Alert archive / Colorado / Tornado Warnings in 2008
Tornado Warning 36, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 20, 2008, 6:43 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 20, 2008, 6:43 PM MDT (00:43 UTC)
- Expired
- Jun 20, 2008, 7:21 PM MDT
- In force
- 38 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
Counties Adams County, CO, Arapahoe County, CO
The radar
The Denver radar (KFTG), 63 km from the middle of the area, began a volume at 00:45 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 20, 6:50 PM MDT | TORNADO | 11 Ne Deer Trail, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 19, 6:22 PM MDT | Severe Thunderstorm Watch | SPC | 27 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.7 hours before the alert went out and 55 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.
- Mixed-layer CAPE
- 515 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 2747 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KBOU 210043 TORBOU COC001-005-210130- /O.NEW.KBOU.TO.W.0036.080621T0043Z-080621T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 643 PM MDT FRI JUN 20 2008 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... EASTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO SOUTHEASTERN ADAMS COUNTY IN NORTHEAST COLORADO * UNTIL 730 PM MDT * AT 643 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER SOUTHEASTERN ADAMS COUNTY...OR 35 MILES SOUTH OF FORT MORGAN. THIS STORM WAS MOVING SOUTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTIES. 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 SAFE SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLFBALL SIZE AND DESTRUCTIVE STRAIGHT LINE WINDS UP TO 70 MPH. LAT...LON 3957 10371 3957 10400 3984 10400 3985 10371 TIME...MOT...LOC 0043Z 303DEG 18KT 3976 10388 $$ RPK
3 follow-up statements
000 WWUS55 KBOU 210056 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 656 PM MDT FRI JUN 20 2008 COC001-210105- /O.CAN.KBOU.TO.W.0036.000000T0000Z-080621T0130Z/ ADAMS CO- 655 PM MDT FRI JUN 20 2008 ...THE TORNADO WARNING FOR SOUTHEASTERN ADAMS COUNTY IS CANCELLED... LAT...LON 3957 10371 3957 10400 3974 10399 3974 10371 TIME...MOT...LOC 0055Z 303DEG 18KT 3965 10384 $$ COC005-210130- /O.CON.KBOU.TO.W.0036.000000T0000Z-080621T0130Z/ ARAPAHOE CO- 655 PM MDT FRI JUN 20 2008 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR EASTERN ARAPAHOE COUNTY... AT 655 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED OVER EAST CENTRAL ARAPAHOE COUNTY...OR 28 MILES NORTH OF LIMON. THIS STORM WAS MOVING SOUTH AT 30 MPH. THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTY. 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. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLFBALL SIZE AND DESTRUCTIVE STRAIGHT LINE WINDS IN EXCESS OF 70 MPH. LAT...LON 3957 10371 3957 10400 3974 10399 3974 10371 TIME...MOT...LOC 0055Z 303DEG 18KT 3965 10384 $$ RPK
000 WWUS55 KBOU 210107 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 707 PM MDT FRI JUN 20 2008 COC005-210130- /O.CON.KBOU.TO.W.0036.000000T0000Z-080621T0130Z/ ARAPAHOE CO- 706 PM MDT FRI JUN 20 2008 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR EASTERN ARAPAHOE COUNTY... AT 706 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED OVER EAST CENTRAL ARAPAHOE COUNTY...OR 24 MILES NORTH OF LIMON. THIS STORM WAS MOVING SOUTH SOUTHEAST AT 30 MPH. THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTY. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLFBALL SIZE AND DESTRUCTIVE STRAIGHT LINE WINDS IN EXCESS OF 70 MPH. LAT...LON 3957 10371 3957 10400 3974 10399 3974 10371 TIME...MOT...LOC 0106Z 303DEG 18KT 3962 10378 $$ RPK
000 WWUS55 KBOU 210121 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 721 PM MDT FRI JUN 20 2008 COC005-210130- /O.CAN.KBOU.TO.W.0036.000000T0000Z-080621T0130Z/ ARAPAHOE CO- 720 PM MDT FRI JUN 20 2008 ...THE TORNADO WARNING FOR EASTERN ARAPAHOE COUNTY IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA AND MOVED INTO NORTHEAST ELBERT AND NORTHWEST LINCOLN COUNTIES. LAT...LON 3957 10371 3957 10400 3974 10399 3974 10371 TIME...MOT...LOC 0120Z 303DEG 18KT 3958 10370 $$ RPK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 6:03 PM MDT | Tornado Warning | BOU | Adams | 42 min |
| Jun 20, 7:03 PM MDT | Tornado Warning | BOU | Elbert, Lincoln, Washington | 42 min |
| Jun 20, 7:37 PM MDT | Tornado Warning | BOU | Lincoln | 38 min |
| Jun 20, 7:43 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 37 min |
| Jun 20, 8:16 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 44 min |
| Jun 20, 8:26 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 49 min |
Nearby
Tornado Warnings in Colorado, 2008Every tornado warning in 2008Tornadoes in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.