A southerly flow of moisture into the Intermountain West along with daytime temperatures near 100 degrees for many locations provided the needed energy for strong to severe thunderstorm development across parts of Southwest Idaho.
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 BOI wrote it up.
A southerly flow of moisture into the Intermountain West along with daytime temperatures near 100 degrees for many locations provided the needed energy for strong to severe thunderstorm development across parts of Southwest Idaho.
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 Boise, ID wrote its last area forecast discussion before the first event at Jun 28, 1:54 PM MST, 5 hours 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 254 PM MDT MON JUN 28 2010 .SHORT TERM...TONIGHT THROUGH WEDNESDAY...SKIES STILL MOSTLY SUNNY THIS AFTERNOON BUT CU IS FORMING OVER HIGHER TERRAIN ALONG THE NEVADA BORDER...BUT NO REPORTS OF SHOWERS OR THUNDERSTORMS YET. WILL KEEP THE ISOLATED MENTION OF THUNDERSTORMS IN THE FORECAST FOR THIS EVENING OVER HIGHER TERRAIN AND ALONG THE NEVADA BORDER AS MOISTURE CONTINUES TO MOVE NORTH OUT OF NEVADA AND SURFACE HEATING HELPS WITH LIFT. ANY THUNDERSTORMS THAT DEVELOP THIS EVENING WILL BE HIGH BASED SO CAN EXPECT GUSTY WINDS WITH THUNDERSTORMS...BUT COULD SEE GUSTY WINDS FROM THE THUNDERSTORMS REACH INTO LOWER VALLEYS. UPPER LEVEL TROUGH A BIT SLOWER MOVING INTO THE REGION TUESDAY SO HAVE INCREASED MAX TEMPERATURES A DEGREE OR TWO DUE TO THE WARM SOUTHWEST FLOW AHEAD OF THE TROUGH. ALSO INCREASED POPS A BIT AND ALSO INCREASED THE AREAL COVERAGE OF THUNDERSTORMS DUE TO UNSTABLE AIRMASS ALONG WITH GOOD LIFT...LOTS OF MOISTURE AND JET DYNAMICS. ALSO ADD A MENTION OF GUSTY WINDS AND SMALL HAIL WITH THE THUNDERSTORMS FOR TUESDAY AFTERNOON. .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...A RATHER SIGNIFICANT OPEN TROUGH WILL MOVE INTO THE PACIFIC NW WEDNESDAY NIGHT AND CONTINUE SLOWLY ACROSS THE AREA THROUGH THE WEEKEND. BY FRIDAY NIGHT THE TROUGH AXIS WILL BE OVER IDAHO WITH GRADUALLY RISING HEIGHTS SATURDAY AND SUNDAY. THE FORECAST BECOMES MORE QUESTIONABLE MONDAY WHEN THE GFS BRINGS IN A SECOND RATHER DEEP TROUGH...THE ECMWF BRINGS IN A SHORT WAVE RIDGE AND MANY OTHER GFS ENSEMBLE MEMBERS HAVE A MUCH FLATTER TROUGH. WENT WITH THE FLATTER TROUGH SOLUTION AS DEPICTED IN THE ENSEMBLE MEAN. THE RESULT WILL BE A COOLING TREND THROUGH FRIDAY AND THREAT OF SHOWERS/THUNDERSTORMS MOSTLY ACROSS THE NORTH. FRIDAY AND SATURDAY WILL BE THE COOLEST DAYS WITH MOUNTAIN HIGHS IN THE UPPER 50S AND 60S AND SOUTHERN VALLEYS IN THE MID AND UPPER 70S...THEN SLIGHTLY WARMER SUNDAY AND MONDAY. SHOWER THREAT SHOULD BE LIMITED TO THE EXTREME NORTH PART OF THE FORECAST AREA SATURDAY THROUGH MONDAY. && .AVIATION...VFR THROUGH TUESDAY. MID/HIGH LEVEL MOISTURE IS MOVING FROM NV INTO SE OREGON AND SW IDAHO THIS AFTERNOON WHICH WILL CONTINUE TO ADVANCE NORTHWARD TONIGHT. ISOLATED THUNDERSTORMS ARE POSSIBLE THIS EVENING MAINLY IN SE OREGON AND SOUTH OF THE SNAKE RIVER IN SW IDAHO. MID HIGH LEVEL MOISTURE WILL INCREASE TUESDAY WITH A CHANCE OF THUNDERSTORMS ACROSS SW IDAHO. LIGHT SURFACE WINDS EXCEPT GUSTY WINDS NEAR THUNDERSTORMS. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE SHORT TERM...JA LONG TERM....JJ/BB AVIATION.....JJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 423 AM MDT MON JUN 28 2010 IDZ011-291030- WEST CENTRAL MOUNTAINS- 423 AM MDT MON JUN 28 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL IDAHO. