Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 71, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 7, 1998, 4:24 PM MDT for Logan County, Washington County, Colorado. It was in force for 51 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
- Jun 7, 1998, 4:24 PM MDT (22:24 UTC)
- Expired
- Jun 7, 1998, 5:15 PM MDT
- In force
- 51 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Logan County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 148 km from the middle of the area, began a volume at 22:26 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 7, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.4 hours before the alert went out and 64 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
- 1477 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
344
WUUS1 KDEN 072225 RRA
SVRDEN
COC075-121-072315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
424 PM MDT SUN JUN 7 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN LOGAN COUNTY IN NORTHEAST COLORADO
NORTHEASTERN WASHINGTON COUNTY IN NORTHEAST COLORADO
* UNTIL 515 PM MDT
* AT 420 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 6 MILES WEST OF BURDETT...OR ABOUT 16 MILES
NORTHEAST OF AKRON...MOVING NORTHEAST AT 40 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...BURDETT...LONE STAR AND ST
PETERSBURG
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR
EASTERN COLORADO.
LAT...LON 4039 10322 4022 10306 4030 10287 4060 10269
4064 10306
COOPERWhat 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, Jun 7, 11:30 AM MDT, 4 hours 54 minutes before
COZ030-032>050-080600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1130 AM MDT SUN JUN 7 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: SEVERAL WEATHER ELEMENTS APPEAR TO BE COMING TOGETHER OVER NORTHEAST COLORADO THIS AFTERNOON WHICH MAY LEAD TO THE DEVELOPMENT OF STRONG THUNDERSTORMS LATE IN THE AFTERNOON AND EVENING. AN UPPER LEVEL WEATHER DISTURBANCE IS APPROACHING COLORADO FROM THE SOUTHWEST WHILE A SURFACE LOW PRESSURE AREA IS DEVELOPING OVER NORTHERN COLORADO LATE THIS MORNING. STRENGTHENING SOUTHERLY WINDS ON THE PLAINS WILL BRING ADDITIONAL LOW LEVEL MOISTURE INTO THE AREA THROUGH THE AFTERNOON. A ROUND OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP OVER THE FOOTHILLS DURING THE EARLY AFTERNOON AND THEN MOVE EASTWARD ONTO THE PLAINS. AS THUNDERSTORMS MOVE OVER LOWER ELEVATIONS...THEY WILL ENCOUNTER DEEPER MOISTURE AND WIND FIELDS FAVORABLE FOR THE DEVELOPMENT OF LONG-LIVED STORMS. SOME SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP WITH LARGE HAIL AND DAMAGING WINDS. A FEW TORNADOES MAY ALSO BE POSSIBLE. THE BEST POSSIBILITIES FOR STRONG THUNDERSTORMS APPEARS TO BE EAST AND NORTHEAST OF THE DENVER AREA THROUGH THE EVENING. HOWEVER...STORMS THAT DEVELOP CLOSER TO THE FOOTHILLS MAY ALSO BRIEFLY PRODUCE SOME HAIL...GUSTY WINDS AND HEAVY RAINS. SPOTTER ACTIVATION WILL BE NECESSARY AFTER 3 PM AND THROUGH TH IS EVENING. DANKERS
Special weather statement, Jun 7, 11:30 AM MDT, 4 hours 54 minutes before
COZ030-032>050-080600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1130 AM MDT SUN JUN 7 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: SEVERAL WEATHER ELEMENTS APPEAR TO BE COMING TOGETHER OVER NORTHEAST COLORADO THIS AFTERNOON WHICH MAY LEAD TO THE DEVELOPMENT OF STRONG THUNDERSTORMS LATE IN THE AFTERNOON AND EVENING. AN UPPER LEVEL WEATHER DISTURBANCE IS APPROACHING COLORADO FROM THE SOUTHWEST WHILE A SURFACE LOW PRESSURE AREA IS DEVELOPING OVER NORTHERN COLORADO LATE THIS MORNING. STRENGTHENING SOUTHERLY WINDS ON THE PLAINS WILL BRING ADDITIONAL LOW LEVEL MOISTURE INTO THE AREA THROUGH THE AFTERNOON. A ROUND OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP OVER THE FOOTHILLS DURING THE EARLY AFTERNOON AND THEN MOVE EASTWARD ONTO THE PLAINS. AS THUNDERSTORMS MOVE OVER LOWER ELEVATIONS...THEY WILL ENCOUNTER DEEPER MOISTURE AND WIND FIELDS FAVORABLE FOR THE DEVELOPMENT OF LONG-LIVED STORMS. SOME SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP WITH LARGE HAIL AND DAMAGING WINDS. A FEW TORNADOES MAY ALSO BE POSSIBLE. THE BEST POSSIBILITIES FOR STRONG THUNDERSTORMS APPEARS TO BE EAST AND NORTHEAST OF THE DENVER AREA THROUGH THE EVENING. HOWEVER...STORMS THAT DEVELOP CLOSER TO THE FOOTHILLS MAY ALSO BRIEFLY PRODUCE SOME HAIL...GUSTY WINDS AND HEAVY RAINS. SPOTTER ACTIVATION WILL BE NECESSARY AFTER 3 PM AND THROUGH TH IS EVENING. DANKERS
Special weather statement, Jun 7, 3:05 PM MDT, 1 hour 19 minutes before
COZ030-032>050-080600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 305 PM MDT SUN JUN 7 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: A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE NORTHEAST COLORADO PLAINS UNTIL 8 PM THIS EVENING. AT ABOUT 130 PM...A LINE OF SHOWERS AND THUNDERSTORMS HAD DEVELOPED FROM WESTERN ARAPAHOE COUNTY THROUGH CENTRAL AND NORTHERN MORGAN COUNTY. THESE STORMS PRODUCED MAINLY RAIN. CONDITIONS ACROSS NORTHEAST COLORADO REMAIN FAVORABLE FOR STRONG TO SEVERE THUNDERSTORM DEVELOPMENT. STRONG WINDS ALOFT MAY HELP PRODUCE DAMAGING WINDS FROM THUNDERSTORM OUTFLOWS. LOCATIONS ALONG THE I-25 CORRIDOR AND INTO WELD COUNTY WILL FACE THE GREATEST THREAT OF DAMAGE FROM GUSTY WINDS. AREAS EAST OF A LINE FROM BYERS TO FORT MORGAN TO STERLING WILL CONTINUE TO HAVE THE THREAT OF LARGE HAIL FROM THUNDERSTORMS THAT DEVELOP. A FEW TORNADOES ARE ALSO STILL POSSIBLE FROM THESE STORMS. STORMS THAT HAVE DEVELOPED SO FAR THIS AFTERNOON HAVE BEEN MOVING NORTHEASTWARD AT ABOUT 20 MPH. SPOTTERS HAVE BEEN ACTIVATED TO MONITOR STORM DEVELOPMENT. DANKERS
Special weather statement, Jun 7, 3:05 PM MDT, 1 hour 19 minutes before
COZ030-032>050-080600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 305 PM MDT SUN JUN 7 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: A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE NORTHEAST COLORADO PLAINS UNTIL 8 PM THIS EVENING. AT ABOUT 130 PM...A LINE OF SHOWERS AND THUNDERSTORMS HAD DEVELOPED FROM WESTERN ARAPAHOE COUNTY THROUGH CENTRAL AND NORTHERN MORGAN COUNTY. THESE STORMS PRODUCED MAINLY RAIN. CONDITIONS ACROSS NORTHEAST COLORADO REMAIN FAVORABLE FOR STRONG TO SEVERE THUNDERSTORM DEVELOPMENT. STRONG WINDS ALOFT MAY HELP PRODUCE DAMAGING WINDS FROM THUNDERSTORM OUTFLOWS. LOCATIONS ALONG THE I-25 CORRIDOR AND INTO WELD COUNTY WILL FACE THE GREATEST THREAT OF DAMAGE FROM GUSTY WINDS. AREAS EAST OF A LINE FROM BYERS TO FORT MORGAN TO STERLING WILL CONTINUE TO HAVE THE THREAT OF LARGE HAIL FROM THUNDERSTORMS THAT DEVELOP. A FEW TORNADOES ARE ALSO STILL POSSIBLE FROM THESE STORMS. STORMS THAT HAVE DEVELOPED SO FAR THIS AFTERNOON HAVE BEEN MOVING NORTHEASTWARD AT ABOUT 20 MPH. SPOTTERS HAVE BEEN ACTIVATED TO MONITOR STORM DEVELOPMENT. DANKERS
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 3:14 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 46 min |
| Jun 7, 3:53 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 52 min |
| Jun 7, 4:04 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 41 min |
| Jun 7, 4:20 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 40 min |
| Jun 7, 4:41 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Sedgwick | 49 min |
| Jun 7, 4:45 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 30 min |
| Jun 7, 5:28 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 32 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.