Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 46, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 1997, 4:22 PM MDT for Larimer County, Weld County, Colorado. It was in force for 23 min. 1 report came from 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, with what was reported inside it.
The facts
- Issued
- Jun 14, 1997, 4:22 PM MDT (22:22 UTC)
- Expired
- Jun 14, 1997, 4:45 PM MDT
- In force
- 23 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Larimer County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 42 km from the middle of the area, began a volume at 22:23 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 14, 4:38 PM MDT | Hail 1 | Wellington, CO |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 14, 3:15 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.4 hours before the alert went out and 178 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
- 262 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 75 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 142223 RRA
SVRDEN
COC069-123-142245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
422 PM MDT SAT JUN 14 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHWESTERN WELD
IN NORTH CENTRAL COLORADO
NORTHEASTERN LARIMER
INCLUDING THE FOLLOWING LOCATIONS
NORTH CENTRAL FORT COLLINS...BELLVUE...CARR...NATURAL FORT REST
AREA...ROCKPORT...TEDS PLACE AND WELLINGTON
AT 420 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 11 MILES NORTH OF WELLINGTON...OR ABOUT 18 MILES
NORTH OF FORT COLLINS.
THE STORM WAS MOVING NORTHEAST AT 25 MILES PER HOUR.
A TORNADO WATCH REMAINS IN EFFECT FOR NORTHEAST COLORADO UNTIL 900
PM THIS EVENING.
THE STORMS OVER THIS AREA HAVE HAD A HISTORY OF PRODUCING HAIL UP TO
1 1/4 INCHES IN DIAMETER.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
RJK
LAT...LON 4091 10475 4071 10485 4063 10493 4058 10522
4100 10516 4B100 10479What 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 14, 11:25 AM MDT, 4 hours 57 minutes before
COZ030-032>050-150600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1125 AM MDT SAT JUN 14 1997 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: SEVERAL INGREDIENTS FOR SEVERE WEATHER ON THE NORTHEAST COLORADO PLAINS APPEAR TO BE COMING TOGETHER TODAY. AN UPPER LEVEL TROUGH IS LOCATED OVER UTAH AND NORTHERN ARIZONA WITH STRONG SOUTHWESTERLY FLOW ACROSS COLORADO. AT LOWER LEVELS...DEWPOINTS ARE IN THE MID AND UPPER 50S ACROSS NORTHEAST COLORADO WITH SOUTHEASTERLY WINDS POISED TO BRING ADDITIONAL LOW LEVEL MOISTURE INTO THE REGION THIS AFTERNOON. MOST OF THIS MORNINGS CLOUDINESS HAS DISSIPATED AND SUNSHINE WILL WARM TEMPERATURES INTO THE MID AND UPPER 70S. THE ATMOSPHERE WILL BECOME QUITE UNSTABLE THIS AFTERNOON AND THE WIND PROFILE FROM THE SURFACE TO UPPER LEVELS WILL BE ABLE TO ORGANIZE CONVECTION INTO STRONG AND...AT TIMES...SEVERE THUNDERSTORMS. THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE LARGE HAIL AND DAMAGING WINDS. TORNADOES WILL ALSO BE POSSIBLE. BRIEF HEAVY RAINS MAY ALSO CAUSE LOCALIZED FLOODING PROBLEMS. INITIAL THUNDERSTORMS WILL DEVELOP OVER THE FOOTHILLS BY 1 PM AND THEN MOVE EASTWARD THROUGH THE REMAINDER OF THE AFTERNOON. THUNDERSTORM ACTIVITY ON THE PLAINS EAST OF THE I-25 CORRIDOR WILL PROBABLY CONTINUE WELL INTO THE EVENING. SPOTTER ACTIVATION IS PROBABLE FOR THIS AFTERNOON AND EVENING. DANKERS
Special weather statement, Jun 14, 11:28 AM MDT, 4 hours 54 minutes before
COZ030-032>050-150600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1125 AM MDT SAT JUN 14 1997 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: SEVERAL INGREDIENTS FOR SEVERE WEATHER ON THE NORTHEAST COLORADO PLAINS APPEAR TO BE COMING TOGETHER TODAY. AN UPPER LEVEL TROUGH IS LOCATED OVER UTAH AND NORTHERN ARIZONA WITH STRONG SOUTHWESTERLY FLOW ACROSS COLORADO. AT LOWER LEVELS...DEWPOINTS ARE IN THE MID AND UPPER 50S ACROSS NORTHEAST COLORADO WITH SOUTHEASTERLY WINDS POISED TO BRING ADDITIONAL LOW LEVEL MOISTURE INTO THE REGION THIS AFTERNOON. MOST OF THIS MORNING'S CLOUDINESS HAS DISSIPATED AND SUNSHINE WILL WARM TEMPERATURES INTO THE MID AND UPPER 70S. THE ATMOSPHERE WILL BECOME QUITE UNSTABLE THIS AFTERNOON AND THE WIND PROFILE FROM THE SURFACE TO UPPER LEVELS WILL BE ABLE TO ORGANIZE CONVECTION INTO STRONG AND...AT TIMES...SEVERE THUNDERSTORMS. THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE LARGE HAIL AND DAMAGING WINDS. TORNADOES WILL ALSO BE POSSIBLE. BRIEF HEAVY RAINS MAY ALSO CAUSE LOCALIZED FLOODING PROBLEMS. INITIAL THUNDERSTORMS WILL DEVELOP OVER THE FOOTHILLS BY 1 PM AND THEN MOVE EASTWARD THROUGH THE REMAINDER OF THE AFTERNOON. THUNDERSTORM ACTIVITY ON THE PLAINS EAST OF THE I-25 CORRIDOR WILL PROBABLY CONTINUE WELL INTO THE EVENING. SPOTTER ACTIVATION IS PROBABLE FOR THIS AFTERNOON AND EVENING. DANKE<RS
