Alert archive / Colorado / Tornado Warnings in 2001

Tornado Warning 15, NWS Denver/Boulder, CO

June 7, 2001Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 7, 2001, 5:15 PM MDT for Washington County, Colorado. It was in force for 30 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 7, 2001, 5:15 PM MDT (23:15 UTC)
Expired: Jun 7, 2001, 5:45 PM MDT
In force: 30 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Washington County, CO

The radar

The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 23:18 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 7, 5:40 PM MDT	Hail 2	Akron, CO	Large hail broke a windshield.
Jun 7, 5:40 PM MDT	Tornado F0	Akron, CO	A small tornado touched down but did no damage.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 7, 2:30 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.3 hours before the alert went out and 11 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: 499 J/kg
Mixed-layer CIN: -246 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 072316
TORDEN

COC121-072345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
515 PM MDT THU JUN 7 2001

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 545 PM MDT

* AT 515 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 13 MILES NORTHWEST OF         
  ELBA...OR ABOUT 8 MILES SOUTHWEST OF AKRON...MOVING SOUTHEAST AT 5 
  TO 10 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ELBA.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE
IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

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 THURSDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4015 10344 3990 10346 399o0 10317 4015 10318

KLEYLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 4:15 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	45 min
Jun 7, 4:31 PM MDT	Tornado Warning	BOU	Morgan, Washington	44 min
Jun 7, 4:32 PM MDT	Tornado Warning	BOU	Lincoln	43 min
Jun 7, 4:42 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	33 min
Jun 7, 5:03 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	42 min
Jun 7, 5:04 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	41 min
Jun 7, 5:43 PM MDT	Tornado Warning	BOU	Washington	32 min
Jun 7, 5:57 PM MDT	Tornado Warning	BOU	Lincoln	33 min

Nearby

Tornado Warnings in Colorado, 2001 Every tornado warning in 2001 Tornadoes in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.