Alert archive / Colorado / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 21, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 30, 1989, 5:30 PM MDT for Morgan County, Weld County, Colorado. It was in force for 60 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 30, 1989, 5:30 PM MDT (23:30 UTC)
- Expired
- Jun 30, 1989, 6:30 PM MDT
- In force
- 60 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Morgan County, CO, Weld 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 30, 6:40 PM MDT | Hail 4.5 | Morgan, 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, 11.5 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
- 11 J/kg
- Mixed-layer CIN
- -413 J/kg
- Mixed-layer LCL
- 2569 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 51 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 302335
SVRDEN
COC087-123-010030-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
530 PM MDT FRI JUN 30 1989
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
NORTHEASTERN MORGAN
NORTHEASTERN WELD
INCLUDING THE FOLLOWING TOWNS/CITIES:
BRUSH..FT MORGAN..NEW RAYMER..AND STONEHAM
THE STORM WAS LOCATED 3 MILES NORTH OF STONEHAM..WHICH IS 24
MILES WEST OF STERLING.
AT 530 PM MDT RADAR INDICATED A POSSIBLE SEVERE THUNDERSTORM OVER
STONEHAM MOVING TOWARDS THE SOUTH SOUTHEAST AT 25 MILES AND HOUR.
CURRENT MOVEMENT WILL PUT THIS STORM NEAR THE TOWN OF BUSH BY
AROUND 615 PM. LARGE HAIL IS LIKELY ALONG WITH DAMAGING WINDS.
IF SEVERE WEATHER APPROACHES YOUR AREA..GO TO A STURDY
SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD PRONE AREAS.
REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING
HAIL..DAMAGING WINDS OF OVER 60 MPH..DEADLY LIGHTNING..AND
HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF
EASTERN COLORADO.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE
IN DENVER..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663. DO NOT CALL THIS NUMBER FOR INFORMATION.
DULONGz
LAT..LON 4072 10379 4072 10357 4023 10346 4025 10380Nearby
Severe Thunderstorm Warnings in Colorado, 1989Every severe thunderstorm warning 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.