Severe thunderstorms developed over parts of the Treasure Valley in Southwest Idaho on the 7th causing damage to trees and property to locations in Meridian and Boise.
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.
Severe thunderstorms developed over parts of the Treasure Valley in Southwest Idaho on the 7th causing damage to trees and property to locations in Meridian and Boise.
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 Jul 7, 1:55 PM MST, 1 hour 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 255 PM MDT THU JUL 7 2011 .SHORT TERM...TONIGHT THROUGH SATURDAY...AHEAD OF THE MAIN COLD FRONT...SCATTERED THUNDERSTORMS WITH GUSTY WINDS AND LIGHT RAINFALL EXTENDED FROM EASTERN BAKER COUNTY THROUGH MALHEUR COUNTY AT 230 PM. THE NORTHERNMOST WERE IN THE MOST FAVORABLE ENVIRONMENT AND A NEAR SEVERE CELL CROSSED BAKER CITY AND FLAGSTAFF HILL 130-200 PM MDT. SHOWERS AND THUNDERSTORMS WILL SPREAD ACROSS THE LOWER TREASURE VALLEY OF IDAHO BY AROUND 315 PM AROUND BOISE 430 OR SO AND THE LONG VALLEY AROUND 5 PM. GUSTY WINDS GENERALLY 30-45 MPH BUT LOCALLY STRONGER...AND BLOWING DUST WITH LOW VISIBILITIES ARE EXPECTED AS THE STORMS MOVE THROUGH. NEAR THE SLIGHT RISK AREA AT FLAGSTAFF HILL NEAR BAKER CITY WINDS GUSTED TO 57 MPH. THE COLD FRONT WILL PUSH FROM CENTRAL OREGON AT 2 PM THROUGH SW IDAHO THIS EVENING. A COOL UPPER TROUGH HAS PUSHED INTO THE CASCADES AND SHUNTED THE COLD FRONT INTO CENTRAL OREGON AND ISOLATED THUNDERSTORMS ARE POSSIBLE AHEAD OF THE TROUGH. TEMPERATURES WILL COOL THROUGH FRIDAY NIGHT THEN REBOUND SATURDAY AFTER THE UPPER TROUGH EXITS THE REGION. SURFACE PRESSURE GRADIENT AND AFTERNOON MIXING WILL KEEP NW WINDS GOING WITH BREEZY CONDITIONS BEHIND THE FRONT FOR A FEW HOURS...AND AGAIN FRIDAY AFTERNOON EAST OF BOISE. SATURDAY HIGH TEMPERATURES WILL REBOUND/RISE AROUND 7F TO A FEW DEGREES BELOW NORMAL AND WINDS WILL RETURN TO LIGHT. .LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A WESTERLY FLOW OF DRY AIR WILL BE OVER THE REGION THROUGH SUNDAY WITH 5H HEIGHTS SUPPORTING HIGH TEMPERATURES CLOSE TO NORMAL WHICH RANGE FROM THE UPPER 70S AND 80S IN THE MOUNTAINS TO NEAR 90 IN THE SNAKE VALLEY. MEANWHILE...AN INTENSE RIDGE OF HIGH PRESSURE ALOFT CONTINUES TO BAKE THE AREA FROM TEXAS EAST TO THE CAROLINAS. THIS PATTERN BASICALLY KEEPS THE FOUR CORNERS HIGH OUT OF ITS NORMAL JULY POSITION. THE REAL INTERESTING PART OF THE FORECAST COMES NEXT WEEK WITH OPERATIONAL MODELS IN GOOD AGREEMENT SHOWING AN ANOMALOUS TROUGH AND EVENTUALLY A CLOSED LOW OVER THE PACIFIC NORTHWEST. BY THE MIDDLE OF NEXT WEEK BOTH MODELS INDICATE THE LOW WILL MAKE SOME EASTWARD PROGRESS INLAND TOWARD OUR AREA...BUT THERE