Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 15, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 2, 1997, 12:16 AM MDT for Logan County, Washington County, Colorado. It was in force for 44 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 2, 1997, 12:16 AM MDT (06:16 UTC)
- Expired
- Jun 2, 1997, 1:00 AM MDT
- In force
- 44 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), 142 km from the middle of the area, began a volume at 06:19 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, 6.3 hours before the alert went out and 58 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
- 1114 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 2528 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 020618 RRA
SVRDEN
COC075-121-020700-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1216 AM MDT MON JUN 2 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 100 AM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHEASTERN WASHINGTON AND SOUTH CENTRAL LOGAN
INCLUDING THE FOLLOWING LOCATIONS
BURDETT...OTIS...PLATNER AND PREWITT RESERVOIR
AT 1213 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 2 MILES SOUTH OF PREWITT RESERVOIR...OR ABOUT 18
MILES NORTHWEST OF AKRON.
THE STORM WAS MOVING EAST AT 20 MILES PER HOUR.
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.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
LAT...LON 4044 10284 4008 10298 4041 10346 4051 10323
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 1, 8:06 PM MDT, 4 hours 10 minutes before
COZ048-050-020300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 804 PM MDT SUN JUN 1 1997 ...THUNDERSTORMS HAVE YET TO MOVE INTO LOGAN AND SEDGWICK COUNTIES... AT 758 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS JUST NORTH OF THE COLORADO LINE IN SOUTHWEST NEBRASKA. THESE STORMS WERE MOVING EAST AT 25 MPH. AT THEIR PRESENT SPEED AND DIRECTION MOST OF THESE THUNDERSTORMS SHOULD PASS JUST NORTH OF LOGAN COUNTY...CLIPPING NORTHERN PORTIONS OF SEDGWICK COUNTY BETWEEN 8:15 PM AMD 9:30 PM MDT. PERSONS IN SEDGWICK AND NORTHEAST LOGAN COUNTIES SHOULD REMAIN ALERT FOR THE POSSIBILITY OF SEVERE WEATHER...INCLUDING TORNADOES...HAIL AT LEAST 3/4 INCH IN DIAMETER...WIND GUSTS TO AT LEAST 60 MPH AND HEAVY RAIN. A TORNADO WATCH REMAINS IN EFFECT FOR MOST OF NORTHEAST COLORADO UNTIL 11 PM MDT. TORNADOES ARE POSSIBLE...ALONG WITH LARGE HAIL AND DAMAGING THUNDERSTORM WINDS IvN AND NEAR THE WATCH AREA. CONTINUE TO MONITOR NOAA WEATHER RADIO...LOCAL NEWS OUTLETS AND THE WEATHER CHANNEL FOR THE LATEST SEVERE WEATHER WATCHES AND WARNINGS. BAKER
Local storm report, Jun 1, 8:27 PM MDT, 3 hours 49 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
800 PM MDT SUN JUN 01 1997
...PRELIMINARY STORM REPORT FOR JUNE 01 1997...
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM 6 S MERNIO CO 0.75 INCH HALI
06/01/97 LOGAN
RAYSpecial weather statement, Jun 1, 9:20 PM MDT, 2 hours 56 minutes before
COZ038-040>46-048>050-020500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 920 PM MDT SUN JUN 1 1997 ...TORNADO WATCH CANCELLED FOR NORTHEASTERN COLORADO... THE TORNADO WATCH HAS BEEN CANCELLED FOR NORTHEASTERN COLORADO. SCATTERED THUNDERSTORMS STILL EXIST OVER THE AREA...HOWEVER NO SIGNIFICANT TORNADIC STORMS ARE EXPECTED. HAIL...HEAVY RAIN AND STRONG GUSTY WINDS ARE STILL POSSIBLE WITH THESE STORMS. ENTREKIN
Special weather statement, Jun 1, 9:26 PM MDT, 2 hours 50 minutes before
COZ038-040>46-048>050-020500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 920 PM MDT SUN JUN 1 1997 ...TORNADO WATCH CANCELLED FOR NORTHEASTERN COLORADO... THE TORNADO WATCH HAS BEEN CANCELLED FOR NORTHEASTERN COLORADO. SCATTERED THUNDERSTORMS STILL EXIST OVER THE AREA...HOWEVER NO SIGNIFICANT TORNADIC STORMS ARE EXPECTED. HAIL...HEAVY RAIN AND STRONG GUSTY WINDS ARE STILL POSSIBLE WITH THESE STORMS. ENTREKIN J
Special weather statement, Jun 1, 10:20 PM MDT, 1 hour 56 minutes before
COZ047-020500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1010PM MDT SUN JUN 1 1997 ...THUNDERSTORM MOVING THROUGH SOUTHERN LINCOLN COUNTY... A STRONG THUNDERSTORM WAS SHOWN BY DOPPLER RADAR AT 1008PM MOVING THROUGH SOUTHERN LINCOLN COUNTY. THE LARGE STORM WAS CENTERED 10 MILES SOUTHWEST OF BOYERO...AND WAS MOVING EAST AT 30 MPH. SEVERAL FUNNEL CLOUDS WERE REPORTED WITH THIS STORM SINCE 945PM IN SOUTH CENTRAL LINCOLN COUNTY. RESIDENTS OF LINCOLN COUNTY SHOULD TAKE COVER FROM THIS STORM AND REPORT ANY SEVERE WEATHER TO YOUR COUNTY SHERIFF. RTG
Special weather statement, Jun 1, 10:23 PM MDT, 1 hour 53 minutes before
COZ047-020500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1010PM MDT SUN JUN 1 1997 ...THUNDERSTORM MOVING THROUGH SOUTHERN LINCOLN COUNTY... A STRONG THUNDERSTORM WAS SHOWN BY DOPPLER RADAR AT 1008PM MOVING THROUGH SOUTHERN LINCOLN COUNTY. THE LARGE STORM WAS CENTERED 10 MILES SOUTHWEST OF BOYERO...AND WAS MOVING EAST AT 30 MPH. SEVERAL FUNNEL CLOUDS WERE REPORTED WITH THIS STORM SINCE 945PM IN SOUTH CENTRAL LINCOLN COUNTY. RESIDENTS OF LINCOLN COUNTY SHOULD TAKE COVER FROM THIS STORM AND REPORT ANY SEVERE WEATHER TO YOUR COUNTY SHERIFF. RTG
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 2:10 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 35 min |
| Jun 2, 3:30 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
| Jun 2, 3:56 PM MDT | Tornado Warning | BOU | Weld | 34 min |
| Jun 2, 4:35 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 40 min |
| Jun 2, 4:55 PM MDT | Tornado Warning | BOU | Weld | 35 min |
| Jun 2, 5:18 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 42 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1997Every severe thunderstorm warning in 1997
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.