Alert archive / Colorado / Tornado Warnings in 2012

Tornado Warning 11, NWS Denver/Boulder, CO

June 6, 2012Denver County, Jefferson County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 6, 2012, 11:50 PM MDT for Denver County, Jefferson County, Colorado. It was in force for 25 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
Jun 6, 2012, 11:50 PM MDT (05:50 UTC)
Expired
Jun 7, 2012, 12:15 AM MDT
In force
25 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon

Counties Denver County, CO, Jefferson County, CO

The radar

The Denver radar (KFTG), 49 km from the middle of the area, began a volume at 05:52 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 7, 12:00 AM MDTHAIL 1.5Lakewood, COPING PONG SIZED HAIL KIPLING AND HAMDEN

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, 5.8 hours before the alert went out and 161 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 2012-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 859 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2012-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.1939Sfc1 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
859 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
2447 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

026 
WFUS55 KBOU 070550
TORBOU
COC031-059-070615-
/O.NEW.KBOU.TO.W.0011.120607T0550Z-120607T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
1150 PM MDT WED JUN 6 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL JEFFERSON COUNTY IN NORTHEAST COLORADO
  SOUTHWESTERN DENVER COUNTY IN NORTHEAST COLORADO

* UNTIL 1215 AM MDT

* AT 1151 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES SOUTH OF
  LAKEWOOD...OR 11 MILES SOUTHWEST OF DENVER. THIS STORM WAS MOVING
  NORTHEAST AT 10 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAKEWOOD
  AND SOUTHWESTERN DENVER.

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 LARGE
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3970 10519 3973 10505 3966 10503 3963 10503
      3963 10505 3960 10505 3957 10516
TIME...MOT...LOC 0551Z 220DEG 19KT 3964 10510

$$
3 follow-up statements
831 
WWUS55 KBOU 070558
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1158 PM MDT WED JUN 6 2012

COC031-059-070615-
/O.CON.KBOU.TO.W.0011.000000T0000Z-120607T0615Z/
JEFFERSON CO-DENVER CO-
1158 PM MDT WED JUN 6 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM MDT FOR
SOUTHWESTERN DENVER AND EAST CENTRAL JEFFERSON COUNTIES...

AT 1158 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED OVER SOUTHERN LAKEWOOD...OR 10 MILES SOUTHWEST OF DENVER.
THIS STORM WAS MOVING NORTHEAST AT 10 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LAKEWOOD AND SOUTHWESTERN DENVER.

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 LARGE
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3970 10519 3973 10505 3966 10503 3963 10503
      3963 10505 3960 10505 3957 10516
TIME...MOT...LOC 0558Z 220DEG 19KT 3966 10511

$$
580 
WWUS55 KBOU 070609
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1209 AM MDT THU JUN 7 2012

COC031-059-070615-
/O.CON.KBOU.TO.W.0011.000000T0000Z-120607T0615Z/
JEFFERSON CO-DENVER CO-
1209 AM MDT THU JUN 7 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM MDT FOR
SOUTHWESTERN DENVER AND EAST CENTRAL JEFFERSON COUNTIES...

AT 1209 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED OVER EXTREME SOUTHEASTERN LAKEWOOD...OR 9 MILES SOUTHWEST OF 
DENVER. THIS STORM WAS MOVING NORTHEAST AT 10 MPH.  A FUNNEL CLOUD 
HAS BEEN REPORTED NEAR LAKEWOOD.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LAKEWOOD AND SOUTHWESTERN DENVER.

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 LARGE
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3970 10519 3973 10505 3966 10503 3963 10503
      3963 10505 3960 10505 3957 10516
TIME...MOT...LOC 0609Z 220DEG 19KT 3964 10506

$$
844 
WWUS55 KBOU 070618
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1218 AM MDT THU JUN 7 2012

COC031-059-070628-
/O.EXP.KBOU.TO.W.0011.000000T0000Z-120607T0615Z/
JEFFERSON CO-DENVER CO-
1218 AM MDT THU JUN 7 2012

...THE TORNADO WARNING FOR SOUTHWESTERN DENVER AND EAST CENTRAL
JEFFERSON COUNTIES HAS EXPIRED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED SOMEWHAT BUT 
MAY STILL PRODUCE WINDS TO 60 MPH AND LARGE HAIL.