Special weather statement, Jun 14, 3:35 PM MDT, 47 minutes before
COZ033-035-142205- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 335 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORMS OVER NORTH CENTRAL LARIMER COUNTY... AT 330 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES NORTH OF RED FEATHER LAKES...OR ABOUT 32 MILES NORTHWEST OF FORT COLLINS. THE STORM WAS MOVING NORTHEAST AT 20 TO 25 MPH. PERSONS IN OR NEAR RED FEATHER LAKES AND VIRGINIA DALE SHOULD BE ON THE LOOKOUT FOR LARGE HAIL AND WINDS UP TO 45 MPH WITH THIS STORM AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST COLORADO UNTIL 900 PM MDT. RJK
Special weather statement, Jun 14, 3:36 PM MDT, 46 minutes before
COZ033-035-142205- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 335 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORMS OVER NORTH CENTRAL LARIMER COUNTY... AT 330 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES NORTH OF RED FEATHER LAKES...OR ABOUT 32 MILES NORTHWEST OF FORT COLLINS. THE STORM WAS MOVING NORTHEAST AT 20 TO 25 MPH. PERSONS IN OR NEAR RED FEATHER LAKES AND VIRGINIA DALE SHOULD BE ON THE LOOKOUT FOR LARGE HAIL AND WINDS UP TO 45 MPH WITH THIS STORM AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST COLORADO UNTIL 900 PM MDT. RJK
Special weather statement, Jun 14, 3:40 PM MDT, 42 minutes before
COZ046-047-142210- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 335 PM MDT SAT JUN 14 1997 ...THUNDERSTORMS MAY BECOME SEVERE SHORTLY OVER PORTIONS OF LINCOLN AND ELBERT COUNTIES... AT 335 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS STRENGHTENING RAPIDLY OVER SOUTHERN LINCOLN AND SOUTHERN ELBERT COUNTIES. THE STRONGEST STORM WAS LOCATED IN SOUTH CENTRAL ELBERT COUNTY...12 MILES NORTH OF THE TOWN OF RAMAH. STORMS WERE MOVING NORTH AT 15 TO 20 MPH. TORNADOES...LARGE HAIL...HEAVY RAIN...AND STRONG GUSTY WINDS WILL BE POSSIBLE WITH THESE STORMS. A TORNADO WATCH IS IN EFFECT FOR NEARLY ALL OF NORTHEAST COLORADO UNTIL 900PM MDT. BAKER
Special weather statement, Jun 14, 3:45 PM MDT, 37 minutes before
COZ035-038-039-142220- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 345 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORMS IN SOUTHEASTERN LARIMER AND CENTRAL BOULDER COUNTIES... AT 345 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS DEVELOPING OVER RIVERSIDE...OR ABOUT 33 MILES SOUTHWEST OF FORT COLLINS. THE STORMS WERE MOVING NORTHEAST AT 15 MPH. PERSONS IN OR NEAR SOUTHERN FORT COLLINS...NORTHWESTERN LONGMONT... BERTHOUD...DRAKE...GOLD HILL...HARMONY...JAMESTOWN...LOVELAND... LYONS...MASONVILLE...NEDERLAND...PEACEFUL VALLEY...RAYMOND...TIMNATH AND WARD SHOULD BE ON THE LOOKOUT FOR LARGE HAIL...STRONG WINDS...AND POSSIBLE TORNADOES WITH THESE STORMS AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST COLORADO UNTIL 900 PM THIS EVENING. RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 6:12 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 48 min |
| Jun 13, 6:12 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 33 min |
| Jun 13, 6:30 PM MDT | Flash Flood Warning | BOU | Weld | 16 hr |
| Jun 13, 6:57 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 43 min |
| Jun 13, 7:07 PM MDT | Tornado Warning | BOU | Elbert | 23 min |
| Jun 13, 7:30 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 45 min |
| Jun 13, 8:15 PM MDT | Tornado Warning | BOU | Elbert | 30 min |
| Jun 13, 8:47 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 43 min |
| Jun 13, 9:31 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 44 min |
| Jun 14, 3:53 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 42 min |
| Jun 14, 3:55 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Larimer | 35 min |
| Jun 14, 4:26 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 29 min |
| Jun 14, 4:26 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Washington | 29 min |
| Jun 14, 4:39 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 51 min |
| Jun 14, 4:45 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
| Jun 14, 5:00 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Washington | 35 min |
| Jun 14, 5:00 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 35 min |
| Jun 14, 5:23 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 52 min |
| Jun 14, 5:51 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 29 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.