Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 54, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 24, 1998, 10:59 AM MDT for Washington County, Colorado. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 24, 1998, 10:59 AM MDT (16:59 UTC)
- Expired
- May 24, 1998, 11:45 AM MDT
- In force
- 46 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Washington County, CO
The radar
The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 16:59 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 12:00Z, 5.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1490 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 47 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, May 24, 10:45 AM MDT, 14 minutes before
COZ030-032>050-250600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1045 AM MDT SUN MAY 24 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: TODAYS ATMOSPHERIC CONDITIONS FEATURE AMPLE MOISTURE...STRONG INSTABILITY...GENERAL UPSLOPE FLOW...AND UPPER LEVEL LIFT...ALL WHICH WILL SUPPORT SCATTERED THUNDERSTORM DEVELOPMENT ACROSS MOST OF THE FORECAST AREA. TODAYS STORMS WILL PRODUCE HEAVY RAINS AND HAIL. THE BEST CHANCE OF SEVERE THUNDERSTORMS WILL BE ALONG THE PALMER RIDGE OF ELBERT AND NORTHERN LINCOLN COUNTIES...THEN INTO WASHINGTON COUNTY. THE VERTICAL WIND PROFILE INTO THE UPPER ATMOSPHERE SHOWS THE WIND DIRECTIONS FAVORABLE FOR PRODUCTION OF THUNDERSTORMS THAT PRODUCE TORNADOES... BUT THE WIND SPEEDS ARE FAIRLY LOW. HOWEVER...THESE SPEEDS ARE EXPECTED TO INCREASE BY LATE AFTERNOON...ESPECIALLY OVER THE SOUTHERN PART OF THE FORECAST AREA...THE PALMER RIDGE REGION. SPOTTER ACTIVATION MAY BE REQUIRED BY EARLY AFTERNOON FOR MUCH OF NORTHEAST COLORADO. RJK
Special weather statement, May 24, 10:45 AM MDT, 14 minutes before
COZ030-032>050-250600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1045 AM MDT SUN MAY 24 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: TODAYS ATMOSPHERIC CONDITIONS FEATURE AMPLE MOISTURE...STRONG INSTABILITY...GENERAL UPSLOPE FLOW...AND UPPER LEVEL LIFT...ALL WHICH WILL SUPPORT SCATTERED THUNDERSTORM DEVELOPMENT ACROSS MOST OF THE FORECAST AREA. TODAYS STORMS WILL PRODUCE HEAVY RAINS AND HAIL. THE BEST CHANCE OF SEVERE THUNDERSTORMS WILL BE ALONG THE PALMER RIDGE OF ELBERT AND NORTHERN LINCOLN COUNTIES...THEN INTO WASHINGTON COUNTY. THE VERTICAL WIND PROFILE INTO THE UPPER ATMOSPHERE SHOWS THE WIND DIRECTIONS FAVORABLE FOR PRODUCTION OF THUNDERSTORMS THAT PRODUCE TORNADOES... BUT THE WIND SPEEDS ARE FAIRLY LOW. HOWEVER...THESE SPEEDS ARE EXPECTED TO INCREASE BY LATE AFTERNOON...ESPECIALLY OVER THE SOUTHERN PART OF THE FORECAST AREA...THE PALMER RIDGE REGION. SPOTTER ACTIVATION MAY BE REQUIRED BY EARLY AFTERNOON FOR MUCH OF NORTHEAST COLORADO. RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 10:16 AM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 44 min |
| May 24, 10:16 AM MDT | Severe Thunderstorm Warning | BOU | Elbert | 44 min |
| May 24, 10:59 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 46 min |
| May 24, 1:03 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 42 min |
| May 24, 1:34 PM MDT | Tornado Warning | BOU | Arapahoe | 26 min |
| May 24, 1:55 PM MDT | Tornado Warning | BOU | Adams | 35 min |
| May 24, 2:16 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 49 min |
| May 24, 2:37 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 38 min |
| May 24, 3:07 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 38 min |
| May 24, 3:15 PM MDT | Tornado Warning | BOU | Lincoln | 30 min |
| May 24, 3:44 PM MDT | Tornado Warning | BOU | Lincoln | 31 min |
| May 24, 4:18 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 27 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.