Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 101, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 23, 1998, 12:58 AM MDT for Morgan County, Washington County, Colorado. It was in force for 47 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 23, 1998, 12:58 AM MDT (06:58 UTC)
- Expired
- Jun 23, 1998, 1:45 AM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Morgan County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 106 km from the middle of the area, began a volume at 06:58 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, 7.0 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
- 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.
211
WUUS1 KDEN 230700 RRA
SVRDEN
COC087-121-230745-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1258 AM MDT TUE JUN 23 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN MORGAN COUNTY IN NORTHEAST COLORADO
NORTHWESTERN WASHINGTON COUNTY IN NORTHEAST COLORADO
* UNTIL 145 AM MDT
* AT 1257 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 5 MILES SOUTH OF ANTELOPE SPRINGS...OR ABOUT 9
MILES NORTHEAST OF FORT MORGAN...MOVING EAST AT 25 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...HILLROSE...PREWITT RESERVOIR
AND SNYDER
THIS STORM PRODUCED GOLFBALL SIZED HAIL 2 MILES NORTH OF FORT MORGAN.
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 TORRENTIAL RAIN.
LAT...LON 4046 10382 4029 10380 4025 10329 4043 10325
4043 10346
&
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
Local storm report, Jun 22, 8:15 PM MDT, 4 hours 43 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, 4 hours 43 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, 4 hours 43 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, 4 hours 43 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, 10:10 PM MDT, 2 hours 48 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
1010 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 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 STONES
0936 PM OTIS CO 1.75 INCH HAIL
06/22/98 WASHINGTONThe 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, 8:40 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 50 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 |
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.