Alert archive / Colorado / Winter Storm Warnings in 2008
Winter Storm Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Apr 30, 2008, 4:50 PM MDT for 9 counties in Colorado. It took effect at May 1, 2008, 3:00 AM MDT. It was in force for 37 hr. 18 reports 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
- Apr 30, 2008, 4:50 PM MDT (22:50 UTC)
- In effect from
- May 1, 2008, 3:00 AM MDT
- Expired
- May 2, 2008, 4:00 PM MDT
- In force
- 37 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO
The radar
The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 22:55 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 |
|---|---|---|---|
| May 1, 8:00 AM MDT | SNOW 1.6 | 1 Se Breckenridge, CO | |
| May 1, 8:00 AM MDT | SNOW 5 | Eldora, CO | |
| May 1, 8:21 AM MDT | SNOW 1.2 | Evergreen, CO | |
| May 1, 8:50 AM MDT | SNOW 1 | 7 Sw Boulder, CO | |
| May 1, 8:50 AM MDT | SNOW 1.5 | 5 Ssw Longmont, CO | |
| May 1, 9:15 AM MDT | SNOW 4.8 | Aspen Springs, CO | |
| May 1, 9:30 AM MDT | SNOW 3.5 | 4 Ene Nederland, CO | |
| May 1, 9:49 AM MDT | SNOW 1 | Arvada, CO | |
| May 1, 9:59 AM MDT | SNOW 5 | 3 Ne Bergen Park, CO | |
| May 1, 10:03 AM MDT | SNOW 4 | 5 W Evergreen, CO | |
| May 1, 10:22 AM MDT | SNOW 4.8 | 3 Sw Golden, CO | |
| May 1, 10:32 AM MDT | SNOW 4 | 3 Ne Bailey, CO | |
| May 1, 10:50 AM MDT | SNOW 4.8 | 1 Nw Evergreen, CO | |
| May 1, 11:41 AM MDT | SNOW 3 | 3 N Bailey, CO | |
| May 1, 11:49 AM MDT | SNOW 4 | 6 Sw Evergreen, CO | |
| May 1, 4:00 PM MDT | SNOW 2 | Fraser, CO | |
| May 1, 6:00 PM MDT | SNOW 0.7 | Boulder, CO | |
| May 1, 7:00 PM MDT | SNOW 3 | 1 S Evergreen, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.8 hours before the alert went out and 213 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
- 3424 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 55 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 302250 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 450 PM MDT WED APR 30 2008 COZ031-033-034-010700- /O.NEW.KBOU.WS.W.0009.080501T0900Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 450 PM MDT WED APR 30 2008 ...WINTER STORM WARNING IN EFFECT FROM 3 AM THURSDAY TO 6 AM MDT FRIDAY FOR THE MOUNTAIN AREAS IN NORTH CENTRAL COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING...WHICH IS IN EFFECT FROM 3 AM THURSDAY TO 6 AM MDT FRIDAY. RAIN AND SNOW SHOWERS WILL DEVELOP THIS EVENING IN THE MOUNTAINS OF NORTH CENTRAL COLORADO FOLLOWING THE PASSAGE OF A STRONG PACIFIC COLD FRONT. THESE EVENING SHOWERS MAY BE ACCOMPANIED BY A FEW THUNDERSTORMS CAPABLE OF PERIODS OF HEAVY SNOWFALL AND STRONG GUSTY WINDS. AFTER MIDNIGHT...SNOWFALL IS EXPECTED TO BECOME MORE WIDESPREAD IN THE HIGH COUNTRY AS THE MAIN UPPER LEVEL STORM SYSTEM MOVES OVER WYOMING AND NORTHERN COLORADO. SNOWFALL SHOULD THEN CONTINUE HEAVY AT TIMES THROUGH THURSDAY NIGHT WITH THE GREATEST SNOW ACCUMULATION LIKELY ON WEST AND NORTHWEST FACING MOUNTAIN SLOPES GENERALLY ALONG AND NORTH OF THE INTERSTATE 70 CORRIDOR. NORTHWEST WINDS OF 25 TO 40 MPH WILL ALSO PRODUCE AREAS OF BLOWING SNOW...PARTICULARLY ON THE HIGH MOUNTAIN PASSES. SNOW ACCUMULATION BY LATE THURSDAY AFTERNOON WILL RANGE FROM 5 TO 9 INCHES...WITH AN ADDITIONAL 3 TO 7 INCHES OF SNOW THURSDAY NIGHT. TOTAL SNOW ACCUMULATION WITH THIS WINTER-LIKE STORM SYSTEM WILL RANGE FROM 8 TO 16 INCHES. HIGH COUNTRY ROADS ARE LIKELY TO BECOME ICY AND SNOW COVERED BY THURSDAY MORNING...WITH SNOW TIRES OR TIRE CHAINS POSSIBLY REQUIRED ON MANY OF THE HIGH MOUNTAIN PASSES. PERIODS OF HEAVY SNOW AND BLOWING SNOW MAY ALSO SIGNIFICANTLY REDUCE VISIBILITIES. 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. $$ BAKER
