Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 148, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 28, 1997, 4:58 PM MDT for Douglas County, Elbert County, Colorado. It was in force for 47 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
- Aug 28, 1997, 4:58 PM MDT (22:58 UTC)
- Expired
- Aug 28, 1997, 5:45 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Douglas County, CO, Elbert County, CO
The nearest sounding before it
Fort Carson/Butt, CO (KFCS), launched 12:00Z, 11.0 hours before the alert went out and 91 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
- 972 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 99 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 282258 RRA
SVRDEN
COC035-039-282345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
458 PM MDT THU AUG 28 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHEASTERN DOUGLAS
IN EAST CENTRAL COLORADO
NORTHWESTERN ELBERT
INCLUDING THE FOLLOWING LOCATIONS
PONDEROSA PARK
AT 456 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 4 MILES NORTHWEST OF PONDEROSA PARK...OR ABOUT 26
MILES SOUTHEAST OF DENVER.
THE STORM WAS MOVING EAST AT 25 MILES PER HOUR. BY 530 PM...THIS
STORM WILL BE LOCATED JUST NORTH OF KIOWA.
LARGE HAIL UP TO 1 INCH IN DIAMETER AND GUSTY WINDS UP TO 60 MPH ARE
POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF
THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL
SHEL|TER.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
BARJENBRUCH
LAT...LON 3956 10428 3936 10432 3936 10471 3956 10473What 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, Aug 28, 11:30 AM MDT, 5 hours 28 minutes before
COZ030-032>050-290600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1130 AM MDT THU AUG 28 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: A NARROW STREAM OF MONSOONAL MOISTURE CONTINUES TO MOVE OVER COLORADO TODAY AS AN UPPER LEVEL HIGH PRESSURE AREA REMAINS ENTRENCHED OVER THE REGION. A WEAK UPPER LEVEL WEATHER DISTURBANCE IS ROTATING AROUND THE HIGH PRESSURE RIDGE THIS MORNING AND WAS LOCATED OVER SOUTHERN WYOMING. THIS SYSTEM WILL MOVE EASTWARD THROUGH THE EVENING AND MAY ASSIST SHOWER AND THUNDERSTORM DEVELOPMENT ON THE PLAINS BY THIS EVENING. SURFACE WINDS ON THE NORTHEAST COLORADO PLAINS ARE GENERALLY WEAK TODAY WHICH MEANS THERE ARE NO FAVORED AREAS FOR THUNDERSTORM DEVELOPMENT LATER THIS AFTERNOON. EXCEPT FOR A LINE OF SHOWERS DEVELOPING OVER A BOUNDARY IN CENTRAL LINCOLN COUNTY LATE THIS MORNING...OTHER SHOWERS THAT DEVELOP SHOULD BE CAUSED BY AFTERNOON HEATING OVER THE FOOTHILLS. THUNDERSTORMS WILL THEN PROGRESS EASTWARD THROUGH THE LATE AFTERNOON AND EVENING. WITH THE WEAK UPPER LEVEL DISTURBANCE MOVING ACROSS WYOMING...THE STORMS WITH THE BEST CHANCE OF BECOMING STRONGER THAN NORMAL WILL BE IN LARIMER...WELD AND LOGAN COUNTIES. WINDS ALOFT WILL BE STRONG ENOUGH TO KEEP STORMS MOVING...WHICH WILL MINIMIZE THE THREAT OF HEAVY RAINS. STORMS WILL HAVE THE POTENTIAL TO PRODUCE SMALL HAIL. STORMS ARE NOT EXPECTED TO REACH SEVERE LIMITS AND SPOTTER ACTIVATION IS NOT EXPECTED. DANKERS
Special weather statement, Aug 28, 11:32 AM MDT, 5 hours 26 minutes before
