Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 57, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 1997, 7:55 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado. It was in force for 45 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, 7:55 PM MDT (01:55 UTC)
- Expired
- Jun 14, 1997, 8:40 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO
The radar
The Cheyenne radar (KCYS), 174 km from the middle of the area, began a volume at 01:54 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, 8:08 PM MDT | Hail 1.5 | Fleming, CO | Trees and crops were damaged but no estimate was available. |
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 00:00Z, 1.9 hours before the alert went out and 105 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
- 70 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 2413 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -71 m²/s²
- 0-3 km storm-relative helicity
- -39 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 150155
SVRDEN
COC075-095-115-150235-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
755 PM MDT SAT JUN 14 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 840 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
EASTERN LOGAN...WESTERN PHILLIPS AND WESTERN SEDGWICK
INCLUDING THE FOLLOWING LOCATIONS
CROOK...FLEMING...HAXTUN...HIGHLAND CENTER...ILIFF...PROCTOR...
SEDGWICK...ST PETERSBURG AND TWIN BUTTES
AT 750 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF SEVERE THUNDERSTORMS ACROSS CENTRAL LOGAN COUNTY...WITH THE STRONGEST
STORM LOCATED 10 MILES SOUTH OF ILIFF...OR ABOUT 8 MILES EAST OF
STERLING.
AT 748 PM MDT THE FIRE DEPARTMENT OFFICIAL RELAYED TO THE NATIONAL
WEATHER SERVICE SEVERAL REPORTS BY THE PUBLIC OF FUNNEL CLOUDS NEAR
THE TOWN OF PROCTER...OR ABOUT 18 MILES NORTHEAST OF STERLING.
THESE STORMS WERE MOVING NORTHEAST AT 30 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 NORTHEAST COLORADO UNTIL 9 PM MDT.
VERY LARGE HAIL AND WIND GUSTS IN EXCESS OF 60 MPH ARE POSSIBLE WITH
THESE SEVERE THUNDERSTORMS. IF YOU ARE IN THE PATH OF THESE STORMS...
PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
BAKER
LAT...LON 4100 10246 4046 10260 4048 10309 4067 10316
4095 10304What 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, 3:40 PM MDT, 4 hours 15 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, 4 hours 10 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
Special weather statement, Jun 14, 5:34 PM MDT, 2 hours 21 minutes before
COZ040-140010- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 535 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORMS MOVING EASTWARD THROUGH DOUGLAS COUNTY... AT 530 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS MOVING EAST THROUGH DOUGLAS COUNTY. THE STRONGEST STORM WAS LOCATED 7 MILES NORTHEAST OF CASTLE ROCK...OR 34 MILES SOUTH OF DENVER. THIS LINE OF STORMS WAS MOVING EAST-NORTHEAST AT 25 MPH. PERSONS IN OR NEAR CASTLE ROCK...FRANTOWN...LARKSPUR...BEVERLY HILLS...PARKER...GREENLAND AND SILVER HEIGHTS SHOULD BE ON THE LOOKOUT FOR LARGE HAIL...VERY STRONG WIND GUSTS...FUNNEL CLOUDS 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. BAKER
Special weather statement, Jun 14, 5:35 PM MDT, 2 hours 20 minutes before
COZ040-140010- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 535 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORMS MOVING EASTWARD THROUGH DOUGLAS COUNTY... AT 530 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS MOVING EAST THROUGH DOUGLAS COUNTY. THE STRONGEST STORM WAS LOCATED 7 MILES NORTHEAST OF CASTLE ROCK...OR 34 MILES SOUTH OF DENVER. THIS LINE OF STORMS WAS MOVING EAST-NORTHEAST AT 25 MPH. PERSONS IN OR NEAR CASTLE ROCK...FRANTOWN...LARKSPUR...BEVERLY HILLS...PARKER...GREENLAND AND SILVER HEIGHTS SHOULD BE ON THE LOOKOUT FOR LARGE HAIL...VERY STRONG WIND GUSTS...FUNNEL CLOUDS 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. BAKER
Special weather statement, Jun 14, 7:26 PM MDT, 29 minutes before
COZ045-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 726 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORM IN EASTERN ADAMS COUNTY... AT 725 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 7 MILES SOUTHWEST OF SHAMROCK...OR ABOUT 31 MILES SOUTH OF FORT MORGAN. THE STORM WAS MOVING EAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR LEADER AND SHAMROCK SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. THIS AFTERNOONS THUNDERSTORMS ACROSS THE AREA HAVE HAD A HISTORY OF PRODUCING HAIL UP TO 1 1/2 INCHES IN DIAMETER AND RAINFALL AMOUNTS OF AROUND 1 INCH. A TORNADO WATCH REMAINS IN EFFECT FOR NORTHEASTERN COLORADO UNTIL 900 PM. RJK
Special weather statement, Jun 14, 7:28 PM MDT, 27 minutes before
COZ045-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 726 PM MDT SAT JUN 14 1997 ...STRONG THUNDERSTORM IN EASTERN ADAMS COUNTY... AT 725 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 7 MILES SOUTHWEST OF SHAMROCK...OR ABOUT 31 MILES SOUTH OF FORT MORGAN. THE STORM WAS MOVING EAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR LEADER AND SHAMROCK SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. THIS AFTERNOON'S THUNDERSTORMS ACROSS THE AREA HAVE HAD A HISTORY OF PRODUCING HAIL UP TO 1 1/2 INCHES IN DIAMETER AND RAINFALL AMOUNTS OF AROUND 1 INCH. A TORNADO WATCH REMAINS IN EFFECT FOR NORTHEASTERN COLORADO UNTIL 900 PM. RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 6:05 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 35 min |
| Jun 14, 7:35 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Washington | 25 min |
| Jun 14, 8:52 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Sedgwick | 38 min |
| Jun 14, 9:38 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 27 min |
| Jun 15, 12:33 AM MDT | Flash Flood Warning | BOU | Phillips | 3 hr |
| Jun 15, 3:25 AM MDT | Flash Flood Warning | BOU | Phillips | 2 hr |
| Jun 15, 5:23 AM MDT | Flash Flood Warning | BOU | Phillips | 3 hr |
| Jun 15, 1:41 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 34 min |
| Jun 15, 3:11 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Weld | 34 min |
| Jun 15, 3:20 PM MDT | Tornado Warning | BOU | Adams, Weld | 25 min |
| Jun 15, 3:20 PM MDT | Tornado Warning | BOU | Boulder | 25 min |
| Jun 15, 3:53 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 32 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.