Slow moving thunderstorms produced significant rainfall over North Idaho on Thursday May 28, 2015.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OTX wrote it up.
Slow moving thunderstorms produced significant rainfall over North Idaho on Thursday May 28, 2015.
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 May 28, 3:35 PM PST, 3 hours 10 minutes earlier.
Area Forecast Discussion National Weather Service Spokane WA 435 PM PDT THU MAY 28 2015 .SYNOPSIS... Scattered afternoon showers and thunderstorms will continue this evening and Friday. However they will be more focused around the mountains. Expect a warming trend into the weekend, with highs in the 80s, with a lingering threat of mainly mountain showers and thunderstorms. By next Monday and Tuesday the next best chance of showers and thunderstorms arrives, with the potential for some stronger storms and the return of cooler temperatures. && .DISCUSSION... Tonight...The satellite loop indicates the forecast area is in a dynamically null weak ridge between the exiting upper low visible over Wyoming and Montana and another upper low slowly descending out of British Columbia. Despite lack of upper level energy the air mass remains moist and as the peak afternoon surface heating period occurs a "Ring of Fire" pattern is developing with showers and thunderstorms pulsing over the mountains surrounding the Columbia Basin. While tightly confined to ridges and peaks due to the lack of any dynamic forcing...there is a small chance some of these storms could wander off of the mountains and over adjacent valleys late this afternoon and early evening before collapsing. Brief heavy rain is possible in these collapsing cores and thus the main threat for the next few hours will be flash flooding or debris flows on the Cascade Burn scars. However the chance of a beefy storm maintaining it's integrity as it moves off of the peaks is very small and thus this risk is not great enough to warrant any Flash Flood Watches. As the sun sets tonight the lion's share of these storms will die out...however there is a weak short wave...barely visible on satellite generating an area of cirrus over BC just east of Vancouver Isle...that will transit the forecast area overnight tonight. Model soundings suggest there will remain a ribbon of elevated instability through tonight across the northern tier zones so the complete extinction of showers and thunderstorms may not occur with the loss of solar heating tonight. A chance of showers and brief elevated thunderstorm or two is warranted across the mountains of north of the basin near the Canadian Border through the night. Otherwise conditions across the remainder of the region will be mostly clear and benign with rather mild overnight lows as a surface thermal trough remains established over the region. /Fugazzi Sunday through Thursday...An upper level trough will move through the region, bringing showers and thunderstorms to the Inland Northwest starting Sunday evening. The threat will continue through at least Wednesday as the trough will be slow to exit the area. The first area to come under the threat of thunderstorms will be the southeast zones as moist southwest flow allows a mid level theta-e ridge to expand across the region Sunday evening. There will be ample mid level instability and a possible short wave kicker as the approaching trough directs this energy into the forecast area. This will keep thunderstorms going during the overnight period into Monday morning. Decent shear and CAPE values will allow some storms to become organized with heavy rain, hail and strong outflow winds possible impacts. Once the upper low settles in overhead late Monday, we will see more general showers and thunderstorms fed by diurnal heating and mainly tied to the higher elevations around the periphery of the forecast area until the low finally moves out of the region later in the week. Daytime temperatures will be on a significant cooling trend from Sunday to Monday as the region comes under the influence of the upper low with associated clouds and precipitation. Expect widespread 80s on Sunday to be replaced by 70s for the first half of the work week. /Kelch && .AVIATION...00Z TAFS: General low pressure with weak weather disturbances moving through it keep scattered showers and thunderstorms in the aviation area this evening. There should be some decrease overnight but no real ending of convection in the area. Daytime heating tomorrow after 21Z should allow for an increase in the shower and thunderstorm activity not too dissimilar to what occurred today. /Pelatti && .PRELIMINARY POINT TEMPS/POPS... Spokane 55 82 59 83 59 82 / 10 10 20 10 10 10 Coeur d'Alene 52 82 57 82 56 82 / 10 10 20 20 10 10 Pullman 50 81 58 81 57 81 / 10 10 20 20 10 30 Lewiston 56 88 64 88 62 89 / 10 10 20 20 20 40 Colville 54 83 55 84 54 85 / 40 40 40 20 20 10 Sandpoint 50 81 53 81 53 81 / 40 20 30 30 20 10 Kellogg 48 81 55 80 54 81 / 40 10 30 40 20 30 Moses Lake 58 89 59 90 58 91 / 10 0 10 10 10 10 Wenatchee 63 88 61 89 60 89 / 10 10 10 10 10 10 Omak 57 87 54 90 53 89 / 20 20 20 10 10 10 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KOTX 632 AM PDT THU MAY 28 2015 IDZ002>004-026-027-WAZ031>036-041>044-291345- 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-WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES- OKANOGAN VALLEY-WATERVILLE PLATEAU- 632 AM PDT THU MAY 28 2015 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...FRIDAY THROUGH WEDNESDAY A low pressure system will move in over the region early next week. This weather system will result in afternoon and evening thunderstorms across much of the region. The main threat from these storms will be heavy rain...although lightning with small hail and gusty winds are additional concerns. This may result in localized flooding of low lying and urbanized areas. Heavy rain from thunderstorms will also increase the risk of flash flooding or debris flows, especially for areas located in steep terrain. IDZ001-WAZ037-038-291345- NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- 632 AM PDT THU MAY 28 2015 This Hazardous Weather Outlook is for portions of North Idaho... North Central Washington and Northeast Washington. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY There is a small potential for a few stronger thunderstorms to develop Friday afternoon and mainly for communities closer to the Canadian border. Thunderstorms will be capable of producing heavy downpours, small hail and gusty winds up to 30-40 mph. A low pressure system will move in over the region early next week. This weather system will result in afternoon and evening thunderstorms across much of the region. The main threat from these storms will be heavy rain...although lightning with small hail and gusty winds are additional concerns. This may result in localized flooding of low lying and urbanized areas. Heavy rain from thunderstorms will also increase the risk of flash flooding or debris flows, especially for areas located in steep terrain.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 307 PM PDT THU MAY 28 2015 IDZ001-282230- NORTHERN PANHANDLE ID- 307 PM PDT THU MAY 28 2015 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL BOUNDARY COUNTY UNTIL 330 PM PDT... AT 307 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR MOYIE SPRINGS...OR 8 MILES NORTHEAST OF BONNERS FERRY. THIS STORM WAS NEARLY STATIONARY. DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... MOYIE SPRINGS...MEADOW CREEK CAMPGROUND AND MEADOW CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4886 11628 4882 11611 4872 11613 4873 11632 TIME...MOT...LOC 2207Z 021DEG 3KT 4879 11622 SB
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
634 PM PDT THU MAY 28 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM FLASH FLOOD 10 SSW TWISP 48.23N 120.20W
05/28/2015 OKANOGAN WA EMERGENCY MNGR
EMERGENCY MANAGER REPORTED RAPID RISE ON TEXAS CREEK
WHICH CAUSED RESIDENTS OF A HOUSE TO MOVE TO THE ROOF OF
THE HOUSE.
&&
GKOCHSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 714 PM PDT THU MAY 28 2015 IDZ002>004-WAZ033-036-290300- IDAHO PALOUSE ID-COEUR D'ALENE AREA ID- CENTRAL PANHANDLE MOUNTAINS ID-WASHINGTON PALOUSE WA-SPOKANE AREA WA- 714 PM PDT THU MAY 28 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BENEWAH... SOUTHWESTERN KOOTENAI AND EAST CENTRAL SPOKANE COUNTIES UNTIL 800 PM PDT... AT 713 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES SOUTH OF LIBERTY LAKE...OR 15 MILES SOUTH OF POST FALLS... MOVING SOUTHEAST AT 15 MPH. DIME SIZE HAIL...HEAVY DOWNPOURS...AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PLUMMER...HARRISON...PARKLINE...ROCKFORD...WORLEY AND CHATCOLET. LAT...LON 4750 11720 4761 11699 4736 11663 4720 11694 TIME...MOT...LOC 0213Z 322DEG 13KT 4750 11704 RP
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A trained spotter reported Shallow water from heavy rain over the road of Highway 41 and I-90 which is approximately 3 miles east of Post Falls, Idaho.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2015Every state in 2015This day in weather historyWarnings in Idaho, May 2015
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: 568681.