Alert archive / Colorado / Winter Storm Warnings in 2011
Winter Storm Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Apr 18, 2011, 3:33 AM MDT for Grand County, Jackson County, Colorado. It took effect at Apr 18, 2011, 4:00 AM MDT. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 18, 2011, 3:33 AM MDT (09:33 UTC)
- In effect from
- Apr 18, 2011, 4:00 AM MDT
- Expired
- Apr 19, 2011, 4:14 AM MDT
- In force
- 24 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 09:36 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.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 00:00Z, 9.6 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
- 3496 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
694 WWUS45 KBOU 180933 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 333 AM MDT MON APR 18 2011 ...MORE SNOW HEADED FOR THE MOUNTAINS... .AN UPPER LEVEL DISTURBANCE COMBINED WITH A STRONG FLOW OF MOISTURE STREAMING OFF THE PACIFIC WILL BRING MORE SNOW TO THE MOUNTAINS. TEMPERATURES WILL BE WARM ENOUGH TO KEEP MOST SNOW ACCUMULATIONS ABOVE 10 THOUSAND FEET TODAY. COOLER AIR WILL MOVE INTO THE MOUNTAINS THIS EVENING CAUSING THE SNOW LEVEL TO FALL. BY TUESDAY MORNING...SNOW ACCUMULATION WILL OCCUR DOWN TO THE VALLEY FLOORS. IN ADDITION...ROADS WILL LIKELY BECOME SNOW COVERED WITH SLOW AND HAZARDOUS TRAVEL THROUGH THE MOUNTAINS THROUGH TUESDAY. COZ031-182200- /O.UPG.KBOU.WS.A.0007.110418T1800Z-110419T1800Z/ /O.NEW.KBOU.WS.W.0007.110418T1000Z-110419T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 333 AM MDT MON APR 18 2011 ...WINTER STORM WARNING IN EFFECT UNTIL NOON MDT TUESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL NOON MDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL PERSIST TODAY AND TONIGHT. THE SNOW MAY BE HEAVY AT TIMES TONIGHT WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 8 TO 16 INCHES ARE POSSIBLE WITH HEAVIER ACCUMULATION ABOVE 10 THOUSAND FEET. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. 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. && $$ COZ034-182200- /O.UPG.KBOU.WS.A.0007.110419T0000Z-110419T1800Z/ /O.NEW.KBOU.WW.Y.0020.110418T1000Z-110419T1800Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE... EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE... EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS... MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK 333 AM MDT MON APR 18 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT TUESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL NOON MDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL BECOME MORE WIDESPREAD AND HEAVIER TODAY. THE SNOW MAY BE HEAVY AT TIMES TONIGHT WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE POSSIBLE. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW...BLOWING SNOW...OR FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ033-182200- /O.UPG.KBOU.WS.A.0007.110418T1800Z-110419T1800Z/ /O.NEW.KBOU.WW.Y.0020.110418T1000Z-110419T1800Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 333 AM MDT MON APR 18 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT TUESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL NOON MDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL BECOME MORE WIDESPREAD AND HEAVIER TODAY. THE SNOW MAY BE HEAVY AT TIMES TONIGHT WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE POSSIBLE. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. 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. && $$
4 follow-up statements
