Alert archive / Colorado / Tornado Warnings in 2007

Tornado Warning 38, NWS Denver/Boulder, CO

May 14, 2007Arapahoe County, Elbert County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 14, 2007, 8:25 PM MDT for Arapahoe County, Elbert County, Colorado. It was in force for 33 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 14, 2007, 8:25 PM MDT (02:25 UTC)
Expired: May 14, 2007, 8:58 PM MDT
In force: 33 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

Counties Arapahoe County, CO, Elbert County, CO

The radar

The Denver radar (KFTG), 30 km from the middle of the area, began a volume at 02:26 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 14, 2:57 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.4 hours before the alert went out and 110 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: 774 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1671 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 150226
TORBOU
COC005-039-150315-
/O.NEW.KBOU.TO.W.0038.070515T0225Z-070515T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
825 PM MDT MON MAY 14 2007

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL ELBERT COUNTY IN EAST CENTRAL COLORADO
  SOUTH CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO

* UNTIL 915 PM MDT

* AT 825 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME
  NORTHWESTERN ELBERT COUNTY...OR ABOUT 29 MILES SOUTHEAST OF DENVER.
  THIS STORM WAS MOVING SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
  WARNED COUNTIES.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

LAT...LON 3960 10455 3946 10452 3937 10429 3961 10428

$$
BAKER

1 follow-up statement

000 
WWUS55 KBOU 150258
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
858 PM MDT MON MAY 14 2007

COC005-039-150308-
/O.CAN.KBOU.TO.W.0038.000000T0000Z-070515T0315Z/
ELBERT CO-ARAPAHOE CO-
858 PM MDT MON MAY 14 2007

...THE TORNADO WARNING FOR SOUTH CENTRAL ARAPAHOE AND NORTH CENTRAL
ELBERT COUNTIES IS CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE TORNADO WARNING HAS EXITED THE 
AREA.

LAT...LON 3960 10455 3946 10452 3937 10429 3961 10428

$$
BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 6:11 PM MDT	Severe Thunderstorm Warning	BOU	Weld	64 min
May 14, 6:23 PM MDT	Tornado Warning	BOU	Weld	52 min
May 14, 6:57 PM MDT	Tornado Warning	BOU	Adams, Weld	48 min
May 14, 7:15 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Jefferson	60 min
May 14, 7:27 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	33 min
May 14, 7:46 PM MDT	Tornado Warning	BOU	Adams, Morgan	29 min
May 14, 7:55 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	47 min
May 14, 8:19 PM MDT	Tornado Warning	BOU	Adams, Washington	41 min
May 14, 8:52 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.