LAT...LON 3970 10519 3973 10505 3966 10503 3963 10503
      3963 10505 3960 10505 3957 10516
TIME...MOT...LOC 0609Z 220DEG 19KT 3964 10506

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 6:12 PM MDTSevere Thunderstorm WarningBOUWeld48 min
Jun 6, 6:21 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Douglas, Elbert54 min
Jun 6, 6:30 PM MDTAreal Flood AdvisoryBOUArapahoe, Elbert90 min
Jun 6, 6:35 PM MDTTornado WarningBOUAdams, Arapahoe, Douglas, Elbert40 min
Jun 6, 7:07 PM MDTTornado WarningBOUDouglas, Elbert38 min
Jun 6, 7:16 PM MDTFlash Flood WarningBOUArapahoe, Douglas, Elbert3 hr
Jun 6, 7:16 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas, Elbert44 min
Jun 6, 7:25 PM MDTSevere Thunderstorm WarningBOUAdams, Weld35 min
Jun 6, 7:42 PM MDTTornado WarningBOUDouglas, Elbert33 min
Jun 6, 7:43 PM MDTSevere Thunderstorm WarningBOUWeld47 min
Jun 6, 7:44 PM MDTTornado WarningBOUArapahoe31 min
Jun 6, 7:56 PM MDTSevere Thunderstorm WarningBOUDouglas49 min
Jun 6, 8:05 PM MDTTornado WarningBOUDouglas25 min
Jun 6, 8:13 PM MDTAreal Flood AdvisoryBOUDouglas92 min
Jun 6, 8:30 PM MDTTornado WarningBOUDouglas, Elbert30 min
Jun 6, 8:37 PM MDTFlash Flood WarningBOUDouglas3 hr
Jun 6, 8:38 PM MDTSevere Thunderstorm WarningBOUAdams, Denver52 min
Jun 6, 9:00 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas, Elbert45 min
Jun 6, 9:39 PM MDTSevere Thunderstorm WarningBOUDouglas51 min
Jun 6, 9:53 PM MDTFlash Flood WarningBOULarimer82 min
Jun 6, 10:25 PM MDTFlash Flood WarningBOUArapahoe, Douglas, Elbert3 hr
Jun 6, 10:28 PM MDTSevere Thunderstorm WarningBOUDouglas32 min
Jun 6, 11:02 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas43 min
Jun 6, 11:30 PM MDTFlash Flood WarningBOUDouglas3 hr
Jun 6, 11:34 PM MDTSevere Thunderstorm WarningBOUDenver, Jefferson41 min
Jun 7, 12:16 AM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Douglas, Jefferson44 min
Jun 7, 12:30 AM MDTAreal Flood AdvisoryBOUArapahoe, Denver, Jefferson90 min
Jun 7, 12:52 AM MDTFlash Flood WarningBOUArapahoe, Denver, Jefferson3 hr
Jun 7, 12:56 AM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Douglas33 min
Jun 7, 1:39 AM MDTAreal Flood WarningBOUAdams, Arapahoe, Denver, Douglas, Elbert, Jefferson7 hr
Jun 7, 8:43 AM MDTAreal Flood AdvisoryBOUAdams, Arapahoe, Denver4 hr
Jun 7, 10:47 AM MDTFlash Flood WatchBOUAdams, Arapahoe, Broomfield, Denver, Douglas, Elbert13 hr
Jun 7, 4:22 PM MDTSevere Thunderstorm WarningBOUAdams, Morgan, Weld53 min
Jun 7, 4:25 PM MDTFire Weather WatchBOUBoulder, Clear Creek, Gilpin, Grand, Jackson, Larimer and 2 more23 hr
Jun 7, 4:51 PM MDTSevere Thunderstorm WarningBOUArapahoe39 min
Jun 7, 5:06 PM MDTTornado WarningBOUArapahoe24 min
Jun 7, 5:09 PM MDTSevere Thunderstorm WarningBOUMorgan51 min
Jun 7, 5:28 PM MDTTornado WarningBOUArapahoe, Elbert32 min
Jun 7, 5:49 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington, Weld41 min
Jun 7, 5:54 PM MDTTornado WarningBOUElbert36 min
Jun 7, 5:59 PM MDTSevere Thunderstorm WarningBOUArapahoe31 min

Nearby

Tornado Warnings in Colorado, 2012Every tornado warning in 2012Tornadoes in 2012

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.