9 follow-up statements
000 WWUS45 KBOU 010650 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1250 AM MDT THU MAY 1 2008 COZ031-033-034-011300- /O.CON.KBOU.WS.W.0009.080501T0900Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 1250 AM MDT THU MAY 1 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY. SNOW SHOWERS WILL BECOME WIDESPREAD OVERNIGHT IN THE MOUNTAINS OF NORTH CENTRAL COLORADO. A THUNDERSTORM OR TWO IS ALSO POSSIBLE TONIGHT PRODUCING PERIODS OF HEAVY SNOWFALL AND STRONG GUSTY WINDS. SNOWFALL WILL CONTINUE THROUGH THURSDAY NIGHT WITH THE GREATEST SNOW ACCUMULATION OVER THE HIGHER ELEVATIONS AND NORTHWEST FACING SLOPES ALONG AND NORTH OF INTERSTATE 70. NORTHWEST WINDS OF 25 TO 40 MPH WILL ALSO PRODUCE AREAS OF BLOWING SNOW. STORM TOTAL SNOW ACCUMULATIONS BY FRIDAY MORNING WILL RANGE FROM 8 TO 16 INCHES. HIGH COUNTRY ROADS ARE LIKELY TO BECOME ICY AND SNOW COVERED BY THURSDAY MORNING...WITH SNOW TIRES OR TIRE CHAINS POSSIBLY REQUIRED ON MANY OF THE HIGH MOUNTAIN PASSES. PERIODS OF HEAVY SNOW AND BLOWING SNOW MAY ALSO SIGNIFICANTLY REDUCE VISIBILITIES. 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. $$ GIMMESTAD
000 WWUS45 KBOU 011205 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 605 AM MDT THU MAY 1 2008 COZ031-033-034-012015- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 605 AM MDT THU MAY 1 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY. SNOW WILL CONTINUE THROUGH TONIGHT IN THE NORTH CENTRAL COLORADO MOUNTAINS AND WILL BE HEAVY AT TIMES. THE GREATEST SNOW ACCUMULATION IS EXPECTED OVER THE HIGHER ELEVATIONS AND NORTHWEST FACING SLOPES ALONG AND NORTH OF INTERSTATE 70. NORTHWEST WINDS WILL INCREASE BY TONIGHT WITH GUSTS AS HIGH AS 55 MPH ABOVE TIMBERLINE... PRODUCING AREAS OF BLOWING SNOW. STORM TOTAL SNOW ACCUMULATIONS BY FRIDAY MORNING WILL RANGE FROM 8 TO 16 INCHES. HIGH COUNTRY ROADS WILL BECOME ICY AND SNOW COVERED THIS MORNING... WITH SNOW TIRES OR TIRE CHAINS POSSIBLY REQUIRED ON MANY OF THE HIGH MOUNTAIN PASSES. PERIODS OF HEAVY SNOW AND BLOWING SNOW MAY ALSO SIGNIFICANTLY REDUCE VISIBILITIES. 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. $$ GIMMESTAD
000 WWUS45 KBOU 011856 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1256 PM MDT THU MAY 1 2008 COZ031-033-034-020300- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 1256 PM MDT THU MAY 1 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY. SNOW WILL CONTINUE THROUGH TONIGHT IN THE NORTH CENTRAL COLORADO MOUNTAINS AND WILL BE HEAVY AT TIMES. THE GREATEST SNOW ACCUMULATION IS EXPECTED OVER THE HIGHER ELEVATIONS AND NORTHWEST FACING SLOPES ALONG AND NORTH OF INTERSTATE 70. NORTHWEST WINDS WILL INCREASE BY TONIGHT WITH GUSTS AS HIGH AS 55 MPH ABOVE TIMBERLINE... PRODUCING AREAS OF BLOWING SNOW. STORM TOTAL SNOW ACCUMULATIONS BY FRIDAY MORNING WILL RANGE FROM 8 TO 16 INCHES. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED...WITH SNOW TIRES OR TIRE CHAINS REQUIRED ON LOVELAND PASS. PERIODS OF HEAVY SNOW AND BLOWING SNOW MAY ALSO REDUCE VISIBILITIES. REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. $$ LESZCYNSKI
