’ and 5000’ for the next few days. Freezing levels are expected to rise above 5000’ on Thursday/Friday.


24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 NE
Ridge Top: 5-10 NNE

Trend and Timing:
North east flow will continue through the night. Westerly flow will take over tomorrow.



J.Meriwether

April 15, 2013

Mountain Weather Forecast -Time: 1030

 The start of the week will trend dry and clear as the high pressure cell developing off shore drifts east. Light snow showers will continue to be possible today.

Long-range: Models have the high pressure ridge flattening on Thursday; this will open the door for another frontal system. Freezing levels will be close to 4000’ with a rain snow mix event anticipated Thursday through the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = trace- 2

Total inches of water by noon tomorrow = .10
Total inches of snow by noon tomorrow = 2

Trend and Timing:
Light snow showers with sun breaks will be the pattern today. Tonight and tomorrow will be mostly dry.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 32+
Freezing level: +-3000’

Trend and Timing:
Freezing levels will remain low under cool NE flow for the next few days. Surface temperatures may climb close to or slightly above freezing with the aid of the sun today and tomorrow.


24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 NE
Ridge Top: 0-10 NE
Trend and Timing:
Weak NE flow will continue through tomorrow.



J.Meriwether

April 12, 2013

Start Time Saturday---6:15am

Mountain Weather Forecast -Time: 0930

This morning’s radar has the leading edge of the approaching cold front just about to hit the coast. Clouds will thicken through the day with snow reaching the mountains later this afternoon. Snow will continue tomorrow with Sunday trending dry as high pressure begins to build over the region.

Long-range: Spring returns on Monday as high pressure develops over the state. Dry, warm and clear will be the dominate weather pattern for most of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .5-.75 Snow equivalent = 6-10

Total inches of water by noon tomorrow = 1
Total inches of snow by noon tomorrow =10-12

Trend and Timing:
The snow is expected to begin this afternoon and intensify through the night. Snow will begin to taper off tomorrow night.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 36
Freezing level: 4000’ 2000’

Trend and Timing:
Surface temps will spike up today and then fall in the wake of the cold front. Freezing levels will descend to around 2000’ after midnight tonight and bounce back up to around 3000’ tomorrow.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 10-15 WNW
Ridge Top: 10-20 WNW gusty +40 possible

Trend and Timing:
Wind will shift NW once the front moves through this evening. High winds will accompany the fronts starting early tomorrow morning.



J.Meriwether

April 11, 2013

8:00 Start Time for Friday April 12th, 2013

Weather forecast delay

Due to intermittent internet access – I am unable to access weather models. Hopefully this will clear up later today.


John

April 10, 2013

Start Time Thursday---8am

Mountain Weather Forecast -Time: 1100

The rain will taper off tonight with light snow expected tomorrow. Friday will be mostly dry with snow on Saturday.

Long-range: It appears the winter is not quite done yet. Models continue to show cool northwest flow through the weekend and into early next week. The mountains can expect to gain some new snow through the middle of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .5-.75 Snow equivalent = 2-4

Total inches of water by noon tomorrow = .75
Total inches of snow by noon tomorrow = 3-6

Trend and Timing:
Rain should begin to turn to snow above 4500’ this afternoon. The precipitation will diminish to lights snow showers overnight.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 38
Freezing level: 6000’ 3500’

Trend and Timing:
Freezing levels will reach 4000’ after 4pm today. Freezing levels will remain below Pass level through the end of the week.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-15 NW Gusty
Ridge Top: 10-20 NW

Trend and Timing:
Winds will shift NW and strengthen this afternoon.



J.Meriwether

April 9, 2013

Mountain Weather Forecast -Time 1030

 Mountain Weather Forecast

Clouds will thicken today as a strong warm front tracks in from the southwest. Rising freezing levels and rain below 6000’ can be expected tomorrow. Snow showers with sun breaks return on Thursday and Friday.

