Scattered thunderstorms tracking from Northeastern Oregon moved through the Lewiston Area during the evening of June 2nd. On an isolated basis, outflow from a collapsing thunderstorm delivered wind gusts near 60 mph to the Lewiston Area.
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The episode as NWS OTX wrote it up.
Scattered thunderstorms tracking from Northeastern Oregon moved through the Lewiston Area during the evening of June 2nd. On an isolated basis, outflow from a collapsing thunderstorm delivered wind gusts near 60 mph to the Lewiston Area. No damage was reported with these storms.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Spokane, WA wrote its last area forecast discussion before the first event at Jun 2, 3:35 PM PST, 2 hours 31 minutes earlier.
Area Forecast Discussion National Weather Service Spokane WA 435 PM PDT MON JUN 2 2014 .SYNOPSIS... Scattered showers and thunderstorms are expected across the southeast tonight with isolated showers across much of the rest of the region. The arrival of a cold front on Tuesday will bring a good chance of showers and thunderstorms to northeast Washington and north Idaho. Breezy conditions are also expected through the Cascade gaps into the Columbia Basin behind the front. The remainder of the week will bring mainly dry conditions and near normal temperatures. && .DISCUSSION... Tonight and Tuesday: An upper level trough of lower pressure is parked out over southern BC and over the Northern Panhandle over into the northern WA Cascades. There is a -18 C cold pool draped across this area and is responsible for the instability producing scattered showers across the northern mtns this afternoon. Out ahead of this trough is a Theta E ridge at low to mid levels across eastern OR into extreme southeastern WA and the central ID Panhandle. This axis of elevated instability is where we are seeing quite a bit of ACCAS forming this afternoon. Further upstream is a slightly stronger shortwave disturbance beginning to swing into northern BC. This wave will nudge the energy to the northwest a bit further east this evening into tonight and eventually morph together and swing across the region on Tuesday. This process should provide just enough lift to get some elevated convection going across northeast OR over the Blue Mtns, which will then drift northeastward along the Theta E ridge for the evening hours. This is where we should see the best chances for scattered thunderstorms. Thunderstorms across the northern mtns zones will likely be more isolated in nature for this evening. There will be enough elevated instability tonight that we should see at least isolated showers across much of the region. Tuesday afternoon looks to be an active day with scattered thunderstorms possible across extreme eastern WA and in the ID Panhandle. Convection looks to begin as early as the late morning and then intensify into the afternoon hours. The 0-6 km shear will be weak of only about 20-25 kts; however, surface based CAPE values will be up around 500-1000 J/KG. This should be enough instability to make up for some of the deficiencies in a low shear environment. We could be looking at a few storms pulse up very quickly, but then die off just as quickly without the necessary shear to sustain the thunderstorms. Small hail, heavy downpours and gusty out flow winds will all be possible, mainly in the Panhandle. A good cross Cascade gradient with a cold front passage will also result in breezy winds through the Cascade gaps and out into the western basin. Sustained wind speeds of around 20 mph with gusts up to 30 mph will be possible, especially for the Wenatchee Area and Waterville Plateau. /SVH Tuesday night through Saturday morning...Moisture and instability will linger over the northeast and eastern zones Tuesday evening for continued showers and embedded thunderstorms through about midnight. Otherwise much drier air will move in behind the front. This will stabilize the atmosphere for a drying trend from west to east through the night. A bigger challenge will be breezy/gusty winds behind the front. Southwest to west winds will remain elevated through a majority of the night with gusts 20-30 mph. Another quick moving short wave will track through central B.C. Wednesday night. The best forcing and instability will stay north of our forecast area. But there will be a chance for some mountain showers across the northeast WA and north Idaho Panhandle Wednesday afternoon and early in the evening. Southwest-west winds will remain somewhat elevated and gusty but much less so then Tuesday afternoon/evening. Thursday through Saturday morning the flow will stay northwest as high pressure begins to strengthen in the eastern Pacific. A couple of weak disturbances are showing up in the model guidance. But with little moisture to work with the most likely scenario will be some afternoon and evening showers across the northeast zones on Friday...otherwise just some cumulus build ups through the