000 WWUS45 KBOU 012138 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 338 PM MDT THU MAY 1 2008 COZ031-033-034-020545- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 338 PM MDT THU MAY 1 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY. MODERATE SNOW WAS FALLING IN THE MOUNTAINS THIS AFTERNOON. SNOW WILL CONTINUE THROUGH TONIGHT IN THE NORTH CENTRAL COLORADO MOUNTAINS AND MAY BE HEAVY AT TIMES. THE GREATEST SNOW ACCUMULATION IS EXPECTED OVER THE HIGHER ELEVATIONS AND NORTHWEST FACING SLOPES ALONG AND NORTH OF INTERSTATE 70. NORTHWEST WINDS WILL INCREASE BY TONIGHT WITH GUSTS AS HIGH AS 50 MPH ABOVE TIMBERLINE...PRODUCING AREAS OF BLOWING SNOW. STORM TOTAL SNOW ACCUMULATIONS BY FRIDAY MORNING WILL RANGE FROM 8 TO 16 INCHES. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED...WITH SNOW TIRES OR TIRE CHAINS REQUIRED ON LOVELAND PASS. PERIODS OF HEAVY SNOW AND BLOWING SNOW MAY ALSO REDUCE VISIBILITIES. 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. $$
000 WWUS45 KBOU 020443 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1043 PM MDT THU MAY 1 2008 COZ031-033-034-021200- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 1043 PM MDT THU MAY 1 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT FRIDAY. AREAS SNOW WILL CONTINUE TO FALL IN THE MOUNTAINS THROUGH THE OVERNIGHT HOURS. THE GREATEST SNOW ACCUMULATION IS EXPECTED OVER THE HIGHER ELEVATIONS AND NORTHWEST FACING SLOPES ALONG AND NORTH OF INTERSTATE 70. NORTHWEST WINDS WILL INCREASE BY TONIGHT WITH GUSTS AS HIGH AS 65 MPH ABOVE TIMBERLINE...PRODUCING AREAS OF BLOWING SNOW AND WHITE OUT CONDITIONS. STORM TOTAL SNOW ACCUMULATIONS BY FRIDAY MORNING WILL RANGE FROM 8 TO 16 INCHES. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED. CHAINS LAWS ARE IN EFFECT FOR MANY PASSES ACROSS CENTRAL COLORADO. PERIODS OF HEAVY SNOW AND BLOWING SNOW WILL ALSO REDUCE VISIBILITIES. REMEMBER...A WINTER STORM WARNING MEANS HAZARDOUS WINTER WEATHER CONDITIONS ARE IMMINENT OR HIGHLY LIKELY. SIGNIFICANT SNOW ACCUMULATIONS ARE OCCURRING OR EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. $$
000 WWUS45 KBOU 021034 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 434 AM MDT FRI MAY 2 2008 COZ031-033-034-021845- /O.EXT.KBOU.WS.W.0009.000000T0000Z-080502T2200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 432 AM MDT FRI MAY 2 2008 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON... THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON. SNOW WILL CONTINUE IN THE NORTHERN COLORADO MOUNTAINS TODAY. THE SNOW MAY BE HEAVY AT TIMES THIS MORNING...ESPECIALLY FROM ROCKY MOUNTAIN NATIONAL PARK NORTHWARD. ADDITIONAL SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE EXPECTED TODAY. THE SNOW WILL BE DECREASING AS THE DAY GOES ON...BUT VERY STRONG NORTHWEST WINDS WILL BLOW OVER THE HIGHER ELEVATIONS WITH GUSTS AS HIGH AS 80 MPH ABOVE TIMBERLINE IN THE FRONT RANGE. THESE WINDS WILL PRODUCE BLIZZARD CONDITIONS IN HIGHER EXPOSED AREAS...ESPECIALLY AROUND BERTHOUD AND LOVELAND PASSES. STORM TOTAL SNOW ACCUMULATIONS FROM WEDNESDAY NIGHT THROUGH TODAY WILL RANGE FROM 10 TO 20 INCHES. A WIND SENSOR ABOVE TIMBERLINE NEAR BERTHOUD PASS RECORDED SUSTAINED WINDS OF 65 MPH WITH GUSTS TO 80 MPH AT 4 AM. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED. CHAINS LAWS ARE IN EFFECT FOR SOME HIGHWAYS...AND LOVELAND PASS WAS CLOSED EARLY THIS MORNING. $$ GIMMESTAD
