8 degrees set in 1953.
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.
The average temperature in May of 48.5 degrees at the Pocatello Regional Airport broke the previous all time record cold average temperature for the month of 48.8 degrees set in 1953.
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 30, 1:00 PM MST, 11 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 200 PM MDT FRI APR 30 2010 .SHORT TERM...TONIGHT THROUGH MONDAY. UPPER LOW REMAINS ANCHORED NEAR THE DAKOTAS THROUGH SATURDAY NIGHT WITH A REINFORCING SHORT-WAVE DROPPING INTO THE WRN EXTENT OF THE LOW AND DIVING ACROSS SE IDAHO SATURDAY AFTERNOON/EVE. THIS FEATURE IS EXPECTED TO BRING SCATTERED SHOWERS TO THE REGION ALONG WITH ISOLATED THUNDERSTORMS. A FLAT RIDGE OF HIGH PRESSURE BUILDS ACROSS OREGON AND SRN IDAHO SUNDAY/SUNDAY NIGHT FOR A SHORT DRYING TREND. BY EARLY MONDAY...A SECOND PAC SHORT-WAVE SPILLS INTO SW CANADA PROGRESSING EAST ALONG THE BORDER WITH AN ASSOCIATED SURFACE COLD FRONT SPREADING INTO/THROUGH THE CNTRL MOUNTAINS MONDAY AFTERNOON. THUS HAVE MAINTAINED A FAIRLY HEALTHY CHANCE OF PRECIPITATION ACROSS THE NRN/ERN MOUNTAINS. MODELS SHOWING NEAR ZERO LI/S (NEARLY UNSTABLE CONDITIONS) MONDAY AFTERNOON SO WILL HOLD OFF ON ANY MENTION OF THUNDERSTORMS FOR THAT PERIOD FOR NOW. BUT IF COLD FRONT ACTUALLY ATTAINS STRENGTH ADVERTISED BY THE GFS...IT MAY BE ENOUGH TO FORCE THE ISSUE. AS FOR NEAR TERM IMPACTS...LAKE WIND ADVISORY CONDITIONS ARE JUST NOT MATERIALIZING THIS AFTERNOON AT AMERICAN FALLS AND WILL LIKELY DROP THE ADVISORY THERE FOR THE REMAINDER OF THE AFTERNOON. SURFACE PRESSURE GRADIENT IS NOT AS STRONG TOMORROW BUT MIXING LOOKS BETTER AND WITH SUPPORT FROM MOS GUIDANCE...HAVE GONE AHEAD AND ISSUED A LAKE WIND ADVISORY FOR SATURDAY AFTERNOON. WITH MAY 1ST COMES THE FROST/FREEZE PRODUCTS AND IT LOOKS AS IF THE WINDS WILL DROP OFF AND SKIES WILL CLEAR ENOUGH TONIGHT TO ALLOW LOWS TO DROP TO NEAR FREEZING IN THE SNAKE PLAIN. THUS HAVE ISSUED A FROST ADVISORY. .LONG TERM...MONDAY NIGHT THROUGH FRIDAY. 12Z EUROPEAN AND GFS RUNS NOW IN BETTER AGREEMENT AGREEING IN GENERAL COLD SOLUTION IN THIS PERIOD KEEPING AN UPPER TROF OVER THE REGION AND DROPPING STORM SYSTEMS IN FROM THE NORTH. KEPT HIGH TEMPERATURES WELL BELOW NORMAL THROUGH THURSDAY WITH THE CHANCE FOR SHOWERS EACH DAY WITH COLD AIR ALOFT LIKELY REMAINING OVER IDAHO. GFS DOES HAVE SOME MODERATION AND DRYING BY NEXT FRIDAY BUT FOR NOW KEPT IN A CHANCE FOR PRECIPITATION AND ONLY RAISED TEMPERATURES SLIGHTLY BUT KEPT COLDER THAN NORMAL. GK && .AVIATION...SHOWERS ONCE AGAIN THIS AFTERNOON AND EARLY EVENING. MAINLY VFR BUT PIH AND IDA UNDER A SHOWER COULD BRIEFLY GO MVFR. EXPECT SHOWERS TO DISSIPATE OVERNIGHT. WINDS NOT AS STRONG TODAY BUT STILL 10 TO 20 MPH SUSTAINED AT BYI AND PIH. EXPECT GUSTS TO WEAKEN OVERNIGHT. EXPECT SIMILAR CONDITIONS ON SATURDAY. MAINLY VFR WITH AFTERNOON SHOWERS DEVELOPING. GK && .PIH WATCHES/WARNINGS/ADVISORIES... LAKE WIND ADVISORY IDZ021 SATURDAY 11AM TO 8PM MDT. FROST ADVISORY IDZ020-021 LATE TONIGHT THROUGH SATURDAY MORNING. