Alert archive / Colorado / Tornado Warnings in 2007

Tornado Warning 4, NWS Denver/Boulder, CO

April 23, 2007Morgan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Apr 23, 2007, 5:06 PM MDT for Morgan County, Colorado. It was in force for 39 min. 2 reports 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: Apr 23, 2007, 5:06 PM MDT (23:06 UTC)
Expired: Apr 23, 2007, 5:45 PM MDT
In force: 39 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

County Morgan County, CO

The radar

The Denver radar (KFTG), 100 km from the middle of the area, began a volume at 23:08 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
Apr 23, 5:28 PM MDT	HAIL 1	9 S New Raymer, CO
Apr 23, 5:55 PM MDT	HAIL 0.75	12 Nne Fort Morgan, 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
Apr 23, 2:10 PM MDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.1 hours before the alert went out and 75 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1110 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 121 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 232306
TORBOU
COC087-232345-
/O.NEW.KBOU.TO.W.0004.070423T2306Z-070423T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
506 PM MDT MON APR 23 2007

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MORGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 545 PM MDT

* AT 506 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES
  SOUTHWEST OF ANTELOPE SPRINGS...OR ABOUT 9 MILES NORTHWEST OF FORT
  MORGAN. THIS STORM WAS MOVING EAST AT 15 MPH.

IN ADDITION...THIS STORM WILL ALSO PRODUCE GOLF BALL SIZED HAIL AND 
WIND GUSTS IN EXCESS OF 60 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HILLROSE
  AND ANTELOPE SPRINGS.

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 4051 10388 4031 10392 4032 10347 4052 10347

$$
BARJENBRUCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 4:34 AM MDT	Winter Storm Watch	BOU	Arapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more	19 hr
Apr 23, 3:19 PM MDT	Winter Storm Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more	37 hr
Apr 23, 4:22 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	38 min
Apr 23, 4:59 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	61 min
Apr 23, 5:03 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Broomfield	42 min
Apr 23, 5:42 PM MDT	Tornado Warning	BOU	Morgan	48 min

Nearby

Tornado Warnings in Colorado, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.