Alert archive / Colorado / Tornado Warnings in 2005

Tornado Warning 23, NWS Denver/Boulder, CO

June 12, 2005Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 12, 2005, 11:29 AM MDT for Weld County, Colorado. It was in force for 31 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
Jun 12, 2005, 11:29 AM MDT (17:29 UTC)
Expired
Jun 12, 2005, 12:00 PM MDT
In force
31 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Weld County, CO

The radar

The Denver radar (KFTG), 38 km from the middle of the area, began a volume at 17:30 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, 5.5 hours before the alert went out and 116 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 2005-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 joules per kilogram.LCLLFCEL10008507005003002001001 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 2005-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897117Sfc1 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
160 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
28 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.

000 
WFUS55 KBOU 121729
TORBOU
COC123-121800-
/O.NEW.KBOU.TO.W.0023.050612T1729Z-050612T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
1129 AM MDT SUN JUN 12 2005

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL WELD COUNTY IN NORTHEAST COLORADO

* UNTIL NOON MDT

* AT 1125 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES WEST OF
  KEENESBURG...OR ABOUT 24 MILES SOUTHEAST OF GREELEY. THIS STORM WAS
  MOVING NORTHEAST AT 10 MPH.

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

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4015 10459 4003 10462 4009 10442 4021 10451

$$

GIMMESTAD
2 follow-up statements
000 
WWUS55 KBOU 121746
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1145 AM MDT SUN JUN 12 2005

COC123-121800-
/O.CON.KBOU.TO.W.0023.000000T0000Z-050612T1800Z/
WELD CO-
1145 AM MDT SUN JUN 12 2005

...A TORNADO WARNING CONTINUES UNTIL NOON MDT FOR SOUTH CENTRAL WELD
COUNTY...

AT 1140 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM 
WAS LOCATED OVER KEENESBURG...OR ABOUT 24 MILES SOUTHEAST OF 
GREELEY. THIS STORM WAS MOVING EAST AT 5 MPH.

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

FUNNEL CLOUDS HAVE BEEN REPORTED NEAR KEENESBURG IN THE LAST 10 
MINUTES. RADAR INDICATES ADDITIONAL AREAS OF ROTATION SOUTH OF 
KEENESBURG. TORNADOES MAY BE EMBEDDED IN RAIN IN THIS DEVELOPING 
THUNDERSTORM.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO SAFE
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER
YOUR HEAD.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.

LAT...LON 4015 10459 4003 10462 4009 10442 4021 10451

$$

GIMMESTAD
000 
WWUS55 KBOU 121758
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1158 AM MDT SUN JUN 12 2005

COC123-121808-
/O.EXP.KBOU.TO.W.0023.000000T0000Z-050612T1800Z/
WELD CO-
1158 AM MDT SUN JUN 12 2005

...THE TORNADO WARNING FOR SOUTH CENTRAL WELD COUNTY EXPIRED AT NOON
MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING NO LONGER POSES A TORNADO 
THREAT.

LAT...LON 4015 10459 4003 10462 4009 10442 4021 10451

$$

GIMMESTAD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 12:21 PM MDTSevere Thunderstorm WarningBOUArapahoe24 min
Jun 12, 1:47 PM MDTSevere Thunderstorm WarningBOULogan37 min

Nearby

Tornado Warnings in Colorado, 2005Every tornado warning in 2005Tornadoes in 2005

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.