Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 134, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 29, 1998, 5:32 PM MDT for Washington County, Colorado. It was in force for 43 min. 3 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
- Jul 29, 1998, 5:32 PM MDT (23:32 UTC)
- Expired
- Jul 29, 1998, 6:15 PM MDT
- In force
- 43 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Washington County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 29, 5:45 PM MDT | Hail 1.75 | Akron, CO | |
| Jul 29, 5:47 PM MDT | Thunderstorm Wind 58 | Akron, CO | |
| Jul 29, 5:48 PM MDT | Hail 1 | Elba, 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 12:00Z, 11.5 hours before the alert went out and 11 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
- 2 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 1470 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 34 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, Jul 29, 2:55 PM MDT, 2 hours 37 minutes before
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</html>Special weather statement, Jul 29, 2:55 PM MDT, 2 hours 37 minutes before
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</html>Special weather statement, Jul 29, 5:00 PM MDT, 32 minutes before
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</html>Special weather statement, Jul 29, 5:20 PM MDT, 12 minutes before
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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.