Alert archive / Colorado / High Wind Warnings in 2011
High Wind Warning 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Apr 21, 2011, 3:54 PM MDT for 5 counties in Colorado. It took effect at Apr 22, 2011, 2:00 AM MDT. It was in force for 14 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 21, 2011, 3:54 PM MDT (21:54 UTC)
- In effect from
- Apr 22, 2011, 2:00 AM MDT
- Expired
- Apr 22, 2011, 3:42 PM MDT
- In force
- 14 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Larimer County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 119 km from the middle of the area, began a volume at 21:56 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
Denver, CO (KDNR), launched 12:00Z, 9.9 hours before the alert went out and 94 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
- 620 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
636 WWUS75 KBOU 212154 NPWBOU URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 354 PM MDT THU APR 21 2011 ...STRONG WINDS EXPECTED TO DEVELOP OVER NORTHERN COLORADO FRIDAY... .A STRONG HIGH PRESSURE RIDGE BUILDING OVER WYOMING TOMORROW WILL COMBINE WITH A DEPARTING LOW PRESSURE SYSTEM OVER THE CENTRAL PLAINS TO PRODUCE A PERIOD OF HIGH WINDS ACROSS NORTHERN COLORADO ON FRIDAY. WINDS ALOFT OVER THE COLORADO WILL BE STRONG AND WESTERLY ON FRIDAY. STRONG PRESSURE DIFFERENCES THAT DEVELOP ACROSS COLORADO WILL CAUSE GUSTY WINDS TO DEVELOP LATE TONIGHT AND CONTINUE THROUGH FRIDAY AFTERNOON. COZ038-042-048-050-051-220600- /O.NEW.KBOU.HW.W.0005.110422T0800Z-110423T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-LOGAN COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... CROOK...MERINO...STERLING...PEETZ...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 354 PM MDT THU APR 21 2011 ...HIGH WIND WARNING IN EFFECT FROM 2 AM TO 6 PM MDT FRIDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT FROM 2 AM TO 6 PM MDT FRIDAY. * TIMING...A WEATHER DISTURBANCE MOVING OVER COLORADO TONIGHT WILL PRODUCE SHOWERS AND POSSIBLY SOME THUNDERSTORMS DURING THE EVENING AND OVERNIGHT. AS THIS WEATHER DISTURBANCE MOVES OUT OF THE STATE EARLY FRIDAY MORNING...STRONG HIGH PRESSURE WILL BEGIN BUILDING OVER WYOMING AND WESTERN COLORADO. DURING THE PRE-DAWN HOURS WESTERLY WINDS ARE EXPECTED TO BEGIN INCREASING. STRONG WINDS WILL THEN CONTINUE THROUGH FRIDAY AFTERNOON. * WINDS...WEST WINDS WILL INCREASE TO 25 TO 35 MPH AFTER 2 AM WITH GUSTS UP TO 45 MPH. WINDS WILL CONTINUE AT 35 TO 45 MPH WITH GUSTS TO 60 MPH THROUGH FRIDAY. * IMPACTS...MOTORISTS OF LIGHT WEIGHT AND HIGH PROFILE VEHICLES ON I-25 AND I-76 SHOULD BE ALERT FOR DANGEROUS CROSSWINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A HIGH WIND WARNING MEANS THAT STRONG AND POTENTIALLY DAMAGING WINDS ARE EITHER OCCURRING OR HIGHLY LIKELY. && $$ DANKERS
4 follow-up statements
792 WWUS75 KBOU 220413 NPWBOU URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1013 PM MDT THU APR 21 2011 ...STRONG WINDS EXPECTED TO DEVELOP OVER NORTHERN COLORADO FRIDAY... .A STRONG HIGH PRESSURE RIDGE BUILDING OVER WYOMING LATE TONIGHT AND TOMORROW WILL COMBINE WITH A DEPARTING LOW PRESSURE SYSTEM OVER THE CENTRAL PLAINS TO PRODUCE A PERIOD OF HIGH WINDS ACROSS NORTHERN COLORADO ON FRIDAY. WINDS ALOFT OVER THE COLORADO WILL BE STRONG AND WESTERLY ON FRIDAY. STRONG PRESSURE DIFFERENCES THAT DEVELOP ACROSS COLORADO WILL CAUSE GUSTY WINDS TO DEVELOP LATE TONIGHT AND CONTINUE THROUGH FRIDAY AFTERNOON. COZ038-042-048-050-051-221100- /O.CON.KBOU.HW.W.0005.110422T0800Z-110423T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-LOGAN COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... CROOK...MERINO...STERLING...PEETZ...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 1013 PM MDT THU APR 21 2011 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 2 AM TO 6 PM MDT FRIDAY... A HIGH WIND WARNING REMAINS IN EFFECT FROM 2 AM TO 6 PM MDT FRIDAY. * TIMING...A WEATHER DISTURBANCE MOVING OVER COLORADO THIS EVENING WILL PRODUCE SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS DURING THE EVENING. AS THIS WEATHER DISTURBANCE MOVES OUT OF THE STATE LATER TONIGHT...STRONG HIGH PRESSURE WILL BEGIN BUILDING OVER WYOMING AND WESTERN COLORADO. DURING THE PRE-DAWN HOURS WESTERLY WINDS ARE EXPECTED TO BEGIN INCREASING. STRONG WINDS WILL THEN CONTINUE THROUGH FRIDAY AFTERNOON. * WINDS...WEST WINDS WILL INCREASE TO 20 TO 35 MPH AFTER 2 AM WITH GUSTS UP TO 50 MPH. WINDS WILL CONTINUE AT 25 TO 40 MPH WITH GUSTS TO 60 MPH THROUGH FRIDAY. * IMPACTS...MOTORISTS OF LIGHT WEIGHT AND HIGH PROFILE VEHICLES ON I-25 AND I-76 SHOULD BE ALERT FOR DANGEROUS CROSSWINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A HIGH WIND WARNING MEANS THAT STRONG AND POTENTIALLY DAMAGING WINDS ARE EITHER OCCURRING OR HIGHLY LIKELY. && $$