afternoon. Temperatures through the forecast period will be in the 70s and low 80s and just on the warm side of normal. Tobin Saturday through Monday: The weekend starts with weak ridging on Saturday providing mostly dry conditions minus the chance for a stray shower in the far eastern Panhandle. From Saturday evening on is where significant changes have occurred in recent model runs. What originally was thought to be continued ridging quickly changed to a well defined area of low pressure dropping down from the Gulf of Alaska. The 06Z and 12Z GFS along with the 00Z Euro would have led to higher POPs for much of northern WA and north ID as the track of the low was directly through these areas. Then came the 12Z Euro keeping the track further north in BC and not having as much moisture making it into the area. Based on this I did bump up POPs slightly for the northern zones Sunday afternoon/evening mainly for the higher terrain. Enough instability will likely be present due to daytime heating and the proximity of the cold core aloft for showers and some weak thunderstorms. Overall the current confidence level in the extended is rather low as models are not in good agreement at all. The main noticeable feature I am confident about would be an increase in the winds for the later part of the weekend due to a tightened gradient from the passing low. Temperatures are a tough call due to differing model resolutions, but for now I kept them at or slightly above normal due to persistence. As models come into better agreement, the timing and impacts will be better resolved. /Fliehman && .AVIATION... 00Z TAFS: An area of low pressure draped over the northern mtns will produce scattered showers with embedded thunderstorms this afternoon. These showers will remain north and east of the TAF sites, but may begin to build into KGEG, KSFF, KCOE and KEAT this evening. Another area of focus for convection will be over the Blue Mountains and into extreme southwest WA and the central ID Panhandle. This convection is expected to produce some thunderstorms in the vicinity of KLWS and possibly into KPUW. The low pressure system will push across the region overnight with elevated showers continuing over much of the region. Convective showers will develop again Tuesday afternoon with thunderstorms possible for extreme eastern WA and north Idaho. /EK && .PRELIMINARY POINT TEMPS/POPS... Spokane 55 77 52 76 48 72 / 20 40 30 0 0 0 Coeur d'Alene 52 74 49 75 45 71 / 20 50 30 10 10 0 Pullman 51 75 46 75 45 70 / 30 20 20 0 0 0 Lewiston 57 83 54 83 53 78 / 30 20 10 0 0 0 Colville 49 76 48 75 45 72 / 30 50 30 10 10 10 Sandpoint 47 72 47 73 44 70 / 20 60 50 20 10 10 Kellogg 51 72 48 73 46 69 / 20 60 40 10 10 10 Moses Lake 55 85 53 85 52 80 / 10 10 10 0 0 0 Wenatchee 60 83 59 83 55 81 / 20 0 0 0 0 0 Omak 52 82 51 81 48 77 / 20 10 10 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPOKANE WA 551 AM PDT MON JUN 2 2014 IDZ001>004-026-027-WAZ031>038-041>044-031300- NORTHERN PANHANDLE-COEUR D'ALENE AREA-IDAHO PALOUSE- CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA- LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS- LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE- MOSES LAKE AREA-UPPER COLUMBIA BASIN-SPOKANE AREA- NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-WENATCHEE AREA- EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-WATERVILLE PLATEAU- 551 AM PDT MON JUN 2 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO... NORTH CENTRAL IDAHO...CENTRAL WASHINGTON...EAST CENTRAL WASHINGTON...NORTH CENTRAL WASHINGTON...NORTHEAST WASHINGTON AND SOUTHEAST WASHINGTON. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
527 PM PDT MON JUN 2 2014
IDZ003-004-026-027-030115-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES ID-
CENTRAL PANHANDLE MOUNTAINS ID-LEWISTON AREA ID-IDAHO PALOUSE ID-
527 PM PDT MON JUN 2 2014
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL LATAH AND NORTHERN
NEZ PERCE COUNTIES UNTIL 615 PM PDT...
AT 525 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A STRONG
THUNDERSTORM NEAR LEWISTON WITH VERY HEAVY RAIN...SMALL
HAIL AND WIND GUSTS TO 50 MPH...MOVING NORTHEAST AT 25 MPH.
DIME SIZE HAIL...HEAVY RAIN AND WIND GUSTS UP TO 50 MPH WILL BE
POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
LEWISTON...LAPWAI...JULIAETTA...KENDRICK...LENORE...SOUTHWICK AND
SPALDING.
LAT...LON 4630 11687 4642 11701 4674 11660 4662 11645
4650 11645
TIME...MOT...LOC 0025Z 230DEG 21KT 4643 11685
EKThe Spokane radar (KOTX), 154 km away, was scanning. The volume nearest the first event began at 02:07 UTC.
1 thunderstorm wind. Local standard time, as filed.
Lewiston ASOS measured a peak gust of 62 mph. Lewiston Tribune reported that the Lewiston Orchards experienced some minor flooding of roads and residential areas and some limbs were blown down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2014Every state in 2014This day in weather historyWarnings in Idaho, June 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 531983.