Alert archive / Colorado / Flash Flood Warnings in 1998
Flash Flood Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jun 22, 1998, 11:27 PM MDT for Weld County, Colorado. It was in force for 3 hr. 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, 11:27 PM MDT (05:27 UTC)
- Expired
- Jun 23, 1998, 2:00 AM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Weld County, CO
The radar
The Denver radar (KFTG), 57 km from the middle of the area, began a volume at 05:29 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 nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 5.5 hours before the alert went out and 107 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.
000
TTAA00 KDEN 230526
FFWDEN
COC123-230800-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1127 PM MDT MON JUN 22 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN WELD COUNTY IN NORTHEAST COLORADO
* UNTIL 2 AM MDT
* AT 1125 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED VERY HEAVY RAIN IN AN AREA BETWEEN RIVERSIDE RESERVOIR...
HARDIN...AND ROGGEN.
* LOCATIONS IN THE WARNING INCLUDE...RIVERSIDE RESERVOIR AND MASTERS
RADAR INDICATED AS MUCH AS 4 INCHES OF RAIN HAS ALREADY FALLEN IN
THIS AREA. ANOTHER 1 TO 2 INCHES MAY FALL BEFORE THE STORMS MOVE
OUT OF THE AREA.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.
LAT...LON 4022 10454 4022 10432 4035 10415 4040 10425
BARJENBRUCHWhat forecasters said that day
The local office's own words before this flash flood 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, 3 hours 12 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, 3 hours 12 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, 3 hours 12 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, 3 hours 12 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, 1 hour 17 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, 11:31 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
Flash Flood Warnings in Colorado, 1998Every flash flood 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.