Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 168, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Oct 16, 1998, 2:33 PM MDT for Arapahoe County, Colorado. It was in force for 42 min. 2 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
- Oct 16, 1998, 2:33 PM MDT (20:33 UTC)
- Expired
- Oct 16, 1998, 3:15 PM MDT
- In force
- 42 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Arapahoe County, CO
The radar
The Denver radar (KFTG), 23 km from the middle of the area, began a volume at 20:36 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 |
|---|---|---|---|
| Oct 16, 2:40 PM MDT | Hail 0.75 | (Bkf)Buckley Fld Nas, CO | |
| Oct 16, 2:45 PM MDT | Hail 2 | (Bkf)Buckley Fld Nas, 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, 8.6 hours before the alert went out and 98 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
- 222 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 629 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 134 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, Oct 16, 11:25 AM MDT, 3 hours 8 minutes before
COZ030-032>050-170600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1125 AM MDT FRI OCT 16 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: AN APPROACHING UPPER LEVEL STORM CENTERED OVER SOUTHERN UTAH ALONG WITH MOIST NORTHEAST UPSLOPE FLOW OVER MUCH OF NORTHEAST COLORADO WILL CREATE AN UNSTABLE WEATHER SITUATION FOR MUCH OF THE FORECAST AREA THIS AFTERNOON AND TONIGHT. CURRENTLY...MODERATE SHOWERS AND A FEW THUNDERSTORMS WERE OCCURRING ALONG THE FRONT RANGE OF WELD AND BOULDER COUNTIES. SNOW SHOWERS WERE ALSO SCATTERED OVER THE HIGHER AREAS OF THE REST OF LARIMER AS WELL AS JACKSON COUNTIES. MOIST UPSLOPE FLOW ALONG WITH ADDITIONAL LIFT FROM THE LARGE UPPER LEVEL STORM WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS OVER MOST OF THE PLAINS THIS AFTERNOON INTO THE EVENING...WITH SNOW SHOWERS BECOMING LIKELY IN THE ALPINE AREAS. SEVERE WEATHER IS NOT EXPECTED...HOWEVER WITH THE FREEZING LEVELS CONTINUING TO LOWER THROUGH THE DAY...HAIL AND OR ICE PELLETS WILL BE A GOOD BET WITH ANY THUNDERSTORMS. SOME MINOR FLOODING IS ALSO POSSIBLE WITH THE HEAVIER SHOWERS. SATURDAY'S WEATHER WILL SEE CONTINUED MOISTURE...CLOUDINESS...AND PRECIPITATION FOR AT LEAST THE FIRST HALF OF THE DAY...WITH SLOW IMPROVEMENT FOR THE LATER HALF. RJK
Special weather statement, Oct 16, 11:25 AM MDT, 3 hours 8 minutes before
COZ030-032>050-170600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1125 AM MDT FRI OCT 16 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: AN APPROACHING UPPER LEVEL STORM CENTERED OVER SOUTHERN UTAH ALONG WITH MOIST NORTHEAST UPSLOPE FLOW OVER MUCH OF NORTHEAST COLORADO WILL CREATE AN UNSTABLE WEATHER SITUATION FOR MUCH OF THE FORECAST AREA THIS AFTERNOON AND TONIGHT. CURRENTLY...MODERATE SHOWERS AND A FEW THUNDERSTORMS WERE OCCURRING ALONG THE FRONT RANGE OF WELD AND BOULDER COUNTIES. SNOW SHOWERS WERE ALSO SCATTERED OVER THE HIGHER AREAS OF THE REST OF LARIMER AS WELL AS JACKSON COUNTIES. MOIST UPSLOPE FLOW ALONG WITH ADDITIONAL LIFT FROM THE LARGE UPPER LEVEL STORM WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS OVER MOST OF THE PLAINS THIS AFTERNOON INTO THE EVENING...WITH SNOW SHOWERS BECOMING LIKELY IN THE ALPINE AREAS. SEVERE WEATHER IS NOT EXPECTED...HOWEVER WITH THE FREEZING LEVELS CONTINUING TO LOWER THROUGH THE DAY...HAIL AND OR ICE PELLETS WILL BE A GOOD BET WITH ANY THUNDERSTORMS. SOME MINOR FLOODING IS ALSO POSSIBLE WITH THE HEAVIER SHOWERS. SATURDAY'S WEATHER WILL SEE CONTINUED MOISTURE...CLOUDINESS...AND PRECIPITATION FOR AT LEAST THE FIRST HALF OF THE DAY...WITH SLOW IMPROVEMENT FOR THE LATER HALF. RJK
Special weather statement, Oct 16, 12:35 PM MDT, 1 hour 58 minutes before
COZ039-040-161930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 1235 PM MDT FRI OCT 16 1998 ...HAIL PRODUCING THUNDERSTORM OVER THE NORTHWEST DENVER METRO AREA... AT 1230 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER NORTHWEST JEFFERSON AND SOUTHEAST BOULDER COUNTIES. THE STORM WAS MOVING SLOWLY EAST...ABOUT 5 MILES PER HOUR. LITTLE RAIN WAS REPORTED WITH THIS STORM...HOWEVER SMALL...PEA. SIZED...HAIL WAS REPORTED AND IS WAS BEGINNING TO ACCUMULATE. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DENVER. RJK
Special weather statement, Oct 16, 12:35 PM MDT, 1 hour 58 minutes before
COZ039-040-161930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 1235 PM MDT FRI OCT 16 1998 ...HAIL PRODUCING THUNDERSTORM OVER THE NORTHWEST DENVER METRO AREA... AT 1230 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER NORTHWEST JEFFERSON AND SOUTHEAST BOULDER COUNTIES. THE STORM WAS MOVING SLOWLY EAST...ABOUT 5 MILES PER HOUR. LITTLE RAIN WAS REPORTED WITH THIS STORM...HOWEVER SMALL...PEA. SIZED...HAIL WAS REPORTED AND IS WAS BEGINNING TO ACCUMULATE. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DENVER. RJK
Special weather statement, Oct 16, 12:55 PM MDT, 1 hour 38 minutes before
COZ039-040-161930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 1255 PM MDT FRI OCT 16 1998 ...HAIL PRODUCING THUNDERSTORMS CONTINUING OVER THE NORTHWEST DENVER METRO AREA... AT 1255 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS OVER NORTHWEST JEFFERSON...SOUTHEAST BOULDER...AND EXTREME WESTERN ADAMS COUNTY. THE STORMS WERE MOVING SLOWLY EAST...ABOUT 5 MILES PER HOUR. LITTLE RAIN WAS REPORTED WITH THESE STORMS BUT SMALL PEA SIZED HAIL HAS BEEN ACCUMULATING TO AS DEEP AS 3 INCHES IN WEST CENTRAL ARVADA. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DENVER. RJK
Special weather statement, Oct 16, 2:06 PM MDT, 27 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 |
|---|---|---|---|---|
| Oct 16, 1:15 PM MDT | Severe Thunderstorm Warning | BOU | Denver, Jefferson | 45 min |
| Oct 16, 1:41 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 49 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.