700 WWUS45 KBOU 181548 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 948 AM MDT MON APR 18 2011 ...MORE SNOW HEADED FOR THE MOUNTAINS... .AN UPPER LEVEL DISTURBANCE COMBINED WITH A STRONG FLOW OF MOISTURE STREAMING OFF THE PACIFIC WILL BRING MORE SNOW TO THE MOUNTAINS. TEMPERATURES WILL BE WARM ENOUGH FOR RAIN IN THE VALLEYS AND MOST ACCUMULATING SNOW CONFINED TO ELEVATIONS ABOVE 10 THOUSAND FEET THROUGH THIS AFTERNOON. COOLER AIR WILL MOVE INTO THE MOUNTAINS THIS EVENING CAUSING THE SNOW LEVEL TO FALL. BY TUESDAY MORNING...SNOW ACCUMULATION WILL OCCUR DOWN TO THE VALLEY FLOORS. IN ADDITION...ROADS WILL LIKELY BECOME SNOW COVERED THIS EVENING WITH SLOW AND HAZARDOUS TRAVEL ACROSS THE MOUNTAINS THROUGH TUESDAY. COZ031-190000- /O.CON.KBOU.WS.W.0007.000000T0000Z-110419T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 948 AM MDT MON APR 18 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...RAIN AND SNOW WILL CONTINUE TODAY WITH THE SNOW LEVEL RANGING BETWEEN 9500 AND 10 THOUSAND FEET. BY TONIGHT... TEMPERATURES WILL TURN COLD ENOUGH FOR ALL SNOW. THE SNOW MAY BE HEAVY AT TIMES WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 8 TO 16 INCHES ARE POSSIBLE WITH HEAVIER ACCUMULATION ABOVE 10 THOUSAND FEET. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL BY THIS EVENING. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. 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. && $$ COZ033-034-190000- /O.CON.KBOU.WW.Y.0020.000000T0000Z-110419T1800Z/ 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 THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 948 AM MDT MON APR 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...RAIN AND SNOW SHOWERS WILL CONTINUE THROUGH TODAY...AND THEN TURN TO ALL SNOW AND BECOME HEAVIER THIS EVENING. THE SNOW MAY BE HEAVY AT TIMES TONIGHT WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE POSSIBLE. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE WITH SOME BLOWING SNOW OVER THE HIGHER PASSES TONIGHT INTO TUESDAY. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED LATER THIS EVENING WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ BARJENBRUCH
279 WWUS45 KBOU 182143 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 343 PM MDT MON APR 18 2011 ...MORE SNOW HEADED FOR THE MOUNTAINS... .AN UPPER LEVEL DISTURBANCE COMBINED WITH A STRONG FLOW OF MOISTURE STREAMING OFF THE PACIFIC WILL BRING MORE SNOW TO THE MOUNTAINS. TEMPERATURES WILL BE WARM ENOUGH FOR RAIN IN THE VALLEYS THIS EVENING AND MOST ACCUMULATING SNOW CONFINED TO ELEVATIONS ABOVE 9500 FEET. HOWEVER...COLDER AIR MOVING INTO THE MOUNTAINS BY MID TO LATE EVENING WILL BRING THE SNOW LEVEL DOWN...REACHING THE VALLEY FLOORS BEFORE DAYBREAK TUESDAY. ROADS WILL LIKELY BECOME SNOW COVERED BY LATE EVENING WITH SLOW AND HAZARDOUS TRAVEL ACROSS THE MOUNTAINS THROUGH TUESDAY. COZ031-190545- /O.CON.KBOU.WS.W.0007.000000T0000Z-110419T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 343 PM MDT MON APR 18 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...RAIN AND SNOW WILL CONTINUE EARLY THIS EVENING WITH THE SNOW LEVEL RANGING BETWEEN 9 THOUSAND AND 10 THOUSAND FEET. BY LATE THIS EVENING...TEMPERATURES WILL TURN COLD ENOUGH FOR ALL SNOW. THE SNOW MAY BE HEAVY AT TIMES WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 8 TO 14 INCHES ARE POSSIBLE WITH THE HEAVIER ACCUMULATION ABOVE 10 THOUSAND FEET. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL DEVELOPING THIS EVENING. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. 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. && $$ COZ033-034-190545- /O.CON.KBOU.WW.Y.0020.000000T0000Z-110419T1800Z/ 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 THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 343 PM MDT MON APR 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...RAIN AND SNOW SHOWERS WILL CONTINUE THIS EVENING...AND THEN TURN TO ALL SNOW AND BECOME HEAVIER BEFORE MIDNIGHT. THE SNOW MAY BE HEAVY AT TIMES TONIGHT WITH SNOWFALL RATES UP TO 2 INCHES PER HOUR IN THE HEAVIER SHOWERS. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE POSSIBLE. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE WITH SOME BLOWING SNOW OVER THE HIGHER PASSES TONIGHT INTO TUESDAY. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED LATER THIS EVENING WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ BARJENBRUCH
