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About tamarack

- Currently Viewing Topic: Significant Severe Weather Event Possible for NNE on July 14 into July 15, 2026
- Birthday 03/10/1946
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New Sharon, Maine
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Family, church, forestry, weather, hunting/fishing, gardening
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Forgot this thread and posted the info below on the Ju-ply one: Afternoon AFD from GYX. Tomorrow evening might get interesting. Our place is on/near the boundary between levels 2/5 and 3/5. I can't recall ever being in a 3/5 area. Now to the increasing threat for severe weather, which again could be potentially significant. An Enhanced Risk (Level 3/5) of Severe Weather is in place for northern NH and the western ME mountains,a Slight Risk (Level 2/5) for central NH and the Maine interior, and a Marginal Risk (Level 1/5) for coastal ME and approaching southern NH. A potent 500mb shortwave will cross Quebec in the afternoon and evening, with its associated cold front approaching the International Border from the northwest early Tuesday evening. Increasing forced ascent, significant height falls, and strengthening wind fields aloft will set the stage for severe thunderstorms to develop with the hot and humid air mass in place, further enhanced by an elevated mixed layer that will steepen lapse rates aloft. Today`s 12Z model suite, including CAMs, continue to show deep layer shear of 50-60 kt, MUCAPE in the 2000-2500 J/kg range, and high values of DCAPE (800-1000 J/kg) brought on by some dry air/high dewpoint depressions in the low levels. This supports damaging wind gusts, and given the parameters, there`s certainly potential for these to be significant on the order of 75+ mph. In addition, the instability profiles and steep mid-level lapse rates on forecast soundings depict large hail could be to the size of golf balls or even larger. There is also enough directional shear to support a tornado threat with mean 0-1km SRH of 100-200 m^2/s^2. These hazards are all possible within discrete or semi-discrete storm mode, but the primary hazard will become damaging winds when the dominant mode becomes more linear, although a tornado within the line(s) will remain possible. For timing: there`s strong consensus among the CAMs with multiple clusters or semi-discrete developing across southern Quebec in the late afternoon to early evening with rapid upscale growth in coverage and intensity as storms approach northern NH and northwestern ME in the 6pm to 8pm time frame. Storms are expected to quickly progress to the south the rest of the evening into the early overnight hours. However, it should be noted there are hints of isolated discrete cells developing in the 4pm to 6pm timeframe that may approach from the north. Based on CAM solutions, the threat for severe weather should diminish after 2 AM, but some development of showers and a few storms is possible overnight. This is not a yearly, typical threat of severe storms, and it becomes even more dangerous as the threat continues after dark. It is highly advised to have multiple ways to receive warnings, especially ones that will wake you up with the threat continuing into the late evening and early overnight hours. The highest risk areas also include many popular camping and recreation areas, which make those who are outdoors extremely vulnerable to falling trees.
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Afternoon AFD from GYX. Tomorrow evening might get interesting. Our place is on/near the boundary between levels 2/5 and 3/5. I can't recall ever being in a 3/5 area. Now to the increasing threat for severe weather, which again could be potentially significant. An Enhanced Risk (Level 3/5) of Severe Weather is in place for northern NH and the western ME mountains,a Slight Risk (Level 2/5) for central NH and the Maine interior, and a Marginal Risk (Level 1/5) for coastal ME and approaching southern NH. A potent 500mb shortwave will cross Quebec in the afternoon and evening, with its associated cold front approaching the International Border from the northwest early Tuesday evening. Increasing forced ascent, significant height falls, and strengthening wind fields aloft will set the stage for severe thunderstorms to develop with the hot and humid air mass in place, further enhanced by an elevated mixed layer that will steepen lapse rates aloft. Today`s 12Z model suite, including CAMs, continue to show deep layer shear of 50-60 kt, MUCAPE in the 2000-2500 J/kg range, and high values of DCAPE (800-1000 J/kg) brought on by some dry air/high dewpoint depressions in the low levels. This supports damaging wind gusts, and given the parameters, there`s certainly potential for these to be significant on the order of 75+ mph. In addition, the instability profiles and steep mid-level lapse rates on forecast soundings depict large hail could be to the size of golf balls or even larger. There is also enough directional shear to support a tornado threat with mean 0-1km SRH of 100-200 m^2/s^2. These hazards are all possible within discrete or semi-discrete storm mode, but the primary hazard will become damaging winds when the dominant mode becomes more linear, although a tornado within the line(s) will remain possible. For timing: there`s strong consensus among the CAMs with multiple clusters or semi-discrete developing across southern Quebec in the late afternoon to early evening with rapid upscale growth in coverage and intensity as storms approach northern NH and northwestern ME in the 6pm to 8pm time frame. Storms are expected to quickly progress to the south the rest of the evening into the early overnight hours. However, it should be noted there are hints of isolated discrete cells developing in the 4pm to 6pm timeframe that may approach from the north. Based on CAM solutions, the threat for severe weather should diminish after 2 AM, but some development of showers and a few storms is possible overnight. This is not a yearly, typical threat of severe storms, and it becomes even more dangerous as the threat continues after dark. It is highly advised to have multiple ways to receive warnings, especially ones that will wake you up with the threat continuing into the late evening and early overnight hours. The highest risk areas also include many popular camping and recreation areas, which make those who are outdoors extremely vulnerable to falling trees.
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Aroostook has seen a surprising number of tornados, considering it is far north and hilly. The densest area for wind damage (tornado and straight line) seems to be the Fish River chain of lakes, Eagle, Square, Long. In this century there have been damaging wind events - including tornados - from Oxbow to the town of Eagle Lake. Public Lands had loggers salvage 1,900 cords from 60 acres south of Eagle Lake in 2005 and 3,000 acres in 2013 from a 200+-acre blowdown north of the lake. The granddaddy event was older, 600 acres Eagle to Square Lakes flattened by straight line wind on 9/30/1986. The Bureau salvaged about 3,000 cords from 300 acres (not all were reached) and J.D. Irving salvaged at least as much on their half of the blowdown.
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Beats my longest - 6 days from the Jan 1953 ice storm on the hills north and west from NYC. 2nd place is 101 hours from the Dec 18, 2023 gales/flood and 3rd was 90 hours in Jan 1998. We were fortunate in that last one - a single break between Brunswick Avenue and our place 400' away would've meant 2 weeks. (Our phone was out for 13 days.)
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Memories of sweating while doing brush saw thinning north of Flagstaff Lake that summer. June had one hot spell, but the 6 weeks July 4 thru mid-August had some of the highest dews I've encountered in Maine. The 8/1-14 stretch of swamp-dews put mold all over things in our basement, only time I've seen that. IIRC, PWM had a 77° TD during that spell and a site in BGR (don't know where) reported 93° and 68% RH one afternoon, which would be a TD of about 81.