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS WITH GUSTY WINDS ARE EXPECTED TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN CENTRAL IDAHO TUESDAY. THIS INCLUDES VALLEY COUNTY IN THE WEST CENTRAL MOUNTAINS. SEVERE THUNDERSTORMS CONTAIN DAMAGING WINDS OF AT LEAST 60 MILES PER HOUR AND...OR LARGE HAIL OF ONE INCH IN DIAMETER OR GREATER. IN ADDITION TO WWW.WEATHER.GOV/BOISE ... INFORMATION ABOUT SEVERE WEATHER POTENTIAL MAY BE OBTAINED AT WWW.SPC.NOAA.GOV WHICH IS THE NOAA NATIONAL WEATHER SERVICE STORM PREDICTION CENTER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. IDZ012>016-028>030-033-ORZ061>064-291030- LOWER TREASURE VALLEY ID-BOISE MOUNTAINS-UPPER TREASURE VALLEY- SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY-CAMAS PRAIRIE- OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY-UPPER WEISER RIVER- HARNEY COUNTY-BAKER COUNTY-MALHEUR COUNTY- LOWER TREASURE VALLEY OR- 423 AM MDT MON JUN 28 2010 /323 AM PDT MON JUN 28 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO...NORTHEAST OREGON AND SOUTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS WITH GUSTY ARE EXPECTED IN IDAHO TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
737 PM MDT MON JUN 28 2010
IDZ012-029-ORZ063-064-290230-
PAYETTE ID-CANYON ID-OWYHEE ID-MALHEUR OR-
737 PM MDT MON JUN 28 2010
THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
CENTRAL MALHEUR COUNTY IN SOUTHEAST OREGON...
WESTERN CANYON COUNTY IN SOUTHWEST IDAHO...
NORTHWESTERN OWYHEE COUNTY IN SOUTHWEST IDAHO...
AND SOUTHWESTERN PAYETTE COUNTY IN SOUTHWEST IDAHO...
UNTIL 830 PM MDT.
AT 728 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORM 14 MILES WEST OF HOMEDALE...MOVING
NORTHEAST AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
THE THUNDERSTORMS WILL BE NEAR...
OWYHEE DAM AROUND 735 PM MDT...
ADRIAN AROUND 755 PM MDT...
OWYHEE AROUND 805 PM MDT...
NYSSA AROUND 820 PM MDT.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. TAKE SHELTER INSIDE A
BUILDING OR VEHICLE WHEN THUNDERSTORMS APPROACH. LIGHTNING CAN OCCUR
15 MILES OR MORE AWAY FROM THE CENTER OF A STORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.
IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR
ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.
LAT...LON 4404 11768 4410 11722 4378 11673 4354 11667
4326 11706 4357 11735
TIME...MOT...LOC 0136Z 203DEG 24KT 4363 11718
SKARIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
741 PM MDT MON JUN 28 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0737 PM TSTM WND GST 9 E BEULAH 43.90N 117.99W
06/28/2010 M45.00 MPH MALHEUR OR MESONET
KELSEY BUTTE RAWS GUST OF 45 MPH AT 652 PM MDT.
0737 PM TSTM WND GST 5 W MARSING 43.54N 116.91W
06/28/2010 E38.00 MPH OWYHEE ID TRAINED SPOTTER
TRAINED SPOTTER ESTIMATED WIND GUSTS OF 35 TO 40 MPH.
&&
MTHIMMESPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
744 PM MDT MON JUN 28 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0744 PM TSTM WND GST 6 NNW CALDWELL 43.74N 116.72W
06/28/2010 E45.00 MPH CANYON ID NWS EMPLOYEE
&&
MTHIMMESPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
804 PM MDT MON JUN 28 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0744 PM TSTM WND GST 4 SSE UNITY 44.39N 118.14W
06/28/2010 E55.00 MPH BAKER OR TRAINED SPOTTER
TRAINED SPOTTER ESTIMATED 50 TO 60 MPH WIND GUST WITH
BRIEF HEAVY RAIN AND PEA-SIZED HAIL AT 730 PM MDT.