000 WWUS45 KBOU 021342 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 742 AM MDT FRI MAY 2 2008 COZ048-050-051-022145- /O.NEW.KBOU.BZ.W.0002.080502T1342Z-080502T2200Z/ LOGAN COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- INCLUDING...CROOK...MERINO...STERLING...PEETZ...JULESBURG... OVID...SEDGWICK...AMHERST...HAXTUN...HOLYOKE 742 AM MDT FRI MAY 2 2008 ...BLIZZARD WARNING IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON. AT 730 AM MDT...THE SEDGWICK COUNTY SHERIFF REPORTED MULTIPLE ACCIDENTS THIS MORNING. THE COMBINATION OF STRONG WINDS AND SNOW IN THE AREA HAVE RESULTED IN ZERO VISIBILITIES. CONDITIONS ARE NOT EXPECTED TO IMPROVE UNTIL LATE THIS AFTERNOON. SNOW ACCUMULATIONS OF 1 TO 4 INCHES ARE EXPECTED TODAY WITH EXTENSIVE BLOWING AND DRIFTING SNOW. A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE OCCURRING OR IMMINENT. SUSTAINED WIND AND/OR FREQUENT WIND GUSTS OF 35 MPH OR HIGHER WILL COMBINE WITH CONSIDERABLE FALLING AND BLOWING SNOW TO PRODUCE WIDESPREAD VISIBILITIES BELOW ONE QUARTER OF A MILE. TRAVEL WILL BE EXTREMELY DANGEROUS AND IS DISCOURAGED IN THESE WHITEOUT CONDITIONS. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. $$ COZ031-033-034-022145- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T2200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 742 AM MDT FRI MAY 2 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON. SNOW WILL CONTINUE IN THE NORTHERN COLORADO MOUNTAINS TODAY. THE SNOW MAY BE HEAVY AT TIMES THIS MORNING...ESPECIALLY FROM ROCKY MOUNTAIN NATIONAL PARK NORTHWARD. ADDITIONAL SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE EXPECTED TODAY. THE SNOW WILL BE DECREASING AS THE DAY GOES ON...BUT VERY STRONG NORTHWEST WINDS WILL BLOW OVER THE HIGHER ELEVATIONS WITH GUSTS AS HIGH AS 80 MPH ABOVE TIMBERLINE IN THE FRONT RANGE. THESE WINDS WILL PRODUCE BLIZZARD CONDITIONS IN HIGHER EXPOSED AREAS...ESPECIALLY AROUND BERTHOUD AND LOVELAND PASSES. STORM TOTAL SNOW ACCUMULATIONS FROM WEDNESDAY NIGHT THROUGH TODAY WILL RANGE FROM 10 TO 20 INCHES. A WIND SENSOR ABOVE TIMBERLINE NEAR BERTHOUD PASS RECORDED SUSTAINED WINDS OF 65 MPH WITH GUSTS TO 80 MPH AT 4 AM. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED. CHAINS LAWS ARE IN EFFECT FOR SOME HIGHWAYS...AND LOVELAND PASS WAS CLOSED EARLY THIS MORNING. $$
000 WWUS45 KBOU 021715 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1115 AM MDT FRI MAY 2 2008 COZ048-050-051-022200- /O.CON.KBOU.BZ.W.0002.000000T0000Z-080502T2200Z/ LOGAN COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- INCLUDING...CROOK...MERINO...STERLING...PEETZ...JULESBURG... OVID...SEDGWICK...AMHERST...HAXTUN...HOLYOKE 1115 AM MDT FRI MAY 2 2008 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON... A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON. NUMEROUS ROAD CLOSURES HAVE OCCURRED OVER SEDGWICK AND PHILLIPS COUNTIES THIS MORNING DUE TO BLIZZARD CONDITIONS. POWER OUTAGES HAVE ALSO BEEN REPORTED. SIMILAR CONDITIONS ARE POSSIBLE OVER EASTERN LOGAN COUNTY...BUT THE WESTERN HALF WILL BE DRIER BUT CONTINUED VERY WINDY. CONDITIONS ARE NOT EXPECTED TO IMPROVE UNTIL LATE THIS AFTERNOON. NORTHWEST WINDS 20 TO 40 MPH WILL BE COMMON WITH GUSTS TO 65 MPH POSSIBLE. SNOW ACCUMULATIONS OF 1 TO 4 INCHES ARE ALSO EXPECTED ...MAINLY OVER SEDGWICK AND PHILLIPS COUNTIES...ALONG WITH EXTENSIVE BLOWING SNOW. A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE OCCURRING OR IMMINENT. SUSTAINED WIND AND/OR FREQUENT WIND GUSTS OF 35 MPH OR HIGHER WILL COMBINE WITH CONSIDERABLE FALLING AND BLOWING SNOW TO PRODUCE WIDESPREAD VISIBILITIES BELOW ONE QUARTER OF A MILE. TRAVEL WILL BE EXTREMELY DANGEROUS AND IS DISCOURAGED IN THESE WHITEOUT CONDITIONS. