Alert archive / Colorado / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 53, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 3, 1986, 4:48 PM MDT for Arapahoe County, Washington County, Colorado. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Aug 3, 1986, 4:48 PM MDT (22:48 UTC)
- Expired
- Aug 3, 1986, 5:45 PM MDT
- In force
- 57 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Arapahoe County, CO, Washington County, CO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.8 hours before the alert went out and 47 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
- 440 J/kg
- Mixed-layer CIN
- -303 J/kg
- Mixed-layer LCL
- 1851 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
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, Aug 3, 3:08 PM MDT, 1 hour 40 minutes before
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</html>The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:03 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 27 min |
| Aug 2, 6:45 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 35 min |
| Aug 2, 7:06 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Larimer, Weld | 54 min |
| Aug 2, 7:46 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Jefferson | 59 min |
| Aug 2, 7:46 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 59 min |
| Aug 2, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 55 min |
| Aug 2, 9:23 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 52 min |
| Aug 2, 10:14 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Elbert | 46 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1986Every severe thunderstorm warning in 1986
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.