Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 83, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 8, 1998, 6:00 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 45 min. 4 reports 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, 1998, 6:00 PM MDT (00:00 UTC)
- Expired
- Jun 8, 1998, 6:45 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Arapahoe County, CO
The radar
The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 00:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 6:05 PM MDT | Hail 1 | Littleton, CO | |
| Jun 8, 6:20 PM MDT | Hail 0.75 | (Apa)Englwood Arapah, CO | |
| Jun 8, 6:20 PM MDT | Hail 0.75 | Greenwood Vlg, CO | |
| Jun 8, 6:35 PM MDT | Hail 0.75 | Byers, 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.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.0 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
- 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What 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 15 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 15 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 15 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, 6:43 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 47 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.