1 heavy snow, as filed by the National Weather Service.
Every event with a place to put it; 1 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 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 Pueblo, CO wrote its last area forecast discussion before the first event at Apr 5, 1:40 PM MST, 7 hours 20 minutes earlier.
SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO COLORADO
240 PM MDT THU APR 5 2001
...STRONG SPRING STORM TO MOVE THROUGH CO FRI-FRI EVE...
...POTENTIAL FOR HIGH ELEVATION HEAVY SNOW SW MTNS TNGT-FRI AM...
...POTENTIAL FOR STRONG/DAMAGING WINDS SERN CO FRI-FRI EVE...
CURRENTLY: LATEST WATER VAPOR/IR SATELLITE IMAGERY LOOPS SHOWED
CLOSED LOW JUST OFF THE SRN CA COAST AND SLOWLY MIGRATING EWD. A
FEW LIGHTNING STRIKES SHOWING UP IN NV/UT NEAR THE COLD CORE HEADING
N. FAIRLY GOOD FETCH OF HIGH LEVEL MOISTURE AOA 400MB STREAMING IN
FROM THE ERN PACIFIC OCEAN. 12Z/05 UPPER AIR ANALYSIS NOT SHOWING
MUCH IN THE WAY OF 700MB MOISTURE ACROSS DESERT SW WITH JUST SOME
500MB MOISTURE BEGINNING TO ADVANCE N-NEWD THROUGH DESERT SW. TO THE
S ACROSS NM/EXTREME WRN TX...RELATIVELY DRY LOW LEVELS PER UPPER AIR
ANALYSIS AND RAOBS/LAPS SOUNDINGS. ALONG I-25 AND EWD SHALLOW LOW
LEVEL MOISTURE HAS MIXED OUT WITH SURFACE DEW POINTS BEGINNING TO
TUMBLE KFCS 50F TO 20S. LAPS SOUNDINGS/PLAN VIEW DATA SHOWING SERN CO
AIR MASS STILL FAIRLY STABLE WITH JUST A FEW CU DEVELOPING ALONG THE
SERN CO MTNS. LITTLE OR NOTHING SHOWING UP ON RGNL RADARS. HAVE BEEN
KEEPING AN EYE ON THE DESERT SW FOR ANY PRECIPITATION FALLING. THERE
HAVE BEEN A COUPLE OF SHRA IN CNTRL AZ HEADIND N. NOTHING ELSEWHERE
SO FAR...SURFACE TEMP/DEW POINT SPREADS RUNNING HIGH AZ/NM. HOWEVER
WOLF CREEK RANCH SPOTTER(10K FT MSL) INDICATED ALREADY SNOWING...BUT
NOT STICKING.
TNGT: CONFIDENCE IS PRETTY LOW FOR ANY CONVECTION DEVELOPING
ACROSS SERN CO LATER THIS AFTN-EVE...AS STILL UNDER FAIRLY DEEP DRY
AIR MASS AND CU OUT THE WINDOW HAS POOR VERTICAL DEVELOPMENT. SHOULD
SEE 100-140KT ULJ OVER DESERT SW MOVE TOWARDS CNTRL ROCKIES TNGT.
ASSOCIATED 500MB CLOSED LOW STILL PROGGED TO "OPEN" OR FILL AND WILL
LIKELY BE CYCLIC TNGT-FRI EVE. IN RESPONSE TO THE ULJ MOVING INTO
CNTRL ROCKIES...LOWER/MID TROP SLY WINDS STILL PROGGED TO STRENGTH.
THE BIGGEST QUESTIONS ARE HOW MUCH VERTICAL MOISTURE WILL BE AROUND
AND HOW FAR W WILL THE SFC DRYLINE MIGRATE? TNGT'S 850-700MB AIR
PARCELS WILL LIKELY COME FROM NM/EXTREME WRN TX WHERE IT IS FAIRLY
DRY. THIS IS EVEN SEEN IN SERN CO MODEL SOUNDINGS FOR TNGT.
