Alert archive / Colorado / Winter Storm Warnings in 2009
Winter Storm Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Mar 31, 2009, 9:57 AM MDT for Grand County, Jackson County, Colorado. It was in force for 38 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 31, 2009, 9:57 AM MDT (15:57 UTC)
- Expired
- Apr 2, 2009, 12:00 AM MDT
- In force
- 38 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Grand County, CO, Jackson County, CO
The radar
The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 16:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 1, 4:30 PM MDT | SNOW 3.5 | 1 Nw Grand Lake, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 4.0 hours before the alert went out and 239 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1280 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS45 KBOU 311557 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 957 AM MDT TUE MAR 31 2009 COZ031-010000- /O.UPG.KBOU.WW.Y.0018.090401T0000Z-090402T0600Z/ /O.NEW.KBOU.WS.W.0007.090331T1557Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 957 AM MDT TUE MAR 31 2009 ...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. WIDESPREAD SNOW HAS DEVELOPED OVER THE MOUNTAINS OF WESTERN JACKSON AND WESTERN GRAND COUNTIES. SNOWFALL RATES OF ONE HALF TO ONE INCH PER HOUR CAN BE EXPECTED TODAY THROUGH TOMORROW. SNOW WILL BECOME MORE WIDESPREAD THIS EVENING AS THE STORM SYSTEM MOVES INTO NORTHERN UTAH. THE SNOW WILL PERSIST THROUGH WEDNESDAY EVENING AS THIS SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 11 TO 15 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ033-034-010000- /O.CON.KBOU.WW.Y.0018.090401T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 957 AM MDT TUE MAR 31 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT WEDNESDAY NIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT WEDNESDAY NIGHT. SNOW WILL BECOME WIDESPREAD THIS EVENING AS A STORM SYSTEM MOVES INTO NORTHERN UTAH. THE SNOW WILL PERSIST THROUGH WEDNESDAY EVENING AS THIS SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 8 TO 14 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
8 follow-up statements
000 WWUS45 KBOU 010004 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 604 PM MDT TUE MAR 31 2009 COZ031-010615- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 604 PM MDT TUE MAR 31 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT. A BRIEF DECREASE IN THE SNOWFALL IS EXPECTED THIS EVENING...THEN THE MAIN PART OF A STORM SYSTEM WILL APPROACH CAUSING THE SNOW TO INCREASE LATER TONIGHT AND CONTINUE THROUGH WEDNESDAY EVENING. THE SNOW WILL BE HEAVY AT TIMES WITH SNOWFALL RATES OF ONE TO TWO INCHES PER HOUR DURING THE DAY ON WEDNESDAY. SNOWFALL DURING THE DAY TODAY WAS IN THE 3 TO 10 INCH RANGE. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 12 TO 20 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ033-034-010615- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 604 PM MDT TUE MAR 31 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT. SNOW WILL BECOME WIDESPREAD THIS EVENING AS A STORM SYSTEM MOVES INTO NORTHERN UTAH. THE SNOW WILL PERSIST THROUGH WEDNESDAY EVENING AS THIS SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 8 TO 14 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ GIMMESTAD
000 WWUS45 KBOU 010540 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1140 PM MDT TUE MAR 31 2009 COZ031-011145- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 1140 PM MDT TUE MAR 31 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT. A BRIEF DECREASE IN THE SNOWFALL IS EXPECTED TONIGHT...THEN THE MAIN PART OF A STORM SYSTEM WILL APPROACH CAUSING THE SNOW TO INCREASE TOWARDS DAWN AND CONTINUE THROUGH WEDNESDAY EVENING. THE SNOW WILL BE HEAVY AT TIMES WITH SNOWFALL RATES OF ONE TO TWO INCHES PER HOUR DURING THE DAY ON WEDNESDAY. SNOWFALL DURING THE DAY TODAY WAS IN THE 3 TO 10 INCH RANGE. