Alert archive / Colorado / Tornado Warnings in 1989
Tornado Warning 3, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 8, 1989, 3:52 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 28 min. 1 report 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, 1989, 3:52 PM MDT (21:52 UTC)
- Expired
- Jun 8, 1989, 4:20 PM MDT
- In force
- 28 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, 4:15 PM MDT | Tornado F1 | Arapahoe, 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, 9.9 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
- 1855 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 73 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 082155
TORDEN
COC001-005-082220-
BULLETIN...EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
352 PM MDT THU JUN 08 1989
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 420 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF NORTHEAST COLORADO:
SOUTHWESTERN ADAMS
NORTHWESTERN ARAPAHOE
INCLUDING THE FOLLOWING TOWNS/CITIES:
AURORA
THE STORM WAS LOCATED NEAR THE MISSION VIEJO OF AURORA.
AT 350 PM A TORNADO CLOUD WAS REPORTED BY AURORA RESIDENTS
THE TORNADO IS MOVING NORTH NORTHEAST AT 10 MPH.
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 OR OTHER LOW SPOT.
IN ALL CASES..STAY AWAY FROM WINDOWS..DOORS AND OUTSIDE WALLS.
JML
L5AT..LON 3965 10496 3979 10481 3978 10463 3961 10480What 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 8, 12:54 PM MDT, 2 hours 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 100 PM MDT TUE JUN 6 1989 ...STRONG..SLOW-MOVING THUNDERSTORMS HAVE DEVELOPED OVER LARIMER COUNTY... PERSONS IN LARIMER COUNTY..ESPECIALLY IN THE VICINITY OF ROCKY MOUNTAIN NATIONAL PARK..SHOULD BE PREPARED FOR SLOW-MOVING STORMS THAT MAY PRODUCE HEAVY DOWNPOURS AND HAIL THIS AFTERNOON. STREAMS COULD RISE QUICKLY..AND PEOPLE SHOULD STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA FOR POSSIBLE UPDATES. DURING THE PAST COUPLE OF HOURS..STRONG THUNDERSTORMS HAVE DEVELOPED OVER WESTERN LARIMER COUNTY...AND WERE MOVING NORTHEAST ABOUT 10 MPH. AT 1245 PM MDT..THE STRONGEST STORM WAS ABOUT 10 MILES NORTHWEST OF ESTES PARK. MORE ACTIVITY WAS MOVING INTO THE AREA FROM THE WEST. AS THE AFTERNOON PROGRESSES..THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE REMAINDER OF THE FRONT RANGE. STORMS SHOULD ALSO SPRING UP OVER THE PLAINS BY EVENING..WHERE SEVERE WEATHER IS A POSSIBILITY. DULONG
Special weather statement, Jun 8, 2:27 PM MDT, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 220 PM MDT TUE JUN 6 1989 ...LOCALLY MODERATE TO HEAVY RAIN..SOME SNOW..IN LARIMER COUNTY... DURING THE PAST HOUR OR TWO..ROCKY MOUNTAIN NATIONAL PARK HAS RECEIVED AREAS OF MODERATE TO HEAVY RAINFALL. LUCKILY..NO SIGNIFICANT RISES IN STREAM LEVELS HAVE BEEN REPORTED. SNOW HAS BEEN FALLING OVER THE HIGHER PARTS OF TRAIL RIDGE ROAD.. PROMPTING A CLOSURE ABOVE HIDDEN VALLEY. DOPPLER RADAR SHOWS THIS ACTIVITY TO BE WEAKENING..BUT AREA STREAMS COULD STILL RISE BRIEFLY DUE TO RUNOFF. HIKERS AND DRIVERS IN THE AREA SHOULD TAKE CARE. AN OUFLOW OF RAIN COOLED AIR IS HEADING SOUTHEASTWARD OF OF LARIMER COUNTY..ANxD SHOULD BE A TRIGGER OF THUNDERSTORM DEVELOPMENT OVER EASTERN LARIMER..WESTERN WELD AND BOULDER COUNTIES DURING THE NEXT FEW HOURS. DULONG