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. $$ COZ031-033-034-022200- /O.CON.KBOU.WS.W.0009.000000T0000Z-080502T2200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...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 1115 AM MDT FRI MAY 2 2008 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS AFTERNOON. SNOW WILL CONTINUE IN THE NORTHERN COLORADO MOUNTAINS TODAY. THE SNOW MAY BE HEAVY AT TIMES...ESPECIALLY FROM ROCKY MOUNTAIN NATIONAL PARK NORTHWARD. ADDITIONAL SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE EXPECTED. THE SNOW WILL BE DECREASING AS THE DAY GOES ON...BUT VERY STRONG NORTHWEST WINDS WILL BLOW OVER THE HIGHER ELEVATIONS WITH GUSTS AS HIGH AS 80 MPH ABOVE TIMBERLINE IN THE FRONT RANGE. THESE WINDS WILL PRODUCE BLIZZARD CONDITIONS IN HIGHER EXPOSED AREAS...ESPECIALLY AROUND BERTHOUD AND LOVELAND PASSES. STORM TOTAL SNOW ACCUMULATIONS FROM WEDNESDAY NIGHT THROUGH TODAY WILL RANGE FROM 10 TO 20 INCHES. A WIND SENSOR ABOVE TIMBERLINE NEAR BERTHOUD PASS RECORDED SUSTAINED WINDS OF 70 MPH WITH GUSTS TO 85 MPH AT 930 AM. MANY HIGH COUNTRY ROADS ARE AND SNOW COVERED. CHAINS LAWS ARE IN EFFECT FOR SOME HIGHWAYS...AND LOVELAND PASS WAS CLOSED EARLY THIS MORNING. $$
000 WWUS45 KBOU 022139 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 339 PM MDT FRI MAY 2 2008 COZ031-033-034-022245- /O.EXP.KBOU.WS.W.0009.000000T0000Z-080502T2200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 339 PM MDT FRI MAY 2 2008 ...WINTER STORM WARNING WILL EXPIRE AT 4 PM MDT THIS AFTERNOON... THE WINTER STORM WARNING WILL EXPIRE AT 4 PM MDT THIS AFTERNOON. LIGHT SNOW AND GUSTY WINDY CONDITIONS GRADUALLY DECREASE THROUGH THIS EVENING...WITH STEADILY IMPROVING CONDITIONS OVERNIGHT. THEREFORE THE WINTER STORM WARNING WILL BE ALLOWED TO EXPIRE AT 4 PM MDT. $$ COZ048-050-051-030000- /O.EXT.KBOU.BZ.W.0002.000000T0000Z-080503T0000Z/ LOGAN COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- INCLUDING...CROOK...MERINO...STERLING...PEETZ...JULESBURG... OVID...SEDGWICK...AMHERST...HAXTUN...HOLYOKE 339 PM MDT FRI MAY 2 2008 ...BLIZZARD WARNING NOW IN EFFECT UNTIL 6 PM MDT THIS AFTERNOON... THE BLIZZARD WARNING IS NOW IN EFFECT UNTIL 6 PM MDT THIS AFTERNOON. STRONG NORTHWESTERLY WINDS AND LIGHT SNOW ARE EXPECTED TO CONTINUE THROUGH THE REMAINDER OF THE AFTERNOON. THEREFORE THE BLIZZARD WARNING HAS BEEN EXTENDED UNTIL 6 PM MDT. NUMEROUS ROAD CLOSURES HAVE OCCURRED OVER SEDGWICK AND PHILLIPS COUNTIES TODAY DUE TO BLIZZARD CONDITIONS. POWER OUTAGES HAVE ALSO BEEN REPORTED. SIMILAR CONDITIONS ARE POSSIBLE OVER EASTERN LOGAN COUNTY...BUT THE WESTERN HALF WILL BE DRIER BUT CONTINUED VERY WINDY. NORTHWEST WINDS 20 TO 40 MPH WILL BE COMMON WITH GUSTS TO 65 MPH POSSIBLE THROUGH 6 PM. ADDITIONAL SNOW ACCUMULATIONS OF AN INCH OR SO ARE POSSIBLE. CONDITIONS ARE EXPECTED TO STEADILY IMPROVE OVERNIGHT AS THE STORM SYSTEM MOVES FURTHER EAST. A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE OCCURRING OR IMMINENT. SUSTAINED WIND AND/OR FREQUENT WIND GUSTS OF 35 MPH OR HIGHER WILL COMBINE WITH CONSIDERABLE FALLING AND BLOWING SNOW TO PRODUCE WIDESPREAD VISIBILITIES BELOW ONE QUARTER OF A MILE. TRAVEL WILL BE EXTREMELY DANGEROUS AND IS DISCOURAGED IN THESE WHITEOUT CONDITIONS. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. $$
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 Apr 30, 3:40 PM MDT, 1 hour 10 minutes earlier.