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 12 TO 20 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ033-034-011145- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 1140 PM MDT TUE MAR 31 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT. OCCASIONAL LIGHT SNOW WILL CONTINUE TONIGHT...THEN SNOW WILL BECOME MORE WIDESPREAD AND HEAVY AT TIMES DURING THE DAY ON WEDNESDAY. THE SNOW WILL PERSIST THROUGH WEDNESDAY EVENING AS THE STORM SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 8 TO 14 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 45 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SWE
000 WWUS45 KBOU 011011 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 411 AM MDT WED APR 1 2009 COZ031-011615- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 411 AM MDT WED APR 1 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. A STORM SYSTEM APPROACHING THE REGION WILL CAUSE THE SNOW TO INCREASE THIS MORNING AND CONTINUE THROUGH WEDNESDAY EVENING. THE SNOW WILL BE HEAVY AT TIMES WITH SNOWFALL RATES OF ONE TO TWO INCHES PER HOUR DURING THE DAY ON WEDNESDAY. SNOWFALL AMOUNTS YESTERDAY WERE IN THE 3 TO 10 INCH RANGE. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 12 TO 20 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ035-036-038>041-011615- /O.EXB.KBOU.WW.Y.0018.090401T1600Z-090402T0300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING...ESTES PARK...NEDERLAND...EVERGREEN...FORT COLLINS... LOVELAND...ARVADA...BOULDER...LAKEWOOD...LONGMONT...AURORA... CASTLE ROCK 411 AM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 9 PM MDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 9 PM MDT THIS EVENING. WIDESPREAD SNOW OVER THE MOUNTAINS WILL SPREAD ACROSS THE URBAN CORRIDOR LATE THIS MORNING AND THIS AFTERNOON AS A STORM SYSTEM DROPS SOUTHEAST ACROSS COLORADO. PRECIPITATION MAY INITIALLY START OFF AS RAIN BUT QUICKLY CHANGE TO SNOW AS THE PRECIPITATION INTENSIFIES. A FEW THUNDERSTORMS MAY FORM WITH THIS SYSTEM PRODUCING LOCALLY HEAVY SNOW. TOTAL SNOW ACCUMULATIONS WILL BE 2 TO 6 INCHES. LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE IN THE FOOTHILLS...ALONG THE FOOTHILLS AND UNDER ANY CONVECTIVE SNOW. NORTH WINDS OF 10 TO 20 MPH WITH GUSTS TO 30 MPH WILL PRODUCE AREAS BLOWING AND DRIFTING SNOW. ROADS WILL LIKELY BECOME SNOW COVERED AND SLIPPERY LATE THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ033-034-011615- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 411 AM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW WILL BECOME MORE WIDESPREAD AND HEAVY AT TIMES DURING THE DAY ON WEDNESDAY. THE SNOW WILL PERSIST THROUGH WEDNESDAY EVENING AS THE STORM SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 8 TO 14 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 45 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KBOU 011601 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1001 AM MDT WED APR 1 2009 COZ031-012215- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 1001 AM MDT WED APR 1 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. A STORM SYSTEM MOVING THROUGH THE REGION WILL CONTINUE TO BRING SNOW THROUGH WEDNESDAY EVENING. THE SNOW IS EXPECTED TO INCREASE THIS AFTERNOON AND WILL BE HEAVY AT TIMES WITH SNOWFALL RATES OF ONE TO TWO INCHES PER HOUR THIS AFTERNOON INTO EARLY TONIGHT. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 12 TO 20 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ035-036-038>041-012215- /O.EXT.KBOU.WW.Y.0018.000000T0000Z-090402T0300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING...ESTES PARK...NEDERLAND...EVERGREEN...FORT COLLINS... LOVELAND...ARVADA...BOULDER...LAKEWOOD...LONGMONT...AURORA... CASTLE ROCK 1001 AM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING. A COMPLEX STORM SYSTEM NOW CENTERED OVER SOUTH-CENTRAL WYOMING IS EXPECTED TO REDEVELOP OVER THE EASTERN PLAINS THIS AFTERNOON AND THEN DROP QUICKLY SOUTHWARD LATER TONIGHT. THE AMOUNT OF SNOW FOR THE ADVISORY AREA WILL DEPEND ON THE PRECISE TRACK THE UPPER LEVEL LOW TAKES AS IT REFORMS EAST OF THE MOUNTAINS. AT THIS TIME IT APPEARS THAT THE BEST CHANCE OF A PERIOD OF MODERATE TO HEAVY SNOW WILL BE DELAYED A BIT...AND IS NOW EXPECTED TO BE THIS AFTERNOON INTO EARLY THIS EVENING. THE TIMING COULD PRODUCE VERY HAZARDOUS CONDITIONS FOR RUSH HOUR THIS AFTERNOON AND EVENING. TOTAL SNOW ACCUMULATIONS ARE STILL EXPECTED TO BE 2 TO 6 INCHES. LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE...ESPECIALLY IN THE FOOTHILLS. NORTH WINDS OF 10 TO 20 MPH WITH GUSTS TO 30 MPH WILL DEVELOP THIS AFTERNOON AND PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ033-034-012215- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 1001 AM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW WILL BECOME MORE WIDESPREAD AND HEAVY AT TIMES THIS AFTERNOON AND PERSIST THROUGH WEDNESDAY EVENING AS THE STORM SYSTEM DIVES SOUTHEAST THROUGH COLORADO AND INTO NEW MEXICO. TOTAL SNOW AMOUNTS FROM THIS STORM WILL RANGE FROM 8 TO 14 INCHES. NORTHWEST WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 45 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE OR BECOME SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SZOKE
000 WWUS45 KBOU 012219 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 419 PM MDT WED APR 1 2009 COZ031-020600- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 419 PM MDT WED APR 1 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL INCREASE AGAIN THIS EVENING AND WILL BE HEAVY AT TIMES...THEN DECREASE LATER TONIGHT. ADDITIONAL SNOWFALL OF UP TO 3 INCHES WILL BRING STORM TOTALS INTO THE 10 TO 20 INCH RANGE. NORTH WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ033-034-020600- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 419 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL CONTINUE THIS EVENING AND BE HEAVY AT TIMES..THEN DIMINISH AROUND MIDNIGHT. ADDITIONAL SNOWFALL OF 3 TO 5 INCHES WILL BRING STORM TOTALS INTO THE 6 TO 12 INCH RANGE. NORTH WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 45 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ035-036-038>041-020300- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING...ESTES PARK...NEDERLAND...EVERGREEN...FORT COLLINS... LOVELAND...ARVADA...BOULDER...LAKEWOOD...LONGMONT...AURORA... CASTLE ROCK 419 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING. AREAS OF HEAVY SNOW WILL SPREAD FROM AREAS IN AND NEAR THE FOOTHILLS ACROSS THE DENVER METRO AREA AND INTO EASTERN DOUGLAS AND WESTERN ELBERT COUNTIES DURING THE RUSH HOUR. SNOWFALL RATES OF UP TO TWO INCHES PER HOUR CAN BE EXPECTED. THERE WILL ALSO BE ISOLATED THUNDERSTORMS WITH SMALL HAIL. THIS SHORT LIVED BUT INTENSE BURST OF SNOW COULD PRODUCE VERY HAZARDOUS CONDITIONS FOR RUSH HOUR THIS EVENING. TOTAL SNOW ACCUMULATIONS ARE EXPECTED TO BE 2 TO 6 INCHES. LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE...ESPECIALLY IN THE FOOTHILLS. NORTH WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH WILL PRODUCE SOME AREAS OF DRIFTING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KBOU 020128 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 728 PM MDT WED APR 1 2009 COZ035-038>040-020230- /O.CAN.KBOU.WW.Y.0018.000000T0000Z-090402T0300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- 728 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER WEATHER ADVISORY. REMAINING SNOW SHOWERS WILL CONTINUE TO DIMINISH THIS EVENING WITH LITTLE OR NO ADDITIONAL ACCUMULATION. $$ COZ031-020600- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 728 PM MDT WED APR 1 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL GRADUALLY DECREASE THIS EVENING. ADDITIONAL SNOWFALL OF UP TO 3 INCHES WILL BRING STORM TOTALS INTO THE 10 TO 20 INCH