Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 94, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 22, 1998, 5:33 PM MDT for Adams County, Denver County, Jefferson County, Colorado. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 22, 1998, 5:33 PM MDT (23:33 UTC)
- Expired
- Jun 22, 1998, 6:15 PM MDT
- In force
- 42 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Adams County, CO, Denver County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 44 km from the middle of the area, began a volume at 23:32 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 11.6 hours before the alert went out and 157 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
- 37 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 1519 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
859
WUUS1 KDEN 222335 RRA
SVRDEN
COC001-031-059-230015-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
533 PM MDT MON JUN 22 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN ADAMS COUNTY IN NORTHEAST COLORADO
NORTHERN DENVER COUNTY IN NORTHEAST COLORADO
NORTHEASTERN JEFFERSON COUNTY IN NORTHEAST COLORADO
* UNTIL 615 PM MDT
* AT 533 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 3 MILES NORTHWEST OF LAKEWOOD...OR ABOUT 9
MILES WEST OF DENVER...MOVING NORTHEAST AT 15 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...ARVADA...COMMERCE CITY...
NORTHERN DENVER...LAKEWOOD...THORNTON...WESTMINSTER...
WHEAT RIDGE AND FEDERAL HEIGHTS
LAT...LON 3981 10518 3969 10519 3975 10488 3991 10489
BARJENBRUCHWhat forecasters said that day
The local office's own words before this severe thunderstorm 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 22, 4:45 PM MDT, 48 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 445 PM MDT MON JUN 22 1998 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: THE FIRST THUNDERSTORM OF THE DAY HAS CREATED A WIND SHIFT LINE ACROSS THE DENVER METRO AREA. THIS HAS LESSENED THE CHANCE OF SEVERE WEATHER FARTHER NORTH IN THE GREELEY AND FORT COLLINS AREA. THE MAIN AREA FOR THUNDERSTORM DEVELOPMENT FOR THE REST OF THE AFTERNOON WILL BE IN THE AREA BETWEEN DENVER AND LAST CHANCE. FARTHER EAST...THE AIRMASS REMAINS MOIST AND UNSTABLE. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED THIS EVENING FROM LAST CHANCE AND NEW RAYMER EAST. HAIL IN THE ONE TO TWO INCH DIAMETER RANGE WILL BE THE MAIN FEATURE OF STORMS THIS EVENING...BUT DAMAGING WINDS...TORNADOES...AND HEAVY RAIN ARE ALSO POSSIBLE. AMATEUR RADIO SPOTTERS HAVE BEEN ACTIVATED IN THE DENVER AREA. YOU CAN REPORT SEVEVRE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICIALS WHO WILL RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE. GIMMESTAD
Special weather statement, Jun 22, 4:45 PM MDT, 48 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 445 PM MDT MON JUN 22 1998 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: THE FIRST THUNDERSTORM OF THE DAY HAS CREATED A WIND SHIFT LINE ACROSS THE DENVER METRO AREA. THIS HAS LESSENED THE CHANCE OF SEVERE WEATHER FARTHER NORTH IN THE GREELEY AND FORT COLLINS AREA. THE MAIN AREA FOR THUNDERSTORM DEVELOPMENT FOR THE REST OF THE AFTERNOON WILL BE IN THE AREA BETWEEN DENVER AND LAST CHANCE. FARTHER EAST...THE AIRMASS REMAINS MOIST AND UNSTABLE. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED THIS EVENING FROM LAST CHANCE AND NEW RAYMER EAST. HAIL IN THE ONE TO TWO INCH DIAMETER RANGE WILL BE THE MAIN FEATURE OF STORMS THIS EVENING...BUT DAMAGING WINDS...TORNADOES...AND HEAVY RAIN ARE ALSO POSSIBLE. AMATEUR RADIO SPOTTERS HAVE BEEN ACTIVATED IN THE DENVER AREA. YOU CAN REPORT SEVEVRE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICIALS WHO WILL RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE. GIMMESTAD
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 3:43 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 47 min |
| Jun 22, 4:04 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 26 min |
| Jun 22, 5:16 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 44 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.