Snow storm dropped from 6 to 9 inches of snow with isolated amounts of up to 11 inches. Some blowing and drifting was reported with roads closed in parts of southwest and central Wyoming including I-80.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 RIW wrote it up.
Snow storm dropped from 6 to 9 inches of snow with isolated amounts of up to 11 inches. Some blowing and drifting was reported with roads closed in parts of southwest and central Wyoming including I-80.
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 Riverton, WY wrote its last area forecast discussion before the first event at Feb 6, 12:30 PM MST, 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 1230 PM MST TUE FEB 6 2001 CAN FNT PRODUCING -SN OVR NRN FCST AREA THIS MRNG WITH MSTLY CLDY CONDS AND AREAS OF FOG ELSWR. H7 LOW FCST POSITIONS FM THIS MRNGS MM5 BACKUP TEST ARE SMLR TO THE 00Z ETA. THE LOW BCMS CNTRD OVR ERN ID BY 00Z TODAY THEN SLOWLY RE-DVLPS E OF THE DVD OVR JUST TO THE SOUTH OF CNTRL WY LTR TNGHT. AT THE SAME TIME AN H5 VORT MAX SWINGS IN FRM THE SW WITH SM SHT/WV ENERGY FOLLOWING ON WED AS WELL. THE H7 LOW THEN MAKES VERY SLOW PROGRESS SOUTHWARD AND DOESN/T REACH XTRM NW CO UNTIL WED AFTN. H7 UPSLP DOESN/T START DCRG SUBSTANTIALLY UNTL WED NGHT WHEN IT GRAD WKNS FM N TO S. AS THE H7 LOW SINKS ACRS CO A HIGH PRESSES IN FM THE N ON THUR...BUT THE H5 RDG LAGS BHND QUITE A BIT... SO THUR WILL STILL BE SMWHT UNSTTLD. WILL GO WITH A SNOW ADVSRY OVR CNTRL AND N-CNTRL WY TONIGHT-WED MRNG XCPT WNTR STRM WARNINGS OVR THE NE AND THE LND FOOTHLLS. IN THE SW WILL HOLD OFF ON A SNOW/BS ADVSRY UNTL LT TNGHT THRU WED. IN XTNDD THE MRF STILL SHOWING A MOIST SW FLOW ALF FOR SNOW OVER THE FAR W FRI-MON THEN LESS OF A CHC TUES AS A CUTOFF LOW DIGS OVR UT. FLOW PTTRN A LTL LESS ZONAL THAN PREV RUNS AND WILL NEED TO MONITOR SUBSQNT RUNS TO SEE IF CHC PCPN NEEDS TO BE ADDED E OF DVD. WILL AT LEAST ADD A CHC SNOW E OF DVD FOR TUES WITH A CUTOFF LOW FCST OVR SW WY. RWM .RIW...SNOW ADVSRY CNTRL AND N-CNTRL ZONES TONGHT-EARLY WED...WNTR STM WARNG LND FOOTHILLS TNGHT-EARLY WED...WNTR STM WARNING NE THIS AFTN-EARLY WED...SNOW/BS ADVSRY SW LT TNGHT-WED.
WYZ012-013-061900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1025 AM MST TUE FEB 6 2001 ...A DENSE FOG ADVISORY CONTINUES FOR THE WIND RIVER BASIN THIS MORNING... A COMBINATION OF DENSE FOG...AND FREEZING DRIZZLE WILL CONTINUE ACROSS THE WIND RIVER BASIN THROUGH MID DAY. THE FOG AND FREEZING DRIZZLE DEPOSITED BLACK ICE ON MANY ROAD AND SURFACES THIS MORNING...MAKING TRAVEL EXTREMELY DANGEROUS. HIGHWAY 789 BETWEEN LANDER AND RIVERTON WAS EXTREMELY SLICK IN SPOTS. ROADS IN AND AROUND LANDER...HUDSON...AND RIVERTON WERE ALSO EXTREMELY SLICK... DUE TO BLACK ICE. IN ADDITION TO THE ICE...THE FOG WAS REDUCING VISIBILITIES IN MANY AREAS...TO LESS THAN ONE HALF MILE. IF YOU MUST TRAVEL AROUND THE WIND RIVER BASIN THIS MORNING...USE EXTREME CAUTION...SLOW DOWN AND ALLOW EXTRA TIME FOR TRAVEL. WCJIN-WYNW JB
WYZ012-013-062100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1234 PM MST TUE FEB 6 2001 ...AREAS OF DENSE FOG WILL CONTINUE IN THE WIND RIVER BASIN THROUGH MID AFTERNOON... ALTHOUGH STARTING TO DISSIPATE IN SOME LOCATIONS...AREAS OF DENSE FOG WILL LINGER ACROSS THE WIND RIVER BASIN...BETWEEN LANDER AND RIVERTON THROUGH 2 PM. THE FOG WILL CONTINUE TO DEPOSIT BLACK ICE ON SOME ROADS...MAKING SURFACES EXTREMELY SLICK...AND CAUSE AREAS WITH VISIBILITIES TO LESS THAN ONE HALF MILE. WHILE DRIVERS WILL ENCOUNTER IMPROVING CONDITIONS INTO THE AFTERNOON...CONTINUE TO BE ALERT FOR SUDDEN DROPS IN VISIBILITY...AND ICY ROADS. WCJIN-WYNW JB g
The national radar mosaic for the moment the first event began.
6 winter storm. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2001Every state in 2001This day in weather historyWarnings in Wyoming, February 2001
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: 5232422, 5232426, 5232423, 5232421, 5232424, 5232425.