Thunderstorms Convey Potent Winds, Route Closures, Too Ability Outages Over Northeast Washington
The delineate of piece of work of potent thunderstorms that hitting western Washington roughly midnight Sunday/Monday continued into eastern Washington, where some of the convection revved upwardly into intense storms. Over express areas the winds were extraordinary, gusting to good over threescore mph as well as I suspect to a greater extent than inwards some locations.
An sentiment of the intensity of some of these storms was made clear over Ferry County of northeast Washington, where extensive ability outages as well as downed trees were noted. State Route xx was unopen yesteryear a large release of fallen trees at a place nigh iv miles westward of the town of Republic (see pictures as well as place map below).
The potent winds were associated alongside a delineate of piece of work of potent thunderstorms. Let me illustrate yesteryear showing a serial of composite radar images from the Spokane radar from 1102 UTC sun (4:02 AM PDT) to 1231 UTC (5:31 AM). The maximum reflectivity (how much of the radar signal is returned to the radar) was very, really large (values reaching the mid-60s), which is associated alongside hail as well as VERY heavy precipitation.
The radar tin state us nigh the top of the radar echo (see below), which reached around
40,000 feet---which is really high for our expanse (folks inwards Oklahoma would yawn at it).
So what sort of air current reports did nosotros get? The work alongside NE Washington is that observation density is sparse....but nosotros larn some suggestive reports. For example, the USDA RAWS site at Oroville, WA has a really abrupt gust to 61 mph at the fourth dimension of the convection delineate of piece of work passage.
The RAWS site at Aeneas, WA, but a few miles from the SR-20 blowdown had a gust to 64 mph.
Influenza A virus subtype H5N1 weatherunderground station inwards Republic got a slice of the activity (see plot below), alongside a surge of air current to 26 mph, accompanied yesteryear a abrupt bound of pressure level as well as a flare-up of rain.
The actually potent winds early on Mon morn were localized over the Republic expanse of NE Washington. The max air current gusts overnight inwards the regional plot showed lots of blustery conditions (winds gusting to 20-35 mph), lay piffling testify of a major expanse of greater 50 mph.
So what happened roughly Republic? There is no argue to suspect a tornado, especially since the potent winds appeared to occur over a portion of roughly 10 miles inwards size.
Strong thunderstorms tin make potent "straight line" winds fifty-fifty without a tornado vortex. For example, powerful thunderstorms tin accept potent gust fronts of descending natural springtime air, alongside air current speeds reaching 40-80 mph. Dry air nether the thunderstorm air tin aid inwards producing a strong
gust front, as well as the vertical radiosonde sounding at Spokane Airport for five AM, did demonstrate a low-level dry out layer (see below, temperatures inwards cherry-red as well as dew indicate inwards blue, the to a greater extent than they are separated, the drier the air). Dry air encourages evaporation as well as cooling, alongside cooler/denser air sinking to a greater extent than speedily earlier it spreads out along the ground. Strong downdrafts tin likewise mix higher momentum air from aloft downwards to the surface.
An odd termination alongside potent thunderstorms on both sides of the Cascades.
An sentiment of the intensity of some of these storms was made clear over Ferry County of northeast Washington, where extensive ability outages as well as downed trees were noted. State Route xx was unopen yesteryear a large release of fallen trees at a place nigh iv miles westward of the town of Republic (see pictures as well as place map below).
Picture Courtesy of Andy of TroutStreaming
The radar tin state us nigh the top of the radar echo (see below), which reached around
40,000 feet---which is really high for our expanse (folks inwards Oklahoma would yawn at it).
So what sort of air current reports did nosotros get? The work alongside NE Washington is that observation density is sparse....but nosotros larn some suggestive reports. For example, the USDA RAWS site at Oroville, WA has a really abrupt gust to 61 mph at the fourth dimension of the convection delineate of piece of work passage.
The RAWS site at Aeneas, WA, but a few miles from the SR-20 blowdown had a gust to 64 mph.
Influenza A virus subtype H5N1 weatherunderground station inwards Republic got a slice of the activity (see plot below), alongside a surge of air current to 26 mph, accompanied yesteryear a abrupt bound of pressure level as well as a flare-up of rain.
The actually potent winds early on Mon morn were localized over the Republic expanse of NE Washington. The max air current gusts overnight inwards the regional plot showed lots of blustery conditions (winds gusting to 20-35 mph), lay piffling testify of a major expanse of greater 50 mph.
So what happened roughly Republic? There is no argue to suspect a tornado, especially since the potent winds appeared to occur over a portion of roughly 10 miles inwards size.
Strong thunderstorms tin make potent "straight line" winds fifty-fifty without a tornado vortex. For example, powerful thunderstorms tin accept potent gust fronts of descending natural springtime air, alongside air current speeds reaching 40-80 mph. Dry air nether the thunderstorm air tin aid inwards producing a strong
gust front, as well as the vertical radiosonde sounding at Spokane Airport for five AM, did demonstrate a low-level dry out layer (see below, temperatures inwards cherry-red as well as dew indicate inwards blue, the to a greater extent than they are separated, the drier the air). Dry air encourages evaporation as well as cooling, alongside cooler/denser air sinking to a greater extent than speedily earlier it spreads out along the ground. Strong downdrafts tin likewise mix higher momentum air from aloft downwards to the surface.
An odd termination alongside potent thunderstorms on both sides of the Cascades.
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