Alert archive / Colorado / Tornado Warnings in 2009

Tornado Warning 49, NWS Denver/Boulder, CO

June 23, 2009Elbert County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 23, 2009, 5:02 PM MDT for Elbert County, Colorado. It was in force for 20 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 23, 2009, 5:02 PM MDT (23:02 UTC)
Expired: Jun 23, 2009, 5:22 PM MDT
In force: 20 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Elbert County, CO

The radar

The Pueblo radar (KPUX), 84 km from the middle of the area, began a volume at 23:02 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
Jun 23, 2:51 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.0 hours before the alert went out and 96 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: 730 J/kg
Mixed-layer CIN: -272 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -58 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 232302
TORBOU
COC039-232345-
/O.NEW.KBOU.TO.W.0049.090623T2302Z-090623T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
502 PM MDT TUE JUN 23 2009

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL ELBERT COUNTY IN EAST CENTRAL COLORADO

* UNTIL 545 PM MDT

* AT 501 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 4 MILES 
  EAST OF MATHESON...OR 12 MILES SOUTHWEST OF LIMON. THIS STORM
  WAS MOVING NORTH AT 10 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3928 10404 3929 10372 3905 10372 3903 10404
TIME...MOT...LOC 2301Z 188DEG 11KT 3916 10401

$$

1 follow-up statement

000 
WWUS55 KBOU 232322
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
522 PM MDT TUE JUN 23 2009

COC039-232330-
/O.CAN.KBOU.TO.W.0049.000000T0000Z-090623T2345Z/
ELBERT CO-
522 PM MDT TUE JUN 23 2009

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

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND EXITED THE AREA.
SCATTERED THUNDERSTORMS OVER NORTHEAST ELBERT COUNTY WILL CONTINUE TO TRACK
TO THE NORTH.  IF THE STORM STRENGTHEN ADDITIONAL WARNINGS MAY BE ISSUED. 

LAT...LON 3928 10404 3929 10372 3905 10372 3903 10404
TIME...MOT...LOC 2320Z 187DEG 14KT 3927 10400

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 8:31 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Larimer	44 min
Jun 22, 8:51 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	54 min
Jun 22, 9:28 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Larimer	47 min
Jun 22, 9:34 PM MDT	Flash Flood Warning	BOU	Larimer, Weld	3 hr
Jun 22, 9:44 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	61 min
Jun 22, 9:54 PM MDT	Tornado Warning	BOU	Larimer, Weld	51 min
Jun 22, 10:24 PM MDT	Tornado Warning	BOU	Weld	36 min
Jun 22, 10:32 PM MDT	Severe Thunderstorm Warning	BOU	Weld	32 min
Jun 22, 10:35 PM MDT	Areal Flood Advisory	BOU	Larimer	85 min
Jun 22, 10:57 PM MDT	Severe Thunderstorm Warning	BOU	Weld	48 min
Jun 22, 11:57 PM MDT	Severe Thunderstorm Warning	BOU	Weld	16 min
Jun 23, 4:02 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Douglas, Elbert, Weld	58 min
Jun 23, 4:14 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver, Douglas, Elbert	91 min
Jun 23, 4:22 PM MDT	Severe Thunderstorm Warning	BOU	Weld	53 min
Jun 23, 4:37 PM MDT	Flash Flood Warning	BOU	Douglas	68 min
Jun 23, 4:59 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	50 min
Jun 23, 5:17 PM MDT	Severe Thunderstorm Warning	BOU	Weld	58 min

Nearby

Tornado Warnings in Colorado, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.