Alert archive / Colorado / Tornado Warnings in 2011
Tornado Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 17, 2011, 5:20 PM MDT for Morgan County, Colorado. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 17, 2011, 5:20 PM MDT (23:20 UTC)
- Expired
- May 17, 2011, 5:44 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
County Morgan County, CO
The radar
The Denver radar (KFTG), 91 km from the middle of the area, began a volume at 23:23 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, 11.3 hours before the alert went out and 48 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
- 1149 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
574 WFUS55 KBOU 172320 TORBOU COC087-172345- /O.NEW.KBOU.TO.W.0001.110517T2320Z-110517T2345Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 520 PM MDT TUE MAY 17 2011 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL MORGAN COUNTY IN NORTHEAST COLORADO * UNTIL 545 PM MDT * AT 520 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER SOUTHEASTERN MORGAN COUNTY...OR 13 MILES SOUTHEAST OF FORT MORGAN. THIS STORM WAS MOVING NORTH AT 20 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN IN A LOW LYING AREA. && LAT...LON 4025 10362 4023 10353 4010 10360 4012 10368 TIME...MOT...LOC 2320Z 199DEG 16KT 4012 10364 $$
2 follow-up statements
862 WWUS55 KBOU 172324 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 524 PM MDT TUE MAY 17 2011 COC087-172345- /O.CON.KBOU.TO.W.0001.000000T0000Z-110517T2345Z/ MORGAN CO- 524 PM MDT TUE MAY 17 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR EAST CENTRAL MORGAN COUNTY... AT 524 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. THIS STORM WAS LOCATED OVER SOUTHEASTERN MORGAN COUNTY...OR 12 MILES SOUTHEAST OF FORT MORGAN. THIS STORM WAS MOVING NORTH AT 20 MPH. THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN IN A LOW LYING AREA. && LAT...LON 4025 10362 4023 10353 4010 10360 4012 10368 TIME...MOT...LOC 2324Z 199DEG 16KT 4014 10363 $$
779 WWUS55 KBOU 172344 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 544 PM MDT TUE MAY 17 2011 COC087-172354- /O.CAN.KBOU.TO.W.0001.000000T0000Z-110517T2345Z/ MORGAN CO- 544 PM MDT TUE MAY 17 2011 ...THE TORNADO WARNING FOR EAST CENTRAL MORGAN COUNTY IS CANCELLED... THE STORM AND THE CIRCULATION WITH IN THE STORM HAS WEAKENED... THEREFORE THE TORNADO WARNING HAS BEEN CANCELED. LAT...LON 4025 10362 4023 10353 4010 10360 4012 10368 TIME...MOT...LOC 2344Z 199DEG 16KT 4022 10359 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 4:20 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan | 40 min |
| May 17, 5:57 PM MDT | Tornado Warning | BOU | Washington | 33 min |
Nearby
Tornado Warnings in Colorado, 2011Every tornado warning in 2011Tornadoes 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.