Alert archive / Colorado / Tornado Warnings in 1986
Tornado Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 8, 1986, 5:17 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 23 min. 2 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
- Jun 8, 1986, 5:17 PM MDT (23:17 UTC)
- Expired
- Jun 8, 1986, 5:40 PM MDT
- In force
- 23 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 5:20 PM MDT | Tornado F1 | Adams, CO | |
| Jun 8, 5:20 PM MDT | Tornado F1 | Adams, CO |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.3 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
- 117 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 776 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 50 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 082317 RRA TORDEN COC005-082340- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 517 PM MDT SUN JUN 8 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 540 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST COLORADO...WESTERN ARAPAHOE THIS WARNING INCLUDES THE FOLLOWING TOWNS AND CITIES... AURORA AT 510 PM MDT WEATHER SERVICE PERSONNEL OBSERVED SEVERAL TORNADOES ON THE GROUND IN AURORA. TAKE COVER IMMEDIATELY. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING WINDS OF OVER 60 MPH...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED. 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 NATIONAL WEATHER SERVICE IN DENVER...OR CALoL YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN DENVER AT 361-0663. DO NOT CALL THIS NUMBER FOR INFORMATION. A TORNADO WATCH REMAINS IN AFFECT FOR MOST OF NORTHEAST COLORADO TIL 8 PM MDT THIS SUNDAY EVENING. THALER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 7:37 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 53 min |
| Jun 8, 3:26 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 54 min |
| Jun 8, 4:40 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 65 min |
| Jun 8, 5:44 PM MDT | Tornado Warning | BOU | Adams | 26 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.