Long-range: Models are starting to settle on a cool northwest flow event developing on Thursday/Friday with low freezing levels and snow probable for the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .75
Total inches of snow by noon tomorrow = 0

Trend and Timing:
Light snow will develop this evening and change to rain over night. The rain should diminish tomorrow afternoon and turn to light snow showers.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 40
Freezing level: 3500’ 6000’

Trend and Timing:
Freezing levels will peak around 6000’ early tomorrow morning. Temperatures will begin to fall tomorrow evening as cool NW flow filters in.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 W
Ridge Top: 5-15 WSW gusty

Trend and Timing:
SW flow aloft will strengthen overnight. Some gusty winds can be expected as the front moves through early tomorrow morning.



J.Meriwether

April 8, 2013

Mountain Weather Forecast -Time: 0900

 The snow will eventually taper off today as a weak high pressure ridge forms over the region. The sun may even make an appearance this afternoon. Another frontal system will bring snow changing to rain tomorrow evening.

Long-Range. Wednesday will be wet with heavy rain at times. Another high pressure ridge moves through on Thursday and Friday for generally dry and clear weather ending the week. Cold NW flow develops on Saturday with snow likely for the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = <.25 Snow equivalent =1-3

Total inches of water by noon tomorrow =.25
Total inches of snow by noon tomorrow =2-4

Trend and Timing:
Light snow showers will continue for most of the day. The atmosphere will be dry tonight with the next front arriving tomorrow afternoon.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: High: 34
Freezing level: +-4000’

Trend and Timing:
Freezing levels will hover around 4000’ through the night. Temperatures will begin to rise tomorrow afternoon influenced by southwesterly flow.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 NW shifting E
Ridge Top: 0-10 NW shifting E

Trend and Timing:
Winds will shift from north to east then to south over the next 24-36hrs.


J.Meriwether

April 6, 2013

Start Time Sunday---8am

Mountain Weather Forecast -Time: 0930

 The freezing levels will continue their slow decline for the rest of the weekend. Hopefully the precipitation will remain largely snow, and potentially a lot of it by closing tomorrow afternoon.

Long-range: Next week will start out with light snow showers and sun breaks. A warm front arrives on Tuesday with high freezing levels and rain wrapping up the week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25-.5 Snow equivalent = 4-6

Total inches of water by noon tomorrow = +.75
Total inches of snow by noon tomorrow = 6-10

Trend and Timing:
Light to moderate snow will continue through the night. Another cold front will enhance snow intensity after 6am tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 34
Freezing level: 5000’ 4000’

Trend and Timing:
Temperatures will continue to fall through the night. Freezing levels should drop below 4000’ around midnight tonight.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 WSW
Ridge Top: 5-15 WSW

Trend and Timing:
Southwesterly flow will continue. A brief east flow episode will be possible early tomorrow morning. Winds will shift westerly tomorrow afternoon and strengthen.



J.Meriwether

April 5, 2013

Start Time Saturday 8am

Mountain Weather Forecast -Time: 1030

Rain with periods of snow will continue today. Temperatures will continue their slow decline through the night with the precipitation turning to snow tomorrow.

Long-range: Several fronts will move through the PNW Mountains until late Sunday night. Monday is shaping up to be dry with another storm developing on Tuesday for another round of snow/rain.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .75-1 Snow equivalent = 2-6

Total inches of water by noon tomorrow = 1-2
Total inches of snow by noon tomorrow = 4-8

Trend and Timing:
Telemetry shows over 1.5” of rain since noon yesterday. The moisture will continue to stream into the mountains through the weekend.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 30 High: 36
Freezing level: 5500’ 4000’

Trend and Timing:
Temperatures will continue to drop slowly through the weekend. Freezing levels are expected to reach 4500’ today, 4000’ tomorrow and then 3500’ on Sunday.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-15 WSW
Ridge Top: 15-30 WSW

Trend and Timing:
Winds will also be a factor as these front move through. Short periods of 40+ can be anticipated this afternoon.



J.Meriwether



April 4, 2013

Start Time Friday 8am

Mountain Weather Forecast -Time: 0930

This morning’s radar has the first round of moisture already moving into the mountains with the main event expected to arrive later today. Moderate to heavy rain can be expected today and tomorrow.

