Alert archive / Colorado / Tornado Warnings in 1986
Tornado Warning 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 9, 1986, 10:27 AM MDT for Weld County, Colorado. It was in force for 23 min.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1986, 10:27 AM MDT (16:27 UTC)
- Expired
- Jun 9, 1986, 10:50 AM MDT
- In force
- 23 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Weld 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, 4.5 hours before the alert went out and 125 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 091627 TORDEN COC123-091650- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 1027 AM MDT MON JUN 9 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1050 AM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST COLORADO...EXTREME SOUTHWEST WELD THIS WARNING INCLUDES THE FOLLOWING TOWNS AND CITIES... FORT LUPTON ..HUDSON. AT 1020 AM MDT THE PUBLIC REPORTED A TORNADO TOUCHDOWN JUST EAST OF THE TOWN OF BRIGHTON..THAT IS..ABOUT 20 MILES NORTHEAST OF DOWNTOWN DENVER. THE TORNADO WAS MOVING NORTH AT 20 MILES PER HOUR. IF YOU ARE IN THIS AREA 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 YOU,R REPORTS TO THE NATIONAL 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, 4:53 AM MDT, 5 hours 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 450 AM MDT MON JUN 9 1986 ...SEVERE WEATHER AND HEAVY RAIN POSSIBLE IN EASTERN COLORADO... INTENSE THUNDERSTORMS ARE POSSIBLE OVER EASTERN COLORADO AGAIN THIS AFTERNOON INTO TONIGHT. DAMAGING WINDS...LARGE HAIL...HEAVY RAIN AND DANGEROUS LIGHTNING ARE POSSIBLE WITH THE THUNDERSTORMS. SEVERE THUNDERSORMS CAN SPAWN TORNADOES. PERSONS IN COLORADO...ESPECIALLY EAST OF THE CONTINENTAL DIVIDE SHOULD KEEP THEMSELVES INFORMED ON THE LATEST WEATHER DEVELOPMENTS TODAY AND TONIGHT AND BE PREPARED TO TAKE ACTION SHOULD WATCHES OR WARNINGS BECOME NECESSARY. THE COMBINATION OF MOIST UNSTABLE AIR OVER EASTERN COLORADO AND STORM MOVING OVER THE STATE FROM THE WEST WILL TRIGGER THUNDERSTORMS THIS AFTERNOON AND EVENING. THE ATMOSPHERE IS EXPECTED TO BECOME VERY UNSTABLE ESPECIALLY OVER EASTERN COLORADO AND POTENTIALLY VIOLENT THUNDERSTORMS ARE POSSIBLE. ALL INTERESTS SHOULD MONITOR NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION FOR UPDATED WEATHER INFORMATION AND FORECASTS. BALINT
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, 3:46 PM MDT | Tornado Warning | BOU | Adams, Arapahoe | 24 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.