Alert archive / Colorado / Tornado Warnings in 2000

Tornado Warning 23, NWS Denver/Boulder, CO

July 12, 2000Morgan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 12, 2000, 4:13 PM MDT for Morgan County, Colorado. It was in force for 32 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
Jul 12, 2000, 4:13 PM MDT (22:13 UTC)
Expired
Jul 12, 2000, 4:45 PM MDT
In force
32 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Morgan County, CO

The radar

The Denver radar (KFTG), 71 km from the middle of the area, began a volume at 22:13 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.

IssuedProductOfficeLasted
Jul 12, 2:15 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.2 hours before the alert went out and 58 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2000-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2000-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
40 J/kg
Mixed-layer CIN
-362 J/kg
Mixed-layer LCL
1871 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 122216
TORDEN
COC087-122245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
413 PM MDT WED JUL 12 2000

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 445 PM MDT

* AT 413 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 4 MILES NORTH OF ADENA        
  SCHOOL...OR ABOUT 6 MILES SOUTH OF FORT MORGAN...MOVING SOUTH      
  SOUTHWEST AT 10 MPH.

A STORM SPOTTER HAS ALREADY SEEN A FUNNEL CLOUD DEVELOPING FROM THIS 
STORM.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
TWELVE-MILE CORNER...BRUSH AND ADENA SCHOOL.

THE TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT 
WAS IN EFFECT FOR SOUTHEAST MORGAN COUNTY.

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING 
SITUATION. IF YOU ARE IN THE PATH OF THIS LARGE AND DESTRUCTIVE 
TORNADO...TAKE COVER IMMEDIATELY.

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 4016 10395 4001 10398 4001 10368 4027 10360

COOPER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 2:48 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington42 min
Jul 12, 2:52 PM MDTSevere Thunderstorm WarningBOULogan53 min
Jul 12, 3:30 PM MDTFlash Flood WarningBOUMorgan90 min
Jul 12, 3:44 PM MDTSevere Thunderstorm WarningBOUMorgan46 min
Jul 12, 3:46 PM MDTSevere Thunderstorm WarningBOULogan44 min
Jul 12, 3:57 PM MDTSevere Thunderstorm WarningBOUMorgan48 min
Jul 12, 4:25 PM MDTSevere Thunderstorm WarningBOULogan50 min
Jul 12, 4:43 PM MDTSevere Thunderstorm WarningBOUMorgan47 min
Jul 12, 4:48 PM MDTSevere Thunderstorm WarningBOUWeld42 min
Jul 12, 4:53 PM MDTTornado WarningBOUMorgan37 min
Jul 12, 5:04 PM MDTFlash Flood WarningBOUMorgan3 hr
Jul 12, 5:13 PM MDTSevere Thunderstorm WarningBOULogan47 min
Jul 12, 5:37 PM MDTSevere Thunderstorm WarningBOUWeld38 min

Nearby

Tornado Warnings in Colorado, 2000Every tornado warning in 2000Tornadoes in 2000

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.