Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 33, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 12, 1997, 3:37 PM MDT for Adams County, Weld County, Colorado. It was in force for 38 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 12, 1997, 3:37 PM MDT (21:37 UTC)
- Expired
- Jun 12, 1997, 4:15 PM MDT
- In force
- 38 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Adams County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 31 km from the middle of the area, began a volume at 21:39 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 12, 12:30 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.6 hours before the alert went out and 123 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
- 48 J/kg
- Mixed-layer CIN
- -253 J/kg
- Mixed-layer LCL
- 1774 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 122136 RRA
SVRDEN
COC001-123-122215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
337 PM MDT THU JUN 12 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHWESTERN ADAMS AND SOUTHWESTERN WELD
INCLUDING THE FOLLOWING LOCATIONS
BARR LAKE...BRIGHTON...FORT LUPTON...HUDSON...KEENESBURG AND
LOCHBUIE
AT 327 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER BARR LAKE...OR ABOUT 17 MILES NORTHEAST OF
DENVER. THIS STORM HAS PRODUCED LARGE HAIL.
THE STORM WAS MOVING NORTHEAST AT 10 TO 15 MILES PER HOUR.
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN
A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A
TORNADO IS SPOTTED.
A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF EASTERN COLORADO UNTIL
600 PM MDT.
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 4009 10443 3990 10479 3994 10485 4022 10479
GARD...WSFO DENVERWhat 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 12, 11:55 AM MDT, 3 hours 42 minutes before
COZ041-121830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1155 AM MDT THU JUN 12 1997 ...THUNDERSTORM WITH POSSIBLE FUNNEL CLOUD IN CENTRAL ELBERT COUNTY... AT 1152 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER KIOWA...OR ABOUT 40 MILES SOUTHEAST OF DENVER. A WEATHER SPOTTER REPORTED A FUNNEL CLOUD JUST SOUTH OF THE ELIZABETH AREA. THE STORM WAS MOVING EAST AND NORTHEAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR ELIZABETH AND KIOWA AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAIN AND HAIL WILL ALSO BE DEVELOPING WITH THIS STORM. A TORNADO WATCH IS ALSO IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 6 PM MDT. ENTREKIN
Special weather statement, Jun 12, 12:01 PM MDT, 3 hours 36 minutes before
COZ041-121830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1155 AM MDT THU JUN 12 1997 ...THUNDERSTORM WITH POSSIBLE FUNNEL CLOUD IN CENTRAL ELBERT COUNTY... AT 1152 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER KIOWA...OR ABOUT 40 MILES SOUTHEAST OF DENVER. A WEATHER SPOTTER REPORTED A FUNNEL CLOUD JUST SOUTH OF THE ELIZABETH AREA. THE STORM WAS MOVING EAST AND NORTHEAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR ELIZABETH AND KIOWA AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAIN AND HAIL WILL ALSO BE DEVELOPING WITH THIS STORM. A TORNADO WATCH IS ALSO IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 6 PM MDT. ENTREKIN
Special weather statement, Jun 12, 12:10 PM MDT, 3 hours 27 minutes before
COZ035-121845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1210 PM MDT THU JUN 12 1997 ...THUNDERSTORMS DEVELOPING IN EASTERN LARIMER COUNTY... AT 1210 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 3 MILES EAST OF POUDRE PARK...OR ABOUT 11 MILES NORTHWEST OF FORT COLLINS. SPOTTERS HAVE REPORTED 1/2 HAIL WITH THIS STORM IN POURDE PARK. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR FORT COLLINS...DRAKE...MASONVILLE...POUDRE PARK...AND WELLINGTON SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT FOR THIS AREA UNTIL 6 PM MDT THIS EVENING. RJK
Special weather statement, Jun 12, 12:11 PM MDT, 3 hours 26 minutes before
COZ035-121845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1210 PM MDT THU JUN 12 1997 ...THUNDERSTORMS DEVELOPING IN EASTERN LARIMER COUNTY... AT 1210 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 3 MILES EAST OF POUDRE PARK...OR ABOUT 11 MILES NORTHWEST OF FORT COLLINS. SPOTTERS HAVE REPORTED 1/2 HAIL WITH THIS STORM IN POURDE PARK. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR FORT COLLINS...DRAKE...MASONVILLE...POUDRE PARK...AND WELLINGTON SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT FOR THIS AREA UNTIL 6 PM MDT THIS EVENING. RJK
Special weather statement, Jun 12, 12:30 PM MDT, 3 hours 7 minutes before
COZ045-046-049-121900-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1230 PM MDT THU JUN 12 1997
...THUNDERSTORM IN
EASTERN ARAPAHOE...NORTHEASTERN ELBERT...NORTH CENTRAL LINCOLN
AND SOUTHWESTERN WASHINGTON COUNTIES OF COLORADO
AT 1221 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM 5 MILES EAST OF AGATE...OR ABOUT 16 MILES NORTHWEST OF
LIMON.
THE STORM WAS MOVING NORTHEAST AT 25 MILES PER HOUR.
PERSONS IN OR NEAR AGATE AND JOLLY RANCH
SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE
OF SAFETY IF BAD WEATHER APPROACHES.
DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS
WILL OCCUR WITH THIS STORM.
A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF EASTERN COLORADO UNTIL
600 PM MDT.
GARD...WSFO DENVERSpecial weather statement, Jun 12, 12:31 PM MDT, 3 hours 6 minutes before
COZ045-046-049-121900-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1230 PM MDT THU JUN 12 1997
...THUNDERSTORM IN
EASTERN ARAPAHOE...NORTHEASTERN ELBERT...NORTH CENTRAL LINCOLN
AND SOUTHWESTERN WASHINGTON COUNTIES OF COLORADO
AT 1221 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM 5 MILES EAST OF AGATE...OR ABOUT 16 MILES NORTHWEST OF
LIMON.
THE STORM WAS MOVING NORTHEAST AT 25 MILES PER HOUR.
PERSONS IN OR NEAR AGATE AND JOLLY RANCH
SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE
OF SAFETY IF BAD WEATHER APPROACHES.
DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS
WILL OCCUR WITH THIS STORM.
A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF EASTERN COLORADO UNTIL
600 PM MDT.
GARD...WSFO DENVERThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 2:11 PM MDT | Tornado Warning | BOU | Arapahoe, Douglas | 34 min |
| Jun 12, 2:19 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 41 min |
| Jun 12, 2:36 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 39 min |
| Jun 12, 2:55 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Weld | 50 min |
| Jun 12, 3:49 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 41 min |
| Jun 12, 4:27 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 48 min |
| Jun 12, 5:13 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 47 min |
| Jun 12, 5:24 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 36 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.