Alert archive / Colorado / Tornado Warnings in 2006

Tornado Warning 4, NWS Denver/Boulder, CO

May 31, 2006Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 31, 2006, 4:02 PM MDT for Weld County, Colorado. It was in force for 28 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 31, 2006, 4:02 PM MDT (22:02 UTC)
Expired: May 31, 2006, 4:30 PM MDT
In force: 28 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 92 km from the middle of the area, began a volume at 22:02 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 31, 1:35 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.0 hours before the alert went out and 105 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 28 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 102 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 312202
TORBOU
COC123-312230-
/O.NEW.KBOU.TO.W.0004.060531T2202Z-060531T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
402 PM MDT WED MAY 31 2006

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 430 PM MDT

* AT 359 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 6 MILES
  NORTHWEST OF BUCKINHAM...OR ABOUT 25 MILES NORTHWEST OF FORT MORGAN.
  THIS STORM WAS MOVING SOUTHEAST AT 40 MPH.

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

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 4073 10394 4064 10415 4052 10405 4053 10374

$$

BARJENBRUCH

1 follow-up statement

000 
WWUS55 KBOU 312233
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
433 PM MDT WED MAY 31 2006

COC123-312243-
/O.EXP.KBOU.TO.W.0004.000000T0000Z-060531T2230Z/
WELD CO-
433 PM MDT WED MAY 31 2006

...THE TORNADO WARNING FOR EAST CENTRAL WELD COUNTY EXPIRED AT 430 PM
MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED SLIGHTLY AND
WAS NO LONGER SHOWING STRONG ROTATION.

LAT...LON 4073 10394 4064 10415 4052 10405 4053 10374

$$

BARJENBRUCH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 8:12 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	48 min
May 31, 2:04 PM MDT	Tornado Warning	BOU	Arapahoe	26 min
May 31, 2:19 PM MDT	Severe Thunderstorm Warning	BOU	Weld	56 min
May 31, 2:44 PM MDT	Severe Thunderstorm Warning	BOU	Logan	31 min
May 31, 2:50 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	55 min
May 31, 3:16 PM MDT	Severe Thunderstorm Warning	BOU	Weld	59 min
May 31, 3:46 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	59 min
May 31, 4:36 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	24 min
May 31, 5:17 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	28 min

Nearby

Tornado Warnings in Colorado, 2006 Every tornado warning in 2006 Tornadoes in 2006

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.