Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 84, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 8, 1998, 6:43 PM MDT for Arapahoe County, Elbert County, Colorado. It was in force for 47 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 8, 1998, 6:43 PM MDT (00:43 UTC)
- Expired
- Jun 8, 1998, 7:30 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Arapahoe County, CO, Elbert County, CO
The radar
The Denver radar (KFTG), 37 km from the middle of the area, began a volume at 00:47 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 00:00Z, 0.7 hours before the alert went out and 89 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
- 1120 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
174
WUUS1 KDEN 090045 RRA
SVRDEN
COC005-039-090130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
643 PM MDT MON JUN 8 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL ELBERT COUNTY IN EAST CENTRAL COLORADO
CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO
* UNTIL 730 PM MDT
* AT 641 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 16 MILES WEST OF DEER TRAIL...OR ABOUT 35 MILES
EAST OF DENVER...MOVING EAST AT 25 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...AGATE AND DEER TRAIL
HAIL UP TO 1 INCH DIAMETER IS POSSIBLE WITH THIS SEVERE THUNDERSTORM.
IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND
MOVE TO A SUBSTANTIAL SHELTER.
LAT...LON 3966 10441 3951 10439 3944 10394 3966 10387
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 8, 1:45 PM MDT, 4 hours 58 minutes before
COZ035-038-043-082030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO...CORRECTED 145 PM MDT MON JUN 8 1998 .CORRECTED HEADER... ...STRONG THUNDERSTORMS IN EASTERN LARIMER COUNTY... AT 140 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS EXTENDING FROM FORT COLLINS TO VIRGINIA DALE. AT 135 PM MDT A WEATHER SPOTTER REPORTED PEA SIZE HAIL OCCURRING AT FORT COLLINS WITH ONE OF THE STORMS. THE STORMS WERE MOVING EAST AT 10 TO 15 MILES PER HOUR. PERSONS IN OR NEAR FORT COLLINS...GREELEY...AULT...EATON...GALETON... HARMONY...LUCERNE...NUNN...PIERCE...PURCELL...SEVERANCE...TIMNATH... WELLINGTON AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY WHEN THE STORMS APPROACH. DANGEROUS LIGHTNING...PEA TO MARBLE SIZE HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. COOPER
Special weather statement, Jun 8, 1:45 PM MDT, 4 hours 58 minutes before
COZ035-038-043-082030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO...CORRECTED 145 PM MDT MON JUN 8 1998 .CORRECTED HEADER... ...STRONG THUNDERSTORMS IN EASTERN LARIMER COUNTY... AT 140 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS EXTENDING FROM FORT COLLINS TO VIRGINIA DALE. AT 135 PM MDT A WEATHER SPOTTER REPORTED PEA SIZE HAIL OCCURRING AT FORT COLLINS WITH ONE OF THE STORMS. THE STORMS WERE MOVING EAST AT 10 TO 15 MILES PER HOUR. PERSONS IN OR NEAR FORT COLLINS...GREELEY...AULT...EATON...GALETON... HARMONY...LUCERNE...NUNN...PIERCE...PURCELL...SEVERANCE...TIMNATH... WELLINGTON AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY WHEN THE STORMS APPROACH. DANGEROUS LIGHTNING...PEA TO MARBLE SIZE HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. COOPER
Special weather statement, Jun 8, 1:45 PM MDT, 4 hours 58 minutes before
COZ035-038-043-08230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 145 PM MDT MON JUN 8 1998 ...STRONG THUNDERSTORMS IN EASTERN LARIMER COUNTY... AT 140 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS EXTENDING FROM FORT COLLINS TO VIRGINIA DALE. AT 135 PM MDT A WEATHER SPOTTER REPORTED PEA SIZE HAIL OCCURRING AT FORT COLLINS WITH ONE OF THE STORMS. THE STORMS WERE MOVING EAST AT 10 TO 15 MILES PER HOUR. PERSONS IN OR NEAR FORT COLLINS...GREELEY...AULT...EATON...GALETON... HARMONY...LUCERNE...NUNN...PIERCE...PURCELL...SEVERANCE...TIMNATH... WELLINGTON AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY WHEN THE STORMS APPROACH. DANGEROUS LIGHTNING...PEA TO MARBLE SIZE HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. COOPER
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 | Adams, Arapahoe | 45 min |
| Jun 8, 7:30 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 45 min |
| Jun 9, 4:35 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 40 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.