Alert archive / Colorado / Tornado Warnings in 2015

Tornado Warning 40, NWS Denver/Boulder, CO

June 6, 2015Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 6, 2015, 3:59 PM MDT for Lincoln County, Washington County, Colorado. It was in force for 31 min. 2 reports 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
Jun 6, 2015, 3:59 PM MDT (21:59 UTC)
Expired
Jun 6, 2015, 4:30 PM MDT
In force
31 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

Counties Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 114 km from the middle of the area, began a volume at 22:03 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
Jun 6, 4:35 PM MDTTORNADO3 S Thurman, COUPDATED ON 06/08/15 WITH DAMAGE REPORT. ELECTRICAL LINES/POLES DOWN NORTHEAST OF SHAW. EVIDENCE OF WATER FLOWING OVER A BRIDGE IN THE AREA SUGGESTING WATER DEPTH ABOUT 15 FEET.
Jun 6, 4:35 PM MDTTORNADO3 S Thurman, COTORNADO IN OPEN FIELD WITH NO REPORTED DAMAGE.

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 12:00Z, 10.0 hours before the alert went out and 35 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 12:00Z on 2015-06-06Temperature 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 12:00Z on 2015-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.19395878Sfc1 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
1624 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
48 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.

966 
WFUS55 KBOU 062159
TORBOU
COC073-121-062230-
/O.NEW.KBOU.TO.W.0040.150606T2159Z-150606T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
359 PM MDT SAT JUN 6 2015

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN LINCOLN COUNTY IN EAST CENTRAL COLORADO...
  SOUTH CENTRAL WASHINGTON COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 430 PM MDT
    
* AT 358 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 13 MILES SOUTH OF LINDON...OR 21 MILES
  NORTHEAST OF LIMON...MOVING EAST AT 35 MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* LOCATIONS IMPACTED INCLUDE...
  THURMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3957 10316 3940 10316 3946 10364 3964 10362
      3969 10299 3957 10299
TIME...MOT...LOC 2158Z 272DEG 30KT 3954 10349 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DANKERS
1 follow-up statement
426 
WWUS55 KBOU 062210
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
410 PM MDT SAT JUN 6 2015

COC073-121-062230-
/O.CON.KBOU.TO.W.0040.000000T0000Z-150606T2230Z/
LINCOLN CO-WASHINGTON CO-
410 PM MDT SAT JUN 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR
NORTHEASTERN LINCOLN AND SOUTH CENTRAL WASHINGTON COUNTIES...
    
AT 407 PM MDT...A CONFIRMED TORNADO WAS LOCATED 9 MILES SOUTHWEST OF
THURMAN...OR 23 MILES NORTHWEST OF FLAGLER...MOVING EAST AT 35 MPH.

HAZARD...DAMAGING TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...AN UNTRAINED SPOTTER WEST OF COPE REPORTED A BRIEF TORNADO 
OVER SOUTHERN WASHINGTON COUNTY AT 405 PM MDT. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT     
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE  
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

LOCATIONS IMPACTED INCLUDE...
THURMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW! MOVE TO A
BASEMENT OR 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 3957 10316 3940 10316 3946 10364 3964 10362
      3969 10299 3957 10299
TIME...MOT...LOC 2207Z 272DEG 30KT 3954 10338 

TORNADO...OBSERVED
HAIL...1.25IN

$$

DANKERS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 8:50 PM MDTSpecial Weather StatementBOUDenver, Douglas25 min
Jun 5, 9:11 PM MDTAreal Flood AdvisoryBOUAdams, Arapahoe, Denver, Douglas, Jefferson94 min
Jun 5, 9:20 PM MDTSpecial Weather StatementBOUDenver25 min
Jun 6, 10:14 AM MDTRiver Flood AdvisoryBOUAdams30 hr
Jun 6, 2:20 PM MDTSpecial Weather StatementBOUDenver40 min
Jun 6, 3:48 PM MDTSpecial Weather StatementBOUWashington42 min
Jun 6, 4:04 PM MDTTornado WarningBOUMorgan26 min
Jun 6, 4:29 PM MDTTornado WarningBOUWashington31 min
Jun 6, 5:29 PM MDTSpecial Weather StatementBOULincoln46 min

Nearby

Tornado Warnings in Colorado, 2015Every tornado warning in 2015Tornadoes 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.