RANGE. NORTH WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 40 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ COZ033-034-020600- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 728 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL DIMINISH FROM NORTH TO SOUTH THIS EVENING. ADDITIONAL SNOWFALL OF 2 TO 5 INCHES WILL BRING STORM TOTALS INTO THE 6 TO 12 INCH RANGE. NORTH WINDS OF 15 TO 25 MPH CAN BE EXPECTED...WITH GUSTS TO 45 MPH ABOVE TIMBERLINE. AS A RESULT...ROADS WILL BE SNOW PACKED AND SLICK WITH REDUCED VISIBILITIES IN BLOWING SNOW OVER THE HIGH MOUNTAIN PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ036-041-020300- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0300Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING...EVERGREEN...CASTLE ROCK 728 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING. SNOW WILL DIMINISH FROM NORTH TO SOUTH THIS EVENING. ADDITIONAL ACCUMULATIONS OF AN INCH OR TWO ARE POSSIBLE WITH THE HEAVIEST ACCUMULATIONS IN SOUTHERN PARTS OF JEFFERSON...DOUGLAS...AND ELBERT COUNTIES. NORTH WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH WILL ALSO GRADUALLY DIMINISH...WITH MINOR DRIFTING OF SNOW STILL POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ GIMMESTAD
000 WWUS45 KBOU 020305 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 905 PM MDT WED APR 1 2009 COZ036-041-020415- /O.EXP.KBOU.WW.Y.0018.000000T0000Z-090402T0300Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING...EVERGREEN...CASTLE ROCK 905 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING. SNOW SHOWERS WILL CONTINUE TO DECREASE...ENDING COMPLETELY AROUND MIDNIGHT. A FEW PLACES MAY STILL PICK UP ANOTHER INCH OF SNOW...MAINLY IN CENTRAL ELBERT COUNTY. NORTH WINDS AT 15 TO 25 MPH WILL ALSO CONTINUE TO DECREASE. $$ COZ031-020600- /O.CON.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 905 PM MDT WED APR 1 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL CONTINUE TO DECREASE THIS EVENING...ENDING AROUND MIDNIGHT. ADDITIONAL SNOWFALL OF AN INCH OR TWO IS STILL POSSIBLE WITH SOME OF THE SHOWERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVERS SHOULD STILL EXERCISE CAUTION AS ROADS ARE SLUSHY OR ICY. && $$ COZ033-034-020600- /O.CON.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 905 PM MDT WED APR 1 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. SNOW SHOWERS WILL CONTINUE TO DIMINISH THIS EVENING. ADDITIONAL SNOWFALL OF UP TO 2 INCHES ARE STILL POSSIBLE IN SOME OF THE SHOWERS...MAINLY SOUTH OF INTERSTATE 70. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVERS SHOULD STILL EXERCISE CAUTION AS ROADS ARE SLUSHY OR ICY. && $$ GIMMESTAD
000 WWUS45 KBOU 020623 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1223 AM MDT THU APR 2 2009 COZ031-020730- /O.EXP.KBOU.WS.W.0007.000000T0000Z-090402T0600Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING...RABBIT EARS PASS 1223 AM MDT THU APR 2 2009 ...WINTER STORM WARNING HAS EXPIRED... THE WINTER STORM WARNING IS NO LONGER IN EFFECT FOR THE NORTH CENTRAL MOUNTAIN OF COLORADO. SNOWFALL HAS DIMINISHED CONSIDERABLY IN THE HIGH COUNTRY OF NORTH CENTRAL COLORADO IN THE PAST COUPLE OF HOURS. THIS DRYING TREND WILL CONTINUE OVERNIGHT. $$ COZ033-034-020730- /O.EXP.KBOU.WW.Y.0018.000000T0000Z-090402T0600Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...CAMERON PASS...BRECKENRIDGE...WINTER PARK 1223 AM MDT THU APR 2 2009 ...WINTER WEATHER ADVISORY HAS EXPIRED... THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. LESS THAN TWO INCHES OF ADDITIONAL SNOW ACCUMULATION IS EXPECTED ON UPPER WEST FACING MOUNTAIN SLOPES BY THE MORNING. OTHERWISE SKIES WILL CONTINUE TO CLEAR AS DRIER AIR ASSOCIATED WITH A HIGH PRESSURE SYSTEM MOVES IN FROM THE WEST. $$ BAKER
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this winter storm warning went out at Mar 31, 3:55 AM MDT, 6 hours 2 minutes earlier.
