Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 97, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 22, 1998, 8:40 PM MDT for Washington County, Colorado. It was in force for 50 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 22, 1998, 8:40 PM MDT (02:40 UTC)
- Expired
- Jun 22, 1998, 9:30 PM MDT
- In force
- 50 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), 134 km from the middle of the area, began a volume at 02:42 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 22, 7:45 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 2.7 hours before the alert went out and 47 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
- 411 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 2892 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
007
WUUS1 KDEN 230242 RRA
SVRDEN
COC121-230330-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
840 PM MDT MON JUN 22 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN WASHINGTON COUNTY IN NORTHEAST COLORADO
* UNTIL 930 PM MDT
* AT 840 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 15 MILES WEST OF BURDETT...OR ABOUT 8 MILES
NORTH OF AKRON...MOVING EAST AT 15 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...BURDETT
HAIL UP TO 1.5 INCHES IN DIAMETER IS POSSIBLE WITH THIS SEVERE
THUNDERSTORM. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCED WARNING. MOVE INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
LAT...LON 4033 10328 4021 10328 4018 10287 4039 10287
BARJENBRUCHWhat 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 22, 4:45 PM MDT, 3 hours 55 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 445 PM MDT MON JUN 22 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: THE FIRST THUNDERSTORM OF THE DAY HAS CREATED A WIND SHIFT LINE ACROSS THE DENVER METRO AREA. THIS HAS LESSENED THE CHANCE OF SEVERE WEATHER FARTHER NORTH IN THE GREELEY AND FORT COLLINS AREA. THE MAIN AREA FOR THUNDERSTORM DEVELOPMENT FOR THE REST OF THE AFTERNOON WILL BE IN THE AREA BETWEEN DENVER AND LAST CHANCE. FARTHER EAST...THE AIRMASS REMAINS MOIST AND UNSTABLE. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED THIS EVENING FROM LAST CHANCE AND NEW RAYMER EAST. HAIL IN THE ONE TO TWO INCH DIAMETER RANGE WILL BE THE MAIN FEATURE OF STORMS THIS EVENING...BUT DAMAGING WINDS...TORNADOES...AND HEAVY RAIN ARE ALSO POSSIBLE. AMATEUR RADIO SPOTTERS HAVE BEEN ACTIVATED IN THE DENVER AREA. YOU CAN REPORT SEVEVRE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICIALS WHO WILL RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE. GIMMESTAD
Special weather statement, Jun 22, 4:45 PM MDT, 3 hours 55 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 445 PM MDT MON JUN 22 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: THE FIRST THUNDERSTORM OF THE DAY HAS CREATED A WIND SHIFT LINE ACROSS THE DENVER METRO AREA. THIS HAS LESSENED THE CHANCE OF SEVERE WEATHER FARTHER NORTH IN THE GREELEY AND FORT COLLINS AREA. THE MAIN AREA FOR THUNDERSTORM DEVELOPMENT FOR THE REST OF THE AFTERNOON WILL BE IN THE AREA BETWEEN DENVER AND LAST CHANCE. FARTHER EAST...THE AIRMASS REMAINS MOIST AND UNSTABLE. ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED THIS EVENING FROM LAST CHANCE AND NEW RAYMER EAST. HAIL IN THE ONE TO TWO INCH DIAMETER RANGE WILL BE THE MAIN FEATURE OF STORMS THIS EVENING...BUT DAMAGING WINDS...TORNADOES...AND HEAVY RAIN ARE ALSO POSSIBLE. AMATEUR RADIO SPOTTERS HAVE BEEN ACTIVATED IN THE DENVER AREA. YOU CAN REPORT SEVEVRE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICIALS WHO WILL RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE. GIMMESTAD
Local storm report, Jun 22, 8:15 PM MDT, 25 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
815 PM MDT MON JUN 22 1998
...PRELIMINARY STORM REPORT FOR JUNE 22 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0414 PM 2 N LOCHBOUIE CO 0.75 INCH HAIL
06/22/98 WELD
0522 PM 11 E PROSPECT VALLEY CO 0.75 INCH HAIL
06/22/98 WELD
0651 PM 11 S FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0727 PM WIGGINS CO 76 MPH TSTM WIND GUST
06/22/98 MORGAN MEASURED BY SPOTTER
0730 PM 15 SE FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0756 PM 3 N PROSPECT VALLEY CO 1.50 INCH HAIL
06/22/98 WELD MOSTLY SMALL STONESLocal storm report, Jun 22, 8:15 PM MDT, 25 minutes before
LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
815 PM MDT MON JUN 22 1998
CORRECTED WIND SPEED IN 0727 PM REPORT
...PRELIMINARY STORM REPORT FOR JUNE 22 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0414 PM 2 N LOCHBOUIE CO 0.75 INCH HAIL
06/22/98 WELD
0522 PM 11 E PROSPECT VALLEY CO 0.75 INCH HAIL
06/22/98 WELD
0651 PM 11 S FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0727 PM WIGGINS CO 67 MPH TSTM WIND GUST
06/22/98 MORGAN MEASURED BY SPOTTER
0730 PM 15 SE FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0756 PM 3 N PROSPECT VALLEY CO 1.50 INCH HAIL
06/22/98 WELD MOSTLY SMALL STONESLocal storm report, Jun 22, 8:15 PM MDT, 25 minutes before
LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
815 PM MDT MON JUN 22 1998
CORRECTED WIND SPEED IN 0727 PM REPORT
...PRELIMINARY STORM REPORT FOR JUNE 22 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0414 PM 2 N LOCHBOUIE CO 0.75 INCH HAIL
06/22/98 WELD
0522 PM 11 E PROSPECT VALLEY CO 0.75 INCH HAIL
06/22/98 WELD
0651 PM 11 S FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0727 PM WIGGINS CO 67 MPH TSTM WIND GUST
06/22/98 MORGAN MEASURED BY SPOTTER
0730 PM 15 SE FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0756 PM 3 N PROSPECT VALLEY CO 1.50 INCH HAIL
06/22/98 WELD MOSTLY SMALL STONESLocal storm report, Jun 22, 8:15 PM MDT, 25 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
815 PM MDT MON JUN 22 1998
...PRELIMINARY STORM REPORT FOR JUNE 22 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0414 PM 2 N LOCHBOUIE CO 0.75 INCH HAIL
06/22/98 WELD
0522 PM 11 E PROSPECT VALLEY CO 0.75 INCH HAIL
06/22/98 WELD
0651 PM 11 S FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0727 PM WIGGINS CO 76 MPH TSTM WIND GUST
06/22/98 MORGAN MEASURED BY SPOTTER
0730 PM 15 SE FORT MORGAN CO 0.75 INCH HAIL
06/22/98 MORGAN
0756 PM 3 N PROSPECT VALLEY CO 1.50 INCH HAIL
06/22/98 WELD MOSTLY SMALL STONESThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 6:12 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 48 min |
| Jun 22, 7:00 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 45 min |
| Jun 22, 9:11 PM MDT | Tornado Warning | BOU | Washington | 34 min |
| Jun 22, 10:47 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 43 min |
| Jun 22, 11:27 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Jun 22, 11:31 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 44 min |
| Jun 23, 12:14 AM MDT | Severe Thunderstorm Warning | BOU | Morgan | 46 min |
| Jun 23, 12:58 AM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 47 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.