Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 101, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 15, 1997, 3:56 PM MDT for Sedgwick County, Colorado. It was in force for 34 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
- Jul 15, 1997, 3:56 PM MDT (21:56 UTC)
- Expired
- Jul 15, 1997, 4:30 PM MDT
- In force
- 34 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Sedgwick County, CO
The radar
The Goodland radar (KGLD), 167 km from the middle of the area, began a volume at 21:56 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.9 hours before the alert went out and 135 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
- 22 J/kg
- Mixed-layer CIN
- -464 J/kg
- Mixed-layer LCL
- 1830 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
226
WUUS1 KDEN 152157 RRA
SVRDEN
COC115-152230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
356 PM MDT TUE JUL 15 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
SOUTHEASTERN SEDGWICK
AT 353 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER SOUTHEASTERN SEDGWICK COUNTY...ABOUT 13
MILES SOUTHEAST OF JULESBURG.
A STORM SPOTTER 10 MILES SOUTHEAST OF JULESBURG REPORTED ONE INCH
DIAMETER HAIL WITH THIS THUNDERSTORM.
THE STORM WAS NEARLY STATIONARY.
HEAVY RAINS MAY ALSO CAUSE FLOODING OF LOW LYING AREAS IN SOUTHEAST
SEDGWICK COUNTY.
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 4077 10209 4077 10226 4090 10227 4094 10208
DANKERS
&What 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, Jul 15, 11:00 AM MDT, 4 hours 56 minutes before
COZ030-032>050-160600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT TUE JUL 15 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: HIGH PRESSURE IN THE UPPER ATMOSPHERE CONTINUES ACROSS THE FOUR CORNERS REGION. SOME MID AND HIGH LEVEL MOISTURE WILL PUSH INTO THE REGION LATER THIS AFTERNOON AND EVENING...COUPLED WITH STRONG HEATING TO PRODUCE ONLY ISOLATED THUNDERSTORMS. SOME GUSTY WINDS WITH THESE STORMS BUT HARDLY ANY RAIN EXPECTED. STORMS WILL INITIALLY DEVELOP ACROSS THE MOUNTAINS AND ALONG THE HIGHER TERRAIN ALONG THE PALMER DIVIDE AFTER 3 PM...THEN DRIFT OUT INTO THE URBAN COORDIOR AFTER 4 PM. ACROSS THE NORTHEAST PLAINS...ISOLATED STORMS WILL NOT DEVELOP UNTIL THIS EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. ENTREKIN
Special weather statement, Jul 15, 11:08 AM MDT, 4 hours 48 minutes before
COZ030-032>050-160600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT TUE JUL 15 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: HIGH PRESSURE IN THE UPPER ATMOSPHERE CONTINUES ACROSS THE FOUR CORNERS REGION. SOME MID AND HIGH LEVEL MOISTURE WILL PUSH INTO THE REGION LATER THIS AFTERNOON AND EVENING...COUPLED WITH STRONG HEATING TO PRODUCE ONLY ISOLATED THUNDERSTORMS. SOME GUSTY WINDS WITH THESE STORMS BUT HARDLY ANY RAIN EXPECTED. STORMS WILL INITIALLY DEVELOP ACROSS THE MOUNTAINS AND ALONG THE HIGHER TERRAIN ALONG THE PALMER DIVIDE AFTER 3 PM...THEN DRIFT OUT INTO THE URBAN COORDIOR AFTER 4 PM. ACROSSr THE NORTHEAST PLAINS...ISOLATED STORMS WILL NOT DEVELOP UNTIL THIS EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. ENTREKIN
Special weather statement, Jul 15, 12:23 PM MDT, 3 hours 33 minutes before
COZ030-032>050-160600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1220 PM MDT TUE JUL 15 1997 ...UPDATE... 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: A LINE OF THUNDERSTORMS HAVE FORMED ALONG A BOUNDARY...WHICH STRETCHES FROM WESTERN YUMA COUNTY SOUTHWESTWARD INTO SOUTHWEST LINCOLN COUNTY. WITH THE SURFACE MOISTURE HIGHER IN THESE PARTS...SOME SMALL HAIL...HEAVY RAIN AND GUSTY WINDS ARE POSSIBLE WITH THESE STORMS. OUTFLOW BOUNDARIES FROM THIS LINE WILL INTERACT TO PRODUCE ISOLATED THUNDERSTORMS IN OTHER AREAS OF THE NORTHEAST PLAINS LATER THIS AFTERNOON. ACROSS THE REMAINDER OF THE OUTLOOK AREA...ISOLATED THUNDERSTORMS WILL DEVELOP AFTER 3 PM ESPECIALLY OVER HIGHER TERRAIN AND PRODUCING MAINLY GUSTY WINDS. ENTREKIN
Special weather statement, Jul 15, 3:36 PM MDT, 20 minutes before
COZ050-152200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 336 PM MDT TUE JUL 15 1997 ...THUNDERSTORM WITH HEAVY RAIN IN SEDGWICK COUNTY... AT 336 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER SOUTHEASTERN SEDGWICK COUNTY...ABOUT 14 MILES SOUTHEAST OF JULESBURG. THE STORM HAS SHOWN LITTLE MOVEMENT IN THE PAST HALF HOUR. RESIDENTS SHOULD BE ON THE LOOKOUT FOR SMALL HAIL AND HEAVY RAINS...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. DANKERS
Special weather statement, Jul 15, 3:39 PM MDT, 17 minutes before
COZ050-152200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 336 PM MDT TUE JUL 15 1997 ...THUNDERSTORM WITH HEAVY RAIN IN SEDGWICK COUNTY... AT 336 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER SOUTHEASTERN SEDGWICK COUNTY...ABOUT 14 MILES SOUTHEAST OF JULESBURG. THE STORM HAS SHOWN LITTLE MOVEMENT IN THE PAST HALF HOUR. RESIDENTS SHOULD BE ON THE LOOKOUT FOR SMALL HAIL AND HEAVY RAINS...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 0MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. DANKERS
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.