Area forecast discussion, Mar 31, 3:55 AM MDT, 6 hours 2 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 355 AM MDT TUE MAR 31 2009 .SHORT TERM...UPPER LEVEL TROUGH IS EXITING THE REGION RESULTING IN A NORTHWEST FLOW ALOFT BEHIND IT. NO PRECIPITATION EXPECTED OVER THE PLAINS TODAY AS THE AIRMASS DRIES. THE NORTHWEST FLOW COMBINED WITH A MOIST AIRMASS UP TO 550MB WILL SQUEEZE OUT SOME SNOW OVER THE MOUNTAINS. THE SNOW LOOKS TO BE FOCUSED ON WEST AND NORTHWEST FACING SLOPES BECAUSE OF THE OROGRAPHIC LIFT. SNOW AMOUNTS WILL BE LIGHT IN THE MOUNTAINS TODAY WITH ONLY A COUPLE OF INCHES EXPECTED ON FAVORED SLOPES. TEMPERATURES WILL WARM INTO THE 40S TODAY OVER THE PLAINS. AN UPPER LEVEL TROUGH WILL DIG SOUTH ACROSS THE GREAT BASIN TONIGHT AND BE OVER NORTHERN UTAH COME WEDNESDAY MORNING. MOISTURE WILL DEEPEN OVER THE MOUNTAINS AND LIFT WILL INCREASE WITH THE APPROACH OF THIS SYSTEM. THIS WILL LEAD TO SNOW BECOMING WIDESPREAD OVER THE MOUNTAINS THIS EVENING. WILL ISSUE A WINTER WEATHER ADVISORY FOR THE MOUNTAINS THAT WILL RUN FROM TUESDAY EVENING THROUGH MIDNIGHT WEDNESDAY NIGHT. SNOWFALL AMOUNTS OF 2 TO 6 INCHES IS EXPECTED BY WEDNESDAY MORNING. OTHER THAN SOME MID AND UPPER LEVEL CLOUDS...NOT ENOUGH MOISTURE WILL NOT MAKE OVER THE MOUNTAINS TONIGHT FOR PRECIPITATION AND WILL KEEP THE PLAINS DRY. .LONG TERM...WE REMAIN ON WHAT APPEARS WILL BE AN ACTIVE STORM TRACK THE NEXT WEEK OR SO. GLOBAL MODELS INDICATE A SERIES OF MID/UPPER TROPOSPHERIC WAVES PROPAGATING ACROSS THE PACIFIC AND EVENTUALLY OVER THE WRN U.S. APPROXIMATELY EVERY 2-3 DAYS. THE NEXT WAVE IN THIS SERIES OF RATHER POTENT PERTURBATIONS FORMS ON THE NOSE OF +160KT JET THAT DIVES OUT OF THE PAC NORTHWEST LATE TODAY. AS AN UPPER LEVEL RIDGE AMPLIFIES OFF THE WEST COAST THIS JET BECOMES ORIENTED NORTH-SOUTH WHICH THEN CARVES OUT A SHARP SHORTWAVE TROUGH. MODELS SHOW HEIGHTS DEEPENING WITH THIS TROUGH AS IT PASSES OVER COLORADO DURING THE DAY WEDNESDAY. QG VERTICAL VELOCITY FIELDS INDICATE A BULLS EYE OF MODERATE ASCENT THRU A DEEP LAYER FM THE FRONT RANGE WEST OF BOULDER TO LIMON AROUND MIDDAY WEDNESDAY...ABOUT THE SAME TIME A COLD FRONT SLIDES THRU THE AREA FROM WYOMING. NAM AND GFS INDICATE 1-2 INCH PER HR SNOWFALL RATES IN THE HIGH COUNTRY THRU THE DAY WITH STEEP LAPSE RATES AND GOOD OROGRAPHICS. COULD SEE SNOWFALL RATES INCREASE IN THE AFTERNOON AS WINDS SHIFT TO A MORE FAVORABLE NWLY COMPONENT WITH PASSAGE OF THE TROUGH. HIGH COUNTRY SNOW TOTALS ON WEDNESDAY IN THE 3-8 INCH RANGE. ON THE PLAINS...BELIEVE SNOWFALL WILL START SLOWLY WEDNESDAY MORNING AND INITIALLY UP ALONG THE CHEYENNE RIDGE AND AGAINST THE FRONT RANGE...BUT BY LATE MORNING WITH DEVELOPMENT OF MODERATE N-NELY SFC-700MB FLOW AFTER FRONTAL PASSAGE...COULD ONCE AGAIN SEE SEVERAL HRS OF LIGHT TO MODERATE SNOWFALL WITHIN THE I-25 URBAN CORRIDOR AND OUT ACROSS THE PALMER DIVIDE. AT THIS TIME DO NOT ANTICIPATE ADVSY LEVEL SNOW AMOUNTS...BUT