Alert archive / Colorado / High Wind Warnings in 2015

High Wind Warning 3, NWS Denver/Boulder, CO

November 18, 201510 counties in Colorado

NWS Denver/Boulder, CO issued this high wind warning at Nov 18, 2015, 3:29 AM MST for 10 counties in Colorado. It was in force for 9 hr. 12 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
Nov 18, 2015, 3:29 AM MST (10:29 UTC)
Expired
Nov 18, 2015, 12:00 PM MST
In force
9 hr
Issued by
NWS Denver/Boulder, CO

Counties Boulder County, CO, Clear Creek County, CO, Douglas 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), 94 km from the middle of the area, began a volume at 10:30 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

TimeReportWhereRemark
Nov 18, 5:18 AM MSTNON-TSTM WND GST 783 Ene Nederland, CO
Nov 18, 5:56 AM MSTNON-TSTM WND GST 784 Ene Nederland, COSUSTAINED 50 MPH.
Nov 18, 6:01 AM MSTNON-TSTM WND GST 1002 S Gold Hill, COSUSTAINED 59 MPH.
Nov 18, 6:30 AM MSTNON-TSTM WND GST 842 Nw Rocky Flats, CONATIONAL WIND TECHNOLOGY CENTER
Nov 18, 7:00 AM MSTNON-TSTM WND GST 504 Sse Pinecliffe, COSUSTAINED WINDS OF 50 MPH WITH UNKNOWN HIGHER GUSTS. SEVERAL DEAD TREES BLOW OVER, WHITEOUT CONDITIONS AND POWER OUTAGES IN COAL CREEK CANYON.
Nov 18, 7:00 AM MSTNON-TSTM WND GST 703 S Evergreen, CO
Nov 18, 7:20 AM MSTNON-TSTM WND GST 982 Nw Rocky Flats, CONATIONAL WIND TECHNOLOGY CENTER
Nov 18, 7:25 AM MSTNON-TSTM WND GST 903 Ssw Boulder, CO
Nov 18, 7:25 AM MSTNON-TSTM WND GST 943 S Boulder, CONCAR MESA LAB
Nov 18, 7:33 AM MSTNON-TSTM WND GST 77Nw Fort Collins, COCHRISTMAN FIELD AT COLORADO STATE UNIVERSITY. REPORTS OF CAR WINDOWS SHATTERED NORTHWEST FORT COLLINS EARLIER THIS MORNING
Nov 18, 7:36 AM MSTNON-TSTM WND GST 1022 Nw Rocky Flats, CONATIONAL WIND TECHNOLOGY CENTER
Nov 18, 10:04 AM MSTNON-TSTM WND GST 703 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 (KDEN), launched 00:00Z, 10.5 hours before the alert went out and 206 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2015-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2015-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2588 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
290 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

899 
WWUS75 KBOU 181029
NPWBOU

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
329 AM MST WED NOV 18 2015

...HIGH WINDS WEST OF DENVER AND BOULDER THIS MORNING...

.THE JET STREAM INTERACTING WITH THE MOUNTAINS WILL CREATE HIGH
WINDS ALONG THE EAST SLOPES OF THE FRONT RANGE THIS MORNING. THE
WINDS WILL BE STRONGEST IN THE NORMALLY WIND PRONE AREAS JUST WEST
OF GOLDEN AND BOULDER...ALTHOUGH THERE WILL BE STRONG WINDS IN
OTHER EXPOSED FOOTHILL LOCATIONS ESPECIALLY ABOVE 8000 FEET. WIND
GUSTS TO 80 MPH CAN BE EXPECTED THIS MORNING. THE WINDS WILL CAUSE
EXTENSIVE BLOWING SNOW IN THE MOUNTAINS AND FOOTHILLS...AND NEAR
BLIZZARD CONDITIONS CAN BE EXPECTED ABOVE TIMBERLINE. 

COZ033>036-181900-
/O.NEW.KBOU.HW.W.0003.151118T1029Z-151118T1900Z/
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-
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...ESTES PARK...GLENDEVEY...
NEDERLAND...RED FEATHER LAKES...BAILEY...CENTRAL CITY...
EVERGREEN...GEORGETOWN...IDAHO SPRINGS...WESTCREEK
329 AM MST WED NOV 18 2015

...HIGH WIND WARNING IN EFFECT UNTIL NOON MST TODAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT UNTIL NOON MST TODAY. 

* TIMING...HIGH WINDS WILL CONTINUE THIS MORNING...DECREASING THIS
  AFTERNOON.

* WINDS...WEST WINDS AT 30 TO 50 MPH WITH GUSTS TO 80 MPH IN WIND
  PRONE LOCATIONS.

* IMPACTS...AREAS OF BLOWING AND DRIFTING SNOW WITH NEAR BLIZZARD
  CONDITIONS IN HIGHER OPEN AREAS. DAMAGE TO TREES...POWER
  LINES...AND SHINGLES POSSIBLE. DANGEROUS CROSSWINDS ON NORTH TO
  SOUTH HIGHWAYS INCLUDING THE PEAK TO PEAK HIGHWAY AND HIGHWAY 93
  AROUND ROCKY FLATS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A HIGH WIND WARNING MEANS THAT STRONG AND POTENTIALLY
DAMAGING WINDS ARE EITHER OCCURRING OR HIGHLY LIKELY. RESIDENTS
SHOULD MOVE TRASH CANS...PATIO FURNITURE...AND ANY OTHER ITEMS
EASILY TOSSED ABOUT BY HIGH WINDS INDOORS. MOTORISTS TRAVELING IN
HIGH PROFILE VEHICLES SHOULD CONSIDER DELAYING TRAVEL UNTIL THE
WINDS SUBSIDE.

&&

$$

GIMMESTAD
1 follow-up statement
897 
WWUS75 KBOU 181900
NPWBOU

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1200 PM MST WED NOV 18 2015

...SOME WINDS WILL CONTINUE...BUT HIGH WIND WARNING IS EXPIRING AT
NOON...

.A VERY STRONG PRESSURE GRADIENT OVER COLORADO WILL SLOWLY RELAX
THIS AFTERNOON AND EVENING. GUSTY WINDS WILL CONTINUE...NOT QUITE
AS STRONG AS WE SAW THIS MORNING. 

COZ033>036-182000-
/O.EXP.KBOU.HW.W.0003.000000T0000Z-151118T1900Z/
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-
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...ESTES PARK...GLENDEVEY...
NEDERLAND...RED FEATHER LAKES...BAILEY...CENTRAL CITY...
EVERGREEN...GEORGETOWN...IDAHO SPRINGS...WESTCREEK
1200 PM MST WED NOV 18 2015

...HIGH WIND WARNING WILL EXPIRE AT NOON MST TODAY...

|THIS AFTERNOON AND EVENING THERE WILL BE SOME WIND GUSTS IN THE
EXPOSED AREAS AS HIGH AS 70 MPH. WITH FALLING SNOW IN THE
MOUNTAINS THERE WILL BE AREAS OF LOWER VISIBILITIES IN SNOW AND
BLOWING SNOW. DRIVE WITH CARE IN THE HIGH COUNTRY|.

$$

Nearby

High Wind Warnings in Colorado, 2015Every high wind warning in 2015

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.