Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 68, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 7, 1998, 3:53 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 52 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
- Jun 7, 1998, 3:53 PM MDT (21:53 UTC)
- Expired
- Jun 7, 1998, 4:45 PM MDT
- In force
- 52 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Elbert County, CO, Lincoln County, CO
The radar
The Pueblo radar (KPUX), 79 km from the middle of the area, began a volume at 21:56 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 |
|---|---|---|---|
| Jun 7, 4:25 PM MDT | Hail 1 | Hugo, 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 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, 9.9 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
- 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.
107
WUUS1 KDEN 072154 RRA
SVRDEN
COC039-073-072245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
353 PM MDT SUN JUN 7 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN ELBERT COUNTY IN EAST CENTRAL COLORADO
CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO
* UNTIL 445 PM MDT
* AT 350 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 19 MILES SOUTHWEST OF HUGO...OR ABOUT 18
MILES SOUTH OF LIMON...MOVING NORTHEAST AT 25 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...HUGO
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 3904 10395 3891 10379 3906 10328 3927 10352
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 23 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 23 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, 48 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, 48 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, 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, 4:24 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Washington | 51 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.