COULD STILL SEE 3-6 INCHES ON THE PALMER DVD...2-4 INCHES IN THE GREAT DENVER METRO AREA AND 1-2 INCH AMTS OVER NRN PORTIONS OF THE I-25 CORRIDOR AND ADJACENT COUNTIES ON THE PLAINS. EXPECT TO SEE MOST OF THIS ACCUMULATION IN ABOUT 4-6 HOURS. SYSTEM QUICKLY MOVES OUT WEDNESDAY NIGHT. THEN ITS ON TO THE NEXT STORM SYSTEM WHICH MEDIUM RANGE MODELS SHOW DIVING SEWRD OVER THE GREAT BASIN ON FRIDAY...THEN EAST ACROSS THE FOUR CORNERS REGION AND THEN ACROSS SOUTHERN COLORADO ON SATURDAY. THIS SYSTEM LOOKS EERILY SIMILAR TO THE ONE THAT DUMPED OVER A FOOT OF SNOW ON PORTIONS OF THE DENVER AREA LAST WEEK. WILL HAVE TO WATCH THIS ONE CLOSELY. BELIEVE IT OR NOT...MODELS INDICATE YET ANOTHER JUICY STORM SYSTEM FOR NEXT WEEK. WE/LL IGNORE THAT ONE FOR NOW. && .AVIATION...MID AND HIGH CLOUDS WILL STREAM ACROSS THE AREA TODAY AND TONIGHT. THERE WILL BE A CEILING AT TIMES...RANGING FROM 9000 TO 20000 FEET. LIGHT DRAINAGE WINDS WILL SHIFT TO THE NORTHWEST LATE THIS MORNING. WIND GUSTS UP TO 20 KNOTS WILL BE POSSIBLE THROUGH LATE AFTERNOON. LIGHT DRAINAGE WINDS WILL DEVELOP AGAIN THIS EVENING AND CONTINUE OVERNIGHT. && .BOU WATCHES/WARNINGS/ADVISORIES...WINTER WEATHER ADVISORY NORTHERN MOUNTAINS TUESDAY 6PM THROUGH MIDNIGHT WEDNESDAY NIGHT...ZONES 31..33 AND 34. MEIER/BAKER
Hazardous weather outlook, Mar 31, 5:27 AM MDT, 4 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE DENVER CO 527 AM MDT TUE MAR 31 2009 COZ030>051-311700- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 527 AM MDT TUE MAR 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SNOW SHOWERS WILL LINGER IN THE MOUNTAINS TODAY...MAINLY ALONG AND WEST OF THE CONTINENTAL DIVIDE. WIND GUSTS TO 50 MPH WILL CAUSE BLOWING AND DRIFTING SNOW THROUGH THE HIGHER MOUNTAIN PASSES AND EXPOSED AREAS. SNOW WILL BECOME WIDESPREAD IN THE MOUNTAINS TONIGHT AS THE NEXT STORM SYSTEM APPROACHES THE STATE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SNOWFALL WILL BE LIKELY IN THE HIGH COUNTRY ON WEDNESDAY AS THE STORM SYSTEM MENTIONED ABOVE PASSES THROUGH COLORADO. EAST OF THE MOUNTAINS RAIN AND SNOW WEDNESDAY MORNING WILL CHANGE TO SNOW BY THE AFTERNOON AS TEMPERATURES FALL WITH THE PASSAGE OF A COLD FRONT. SNOWFALL SHOULD GRADUALLY TAPER OFF DURING THE EVENING AS THIS STORM SYSTEM EXITS THE REGION. SNOW AMOUNTS WITH THIS STORM SYSTEM SHOULD RANGE FROM 8 TO 14 INCHES IN THE MOUNTAINS... TO 2 TO 7 INCHES ON THE HIGH PLAINS BY WEDNESDAY NIGHT. GUSTY WINDS WILL ALSO PRODUCE AREAS OF BLOWING SNOW ON THE HIGH MOUNTAIN PASSES. CONDITIONS SHOULD GRADUALLY IMPROVE ON THURSDAY AND FRIDAY ONLY TO TURN COLDER AGAIN WITH THE POSSIBILITY OF SIGNIFICANT SNOWFALL AND WIND AREA WIDE ON SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. MEIER/BAKER
In the hours before
Local storm report, Mar 31, 8:20 AM MDT, 1 hour 37 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
