Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 146, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 28, 1997, 12:25 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 65 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 28, 1997, 12:25 PM MDT (18:25 UTC)
- Expired
- Aug 28, 1997, 1:30 PM MDT
- In force
- 65 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Elbert County, CO, Lincoln County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 12:54 PM MDT | Hail 1.75 | Limon, 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 nearest sounding before it
Fort Carson/Butt, CO (KFCS), launched 12:00Z, 6.4 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 281826 RRA
SVRDEN
COC039-073-281930-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1225 PM MDT THU AUG 28 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 130 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN EAST CENTRAL COLORADO
SOUTHEASTERN ELBERT AND CENTRAL LINCOLN
AT 1225 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER SOUTHEASTERN ELBERT COUNTY...OR ABOUT 14
MILES SOUTH OF LIMON.
THE STORM WAS MOVING VERY SLOWLY TO THE EAST.
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
VERY LARGE HAIL UP TO 1.5 INCHES IN DIAMETER IS 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 SHELTER.
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 3902 1034*7 3897 10376 3916 10380 3924 10358What 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, 55 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, 53 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
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 4:58 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 47 min |
| 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.