A tornado took a roof off a house 2 miles north of Challis.
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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 PIH wrote it up.
A tornado took a roof off a house 2 miles north of Challis.
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 Pocatello, ID wrote its last area forecast discussion before the first event at Apr 24, 1:17 PM MST, 1 hour 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 217 PM MDT THU APR 24 2008 .SHORT TERM...TODAY THROUGH SUNDAY. UPPER TROF AXIS AND REMNANTS OF ITS ASSOCIATED CLOSED LOW ARE OVERHEAD SE IDAHO AS OF 2PM. AREA OF MOISTURE EXTENDS FROM ARCO DESERT EAST TO JACKSON AND NORTH TO DUBOIS/ISLAND PARK. PRECIP IS MIXTURE OF RAIN AND SNOW...WITH THE ADDED DYNAMICS OF THE LOW PRODUCING ENOUGH INSTABILITY FOR SOME MODERATE SHOWERS AND EVEN AN EMBEDDED ISOLATED THUNDERSTORM WEST OF BLACKFOOT. LOW CENTER AND TROF AXIS WILL CONTINUE TO DRIFT ESE THRU THE EVE HRS PUSHING THE PRECIP INTO THE ERN AND SRN HIGHLANDS. HAVE ADDED A SMALL AREA OF THUNDER TO AFTN/EVE GRIDS FOR ERN PORTIONS OF THE SNAKE VALLEY. WINDS WILL REMAIN BREEZY UNTIL SUNSET AS SURFACE PRESSURE GRADIENT ASSOCIATED WITH THE UPPER TROF CONTINUES TO BE ABOUT 6MB ACROSS THE CWA. THIS SYSTEM WILL MOVE INTO WY TONIGHT WITH PRECIP PRETTY MUCH ENDING ACROSS CWA SHORTLY AFTER MIDNIGHT. TRANSIENT RIDGING WILL COVER MOST OF REGION ON FRI...THOUGH A WEAK SECONDARY TROF CURRENTLY IN CENTRAL WA WILL SKIRT THE ID PANHANDLE AND CENTRAL AND NE MTNS BRINGING ISOLATED SHOWERS THERE TOMORROW AFTN. PRONOUNCED UPPER RIDGING BEGINS TO BUILD INTO THE GREAT BASIN ON SAT AND WILL PERSIST THRU THE WEEKEND WITH CLEAR TO PARTLY CLOUDY SKIES. NW FLOW ALOFT WILL KEEP TEMPS BELOW NORMAL FOR FRI AND SAT BUT GOOD WARM AIR ADVECTION ARRIVES ON SUN...PUSHING TEMPS NEAR/ABOVE SEASONAL NORMS. WARANAUSKAS .LONG TERM...SUNDAY NIGHT THROUGH THURSDAY. 12Z GFS AND 00Z ECMWF IN REASONABLE AGREEMENT THROUGHOUT FORECAST PERIOD (THIS CYCLE) WITH UPPER RIDGE SHIFTING EAST ACROSS FORECAST AREA SUNDAY NIGHT AND EXITING INTO WYOMING MONDAY. THERE ARE SOME DIFFERENCES IN DETAILS BETWEEN THE MODELS CONCERNING IMPACTS OF EJECTING FEATURES FROM NEXT UPSTREAM LOW BUT GENERAL CONSENSUS HAS UPPER LOW DIGGING SE INTO IDAHO SOMETIME WEDNESDAY (12Z WED ON ECMWF AND 00Z THU ON GFS) WITH ACCOMPANYING COOLER TEMPERATURES AND PRECIPITATION SPREADING ACROSS THE REGION. LOW SLOW TO SHIFT EAST OF REGION WITH IMPACTS GENERALLY LINGERING INTO THURSDAY. THUS HAVE GENERALLY KEPT FORECAST ON THE DRY SIDE THROUGH TUESDAY MORNING AND THEN GRADUALLY RAMPED PRECIPITATION POTENTIAL UP LEADING INTO WEDNESDAY WITH COLD UPPER LOW OVERHEAD THEN RAMPING DOWN INTO THURSDAY AS LOW SHIFTS EAST. STATISTICAL TEMPERATURE GUIDANCE SHOWS WARMEST DAY MONDAY AS RIDGE SHIFTS EAST OF DIVIDE AND WARM SOUTHWEST FLOW OVERSPREADS FORECAST AREA. HIGHS IN THE MID TO UPPER 60S FOR THE VALLEY LOOKS REASONABLE MONDAY THEN DROPPING INTO THE LOW TO MID 50S BY WEDNESDAY/THURSDAY WITH ONSET OF LOW. HUSTON && .AVIATION...UPPER LOW PASSING OVERHEAD THIS AFTERNOON HAS SPAWNED AND SUPPORTED CONVECTION WITHIN THE UPPER VALLEY (NEAR KIDA). LATEST RADAR TRENDS HAVE THIS ACTIVITY SPREADING SOUTH TOWARD KPIH WITH TEMPORARY MVFR CIG/VIS IMPACTS EXPECTED THROUGH ABOUT 02Z BEFORE UPPER LOW SHIFTS EAST AND LOSS OF SURFACE HEATING PUTS AND END TO THE SHOWER ACTIVITY. SCT MID-LEVEL CLOUDS WILL LIKELY PERSIST THROUGH THE REMAINDER OF THE NIGHT. A STRONG SURFACE PRESSURE GRADIENT HAS HELPED TO ENHANCE WINDS THROUGHOUT THE SNAKE RIVER VALLEY THIS AFTERNOON. THE GRADIENT ALONG WITH THE WINDS WILL BEGIN TO FALL OFF RAPIDLY AFTER 02Z. HUSTON && .PIH WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY UNTIL 8 PM MDT THIS EVENING FOR IDZ021. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 557 AM MDT THU APR 24 2008 IDZ017>025-031-032-251200- EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS- UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN- SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS- CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION- BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI- 557 AM MDT THU APR 24 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT UPPER LEVEL TROUGH MOVES THROUGH SOUTHEASTERN IDAHO TODAY AND BRINGS GUSTY WINDS TO AREA. LAKE WIND ADVISORY HAS BEEN ISSUED AND WILL LAST THROUGH 8PM THIS EVENING FOR THE AMERICAN FALLS RESERVOIR FOR SWLY WINDS FROM 15 TO 25 MPH. AS THE TROUGH PASSES THROUGH OUR AREA...RAIN AND SNOW SHOWERS CAN BE EXPECTED ACROSS ENTIRE FORECAST AREA WITH A PREPONDERANCE OF PRECIP IN THE SRN AND ERN MTNS. DISTURBANCE WILL EXIT IDAHO LATE THIS EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY WEAK SHORTWAVES DROP THROUGH AREA FRIDAY NIGHT INTO SATURDAY MORNING CAUSING BRIEF RAIN AND SNOW SHOWER TYPE PRECIP...AGAIN...MAINLY IN THE MTNS. LARGE AREA OF HIGH PRESSURE BUILDS IN ON SUNDAY AND PERSISTS THROUGH TUESDAY UNTIL THE NEXT SYSTEM ARRIVES. .SPOTTER INFORMATION STATEMENT... WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL... EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR 208-233-0834.
The Boise radar (KCBX), 198 km away, was scanning. The volume nearest the first event began at 21:29 UTC.
1 tornado. Local standard time, as filed.
A tornado was reported 2 miles north of Challis. It removed and destroyed a roof on a house.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2008Every state in 2008This day in weather historyThe tornado archive for Idaho, 2008Warnings in Idaho, April 2008
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: 97125.