Long-range: The crucial question is when will the temperatures fall enough to change the rain to snow? Freezing levels are expected to fall below 5000’ early tomorrow morning and then reach 4000’ by early Saturday morning. Snow with periods of mixed rain can be expected to continue through the weekend. The pattern turns drier on Tuesday as the next ridge of high pressure builds over the region.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .75 Snow equivalent = 0

Total inches of water by noon tomorrow = 1-1.5
Total inches of snow by noon tomorrow = 0

Trend and Timing:
The rain will intensify during the next 24hrs with heavy rain expected tomorrow. Periods of mixed snow and rain will be possible tomorrow on the upper mountain.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 36 High: 48
Freezing level: +-5000’

Trend and Timing:
Freezing levels will remain around 5000’ until tomorrow night or early Saturday morning.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 SW
Ridge Top: 10-15 SW

Trend and Timing:
Winds will shift SW and strengthen later today. It will be possible to get some higher winds along the upper ridges tonight.





J.Meriwether

April 3, 2013

8:00am Start Time for Thurs. April 4th, 2013

Mountain Weather Forecast -Time: 0930

 It was courteous of the sun to burn off the morning fog so quickly. Enjoy the sun today because a strong frontal system will bring rain to the mountains tomorrow and Friday.

Long-range: A vigorous weather system will drive several fronts through the PNW starting tomorrow. Light rain can be expected tomorrow afternoon with moderate to heavy rain on Friday. Cooler air arrives Friday with a mixed rain and snow game setting up for the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = 0

Total inches of water by noon tomorrow = <.25
Total inches of snow by noon tomorrow = 0

Trend and Timing:
The first wave of precipitation is expected to reach the mountains after 12pm tomorrow. Rain will intensify over night.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 32 High: 50
Freezing level: +6000’

Trend and Timing:
The sun will push surface temperatures to near 50 today. Freezing levels will remain well above 5000’ through Friday.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 W shifting SE
Ridge Top: 0-10 W shifting SE

Trend and Timing:
Strengthening south east flow aloft will develop overnight.



J.Meriwether

April 2, 2013

Start Time Wednesday---8am

Mountain Weather Forecast -Time: 0915

 These soupy conditions will continue today as the thick marine air nestles up against the western slopes of the Cascades. A weak high pressure ridge passing over the mountains will provide a bit more sunshine tomorrow.

Long-range: The first of several frontal systems arrive on Thursday. Expect rain on Thursday and Friday with a wet rain/snow mixture over the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = <.25 Snow equivalent = 0

Total inches of water by noon tomorrow =.25
Total inches of snow by noon tomorrow = 0

Trend and Timing:
Light drizzly rain with a few sun breaks will be possible today and tonight. Tomorrow will be mostly dry.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 34 High: 48
Freezing level: +5000’

Trend and Timing:
Mild temperature will continue through the end of the week.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 WNW
Ridge Top: 5-10 WNW

Trend and Timing:
Light westerlies will continue through tomorrow.



J.Meriwether

April 1, 2013

Mountain Weather Forecast -Time: 1030

Spring has arrived when the term “marine push” creeps into the conversations. A marine push will start increasing clouds later today and bring along the chance of some light rain.

Long-range: Models are starting to agree on a dynamic weather pattern starting on Thursday and lasting through the weekend. Details are fuzzy this far out, but rain can be expected on Thursday and Friday. Cooler air arrives over the weekend with rain changing to snow.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = <.25 Snow equivalent = 0

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 0

Trend and Timing:
Blue bird conditions will continue today. Thickening clouds and a chance of light rain (drizzle) will be possible late tonight and tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 32 High: 50
Freezing level: 6000’ +

Trend and Timing:
Freezing levels will remain well above 5000’ through most of the week.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 W
Ridge Top: 5-10 W

Trend and Timing:
Westerly flow will be the dominate pattern for the next 24-48 hours.





J.Meriwether

Start Time Tuesday---8am

8:00am Start for Friday 3/29/2024 No ABS

 Warm and dry weather is on the way.