457 WWUS75 KBOU 221028 NPWBOU URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 428 AM MDT FRI APR 22 2011 ...STRONG WINDS EXPECTED TO DEVELOP OVER NORTHERN COLORADO THIS MORNING... .A STRONG HIGH PRESSURE RIDGE BUILDING OVER WYOMING THIS MORNING WILL COMBINE WITH A DEPARTING LOW PRESSURE SYSTEM OVER THE CENTRAL PLAINS TO PRODUCE A PERIOD OF HIGH WINDS ACROSS NORTHERN COLORADO TODAY. COZ038-042-048-050-051-221830- /O.CON.KBOU.HW.W.0005.000000T0000Z-110423T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-LOGAN COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... CROOK...MERINO...STERLING...PEETZ...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 428 AM MDT FRI APR 22 2011 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. * TIMING...STRONG NORTHWEST WINDS WILL INCREASE THIS MORNING WITH THE STRONGEST WINDS EXPECTED DURING THE AFTERNOON HOURS. THE WINDS WILL RAPIDLY DECREASE THIS EVENING. * WINDS...NORTHWEST WINDS WILL INCREASE TO 20 TO 30 MPH AFTER 9 AM WITH GUSTS UP TO 50 MPH. WIND SPEEDS BY AFTERNOON WILL BE 25 TO 40 MPH WITH GUSTS UP TO 60 MPH. * IMPACTS...MOTORISTS OF LIGHT WEIGHT AND HIGH PROFILE VEHICLES ON I-25 AND I-76 SHOULD BE ALERT FOR DANGEROUS CROSSWINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A HIGH WIND WARNING MEANS THAT STRONG AND POTENTIALLY DAMAGING WINDS ARE EITHER OCCURRING OR HIGHLY LIKELY. && $$ SWE
582 WWUS75 KBOU 221816 NPWBOU URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1216 PM MDT FRI APR 22 2011 ...STRONG WINDS EXPECTED TO CONTINUE OVER NORTHERN COLORADO THIS AFTERNOON... .STRONG HIGH PRESSURE BUILDING OVER WYOMING AND NORTHWESTERN COLORADO TODAY HAS GENERATED HIGH WINDS ACROSS NORTHERN COLORADO TODAY. COZ038-042-048-050-051-230000- /O.CON.KBOU.HW.W.0005.000000T0000Z-110423T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-LOGAN COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... CROOK...MERINO...STERLING...PEETZ...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 1216 PM MDT FRI APR 22 2011 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. * TIMING...STRONG NORTHWEST WINDS WILL CONTINUE THROUGH THE AFTERNOON HOURS. THE WINDS WILL RAPIDLY DECREASE THIS EVENING. * WINDS...NORTHWEST WINDS WILL BE 25 TO 35 MPH WITH GUSTS OF 50 TO 60 MPH. * IMPACTS...MOTORISTS OF LIGHTWEIGHT AND HIGH PROFILE VEHICLES ON I-25 AND I-76 SHOULD BE ALERT FOR DANGEROUS CROSSWINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A HIGH WIND WARNING MEANS THAT STRONG AND POTENTIALLY DAMAGING WINDS ARE EITHER OCCURRING OR HIGHLY LIKELY. && $$
302 WWUS75 KBOU 222142 NPWBOU URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 342 PM MDT FRI APR 22 2011 ...GUSTY WINDS WILL BE DECREASING DURING THE EVENING... .NORTHWEST WINDS OF 30 TO 40 MPH WITH SOME HIGHER GUSTS HAVE BEEN OCCURRING OVER THE NORTHERN PARTS OF THE NORTHEAST COLORADO PLAINS FOR MOST OF THE DAY. DURING THE EVENING...THE GUSTY WINDS ARE EXPECTED TO BEGIN DECREASING. SURFACE PRESSURE GRADIENTS ACROSS NORTHEAST COLORADO HAVE BEGUN TO DECREASE AND THE THREAT OF DAMAGING WINDS HAS COME TO AN END. COZ038-042-048-050-051-222245- /O.CAN.KBOU.HW.W.0005.000000T0000Z-110423T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-LOGAN COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... CROOK...MERINO...STERLING...PEETZ...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 342 PM MDT FRI APR 22 2011 ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE HIGH WIND WARNING. NORTHWEST WINDS EARLY IN THE EVENING WILL CONTINUE AT 30 TO 40 MPH WITH SOME HIGHER GUSTS. WINDS WILL CONTINUE DIMINISHING THROUGH THE EVENING HOURS...AND LATER TONIGHT WINDS WILL SWITCH TO NORTHERLY AT 10 TO 15 MPH. $$
Nearby
High Wind Warnings in Colorado, 2011Every high wind 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.