1 thunderstorm wind, as filed by the National Weather Service.
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 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 Aug 5, 1:30 PM PST, 4 hours 30 minutes earlier.
EASTERN WASHINGTON AND NORTH IDAHO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPOKANE WASHINGTON 230 PM PDT TUE AUG 5 2003 .SYNOPSIS...A TROF OR AREA OF LOW PRESSURE WILL REMAIN OFF THE COAST AND ALLOW SMALL WEATHER DISTURBANCES TO ROTATE AROUND IT AND THROUGH EASTERN WASHINGTON AND NORTHERN IDAHO OVER THE NEXT SEVERAL DAYS. .DISCUSSION... .TONIGHT THROUGH FRIDAY...AS PER MOST SHORT TERM MODELS AND LATEST RADAR AND SATELLITE IMAGERY CONTINUE TO KEEP THE HIGHEST POPS FOR CONVECTION TONIGHT. THIS IS DUE TO A SHORTWAVE GETTING KICKED NORTHWARD THROUGH THE PACIFIC NORTHWEST ON THE EAST SIDE OF AN OFFSHORE TROF. THE SMALL WAVE HAS A NEGATIVE TILT TO IT WHICH WOULD MAKE IT WORTHY OF THE HIGH CHANCE POPS AS THESE SORT OF SUMMER SHORTWAVES TYPICALLY PRODUCE NOISY PRECIPITATION...I.E... THUNDERSTORMS. LAPSE RATES OVERNIGHT CONTINUE WITH AT OR SLIGHTLY GREATER THAN 7 C/KM FROM 700MB UP TO 500MB...THUS THE DYNAMICS OF THIS TIGHT SHORTWAVE COULD SUPPORT NIGHTTIME ELEVATED CONVECTION WHEN WE LOSE DAYTIME HEATING. AFTER TONIGHTS WAVE MOVES THROUGH IT APPEARS THAT THE OFFSHORE TROF CUTS OFF AND FORMS AN OFFSHORE UPPER LEVEL LOW OFF THE OREGON AND WASHINGTON COAST. MORE SMALL SHORTWAVES ARE PROGGED TO ROTATE AROUND THIS OFFSHORE LOW AND MOVE NORTHWARD THROUGH EASTERN WASHINGTON AND NORTHERN IDAHO WITH THE HIGHEST POPS ON THE PERIPHERY OF THE RAIN-SHADOWED BASIN WEDNESDAY...WEDNESDAY NIGHT...AND THURSDAY. ON FRIDAY AS PER 12Z GFS THE OFFSHORE LOW SHOWS SOME TYPE OF ELONGATED TROF AXIS EXTENDING FROM IT WHICH MOVES THROUGH EASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE THURSDAY NIGHT INTO FRIDAY. THIS DISTURBANCE MIGHT BE HARD TO PICK UP TO SOME BUT CAN BE SEEN BETTER BY LOOPING THE 500MB HEIGHTS AND VORTICITY FIELDS AT A MODERATE SPEED. GFS PROG OF KOTX SOUNDING FOR THURSDAY NIGHT INTO FRIDAY RANGE FROM 0.86 INCHES UP TO 0.94 INCHES WHICH WOULD BE BETWEEN 150% AND 160% OF AVERAGE FOR THIS TIME OF THE YEAR. SO TONIGHT STILL LOOKS THE WETTEST...WHILE THE REMAINDER OF THE SHORT TERM FORECAST THROUGH FRIDAY HOLDS ON TO SOME SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS MANTRA...WITH THE MOST SIGNIFICANT SLIGHT CHANCE...IF THAT COULD BE MEASURED DIRECTLY...WOULD BE THURSDAY NIGHT INTO FRIDAY. PELATTI .SATURDAY THROUGH TUESDAY...UPPER LEVEL TROUGH OVER THE PACIFIC WILL STAY IN PLACE FOR MUCH OF THE WEEKEND. MOIST SOUTHWESTERLY FLOW WILL RESULT OVER ALL THE THE CWA. HOWEVER...NOT MUCH IN THE PRECIPITATION CHANCES AS THE TROUGH OFF THE COAST INDUCES A HIGH PRESSURE RIDGE OVER