INSTABILITY NOT ALL THAT GREAT FOR SERN CO MTNS/PLAINS AS THERE IS NO
500MB CAA AND ANY 800-700MB THETA-E ADVECTION IS WELL TO THE N-NE
ACROSS NE-IA WHERE POTENTIAL MCS LIES. THE ONLY MOIST ADIABATIC AND
MORE UNSTABLE MID-LEVELS OCCURS OVER WRN CO IN ADVANCE OF 500MB COLD
CORE. EXCELLENT MOIST OROGRAPHIC ASCENT INFLOW TO THE SAN JUAN MTNS
TNGT. WOULD LIKE TO SEE A LITTLE MORE SWLY(200-240) INFLOW FOR ERN
SAN JUAN MTNS. ETA MODEL CONTINUE TO PRINT OUT .70-.80 INCH LIQUID.
10KM ETA/RAMS MODELS PRINTING OUT 1.00+ LIQUID FOR TNGT. WET BULB
ZERO PROGGED TO BE AROUND 10K FT MSL FOR SWRN CO MTNS. FOR THE SERN
CO PLAINS...DRYLINE SHOULD MIGRATE WWD AROUND SUNSET...BUT MAY STOP
AS PRESSURE FALLS OCCUR ALONG I-25...AND CYCLOGENESIS BEGINS AROUND
DEN AFTER MIDNIGHT. WILL PLAY DRYLINE ALONG CO/KS BORDER TNGT...BUT
COULD GET INTO KLAA-KLHX IF E-SELY SFC WINDS DEVELOP. SLY WINDS
LOWER TROP WINDS INCREASING WILL MAKE FOR CHALLENGE LOW TEMPS.
STRATUS LAYER SHOULD DEVELOP NEAR THE CO/KS BORDER AND SRN PLAINS AS
PBL COOLS. WITH HIGH CLOUD COVER AND WIND FLOW...LOWS MAY ONLY BE
AROUND 50F IN SERN CO PLAINS TNGT. WILL GO A LITTLE ABOVE MOS TEMPS.
PRECIPITATION FOR SERN CO MTNS/PLAINS...IF IT OCCURS...SHOULD BE
FAIRLY HIGH BASED AS MODEL SOUNDINGS STILL SUGGESTING FAIR DRY 800-
600MB LAYER TNGT...UNLESS THERE IS STRONG CONVECTION THAT FIRES LATE
TNGT...BUT JUST DON'T SEE GIVEN LACK OF INSTABILITY AND STRONG DEEP
VERTICAL MOTION OVER SERN CO MTNS/PLAINS TNGT.
FRI-FRI NGT: STILL LOOKS LIKE NEW SYNOPTIC LOW TO EVOLVE OVER NERN
CO...ESPECIALLY BY FRI AFTN/EVE. AGAIN...DEEP VERTICAL MOISTURE TO
WORK WITH WILL BE LACKING FOR SERN CO MTNS/PLAINS. BEST MOISTURE
IN WRN CO. AS SFC PRESSURE LOWERS IN RESPONSE TO UPPER LEVEL
SYSTEM...STRONG SLY WINDS DEVELOP ERN CO WITH STILL SOME DRIER AIR
JUST OFF THE DECK...SO ANY STRATUS/DRYLINE COULD MIX OUT QUICKLY.
WILL NEED SOME SYNOPTIC SCALE ASCENT TO ASSIST IN TSTM DEVELOPMENT
AS LOW LEVEL CONVG IS WEAK UNTIL DRYLINE KICKS OUT INTO WRN KS.
STRONGEST QS DIV AT 500-300MB LAYER ACROSS CO FRI. CAPES NOT ALL
THAT IMPRESSIVE 200-400 J/KG 15Z-21Z BEFORE THE STRONG SWLY WINDS
SHIFT DRYLINE/COLD FRONT INTO WRN KS. MODEL VERTICAL WIND PROFILE IS
NEARLY UNIDIRECTIONAL IN THE SERN CO PLAINS LATE FRI AM-AFTN...SO
WOULD TEND TO THINK IF ANYTHING DID FORM IT WOULD BE A SQUALL LINE.