IS DEPTH DIFFERENCES TO THE ASSOCIATED TROUGH. AT THE SAME TIME...TREMENDOUS HEAT CONTINUES TO BUILD OVER THE MIDWEST AND SOUTH AS THE OVERALL CONUS PATTERN CONTINUES TO AMPLIFY. HARD TO BELIEVE IN THE MIDDLE OF JULY BUT THIS PATTERN TRANSLATES TO COOLER AND BELOW NORMAL TEMPERATURES FOR OUR FORECAST AREA. WITH THE LONG WAVE TROUGH POSITIONED ALONG THE WEST COAST...EVEN MUCH BELOW NORMAL READINGS ARE LIKELY WEST OF THE CASCADES AS FAR SOUTH AS SAN FRANCISCO. WE HAVE OPTED TO LOWER MAX TEMPERATURES NEXT WEEK BELOW NUMERICAL GUIDANCE BASED ON THE ABOVE MENTIONED PATTERN AND THIS IS CONSISTENT WITH THE LATEST CLIMATE PREDICTION CENTER FORECAST OF BELOW NORMAL TEMPERATURES THROUGH MID JULY FOR OUR REGION. WHILE REMAINING MOSTLY DRY THROUGH THE PERIOD...THERE IS THE POSSIBILITY OF DIURNAL CONVECTION EACH DAY FAVORING HIGHER TERRAIN. && .AVIATION...MOSTLY VFR BUT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGH THIS EVENING ALONG AND AHEAD OF EASTWARD MOVING COLD FRONT. LOCAL MVFR CEILINGS IN HEAVIER SHOWERS WITH GUSTY WINDS 35 TO 45 KNOTS...HAIL AND BRIEF HEAVY RAIN. CLEARING ALL AREAS BEHIND COLD FRONT AFTER 03Z IN OREGON AND BETWEEN 06Z AND 09Z IN IDAHO. WEST TO NORTHWEST SURFACE WINDS 10 TO 15 KNOTS EXCEPT GUSTY NEAR THUNDERSTORMS. MODERATE WEST WINDS ALOFT. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE SHORT TERM...VM LONG TERM....GS/CB AVIATION.....GS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 543 AM MDT THU JUL 7 2011 IDZ011-033-ORZ062-081145- WEST CENTRAL MOUNTAINS-UPPER WEISER RIVER-BAKER COUNTY- 543 AM MDT THU JUL 7 2011 /443 AM PDT THU JUL 7 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL IDAHO AND NORTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EVENING...POSSIBLE SMALL HAIL AND STRONG WINDS CAN BE EXPECTED WITH THESE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ARE ENCOURAGED TO REPORT HAZARDOUS WEATHER ACCORDING TO STANDARD OPERATING PROCEDURES. IDZ012>016-028>030-ORZ061-063-064-081145- LOWER TREASURE VALLEY ID-BOISE MOUNTAINS-UPPER TREASURE VALLEY- SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY-CAMAS PRAIRIE- OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY-HARNEY COUNTY- MALHEUR COUNTY-LOWER TREASURE VALLEY OR- 543 AM MDT THU JUL 7 2011 /443 AM PDT THU JUL 7 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO AND SOUTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
213 PM MDT THU JUL 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0136 PM TSTM WND GST FLAGSTAFF HILL 44.81N 117.73W
07/07/2011 E57.00 MPH BAKER OR MESONET
THUNDERSTORM WIND GUST MAXIMUM IN THE HOUR ENDING AT
155PM. TIME ESTIMATED FROM RADAR. ABUNDANT LIGHTNING IN
THE AREA.