Special weather statement, Jun 8, 2:35 PM MDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT ..CORRECTION TO TEXT.. NATIONAL WEATHER SERVICE DENVER COLORADO 220 PM MDT TUE JUN 6 1989 ...LOCALLY MODERATE TO HEAVY RAIN..SOME SNOW..IN LARIMER COUNTY... DURING THE PAST HOUR OR TWO..ROCKY MOUNTAIN NATIONAL PARK HAS RECEIVED AREAS OF MODERATE TO HEAVY RAINFALL. LUCKILY..NO SIGNIFICANT RISES IN STREAM LEVELS HAVE BEEN REPORTED. SNOW HAS BEEN FALLING OVER THE HIGHER PARTS OF TRAIL RIDGE ROAD.. PROMPTING A CLOSURE ABOVE HIDDEN VALLEY. DOPPLER RADAR SHOWS THIS ACTIVITY TO BE WEAKENING..BUT AREA STREAMS COULD STILL RISE BRIEFLY DUE TO RUNOFF. HIKERS AND DRIVERS IN THE AREA SHOULD TAKE CARE. AN OUTFLOW OF RAIN COOLED AIR IS HEADING SOUTHEASTWARD OF LARIMER COUNTY..AND SHOULD BE A TRIGGER OF THUNDERSTORM DEVELOPMENT OVER EASTERN LARIMER..WESTERN WELD AND BOULDER COUNTIES DURING THE NEXT FEW HOURS. DULONG
Special weather statement, Jun 8, 3:03 PM MDT, 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 3PM MDT THURSDAY JUNE 8 1989 ...LINE OF THUNDERSTORMS FROM WELD COUNTY TO DOUGLAS COUNTY... A LINE OF STRONG THUNDERSTORMS WAS DEVELOPING RAPIDLY BETWEEN 230PM MDT AND 3PM MDT. THIS LINE STRETCHED SOUTH ALONG THE BORDER OF WELD AND LARIMER COUNTIES THROUGH WESTERN ADAMS COUNTY OVER THE ROCKY MOUNTAIN ARSENAL THEN SOUTHWEST ACROSS THE DENVER METRO AREA AND INTO JEFFERSON COUNTY NEAR THE TOWN OF MORRISON. WHILE THIS LINE IS STILL IN THE PROCESS OF DEVELOPMENT...THE THUNDERSTORMS ALONG THIS LINE COULD PRODUCE HEAVY RAIN...HAIL AND GUSTY WINDS BETWEEN 3 AND 4PM MDT IN THIS AREA BEFORE MOVING FURTHER EAST. MOTORISTS SHOULD USE CAUTION IF RAIN IS ENCOUNTERED SINCE THE HEAVY RAIN MAY CAUSE PONDING OF WATER ON ROADWAYS AND LEAD TO SOME FLOODING IN LOW LYING AREAS AND DEPRESSIONS. WATER LEVELS IN SMALL CREEKS AND STREAMS MAY RISE QUITE RAPIDLY. IF THREATENING WEATHER IS SIGHTED... MOVE TO A PLACE OF SAFETY INDOORS. STAY TUNED TO LOCAL NEWS MEDIA AND NOAA WEATHER RADIO FOR FUTURE WEATHER BULLETINS AND FORECASTS. END...GCF...WSFO DENVER
Special weather statement, Jun 8, 3:35 PM MDT, 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 330 PM MDT THU JUN 8 1989 ...THUNDERSTORMS MOVING INTO LITTLETON... A COMPLEX OF THUNDERSTORMS WILL MOVE ACROSS LITTLETON COLORADO... SOUTHWEST ARAPAHOE COUNTY BETWEEN 330 PM AND 4 PM. THESE THUNDERSTORMS CONTAIN VERY HEAVY RAIN...DANGEROUS CLOUD TO GROUND LIGHTNING AND GUSTY WINDS. RESIDENTS SHOULD MOVE INDOORS....OBSERVE ALL LIGHTNING SAFETY RULES. MOTORISTS SHOULD NOT ATTEMPT TO DRIVE THROUGH FLOODED OR POORLY DRAINED STREETS. IF THESE STORMS MAINTAIN THEIR INTENSITY...SOUTHWEST DENVER AS WELL AS ENGLEWOOD WILL BE AFFECTED BETWEEN 400 AND 430 PM.
Nearby
Tornado Warnings in Colorado, 1989Every tornado warning in 1989Tornadoes in 1989
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.