Alert archive / Colorado / Tornado Warnings in 2001

Tornado Warning 47, NWS Denver/Boulder, CO

August 1, 2001Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Aug 1, 2001, 6:55 PM MDT for Lincoln County, Colorado. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 1, 2001, 6:55 PM MDT (00:55 UTC)
Expired: Aug 1, 2001, 7:30 PM MDT
In force: 35 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Lincoln County, CO

The radar

The Denver radar (KFTG), 90 km from the middle of the area, began a volume at 00:57 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
Aug 1, 4:30 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.9 hours before the alert went out and 56 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: 152 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 2178 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 20 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.

931 
WFUS55 KBOU 020055
TORDEN
COC073-020130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
655 PM MDT WED AUG 1 2001

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO
  THIS INCLUDES THE CITY OF LIMON

* UNTIL 730 PM MDT

* AT 655 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 7 MILES NORTH OF LIMON...
  MOVING NORTHEAST AT 20 MPH.

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

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.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.

LAT...LON 3956 10371 3925 10371 3929 10349 3946 10342
          3957 10349

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 6:13 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	47 min
Aug 1, 6:46 PM MDT	Severe Thunderstorm Warning	BOU	Washington	29 min
Aug 1, 7:20 PM MDT	Tornado Warning	BOU	Lincoln, Washington	40 min
Aug 1, 7:35 PM MDT	Severe Thunderstorm Warning	BOU	Washington	25 min
Aug 1, 7:48 PM MDT	Severe Thunderstorm Warning	BOU	Washington	27 min
Aug 1, 8:01 PM MDT	Tornado Warning	BOU	Washington	29 min
Aug 1, 8:15 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	30 min
Aug 1, 8:19 PM MDT	Severe Thunderstorm Warning	BOU	Washington	31 min
Aug 1, 9:40 PM MDT	Severe Thunderstorm Warning	BOU	Phillips, Sedgwick	50 min
Aug 2, 2:53 PM MDT	Flash Flood Warning	BOU	Adams, Weld	2 hr
Aug 2, 3:18 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	27 min
Aug 2, 3:47 PM MDT	Tornado Warning	BOU	Adams	43 min
Aug 2, 4:42 PM MDT	Severe Thunderstorm Warning	BOU	Weld	38 min
Aug 2, 5:49 PM MDT	Severe Thunderstorm Warning	BOU	Weld	41 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.