Hail, Sioux
- When
- July 20, 4:22 PM MST
- Where
- Sioux County, 8.5 mi W of Harrison
- Measured
- 0.75 in hail
- Reported by
- Public
- Coordinates
- 42.680, -104.037
Also brief wind gusts estimated from 40 to near 60 mph.
Hail in Nebraska, July 20, 2008
A severe thunderstorm produced some hail and strong winds over far western Sioux county.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS CYS wrote it up.
A severe thunderstorm produced some hail and strong winds over far western Sioux county.
What forecasters said that day
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 Cheyenne, WY wrote its last area forecast discussion before the first event at Jul 20, 2:10 PM MST, 2 hours 12 minutes earlier.
Area forecast discussion, Jul 20, 2:10 PM MST, 2 hours 12 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 310 PM MDT SUN JUL 20 2008 .SHORT TERM...TONIGHT THROUGH TUESDAY... UPPER LEVEL RIDGING WILL PREVAIL THROUGH TUE WITH THE UPPER FLOW PATTERN BECOME MORE AMPLIFIED DURING THE PERIOD. UNDERNEATH THE RIDGE ...SURFACE FEATURES ARE PROGGED TO BE WEAK AND RELATIVELY INSIGNIFICANT. MID AND UPPER LEVEL MONSOONAL MOISTURE WILL INCREASE OVER THE REGION AS IT IS PULLED NORTHWARD AND EASTWARD ON THE BACKSIDE OF THE UPPER HIGH. TEMPERATURES WILL REMAIN ABOVE NORMAL TONIGHT THROUGH TUE WITH AFTERNOON AND EVENING THUNDERSTORMS POSSIBLE DAILY AS THE MOISTURE INTERACTS WITH DIURNALLY TRENDED INSTABILITY. .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...SOME TSTMS WILL LINGER THROUGH TUE EVENING ESPECIALLY OVER WESTERN THIRD OF CWA UNDER THE MONSOONAL MOISTURE FLOW. UPPER RIDGE AXIS WILL BE SHIFTING EAST OF THE CWA TUE NIGHT AS A COUPLE OF DECENT SHORTWAVE TROUGHS SWEEP ACROSS NORTHERN ROCKIES. WHILE THE DYNAMICS WITH THESE SHORTWAVES WILL REMAIN NORTH OF OUR CWA...THEY WILL CAUSE THE FLOW ALOFT TO VEER TO WESTERLY. THIS WILL IN TURN TILT THE MONSOONAL MOISTURE MORE OVER THE SE HALF OF THE CWA WHERE MOST OF THE TSTMS WILL BE WED AFTERNOON/EVENING. A WEAK PACIFIC COLD FRONT WILL PUSH FROM NW TO SE ACROSS THE CWA WED NIGHT AND EARLY THU MORNING. FRONT WILL BECOME STATIONARY OVER SOUTH CENTRAL WY THU AFTERNOON...THEN SHIFT VERY SLOWLY BACK TO THE EAST OVER THE WEEKEND AS RIDGE ALOFT BUILDS BACK OVER THE ROCKIES. THIS PATTERN WILL MEAN A BETTER CHANCE OF AFTERNOON/EVENING TSTMS MAINLY OVER EASTERN THIRD TO HALF OF CWA AS LOW LEVEL MOISTURE INCREASES ON UPSLOPE SSE WINDS. LOW LEVEL THETA-E AND INSTABILITY/CAPE WILL ALSO BE IMPROVED THURSDAY THROUGH SUNDAY. AFTER A WARM WED...TEMPS WILL BE A BIT COOLER THU THEN A LITTLE WARMER OVER THE WEEKEND. && .AVIATION...VFR CONDITIONS EXPECTED THROUGH TUE. STRONG AND GUSTY SURFACE WINDS CAN BE EXPECTED IN THE VICINITY OF HIGH BASED THUNDERSTORMS. TEMPORARY AND LOCALIZED MVFR CONDITIONS ARE NOT INCONCEIVABLE IN THE VICINITY OF STORMS. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM/AVIATION...JR LONG TERM...JLH
Hazardous weather outlook, Jul 20, 4:02 PM MST, 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 502 PM MDT SUN JUL 20 2008 NEZ020-054-055-WYZ059-061>067-069-070-211130- BANNER-KIMBALL-CHEYENNE-CONVERSE-SOUTHWEST CARBON-NORTH CARBON- SNOWY RANGE-NORTH LARAMIE RANGE-LARAMIE VALLEY-LARAMIE RANGE- PLATTE-CHEYENNE FOOTHILLS-PINE BLUFFS- 502 PM MDT SUN JUL 20 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT A FEW THUNDERSTORMS WILL OCCUR ACROSS THE AREA THROUGH THIS EVENING...WITH SCATTERED THUNDERSTORMS IN THE MOUNTAINS. SMALL HAIL AND WIND GUSTS TO 50 MPH WILL BE POSSIBLE WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY LATE DAY THUNDERSTORMS WILL BE POSSIBLE EACH DAY TUESDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ001>003-019-021-211130- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-MORRILL- 502 PM MDT SUN JUL 20 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS CAN BE EXPECTED THROUGH THE EVENING HOURS...AND A FEW OF THESE WILL BE SEVERE WITH LARGE HAIL AND HEAVY RAIN BEING THE MAIN THREATS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11 PM MDT THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY LATE DAY THUNDERSTORMS WILL BE POSSIBLE EACH DAY TUESDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NECESSARY THROUGH THIS EVENING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ060-068-211130- NIOBRARA-GOSHEN- 502 PM MDT SUN JUL 20 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL OCCUR THROUGH THIS EVENING...AND A FEW OF THESE WILL HAVE SMALL HAIL AND HEAVY RAIN. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY LATE DAY THUNDERSTORMS WILL BE POSSIBLE EACH DAY TUESDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH THIS EVENING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
In the hours before
Special weather statement, Jul 20, 3:22 PM MST, 1 hour before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 422 PM MDT SUN JUL 20 2008 WYZ060-202330- NIOBRARA- INCLUDING THE CITY OF...LUSK 422 PM MDT SUN JUL 20 2008 ...STRONG THUNDERSTORM OVER SOUTHWESTERN NIOBRARA COUNTY... AT 420 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM FROM JUST WEST OF LUSK TO SOUTH OF MANVILLE ...OR ABOUT 8 MILES WEST OF LUSK. THIS STORM WAS MOVING EAST NORTHEAST AT 20 MPH AND WILL BE AFFECTING LUSK BY 425 PM. SMALL HAIL...HEAVY RAIN...DEADLY LIGHTNING AND WIND GUSTS TO 40 MPH CAN BE EXPECTED WITH THIS STORM. JLH
Special weather statement, Jul 20, 3:50 PM MST, 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 450 PM MDT SUN JUL 20 2008 NEZ001-WYZ060-068-202320- SIOUX-NIOBRARA-GOSHEN- INCLUDING THE CITIES OF...HARRISON...LUSK...TORRINGTON 450 PM MDT SUN JUL 20 2008 ...STRONG THUNDERSTORMS OVER FAR EAST CENTRAL WYOMING MOVING INTO THE NORTHWESTERN NEBRASKA PANHANDLE... AT 448 PM MDT...SCATTERED THUNDERSTORMS WERE OVER THE SOUTH CENTRAL AND SOUTHEAST PARTS OF NIOBRARA COUNTY. THE STRONGEST STORMS WERE LOCATED IN A SMALL LINE FROM JUST EAST OF LUSK TO ABOUT 12 MILES SOUTH OF LUSK AT A POINT IN FAR NORTHERN GOSHEN COUNTY. HEAVY RAIN AND SOME SMALL HAIL WERE REPORTED WITH THIS SMALL LINE OF STORMS AS IT PASSED THROUGH THE TOWN OF LUSK. OTHER STRONG THUNDERSTORMS WERE DEVELOPING RAPIDLY IN THE CENTRAL PART OF SIOUX COUNTY IN THE NORTHWESTERN NEBRASKA PANHANDLE. ALL OF THE STORMS WERE MOVING EAST AT 25 MPH. SMALL HAIL...HEAVY RAIN AND BRIEF WIND GUSTS TO 40 MPH WILL ACCOMPANY THESE STORMS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF THE NEBRASKA PANHANDLE UNTIL 11 PM MDT THIS EVENING. JLH
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 hail. Local standard time, as filed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Excessive Heat in Missouri, July 20 to 21, 2008
- Damaging Winds and Lightning Strikes in Massachusetts, July 20, 2008
- Damaging Winds and Lightning Strike in Iowa, July 20 to 21, 2008
- Heat in Kentucky, July 20 to 21, 2008
- Heat in Mississippi, July 20, 2008
- Rip Current in Florida, July 20, 2008
- Hail in Nebraska, July 20, 2008
- Damaging Winds and Lightning Strikes in Indiana, July 20, 2008
- Hail in Minnesota, July 20, 2008
- Flash Flood in California, July 20, 2008
- Damaging Winds in West Virginia, July 20, 2008
- Damaging Winds in Pennsylvania, July 20, 2008
More
Every storm in Nebraska in 2008Every state in 2008This day in weather historyWarnings in Nebraska, July 2008
Sources
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: 104454.