Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 60, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 26, 1998, 4:30 PM MDT for Larimer County, Weld County, Colorado. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- May 26, 1998, 4:30 PM MDT (22:30 UTC)
- Expired
- May 26, 1998, 5:05 PM MDT
- In force
- 35 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Larimer County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 41 km from the middle of the area, began a volume at 22:36 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 26, 2:45 PM MDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.5 hours before the alert went out and 166 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1671 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
045
WUUS1 KDEN 262233 RRA
SVRDEN
COC069-123-262305-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
430 PM MDT TUE MAY 26 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EXTREME NORTHEASTERN LARIMER COUNTY IN NORTH CENTRAL COLORADO
NORTHWESTERN WELD COUNTY IN NORTHEAST COLORADO
* UNTIL 505 PM MDT
* AT 427 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 8 MILES NORTH OF WELLINGTON...OR ABOUT 17 MILES
NORTH OF FORT COLLINS...MOVING NORTH AT 15 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...AULT...CARR...HEREFORD...NATURAL
FORT REST AREA...NUNN...PIERCE...PURCELL...ROCKPORT...SEVERANCE AND
WELLINGTON
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN
COLORADO.
HAIL UP TO 1 1/2 INCH IN DIAMETER IS POSSIBLE WITH THIS SEVERE
THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A
GARAGE AND MOVE TO A SUBSTANTIAL SHELTER.
LAT...LON 4080 10510 4048 10491 4066 10428 4099 10421
4098 10506What 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 26, 2:51 PM MDT, 1 hour 39 minutes before
COZ041-046-262235- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 251 PM MDT TUE MAY 26 1998 ...STRONG THUNDERSTORMS TO MOVE INTO SOUTHERN ELBERT COUNTY IN THE NEXT 30 MINUTES... AT 340 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A LINE OF STRONG TO SEVERE THUNDERSTORMS OVER NORTHERN EL PASO COUNTY IN EAST CENTRAL COLORADO. THESE STORMS WERE MOVING NORTHEAST AT 30 MPH. PERSONS IN OR NEAR ELBERT...SIMLA...MATHESON...KIOWA AND ELIZABETH SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND BE PREPARED TO MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. VERY LARGE HAIL...DEADLY LIGHTNING...AND TORNADOES ARE POSSIBLE WITH THESE STORMS. A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PORTION OF NORTHEASTERN COLORADO UNTIL 8 PM MDT. BAKER
Special weather statement, May 26, 3:53 PM MDT, 37 minutes before
COZ041-046-262235- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 251 PM MDT TUE MAY 26 1998 ...STRONG THUNDERSTORMS TO MOVE INTO SOUTHERN ELBERT COUNTY IN THE NEXT 30 MINUTES... AT 340 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A LINE OF STRONG TO SEVERE THUNDERSTORMS OVER NORTHERN EL PASO COUNTY IN EAST CENTRAL COLORADO. THESE STORMS WERE MOVING NORTHEAST AT 30 MPH. PERSONS IN OR NEAR ELBERT...SIMLA...MATHESON...KIOWA AND ELIZABETH SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND BE PREPARED TO MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. VERY LARGE HAIL...DEADLY LIGHTNING...AND TORNADOES ARE POSSIBLE WITH THESE STORMS. A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PORTION OF NORTHEASTERN COLORADO UNTIL 8 PM MDT. BAKER
Special weather statement, May 26, 4:20 PM MDT, 10 minutes before
COZ038-043-262300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 420 PM MDT TUE MAY 26 1998 ...DOPPLER RADAR INDICATING WEAK CIRCULATION WITHIN STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY IN NORTHEAST COLORADO... AT 418 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY. THE STRONGEST STORM WAS LOCATED 3 MILES WEST OF EATON...OR ABOUT 6 MILES NORTH OF GREELEY...MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AULT...EATON...LUCERNE...NUNN...PIERCE... PURCELL...SEVERANCE AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN COLORADO. BAKER
Special weather statement, May 26, 4:20 PM MDT, 10 minutes before
COZ038-043-262300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 420 PM MDT TUE MAY 26 1998 ...DOPPLER RADAR INDICATING WEAK CIRCULATION WITHIN STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY IN NORTHEAST COLORADO... AT 418 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY. THE STRONGEST STORM WAS LOCATED 3 MILES WEST OF EATON...OR ABOUT 6 MILES NORTH OF GREELEY...MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AULT...EATON...LUCERNE...NUNN...PIERCE... PURCELL...SEVERANCE AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN COLORADO. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM MDT FOR EASTERN COLORADO. BAKER
Special weather statement, May 26, 4:20 PM MDT, 10 minutes before
COZ038-043-262300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 420 PM MDT TUE MAY 26 1998 ...DOPPLER RADAR INDICATING WEAK CIRCULATION WITHIN STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY IN NORTHEAST COLORADO... AT 418 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY. THE STRONGEST STORM WAS LOCATED 3 MILES WEST OF EATON...OR ABOUT 6 MILES NORTH OF GREELEY...MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AULT...EATON...LUCERNE...NUNN...PIERCE... PURCELL...SEVERANCE AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN COLORADO. BAKER
Special weather statement, May 26, 4:20 PM MDT, 10 minutes before
COZ038-043-262300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 420 PM MDT TUE MAY 26 1998 ...DOPPLER RADAR INDICATING WEAK CIRCULATION WITHIN STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY IN NORTHEAST COLORADO... AT 418 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER NORTHWEST WELD COUNTY. THE STRONGEST STORM WAS LOCATED 3 MILES WEST OF EATON...OR ABOUT 6 MILES NORTH OF GREELEY...MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AULT...EATON...LUCERNE...NUNN...PIERCE... PURCELL...SEVERANCE AND WINDSOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN COLORADO. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM MDT FOR EASTERN COLORADO. BAKER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 4:58 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Washington | 32 min |
| May 26, 5:03 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 3 hr |
| May 26, 5:30 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 40 min |
| May 26, 5:58 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 57 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.