Alert archive / Colorado / Tornado Warnings in 2001

Tornado Warning 38, NWS Denver/Boulder, CO

July 9, 2001Morgan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 9, 2001, 8:17 PM MDT for Morgan County, Colorado. It was in force for 43 min. 3 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: Jul 9, 2001, 8:17 PM MDT (02:17 UTC)
Expired: Jul 9, 2001, 9:00 PM MDT
In force: 43 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Morgan County, CO

What was reported inside it

Time	Report	Where	Remark
Jul 9, 8:30 PM MDT	Hail 1.5	Brush, CO
Jul 9, 8:44 PM MDT	Tornado F0	Brush, CO	A small tornado touched down but did no damage.
Jul 9, 9:10 PM MDT	Tornado F0	Brush, 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
Jul 9, 5:45 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.3 hours before the alert went out and 66 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: 323 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 2587 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 8 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 100218
TORDEN

COC087-100300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
817 PM MDT MON JUL 9 2001

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 900 PM MDT

* AT 817 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 7 MILES NORTHWEST OF GARY...OR
  ABOUT 10 MILES SOUTHEAST OF FORT MORGAN...MOVING NORTHEAST AT 20
  MPH.

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

SPOTTERS REPORTED A TORNADO ON THE GROUND OVER THE SNYDER AREA. THIS 
WARNING REPLACES THE EARLIER SEVERE THUNDERSTORM WARNING.


IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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 4017 10381 4000 10374 4001 10348 4026 10350

SWE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 6:27 PM MDT	Flash Flood Warning	BOU	Arapahoe	2 hr
Jul 9, 6:36 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	39 min
Jul 9, 8:00 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	45 min
Jul 9, 8:39 PM MDT	Severe Thunderstorm Warning	BOU	Weld	51 min
Jul 9, 8:46 PM MDT	Tornado Warning	BOU	Morgan, Washington	29 min
Jul 9, 9:39 PM MDT	Flash Flood Warning	BOU	Morgan	2 hr
Jul 10, 4:03 AM MDT	Severe Thunderstorm Warning	BOU	Phillips	27 min
Jul 10, 4:46 PM MDT	Severe Thunderstorm Warning	BOU	Clear Creek	29 min
Jul 10, 5:46 PM MDT	Flash Flood Warning	BOU	Clear Creek	119 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.