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 408 AM MDT FRI APR 30 2010 IDZ017>025-031-032-011015- 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- 408 AM MDT FRI APR 30 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT MORE RAIN AND SNOW SHOWERS ARE EXPECTED TODAY. PRECIPITATION AMOUNTS WILL REMAIN LIGHT...HOWEVER. IT WILL ALSO BE ANOTHER VERY BREEZY DAY ACROSS EASTERN IDAHO. STRONG NORTHWEST DRAINAGE WINDS WILL AFFECT PORTIONS OF THE UPPER SNAKE PLAIN...ESPECIALLY ACROSS THE ARCO DESERT THIS MORNING. SUSTAINED WINDS OF 25 TO 35 ARE FORECAST WITH HIGHER GUSTS. STRONG WEST T NORTHWEST WINDS ARE ALSO FORECAST THROUGH MOST OF THE DAY ACROSS MOST OF THE LOWER SNAKE PLAIN...EASTERN MAGIC VALLEY AND SOUTH CENTRAL HIGHLANDS. SUSTAINED WIND OF 20 TO 30 MPH ARE FORECAST...WITH MORE LOCALIZED AREAS SEEING WINDS OF 30 TO 35 MPH. THE STRONGEST WINDS WILL BE FOCUSED AROUND OAKLEY...CONNER SUMMIT AND I-84 FROM EAST OF BURLEY TO THE UTAH BORDER. ANYWHERE STRONGER WINDS DEVELOP...BLOWING DUST COULD POSE AN ISSUE. WITH STRONG WESTERLY WINDS EXPECTED ON AMERICAN FALLS RESERVOIR...A LAKE WIND ADVISORY HAS BEEN ISSUED FOR LATER IN THE MORNING AND THIS AFTERNOON. WINDS AND RAIN/SNOW CHANCES WILL DIMINISH FOR TONIGHT. DAYTIME TEMPERATURES TODAY WILL BE RUNNING 10 OR MORE DEGREES COOLER THAN AVERAGE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ANOTHER SYSTEM WILL PRODUCE A CHANCE OF RAIN AND SNOW SHOWERS SATURDAY. THE HIGHEST CHANCES WILL BE IN THE MOUNTAINS...BUT AGAIN PRECIPITATION AMOUNTS WILL BE LIGHT. IT WILL BE ANOTHER BREEZY DAY...HOWEVER WINDS WILL BE LIGHTER THAN AS OF LATE. FORECAST WIND SPEEDS WILL CREATE MORE PROBLEMS FOR BOATERS ON AMERICAN FALLS RESERVOIR AND A LAKE WIND ADVISORY IS LIKELY NEEDED ON SATURDAY. AS HIGH PRESSURE BUILDS IN FOR SUNDAY...ANY SHOWERS THAT FORM WILL BE CONFINED TO THE HIGHER ELEVATIONS. WHILE DAYTIME TEMPERATURES WARM SOMEWHAT...WE WILL STILL BE RUNNING 10 OR MORE DEGREES COOLER THAN AVERAGE. ANOTHER CONCERN WILL BE OVERNIGHT LOWS. WITH WINDS CALMING DOWN...THERE IS A BETTER POTENTIAL FOR A FEW HOURS OF AT OR BELOW FREEZING TEMPERATURES. WITH GROWING SEASON OFFICIALLY STARTING FOR THOSE ACROSS THE SNAKE PLAIN...THERE IS A LIMITED THREAT OF DAMAGE TO PLANTS AND SENSITIVE VEGETATION. PAY CLOSE ATTENTION THE THE LATEST FORECASTS THROUGH THE WEEKEND AS THE NUMBER OF HOURS OF COLD WEATHER MAY BE CAUSE FOR CONCERN. SHOWERS WILL REMAIN THE FORECAST THROUGH THE MIDDLE OF NEXT WEEK AS THE POTENTIAL FOR ANOTHER LINGERING STORM SYSTEM ACROSS THE REGION EXISTS. .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.
1 cold/wind chill. Local standard time, as filed.
The average temperature in May of 48.5 degrees at the Pocatello Regional Airport broke the previous all time record cold average temperature for the month of 48.8 degrees set in 1953.
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, May 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: 231947.