Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 5, 1998, 3:26 PM MDT for Weld County, Colorado. It was in force for 64 min. 1 report came from 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, with what was reported inside it.
The facts
- Issued
- May 5, 1998, 3:26 PM MDT (21:26 UTC)
- Expired
- May 5, 1998, 4:30 PM MDT
- In force
- 64 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 21:26 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 |
|---|---|---|---|
| May 5, 3:45 PM MDT | Hail 1 | Evans, 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, 9.4 hours before the alert went out and 143 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
- 890 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 052126 RRA
SVRDEN
COC123-052230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
326 PM MDT TUE MAY 5 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL WELD COUNTY IN NORTHEAST COLORADO
* UNTIL 430 PM MDT
* AT 322 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 3 MILES NORTHWEST OF LA SALLE...OR ABOUT 4
MILES SOUTHWEST OF GREELEY...MOVING NORTHEAST AT 15 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE GREELEY...AULT...BARNESVILLE...
EATON...EVANS...GALETON...GILL...LA SALLE...LUCERNE...PURCELL AND
WINDSOR
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.
LESZCYNSKI
LAT...LON 4041 10495 4027 10470 4056 10441 4068 10462What 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 5, 10:45 AM MDT, 4 hours 41 minutes before
COZ030-032>050-060600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT TUE MAY 5 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: SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ALONG THE FOOTHILLS AND ALONG THE PALMER DIVIDE. MOIST SOUTHERLY FLOW COMBINED WITH AN UNSTABLE ATMOSPHERE WILL LEAD TO THE DEVELOPMENT OF THESE STORMS. THE STORMS WILL EVENTUALLY SPREAD EASTWARD ONTO THE PLAINS LATE IN THE AFTERNOON AND EVENING. A FEW OF THE STORMS MAY REACH SEVERE LEVELS FOR BRIEF PERIODS OF TIME BY PRODUCING HAIL UP TO 1 INCH IN DIAMETER. SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY DUE TO THE LIMITED COVERAGE AND BRIEF NATURE OF ANY SEVERE THUNDERSTORMS. HOWEVER ANY REPORTS OF SIGNIFICANT WEATHER WOULD BE APPRECIATED. HERRALD
Local storm report, May 5, 10:57 AM MDT, 4 hours 29 minutes before
LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
1057 AM MDT TUE MAY 5 1998
...PRELIMINARY STORM REPORT FOR MAY 04 1998...
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0256 PM 7SW CARR CO 0.75 INCH HAIL
05/04/98 WELD
0700 PM HONHOLTZ RANCH CO 1.00 INCH HAIL
05/04/98 LARIMER
BENTONLocal storm report, May 5, 10:57 AM MDT, 4 hours 29 minutes before
LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
1057 AM MDT TUE MAY 5 1998
...PRELIMINARY STORM REPORT FOR MAY 04 1998...
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0256 PM 7SW CARR CO 0.75 INCH HAIL
05/04/98 WELD
0700 PM HONHOLTZ RANCH CO 1.00 INCH HAIL
05/04/98 LARIMER
FREDINSpecial weather statement, May 5, 2:50 PM MDT, 36 minutes before
COZ044-045-049-052145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 250 PM MDT TUE MAY 5 1998 AT 235 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS OVER EASTERN ADAMS...WEST CENTRAL WASHINGTON...EXTREME NORTHEASTERN ARAPAHOE AND SOUTHEASTERN MORGAN COUNTIES. THE STRONGEST STORM WAS 4 MILES SOUTHEAST OF WOODROW...OR ABOUT 25 MILES SOUTHWEST OF AKRON...MOVING NORTHEAST AT 15 MILES PER HOUR. HEAVY RAIN WAS OCCURRING WITH THESE STORMS. DOPPLER RADAR INDICATED UP TO AN INCH AND A HALF OF RAIN HAD FALLEN IN AN HOURS TIME OVER WEST CENTRAL WASHINGTON COUNTY...JUST WEST OF WOODROW. LOCALIZED FLOODING OF SMALL STREAMS AND ROADWAYS IS POSSIBLE...ESPECIALLY IN WEST CENTRAL WASHINGTON COUNTY. PERSONS IN OR NEAR GARY...LAST CHANCE...SHAMROCK...WOODLIN SCHOOL AND WOODROW SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. LESZCYNSKI
Special weather statement, May 5, 2:50 PM MDT, 36 minutes before
COZ044-045-049-052145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 250 PM MDT TUE MAY 5 1998 AT 235 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS OVER EASTERN ADAMS...WEST CENTRAL WASHINGTON...EXTREME NORTHEASTERN ARAPAHOE AND SOUTHEASTERN MORGAN COUNTIES. THE STRONGEST STORM WAS 4 MILES SOUTHEAST OF WOODROW...OR ABOUT 25 MILES SOUTHWEST OF AKRON...MOVING NORTHEAST AT 15 MILES PER HOUR. HEAVY RAIN WAS OCCURRING WITH THESE STORMS. DOPPLER RADAR INDICATED UP TO AN INCH AND A HALF OF RAIN HAD FALLEN IN AN HOURS TIME OVER WEST CENTRAL WASHINGTON COUNTY...JUST WEST OF WOODROW. LOCALIZED FLOODING OF SMALL STREAMS AND ROADWAYS IS POSSIBLE...ESPECIALLY IN WEST CENTRAL WASHINGTON COUNTY. PERSONS IN OR NEAR GARY...LAST CHANCE...SHAMROCK...WOODLIN SCHOOL AND WOODROW SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. LESZCYNSKI
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 3:55 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 50 min |
| May 5, 4:14 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 31 min |
| May 5, 4:27 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 33 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.