Area forecast discussion, Apr 30, 3:40 PM MDT, 1 hour 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT WED APR 30 2008 SHORT TERM...SOUTHWEEST WINDS FINALLY MIXED DOWN ACROSS PLAINS... THOUGH GUSTS BEGINNING TO REACH RED FLAG CRITERIA. HUMIDITY READINGS REMAIN LOW...WILL CONTINUE RED FLAG WARNING THROUGH 02Z. WINDS DECREASING AND BECOMING WESTERLY BY 03Z...SO CONDITIONS SHOULD IMPROVE. SOME CUMULUS BEGINNING TO FORM ACROSS PLAINS. WITH LAPSE RATES AROUND 8 C/KM...WILL KEEP THE SLIGHT CHANCE FOR HIGH BASED STORMS THIS EVENING. SATELLITE LOOPS SHOWING UPPER TROUGH OVER NORTHERN GREAT BASIN BEGINNING TO MOVE INTO UTAH. MODELS DEVELOP A STRONG UPPER LOW OVER UTAH THIS EVENING AS TROUGH PUSHES TOWARD COLORADO. MODELS BRING UPPER LOW ACROSS AREA TONIGHT AND THURSDAY. MOISTURE INCREASES ACROSS MOUNTAINS WITH GOOD OROGRAPHICS AND COLD AIR. QG VERTICAL VELOCITY PROGS SHOW GOOD ASCENT WITH SYSTEM. LOOKS LIKE A GOOD BOUT OF SNOW FOR THE MOUNTAINS THROUGH MUCH OF THE PERIOD. WILL ISSUE WINTER STORM WARNING FOR MOUNTAINS...BEGINNING AT 09Z. MOST MOUNTAIN LOCATIONS SHOULD SEE UP TO A FOOT OF SNOW BY WEDNESDAY EVENING. AS FOR PLAINS...COLD FRONT TO MOVE ACROSS AREA BY 09Z...THOUGH MAY BE EARLIER IF CONVECTION MATERIALIZES. MODELS SHOWED AN AREA OF MOISTURE CONVERGENCE ALONG WYOMING BORDER OVERNIGHT AS WELL AS SOME QPF. UPPED POPS TO LIKELY IN THIS AREA AS A RESULT...KEPT THE CHANCE POPS ELSEWHERE. WILL KEEP THE MIX OF RAIN AND SNOW AS BUFFER SOUNDINGS SHOWING SNOW LEVEL AROUND 6000 FEET BY 12Z. FOR THURSDAY...BOTH THE NAM AND GFS SHOW SURFACE WINDS BECOMING NORTHWEST BY 18Z. THOUGH THIS MAY LIMIT PRECIP CHANCES...THERE IS DECENT QG ASCENT ALONG WITH GOOD LAPSE RATES. WILL INCREASE THE POPS TO LIKELY ACROSS MOST OF PLAINS. BUFFER SOUNDINGS SHOW TEMPERATURES IN THE LOWER TO MID 40S ACROSS MUCH OF AREA THROUGH THE DAY. SO PRECIP SHOULD BE MOSTLY RAIN...BUT CANT RULE OUT SOME SNOW MIXED IN. TEMPERATURE AND THICKNESS PROGDS SHOWING HIGHS ACROSS PLAINS E ABOUT 30-35 DEGEES COLDER THAN TODAYS READINGS. CURRENT TEMPERATURE GRIDS ARE ON TRACK...AND ARE SIMILAR TO GUIDANCE. WILL CHANGE LITTLE. LONG TERM...AT 00Z EARLY THURSDAY EVENING...MODELS HAVE THE UPPER CIRCULATION NEAR THE NORTHEAST CORNER OF COLORADO. THE 12Z NAM HAS COME SOUTHWARD SOMEWHAT FROM YESTERDAYS 12Z RUN. THE GFS HAS CHANGED LITTLE FROM YESTERDAYS 12Z RUN. THE ECMWF HAS THE CENTER VERY SIMILAR TO THE GFS. ONE SIGNIFICANT CHANGE FROM YESTERDAY...ON ALL THREE MODELS...IS HOW THE UPPER CIRCULATION STALLS SOMEWHAT JUST EAST OF THE FORECAST AREA INTO FRIDAY MORNING. ON FRIDAY NORTHEASTERLY FLOW ALOFT IS OVER THE FORECAST AREA. FRIDAY