Alert archive / Colorado / Tornado Warnings in 1986
Tornado Warning 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 9, 1986, 3:46 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 24 min.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1986, 3:46 PM MDT (21:46 UTC)
- Expired
- Jun 9, 1986, 4:10 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Arapahoe County, CO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.8 hours before the alert went out and 95 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1478 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDEN 092146 TORDEN COC001-005-092210- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 346 PM MDT MON JUN 9 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 410 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST COLORADO...EASTERN ADAMS AND EASTERN ARAPAHOE THIS WARNING INCLUDES THE FOLLOWING TOWNS AND CITIES... STRASBERG.. DEER TRAIL AND BYERS. AT 340 PM MDT THE PUBLIC REPORTED SEVERAL FUNNEL CLOUDS 40 MILES EAST OF DENVER SOUTHEAST OF THE TOWN OF STRASBERG. THE FUNNEL CLOUDS ARE MOVING TO THE NORTHEAST AT 15 MPH. TAKE COVER IMMEDIATELY. IN HOMES GO TO THE BASEMENT OR INTO A CLOSET OR BATHROOM. IN SCHOOLS ...HIGH RISES AND HOSPITALS GO TO AN INTERIOR HALLWAY ON THE LOWEST FLOOR. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GO TO A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE..LIE FLAT IN THE NEAREST DITCH...GULLY OR OTHER LOW SPOT. < IN ALL CASES...STAY AWAY FROM WINDOWS...DOORS AND OUTSIDE WALLS. PROTECT YOUR HEAD AND FACE. TRY TO GET UNDER SOMETHING STURDY. TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORTS TO THE NATIONA8L WEATHER SERVICE IN DENVER...OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN DENVER AT 361-0663. DO NOT CALL THIS NUMBER FOR INFORMATION. THALER
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 9, 3:28 PM MDT, 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 330 PM MDT MON JUN 9 1986 ...HEAVY THUNDERSTORM IN DOUGLAS COUNTY... AT 325PM MDT RADAR INDICATED A VERY HEAVY THUNDERSTORM IN NORTHWESTERN DOUGLAS COUNTY JUST WEST OF CASTLE ROCK. THE STORM WAS MOVING SLOWLY TOWARD THE EAST AT 5 MPH. A NUMBER OF FUNNEL CLOUDS HAVE BEEN REPORTED BY THE PUBLIC WITH THIS STORM..AND PEOPLE IN NORTHERN DOUGLAS COUNTY SHOULD BE ALERT FOR HEAVY RAIN AND HAIL. AND...TORNADOES CANNOT BE RULED OUT. MARKKANEN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 6:00 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 60 min |
| Jun 9, 9:49 AM MDT | Tornado Warning | BOU | Adams, Arapahoe, Boulder, Jefferson | 26 min |
| Jun 9, 10:27 AM MDT | Tornado Warning | BOU | Weld | 23 min |
Nearby
Tornado Warnings in Colorado, 1986Every tornado warning in 1986Tornadoes in 1986
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.