&&
MTHIMMESSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
805 PM MDT MON JUN 28 2010
IDZ011-012-014-033-ORZ062>064-290300-
PAYETTE ID-CANYON ID-ADA ID-BAKER OR-WASHINGTON ID-GEM ID-OWYHEE
ID-MALHEUR OR-
805 PM MDT MON JUN 28 2010
THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTHEASTERN BAKER COUNTY IN NORTHEAST OREGON...
NORTHEASTERN MALHEUR COUNTY IN SOUTHEAST OREGON...
NORTHWESTERN ADA COUNTY IN SOUTHWEST IDAHO...
CANYON COUNTY IN SOUTHWEST IDAHO...
SOUTHWESTERN GEM COUNTY IN SOUTHWEST IDAHO...
NORTHWESTERN OWYHEE COUNTY IN SOUTHWEST IDAHO...
PAYETTE COUNTY IN SOUTHWEST IDAHO...
AND WESTERN WASHINGTON COUNTY IN SOUTHWEST IDAHO...
UNTIL 900 PM MDT/800 PM PDT/.
AT 755 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES EAST OF
BROGAN TO 9 MILES SOUTH OF MARSING...AND MOVING NORTHEAST AT 30 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS 50 TO 55 MPH ARE
EXPECTED WITH THESE STORMS. BLOWING DUST REDUCING VISIBILITY TO LESS
THAN ONE MILE IS ALSO LIKELY.
THE THUNDERSTORMS WILL BE NEAR...
WILDER AROUND 800 PM MDT...
FAREWELL BEND STATE PARK...LOVE RESERVOIR...MARSING AND PARMA
AROUND 805 PM MDT...
MOORES HOLLOW...INDIAN HEAD MOUNTAIN...HUSTON AND GREENLEAF AROUND
810 PM MDT...
NOTUS AROUND 815 PM MDT.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. TAKE SHELTER INSIDE A
BUILDING OR VEHICLE WHEN THUNDERSTORMS APPROACH. LIGHTNING CAN OCCUR
15 MILES OR MORE AWAY FROM THE CENTER OF A STORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.
LAT...LON 4465 11685 4369 11623 4337 11682 4431 11743
TIME...MOT...LOC 0202Z 245DEG 24KT 4427 11726 4344 11676
SKARISPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOISE ID 810 PM MDT MON JUN 28 2010 ORZ062-290315- BAKER OR- 710 PM PDT MON JUN 28 2010 THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... CENTRAL BAKER COUNTY IN NORTHEAST OREGON... UNTIL 815 PM PDT. AT 700 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 11 MILES SOUTH OF BAKER...MOVING NORTHEAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS 50 TO 55 MPH ARE EXPECTED WITH THIS STORM. THE THUNDERSTORM WILL BE NEAR... SALISBURY...DOOLEY SUMMIT AND MASON DAM AROUND 710 PM PDT... BAKER AROUND 720 PM PDT... FLASTAFF HILL AROUND 730 PM PDT... HAINES AROUND 735 PM PDT... KEATING AROUND 745 PM PDT. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. TAKE SHELTER INSIDE A BUILDING OR VEHICLE WHEN THUNDERSTORMS APPROACH. LIGHTNING CAN OCCUR 15 MILES OR MORE AWAY FROM THE CENTER OF A STORM. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. LAT...LON 4494 11800 4494 11736 4455 11780 4464 11802 TIME...MOT...LOC 0210Z 210DEG 26KT 4468 11784 SKARI
The Boise radar (KCBX), 139 km away, was scanning. The volume nearest the first event began at 02:14 UTC.
3 thunderstorm wind. Local standard time, as filed.
Adams County Emergency Manager reported the roof was blown off of a church in Council including roof damage to other homes in the area. Also, many large trees were down along a path into the northeast part of the county.
A trained spotter near Ola reported a wind gust of 66 MPH.
Valley County Emergency Manager reported widespread damage across the county from Cascade to McCall including power lines and poles and large trees down and damage to roofs and structures.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2010Every state in 2010This day in weather historyWarnings in Idaho, June 2010
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: 242092, 242093, 242114.