664 WWUS45 KBOU 190359 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 959 PM MDT MON APR 18 2011 ...ANOTHER ROUND OF SNOW IN THE MOUNTAINS... .AN UPPER LEVEL DISTURBANCE COMBINED WITH A STRONG FLOW OF MOISTURE STREAMING OFF THE PACIFIC WILL BRING MORE SNOW TO THE MOUNTAINS TONIGHT INTO TUESDAY MORNING. THE HEAVIEST SNOW WILL MOVE FROM THE NORTHERN MOUNTAINS ACROSS THE INTERSTATE 70 CORRIDOR DURING THE EARLY MORNING HOURS...THEN SHOWERS WILL CONTINUE INTO TUESDAY MORNING. THERE WILL BE QUITE A BIT OF MELTING IN THE VALLEYS...BUT ROADS OVER THE HIGHER PASSES WILL BECOME SLUSHY OR SNOWPACKED AND VISIBILITY WILL BE LIMITED IN THE HEAVIER SHOWERS. THROUGH EARLY MONDAY EVENING SNOW ACCUMULATIONS WERE LIMITED TO AREAS ABOVE 10 THOUSAND FEET...WITH 2 TO 4 INCHES AT HIGHER ELEVATIONS NORTH OF INTERSTATE 70. HOWEVER THE HEAVIER SNOW WAS BECOMING WIDESPREAD DURING THE LATE EVENING HOURS AS TEMPERATURES COOLED. COZ031-191200- /O.CON.KBOU.WS.W.0007.000000T0000Z-110419T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 959 PM MDT MON APR 18 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...SNOW WILL CONTINUE OVERNIGHT...THEN DIMINISH TO SHOWERS TUESDAY MORNING. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 8 TO 14 INCHES ARE POSSIBLE WITH THE HEAVIER ACCUMULATION ABOVE 10 THOUSAND FEET. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED WITH SLOW AND HAZARDOUS TRAVEL DEVELOPING THIS EVENING. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. 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. && $$ COZ033-034-191200- /O.CON.KBOU.WW.Y.0020.000000T0000Z-110419T1800Z/ 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 THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 959 PM MDT MON APR 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TUESDAY. * TIMING...SNOW WILL BE HEAVY AT TIMES DURING THE NIGHT...THEN DIMINISH TO SHOWERS TUESDAY MORNING. * ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE POSSIBLE. WINDS MAY GUST UP TO 40 MPH ABOVE TIMBERLINE WITH SOME BLOWING SNOW OVER THE HIGHER PASSES TONIGHT INTO TUESDAY. * MAIN IMPACT...ROADS ARE EXPECTED TO BECOME SNOW AND SLUSH COVERED LATER THIS EVENING WITH SLOW AND HAZARDOUS TRAVEL. VISIBILITIES MAY BE REDUCED TO LESS THAN ONE QUARTER MILE IN AREAS OF HEAVY SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ GIMMESTAD
066 WWUS45 KBOU 191014 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 414 AM MDT TUE APR 19 2011 COZ031-191115- /O.CAN.KBOU.WS.W.0007.000000T0000Z-110419T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 414 AM MDT TUE APR 19 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER STORM WARNING. SNOW HAS DECREASED IN INTENSITY THIS MORNING. SNOW SHOWERS WILL CONTINUE THROUGH THE DAY TODAY...HOWEVER ADDITIONAL SNOWFALL AMOUNTS WILL BE LESS THAN 3 INCHES. THEREFORE...THE WINTER STORM WARNING HAS BEEN CANCELLED. $$ COZ033-034-191115- /O.CAN.KBOU.WW.Y.0020.000000T0000Z-110419T1800Z/ 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 THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 414 AM MDT TUE APR 19 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS DECREASED IN INTENSITY THIS MORNING. SNOW SHOWERS WILL CONTINUE THROUGH THE DAY TODAY...HOWEVER ADDITIONAL SNOWFALL AMOUNTS WILL BE LESS THAN 3 INCHES. THEREFORE...THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 3:33 AM MDT | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 25 hr |
Nearby
Winter Storm Warnings in Colorado, 2011Every winter storm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.