820 AM MDT TUE MAR 31 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM SNOW 14 N ELIZABETH 39.56N 104.60W
03/30/2009 M3.4 INCH ELBERT CO TRAINED SPOTTER
SNOWFALL MEASURED EARLIER THIS MORNING
0150 PM NON-TSTM WND GST FORT MORGAN 40.27N 103.79W
03/30/2009 M61.00 MPH MORGAN CO AMATEUR RADIO
0110 PM SNOW WNW SIMLA 39.14N 104.09W
03/30/2009 M2.0 INCH ELBERT CO TRAINED SPOTTER
0100 PM SNOW 11 ESE HOLYOKE 40.53N 102.10W
03/30/2009 M2.0 INCH PHILLIPS CO TRAINED SPOTTER
1050 AM SNOW 10 N ELIZABETH 39.50N 104.60W
03/30/2009 M2.0 INCH ELBERT CO TRAINED SPOTTER
1030 AM SNOW 1 S KIOWA 39.32N 104.46W
03/30/2009 M3.0 INCH ELBERT CO TRAINED SPOTTER
0945 AM SNOW 4 WNW DENVER 39.74N 105.03W
03/30/2009 M4.0 INCH DENVER CO TRAINED SPOTTER
0930 AM HEAVY SNOW 5 ESE ASPEN PARK 39.50N 105.18W
03/30/2009 M6.2 INCH JEFFERSON CO TRAINED SPOTTER
4.5 INCHES SNOWFALL PAST 75 MINUTES
0910 AM SNOW 3 S EVERGREEN 39.59N 105.34W
03/30/2009 M2.0 INCH JEFFERSON CO TRAINED SPOTTER
0840 AM SNOW 4 E PARKER 39.51N 104.69W
03/30/2009 M2.8 INCH DOUGLAS CO TRAINED SPOTTER
0827 AM SNOW 5 SE DENVER 39.68N 104.90W
03/30/2009 M2.7 INCH DENVER CO TRAINED SPOTTER
0825 AM SNOW 2 NW AURORA 39.71N 104.84W
03/30/2009 M5.0 INCH ARAPAHOE CO TRAINED SPOTTER
0825 AM SNOW 4 NE THORNTON 39.93N 104.90W
03/30/2009 M3.1 INCH ADAMS CO TRAINED SPOTTER
0825 AM SNOW 1 ENE WESTMINSTER 39.88N 105.04W
03/30/2009 M2.2 INCH ADAMS CO TRAINED SPOTTER
0815 AM SNOW 8 SE WATKINS 39.67N 104.49W
03/30/2009 M4.2 INCH ARAPAHOE CO TRAINED SPOTTER
0815 AM SNOW 1 N STRASBURG 39.75N 104.30W
03/30/2009 M3.0 INCH ADAMS CO TRAINED SPOTTER
0800 AM SNOW 2 WNW WESTMINSTER 39.89N 105.09W
03/30/2009 M1.8 INCH JEFFERSON CO TRAINED SPOTTER
0800 AM SNOW 1 NW LOUVIERS 39.48N 105.01W
03/30/2009 M0.6 INCH DOUGLAS CO TRAINED SPOTTER
0800 AM SNOW 2 ENE CASTLE ROCK 39.39N 104.82W
03/30/2009 M1.5 INCH DOUGLAS CO TRAINED SPOTTER
0745 AM SNOW GENESEE 39.69N 105.27W
03/30/2009 M3.0 INCH JEFFERSON CO TRAINED SPOTTER
0730 AM SNOW NW AURORA 39.70N 104.81W
03/30/2009 M3.0 INCH ARAPAHOE CO TRAINED SPOTTER
BLIZZARD LIKE CONDITIONS
0730 AM SNOW 1 NE CASTLE ROCK 39.39N 104.84W
03/30/2009 M2.0 INCH DOUGLAS CO AMATEUR RADIO
0730 AM SNOW 2 SSE BRECKENRIDGE 39.47N 106.03W
03/30/2009 M5.0 INCH SUMMIT CO TRAINED SPOTTER
0730 AM SNOW 3 SSE MORRISON 39.61N 105.16W
03/30/2009 M1.3 INCH JEFFERSON CO AMATEUR RADIO
0730 AM SNOW 2 NE COMMERCE CITY 39.83N 104.90W
03/30/2009 M2.0 INCH ADAMS CO AMATEUR RADIO
0715 AM SNOW 3 SW GOLDEN 39.71N 105.25W
03/30/2009 M1.6 INCH JEFFERSON CO TRAINED SPOTTER
0645 AM SNOW THORNTON 39.89N 104.96W
03/30/2009 M1.7 INCH ADAMS CO NWS EMPLOYEE
0515 AM SNOW HENDERSON 39.92N 104.87W
03/30/2009 M1.0 INCH ADAMS CO TRAINED SPOTTER
&&
JKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 4:27 AM MDT | Winter Weather Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more | 44 hr |
Nearby
Winter Storm Warnings in Colorado, 2009Every winter storm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.