&&
VMILLSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOISE ID 304 PM MDT THU JUL 7 2011 IDZ012-029-ORZ063-072145- OWYHEE ID-MALHEUR OR- 304 PM MDT THU JUL 7 2011 THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... EAST CENTRAL MALHEUR COUNTY IN SOUTHEAST OREGON... AND NORTHWESTERN OWYHEE COUNTY IN SOUTHWEST IDAHO... UNTIL 345 PM MDT. AT 300 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 18 MILES NORTHWEST OF REYNOLDS...MOVING EAST AT 25 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. THE THUNDERSTORM WILL BE NEAR... ROCKVILLE...ROCKVILLE SCHOOL AND MAFLOY RANCH AROUND 305 PM MDT... ELEPHANT BUTTE AROUND 330 PM MDT. LAT...LON 4349 11680 4329 11658 4322 11708 4339 11715 TIME...MOT...LOC 2104Z 255DEG 20KT 4333 11700
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
336 PM MDT THU JUL 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0304 PM TSTM WND GST ROME 42.83N 117.62W
07/07/2011 M48.00 MPH MALHEUR OR AWOS
OUTFLOW WINDS FROM THE SW 230 DEGREES.
&&
VMILLSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOISE ID 336 PM MDT THU JUL 7 2011 IDZ012-029-072200- CANYON ID-OWYHEE ID- 336 PM MDT THU JUL 7 2011 THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTH CENTRAL CANYON COUNTY IN SOUTHWEST IDAHO... AND NORTHWESTERN OWYHEE COUNTY IN SOUTHWEST IDAHO... UNTIL 400 PM MDT. AT 333 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 11 MILES WEST OF MELBA...MOVING EAST AT 25 MPH. WIND GUSTS UP TO 50 MPH AND SMALL HAIL ARE EXPECTED WITH THIS STORM. BLOWING DUST WILL REDUCE VISIBILITIES. THE THUNDERSTORM WILL BE NEAR... ELEPHANT BUTTE AROUND 335 PM MDT... GIVENS HOT SPRINGS AROUND 340 PM MDT... WALTERS FERRY AROUND 350 PM MDT... MELBA AROUND 355 PM MDT. LAT...LON 4358 11652 4334 11651 4327 11684 4349 11692 TIME...MOT...LOC 2134Z 255DEG 23KT 4338 11674
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
354 PM MDT THU JUL 7 2011
IDZ012-014-072215-
CANYON ID-ADA ID-
354 PM MDT THU JUL 7 2011
THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
CENTRAL ADA COUNTY IN SOUTHWEST IDAHO...
AND SOUTHEASTERN CANYON COUNTY IN SOUTHWEST IDAHO...
UNTIL 415 PM MDT.
AT 347 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MELBA...MOVING EAST AT 40 MPH.
OUTFLOW OUT OF A STRONG THUNDERSTORM WILL PRODUCE WIND GUSTS UP TO
50 MPH. BLOWING DUST WILL ACCOMPANY THE OUTFLOW REDUCING
VISIBILITIES.
THE THUNDERSTORM WILL BE NEAR...
MELBA AND NAMPA AROUND 350 PM MDT...
INITIAL POINT AROUND 355 PM MDT...
KUNA AROUND 400 PM MDT...
MERIDIAN AROUND 405 PM MDT...
EAGLE AROUND 410 PM MDT...
BLACKS CREEK RESERVOIR...BOISE...LUCKY PEAK DAM AND GARDEN CITY
AROUND 415 PM MDT.
LAT...LON 4374 11620 4345 11598 4334 11652 4364 11666
TIME...MOT...LOC 2151Z 252DEG 33KT 4344 11651PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
355 PM MDT THU JUL 07 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0340 PM TSTM WND GST 1 SE GIVENS HOT SPRINGS 43.42N 116.71W
07/07/2011 E50 MPH OWYHEE ID TRAINED SPOTTER
&&
CBAXTERThe Boise radar (KCBX), 30 km away, was scanning. The volume nearest the first event began at 22:01 UTC.
2 thunderstorm wind. Local standard time, as filed.
Several reports of downed trees and fences and damage to homes were received from local media.
Several reports of downed trees and fences and damage to homes were received from local media.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2011Every state in 2011This day in weather historyWarnings in Idaho, July 2011
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: 331155, 331154.