HOWEVER 0-6KM SHEAR RUNNING MOD-STRONG (40-52KTS)...SO COULDN'T RULE
OUT A SUPERCELL WITH THE LINE. TIMING IS EVERYTHING. CURRENT THINKING
IS THE FAR ERN CO COUNTIES SHOULD HAVE THE POTENTIAL FOR ANY SEVERE
WX...MAINLY 1/4-1/2 INCH HAIL AND 50KT WIND GUSTS. WILL HOLD OFF ON
MENTIONING RIGHT NOW WITH SOME UNCERTAINTY. AFT 18Z-12Z...500MB COLD
POLE MOVES INTO ERN CO AS LOW LEVEL WINDS VEER SW-WLY AND STRENGTHEN.
ISOLLOBARIC GRADIENT REALLY TIGHTEN UP FRI AFTN-EVE AS SYNOPTIC LOW
DEEPENS OVER SWRN NE. STILL THE POTENTIAL OF REACHING PLAINS HIGH
WIND CRITERIA(>40 MPH SUSTAINED...> 57 MPH GUSTS) ALONG I-25/EWD...
ESPECIALLY IF GAP FLOW STRENGTHENS AROUND WALSENBURG AREA. AIR MASS
REALLY DRYS OUT FOR SERN CO MTNS/PLAINS 21Z-00Z ON FRI. ONLY MOISTURE
REMAINS ALONG AND W OF CONTDVD. WILL HOIST HIGH WIND WATCH FOR FRI-
FRI EVE SERN CO PLAINS. LOW STARTS TO PULL AWAY BY 03Z FRI NGT AND
GRADIENT SHOULD DECREASE. FOR THE SW CO MTNS...WLY WINDS BY 18Z FRI
SHOULD SHUTDOWN ANY SNOW...BUT WILL INCREASE CHANCES FOR CNTRL MTNS.
WILL HOLD OFF ON ANY HEADLINES FOR 58/59...THOUGH. FWC POPS STILL MAY
BE TOO HIGH AND MAV POPS HAVE NOW DROPPED CONSIDERABLY TO LOW
"CHANCES." ZFP POP FORECAST HAS BEEN FLIP-FLOPPING...SO WILL
MAINTAIN CURRENT WORDING. WITH 500MB COLD CORE AND SOME RESIDUAL
MOISTURE...THERE COULD BE SOME VIRGA "BOMBS" IN THE SERN CO PLAINS
FRI AFTN WHICH WOULD ONLY ENHANCE THE HIGH WIND POTENTIAL DUE TO
DOWNWARD TRANSPORT OF MOMENTUM.
SAT-SAT NGT: GENERALLY...WLY FLOW ALOFT...WHICH MEANS LITTLE OR NO
CHANGES FOR PRECIPITATION SERN CO MTNS/PLAINS...BUT MOISTURE HANGS
ON ALONG AND W OF CONTDVD. MOS TEMPS FAIRLY CLOSE AND LOOK
REASONABLE MIXING DRY ADIABATIC TO 600MB.
EXTENDED(SUN-THU): EFP WAS CHANGED ON THE MIDSHIFT...SO NO CHANGES
FORI THIS PACKAGE.
.PUB...WINTER STORM WARNING...ZONE 61...TNGT-FRI NOON
...SNOW/BLOWING SNOW ADVISORY...ZONE 60...TNGT-FRI NOON
...HIGH WIND WATCH...ZONES 71>81(I-25 AND EWD)...FRI-FRI EVE.
METZEThe national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
A spring storm system produced 11 inches of snow at Wolf Creek Pass and 14 inches of snow at Creede in Mineral county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2001Every state in 2001This day in weather historyWarnings in Colorado, April 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: 5239252.