WESTERN MONTANA. WE WILL BENIFIT FROM THE RIDGE AS IT HELP KEEP THE DYNAMICS UNFAVORABLE FOR CONVECTION. MONDAY THE PATTERN STARTS TO PROGRESS EASTWARD. MODELS INDICATE THE UPPER LOW AND ASSOCIATED TROUGH WILL BEGIN TO TREK INLAND OVER THE PACNW. THIS WILL LIKELY YIELD A HIGHER CHANGE FOR PRECIPITATION ON BOTH MON AND TUES. MENTION OF THIS WILL LARGELY BE CONFINED TO EASTERN ZONES AND THE CASCADE CREST. /LERICOS ...THE INFORMATION IN THIS PRODUCT CONCERNING WARNINGS AND FORECASTS IS VALID ONLY AT THE TIME OF ISSUANCE. THE LATEST WARNING AND FORECAST INFORMATION WILL BE FOUND IN THE APPROPRIATE PRODUCTS... GEG 059/083/057/085/058/085 522-12 COE 056/083/055/083/055/084 522112 PUW 057/082/055/083/055/083 522-22 LWS 064/087/056/090/059/091 422122 CQV 056/089/057/090/055/088 322222 SPT 058/084/057/084/053/085 532222 WWP 059/082/054/083/053/083 532221 MWH 062/085/059/085/060/086 3--022 EAT 065/085/059/086/061/085 3---22 OMK 060/086/055/086/059/088 322-12 .OTX...RED FLAG WARNING CONTINUES THIS AFTERNOON AND EVENING FOR FIRE WEATHER ZONES 680...676...677...682...685...684...AND 687. THIS WOULD BE THE ALL OF THE EAST WASHINGTON CASCADE FIRE WEATHER ZONES...AND THE METHOW/OKANOGAN VALLEYS...AND THE OKANOGAN HIGHLANDS FIRE WEATHER ZONES.
IDZ001>004-026-027-WAZ031>038-041>044-061330- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPOKANE WA 855 AM PDT TUE AUG 5 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WASHINGTON AND NORTH IDAHO .DAY ONE... TODAY A LOW JUST OFF THE NORTHERN CALIFORNIA COAST WILL MOVE NORTHEAST ACROSS THE REGION TODAY AND TRIGGER SCATTERED THUNDERSTORMS ACROSS EASTERN WASHINGTON AND NORTH IDAHO. SOME OF THESE STORMS MAY BECOME SEVERE WITH STRONG WINDS...HAIL...HEAVY RAIN AND FREQUENT LIGHTNING. AS THE STORMS MOVE INTO THE CASCADES AND OKANOGAN REGION TODAY... THERE IS THREAT OF LIGHTNING WITH LITTLE PRECIPITATION WITH THE STORMS. A RED FLAG WARNING FOR DRY LIGHTNING HAS BEEN ISSUED FOR THE ALL CASCADE AND OKANOGAN DISTRICTS FOR THE AFTERNOON AND EVENING. THIS INCLUDES FIRE WEATHER ZONES...676 ...677 ...680 ...682 ...684... 685... 686. SEE SEARFWOTX OR WWUS86 KOTX RFWOTX FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Seattle radar (KATX), 174 km away, was scanning. The volume nearest the first event began at 02:00 UTC.
1 thunderstorm wind. Local standard time, as filed.
Scattered thunderstorms over the east slopes of the Cascade Mountains produced gusty winds. A gust from a thunderstorm was measured at 44 mph. This wind gust damaged the roof of a home sun room addition.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2003Every state in 2003This day in weather historyWarnings in Washington, August 2003
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: 5333930.