Alert archive / Colorado / Tornado Warnings in 2008

Tornado Warning 23, NWS Denver/Boulder, CO

June 4, 2008Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 4, 2008, 2:11 PM MDT for Washington County, Colorado. It was in force for 35 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 4, 2008, 2:11 PM MDT (20:11 UTC)
Expired: Jun 4, 2008, 2:46 PM MDT
In force: 35 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Washington County, CO

The radar

The Goodland radar (KGLD), 130 km from the middle of the area, began a volume at 20:12 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

Time	Report	Where	Remark
Jun 4, 2:29 PM MDT	TORNADO	8 S Hyde, CO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 4, 12:42 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.2 hours before the alert went out and 34 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: 266 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 042011
TORBOU
COC121-042100-
/O.NEW.KBOU.TO.W.0023.080604T2011Z-080604T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
211 PM MDT WED JUN 4 2008

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 300 PM MDT

* AT 211 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 13 MILES SOUTH
  OF OTIS...OR 20 MILES SOUTHEAST OF AKRON. THIS STORM WAS MOVING
  NORTHEAST AT 14 MPH.

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

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 SAFE SHELTER IS AVAILABLE...LIE FLAT IN
THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR
HANDS.

LAT...LON 4011 10302 4027 10280 4005 10281 3990 10281
      3992 10306
TIME...MOT...LOC 2011Z 203DEG 13KT 3997 10293

$$


RJK

2 follow-up statements

000 
WWUS55 KBOU 042030
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
230 PM MDT WED JUN 4 2008

COC121-042100-
/O.CON.KBOU.TO.W.0023.000000T0000Z-080604T2100Z/
WASHINGTON CO-
229 PM MDT WED JUN 4 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM MDT FOR EAST
CENTRAL WASHINGTON COUNTY...

AT 229 PM MDT...A COUNTY WORKER REPORTED A TORNADO 8 MILES SOUTH OF 
HYDE...OR 22 MILES SOUTHEAST OF AKRON.  THIS STORM WAS MOVING 
NORTHEAST AT 15 MPH.

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

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT WEDNESDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4011 10302 4027 10280 4005 10281 3990 10281
      3992 10306
TIME...MOT...LOC 2029Z 226DEG 15KT 4003 10283

$$

RJK

000 
WWUS55 KBOU 042046
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
246 PM MDT WED JUN 4 2008

COC121-042055-
/O.CAN.KBOU.TO.W.0023.000000T0000Z-080604T2100Z/
WASHINGTON CO-
245 PM MDT WED JUN 4 2008

...THE TORNADO WARNING FOR EAST CENTRAL WASHINGTON COUNTY IS
CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED WASHINGTON 
COUNTY TO THE EAST.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT WEDNESDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4011 10302 4027 10280 4005 10281 3990 10281
      3992 10306
TIME...MOT...LOC 2045Z 229DEG 15KT 4006 10279

$$

RJK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 2:38 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Weld	37 min
Jun 4, 2:48 PM MDT	Tornado Warning	BOU	Adams, Morgan, Weld	42 min
Jun 4, 2:58 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Boulder, Broomfield, Jefferson, Weld	47 min
Jun 4, 3:26 PM MDT	Tornado Warning	BOU	Adams, Morgan, Washington	35 min
Jun 4, 3:59 PM MDT	Tornado Warning	BOU	Morgan, Washington	46 min
Jun 4, 4:36 PM MDT	Tornado Warning	BOU	Washington	39 min
Jun 4, 5:11 PM MDT	Tornado Warning	BOU	Washington	34 min
Jun 4, 5:17 PM MDT	Flash Flood Warning	BOU	Morgan, Washington	2 hr
Jun 4, 5:46 PM MDT	Tornado Warning	BOU	Washington	29 min

Nearby

Tornado Warnings in Colorado, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.