NIGHT...ITS LIGHT WEST-NORTHWESTERLY. ON SATURDAY WEAK UPPER RIDGING MOVES OVER...WITH LIGHT WEST-SOUTHWESTERLY FLOW ALOFT. THE QG VERTICAL VELOCITY FIELDS HAVE UPWARD MOTION OVER THE NORTHEAST CORNER EARLY THURSDAY EVENING ...OTHERWISE THEY HAVE ALL DOWNWARD MOTION FOR THE FORECAST AREA THROUGH FRIDAY NIGHT. THE BOUNDARY LAYER FLOW IS ALL NORTHWESTERLY THURSDAY NIGHT THROUGH FRIDAY EVENING. ON FRIDAY...THE SPEEDS ARE PRETTY STRONG..ESPECIALLY THE FURTHER EAST YOU GO ON THE PLAINS. THE PRESSURE GRADIENT IS FAIRLY WEAK SATURDAY SO NORMAL DIURNAL BOUNDARY LAYER WINDS ARE A GOOD BET. FOR MOISTURE...THE GFS HAS PRETTY DEEP MOISTURE OVER MUCH OF THE FORECAST AREA THURSDAY NIGHT. THE NAM DECREASES IT OVER THE MOUNTAINS AFTER 06Z. BOTH SHOW DRYING IN THE LOW LEVELS FOR THE FOOTHILLS AND IMMEDIATE PLAINS THURSDAY NIGHT. ON FRIDAY...MOISTURE STAYS PRETTY DEEP OVER THE EAST ON BOTH MODELS...THERE IS SOME LINGERING OVER THE MOUNTAINS...ANY MORE DOWNSLOPING DRYNESS FROM THE DIVIDED EASTWARD INTO THE IMMEDIATE PLAINS. BY FRIDAY EVENING...THE CLOUD SHIELD FROM THE UPPER CIRCULATION MOVES EASTWARD OUT OF THE FORECAST AREA. THERE IS A BIT OF MID AND UPPER LEVEL MOISTURE FOR THE FORECAST AREA FRIDAY NIGHT AND SATURDAY. LATE SATURDAY... MOISTURE INCREASES FORM THE WEST. THE QPF FIELDS HAVE SOME MEASURABLE PRECIPITATION FOR MUCH OF THE FORECAST AREA THURSDAY NIGHT INTO FRIDAY. THE NAM HAS A BIT MORE. FOR POPS...WILL UP MOUNTAIN POPS THURSDAY NIGHT AND GO WITH WARNING HIGHLIGHTS AS PER SHORT TERM FORECASTER. THERE IS DECENT MOISTURE AND DECENT OROGRAPHIC ENHANCEMENT. THE SYNOPTIC SCALE ENERGY IS OF THE DOWNWARD VARIETY AND THE LAPSE RATES ARE NOT VERY STEEP OVERNIGHT THURSDAY BUT THE SNOW MODEL STILL YIELDED FROM 3 TO 8 INCHES IN THE HIGH MOUNTAINS ZONES. THAT COUPLED WITH THURSDAYS DAYTIME TOTALS...WARRANTS KEEPING THE WARNING GOING THROUGH 12Z FRIDAY MORNING. WILL UP POPS A BIT FRIDAY AND KEEP THEM LINGERING INTO THE EVENING AS PER THE SPEED OF THE SYSTEM. FOR THE PLAINS AND FOOTHILLS...WILL MAINLY STICK WITH CHANCES OF SNOW THURSDAY NIGHT. THE BOUNDARY LAYER DOWNSLOPING IS HARD TO IGNORE. WILL GO WITH LIKELYS FOR THE NORTHEAST CORNER. WILL KEEP SOME POPS GOING WELL INTO FRIDAY...THE BEST OVER THE NORTHEAST BORDER. LATER FRIDAY EVENING THROUGH SATURDAY NIGHT WILL GO WITH NO POPS FOR ALL THE FORECAST AREA. FOR TEMPERATURES...FRIDAYS HIGHS ARE WELL BELOW NORMALS...AND ABOUT 1-2.5 C WARMER THAN THURSDAYS. SATURDAYS HIGHS WARM UP 5-8 C OVER FRIDAYS. FOR THE LATER DAYS...SUNDAY THROUGH WEDNESDAY...THERE IS SOUTHWESTERLY FLOW ALOFT SUNDAY AND MONDAY. ON TUESDAY AND WEDNESDAY AND UPPER TROUGH IS PROGGED