Alert archive / Colorado / Tornado Warnings in 2011

Tornado Warning 9, NWS Denver/Boulder, CO

May 28, 2011Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 28, 2011, 8:54 PM MDT for Lincoln County, Colorado. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 28, 2011, 8:54 PM MDT (02:54 UTC)
Expired
May 28, 2011, 9:45 PM MDT
In force
51 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 76 km from the middle of the area, began a volume at 02:55 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

TimeReportWhereRemark
May 28, 8:57 PM MDTHAIL 15 Ne Punkin Center, 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 00:00Z, 2.9 hours before the alert went out and 112 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 2011-05-29Temperature 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 2011-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.1939587897Sfc1 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
1444 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
429 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.

360 
WFUS55 KBOU 290254
TORBOU
COC073-290345-
/O.NEW.KBOU.TO.W.0009.110529T0254Z-110529T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
854 PM MDT SAT MAY 28 2011

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO

* UNTIL 945 PM MDT

* AT 853 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 18 MILES WEST OF
  BOYERO...OR 28 MILES SOUTH OF LIMON. THIS STORM WAS MOVING EAST 
  AT 35 MPH. A TRAINED WEATHER SPOTTER ALSO REPORTED A POSSIBLE
  TORNADO WITH THIS STORM.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOYERO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3881 10370 3887 10369 3897 10363 3908 10316
      3879 10316
TIME...MOT...LOC 0253Z 277DEG 29KT 3887 10357

$$
BARJENBRUCH
2 follow-up statements
186 
WWUS55 KBOU 290311
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
911 PM MDT SAT MAY 28 2011

COC073-290345-
/O.CON.KBOU.TO.W.0009.000000T0000Z-110529T0345Z/
LINCOLN CO-
911 PM MDT SAT MAY 28 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR EAST
CENTRAL LINCOLN COUNTY...

AT 910 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED 11 MILES SOUTHWEST OF BOYERO...OR 30 MILES SOUTHEAST OF
LIMON. THIS STORM WAS MOVING EAST AT 30 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BOYERO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
1 INCH HAIL AND DAMAGING WINDS UP TO 60 MPH.

&&

LAT...LON 3880 10351 3886 10351 3900 10349 3908 10316
      3879 10316
TIME...MOT...LOC 0310Z 273DEG 27KT 3886 10341

$$
BARJENBRUCH
118 
WWUS55 KBOU 290337
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
937 PM MDT SAT MAY 28 2011

COC073-290346-
/O.EXP.KBOU.TO.W.0009.000000T0000Z-110529T0345Z/
LINCOLN CO-
937 PM MDT SAT MAY 28 2011

...THE TORNADO WARNING FOR EAST CENTRAL LINCOLN COUNTY WILL EXPIRE AT
945 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND WILL BE
MOVING OUT OF EXTREME EASTERN LINCOLN COUNTY BY 945 PM.

LAT...LON 3880 10351 3886 10351 3900 10349 3908 10316
      3879 10316
TIME...MOT...LOC 0336Z 273DEG 27KT 3885 10316

$$
BARJENBRUCH

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 8:04 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln41 min
May 28, 8:45 PM MDTSevere Thunderstorm WarningBOULincoln45 min
May 28, 10:23 PM MDTSpecial Weather StatementBOUElbert37 min
May 28, 11:41 PM MDTSpecial Weather StatementBOUElbert34 min
May 29, 3:35 PM MDTHigh Wind WatchBOUAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more14 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.