COZ030-032>050-290600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1130 AM MDT THU AUG 28 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: A NARROW STREAM OF MONSOONAL MOISTURE CONTINUES TO MOVE OVER COLORADO TODAY AS AN UPPER LEVEL HIGH PRESSURE AREA REMAINS ENTRENCHED OVER THE REGION. A WEAK UPPER LEVEL WEATHER DISTURBANCE IS ROTATING AROUND THE HIGH PRESSURE RIDGE THIS MORNING AND WAS LOCATED OVER SOUTHERN WYOMING. THIS SYSTEM WILL MOVE EASTWARD THROUGH THE EVENING AND MAY ASSIST SHOWER AND THUNDERSTORM DEVELOPMENT ON THE PLAINS BY THIS EVENING. SURFACE WINDS ON THE NORTHEAST COLORADO PLAINS ARE GENERALLY WEAK TODAY WHICH MEANS THERE ARE NO FAVORED AREAS FOR THUNDERSTORM DEVELOPMENT LATER THIS AFTERNOON. EXCEPT FOR A LINE OF SHOWERS DEVELOPING OVER A BOUNDARY IN CENTRAL LINCOLN COUNTY LATE THIS MORNING...OTHER SHOWERS THAT DEVELOP SHOULD BE CAUSED BY AFTERNOON HEATING OVER THE FOOTHILLS. THUNDERSTORMS WILL THEN PROGRESS EASTWARD THROUGH THE LATE AFTERNOON AND EVENING. WITH THE WEAK UPPER LEVEL DISTURBANCE MOVING ACROSS WYOMING...THE STORMS WITH THE BEST CHANCE OF BECOMING STRONGER THAN NORMAL WILL BE IN LARIMER...WELD AND LOGAN COUNTIES. WINDS ALOFT WILL BE STRONG ENOUGH TO KEEP STORMS MOVING...WHICH WILL MINIMIZE THE THREAT OF HEAVY RAINS. STORMS WILL HAVE THE POTENTIAL TO PRODUCE SMALL HAIL. STORMS ARE NOT EXPECTED TO REACH SEVERE LIMITS AND SPOTTER ACTIVATION IS NOT EXPECTED. DANKERS
Special weather statement, Aug 28, 3:46 PM MDT, 1 hour 12 minutes before
COZ039-043-282230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 346 PM MDT THU AUG 28 1997 ...STRONG THUNDERSTORM MOVING THROUGH SOUTHEASTERN BOULDER COUNTY AND INTO SOUTHWESTERN WELD COUNTY... AT 346 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES WEST OF LOUISVILLE...OR ABOUT 20 MILES NORTHWEST OF DENVER. THE STORM WAS MOVING NORTHEAST AT 25 MILES PER HOUR. PERSONS IN OR NEAR LOUISVILLE...ERIE...FIRESTONE...AND LAFAYETTE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. THIS STORM WILL PRODUCE PEA TO MARBLE SIZED HAIL...GUSTY WINDS UP TO 45 MPH...AND A QUICK 1/2 INCH OF RAIN. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY...UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. BARJENBRUCH
Special weather statement, Aug 28, 3:49 PM MDT, 1 hour 9 minutes before
COZ039-043-282230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 346 PM MDT THU AUG 28 1997 ...STRONG THUNDERSTORM MOVING THROUGH SOUTHEASTERN BOULDER COUNTY AND INTO SOUTHWESTERN WELD COUNTY... AT 346 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES WEST OF LOUISVILLE...OR ABOUT 20 MILES NORTHWEST OF DENVER. THE STORM WAS MOVING NORTHEAST AT 25 MILES PER HOUR. PERSONS IN OR NEAR LOUISVILLE...ERIE...FIRESTONE...AND LAFAYETTE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. THIS STORM WILL PRODUCE PEA TO MARBLE SIZED HAIL...GUSTY WINDS UP TO 45 MPH...AND A QUICK 1/2 INCH OF RAIN. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY...UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 12:25 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 65 min |
| Aug 28, 2:00 PM MDT | Flash Flood Warning | BOU | Elbert, Lincoln | 2 hr |
| Aug 28, 2:00 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 2 hr |
| Aug 28, 5:34 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 41 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.