INTO COLORADO. TEMPERATURES WARM-UP CLOSE TO SEASONAL NORMALS THROUGH MUCH OF THE PERIOD. WILL GO WITH LIMITED POPS IN THE HIGH MOUNTAINS SATURDAY NIGHT THROUGH WEDNESDAY. WILL HAVE LOW POPS IN THE PLAINS MONDAY THROUGH TUESDAY. && .BOU WATCHES/WARNINGS/ADVISORIES...RED FLAG WARNING FOR VERY LOW HUMIDITIES AND GUSTY WINDS ALONG THE FRONT RANGE AND PALMER DIVIDE (ZONES 238 THROUGH 241...243...245 THRU 247) THRU 8 PM THIS EVENING. ...WINTER STORM WARNING THURSDAY AND THURSDAY NIGHT FOR ZONES 31..33..34. && DL/RJK
Hazardous weather outlook, Apr 30, 11:01 AM MDT, 5 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1101 AM MDT WED APR 30 2008 COZ030>051-011200- 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- 1101 AM MDT WED APR 30 2008 ...RED FLAG WARNING FOR VERY LOW HUMIDITIES AND GUSTY WINDS ALONG THE FRONT RANGE AND PALMER DIVIDE FROM NOON TODAY THRU 8 PM THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT VERY DRY CONDITIONS WILL CONTINUE ACROSS THE PLAINS THIS AFTERNOON AND EVENING. GUSTY WINDS AND WARM TEMPERATURES WILL COMBINE WITH THE DRY FUELS ALONG THE FRONT RANGE AND OVER THE PALMER DIVIDE TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS INTO THE EARLY EVENING HOURS. BY TONIGHT A STRONG COLD FRONT WILL MOVE ACROSS NORTHEAST COLORADO AND BRING MUCH COOLER TEMPERATURES ALONG WITH GUSTY NORTH WINDS AND A CHANCE OF SHOWERS AND A FEW THUNDERSTORMS. IN THE MOUNTAINS SCATTERED SNOW SHOWERS WILL DEVELOP THIS EVENING...INCREASING IN COVERAGE AFTER MIDNIGHT. SNOW ACCUMULATIONS OF UP TO 5 INCHES CAN BE EXPECTED BY THURSDAY MORNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SNOW IS EXPECTED IN THE MOUNTAINS THURSDAY INTO FRIDAY MORNING WITH THIS NEXT STORM. SNOWFALL AMOUNTS OF 6 TO 12 INCHES CAN BE EXPECTED BY FRIDAY MORNING IN THE HIGH COUNTRY. THE PLAINS AND FOOTHILLS CAN EXPECTED A GOOD CHANCE OF PRECIPITATION. TEMPERATURES WILL BE MUCH COLDER ON THURSDAY. PRECIPITATION ACROSS THE NORTHEAST COLORADO PLAINS ON THURSDAY MAY FALL AS EITHER RAIN OR SNOW. SNOW ACCUMULATIONS WILL NOT BE SIGNIFICANT. THE STORM WILL MOVE OUT SLOWLY ON FRIDAY WITH PRETTY STRONG NORTHWESTERLY WINDS OVER THE PLAINS. SATURDAY THROUGH TUESDAY...TEMPERATURES WILL MODERATE SOMEWHAT...BUT REMAIN COOLER THAN NORMAL ALONG WITH A SLIGHT CHANCE OF AFTERNOON OR EVENING SHOWERS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. D-L/RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:23 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 5 more | 24 hr |
Nearby
Winter Storm Warnings in Colorado, 2008Every winter storm warning in 2008
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.