Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 66, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 19, 1997, 5:19 PM MDT for Sedgwick County, Colorado. It was in force for 41 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 19, 1997, 5:19 PM MDT (23:19 UTC)
- Expired
- Jun 19, 1997, 6:00 PM MDT
- In force
- 41 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Sedgwick County, CO
The radar
The North Platte radar (KLNX), 172 km from the middle of the area, began a volume at 23:22 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 19, 5:25 PM MDT | Hail 1.5 | Julesburg, 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 19, 2:15 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.3 hours before the alert went out and 129 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2093 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
- 49 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 192321 RRA
SVRDEN
COC115-200000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
519 PM MDT THU JUN 19 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHEASTERN SEDGWICK
INCLUDING THE FOLLOWING LOCATIONS
JULESBURG
AT 515 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 5 MILES EAST OF JULESBURG.
THE STORM WAS MOVING EAST SOUTHEAST AT 20 MILES PER HOUR.
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.
A TORNADO WATCH REMAINS IN EFFECT FOR EXTREME NORTHEAST COLORADO
UNTIL 9 PM MDT.
REPORT SEVERE WEATHER TO THE NE>AREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
LAT...LON 4100 10206 4080 10206 4080 10213 4100 10230
4100 10209
KLEYLAWhat 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 19, 3:40 PM MDT, 1 hour 39 minutes before
COZ048>050-192215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT THU JUN 19 1997 ...TORNADO WATCH CONTINUES FOR NORTHERN WASHINGTON...LOGAN... PHILLIPS AND SEDGWICK COUNTIES UNTIL 900 PM MDT... AT 335 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUING OVER SOUTHERN PORTIONS OF THE NEBRASKA PANHANDLE FROM WEST OF KIMBALL TO NORTHWEST OF BIG SPRINGS. THESE THUNDERSTORMS WERE MOVING EAST AT 20 MPH BUT WERE SLOWLY DEVELOPING SOUTHWARD AND MAY AFFECT AREAS ALONG THE COLORADO-NEBRASKA BORDER AREA BY 430 PM MDT. PERSONS OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES DURING THE NEXT 1 TO 2 HOURS. KLEYLA
Special weather statement, Jun 19, 3:43 PM MDT, 1 hour 36 minutes before
COZ048>050-192215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT THU JUN 19 1997 ...TORNADO WATCH CONTINUES FOR NORTHERN WASHINGTON...LOGAN... PHILLIPS AND SEDGWICK COUNTIES UNTIL 900 PM MDT... AT 335 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUING OVER SOUTHERN PORTIONS OF THE NEBRASKA PANHANDLE FROM WEST OF KIMBALL TO NORTHWEST OF BIG SPRINGS. THESE THUNDERSTORMS WERE MOVING EAST AT 20 MPH BUT WERE SLOWLY DEVELOPING SOUTHWARD AND MAY AFFECT AREAS ALONG THE COLORADO-NEBRASKA BORDER AREA BY 430 PM MDT. PERSONS OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE T2O A PLACE OF SAFETY IF BAD WEATHER APPROACHES DURING THE NEXT 1 TO 2 HOURS. KLEYLA
Special weather statement, Jun 19, 4:42 PM MDT, 37 minutes before
COZ048>050-192330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 442 PM MDT THU JUN 19 1997 ...TORNADO WATCH CONTINUES FOR NORTHERN WASHINGTON...LOGAN... PHILLIPS AND SEDGWICK COUNTIES UNTIL 900 PM MDT... AT 438 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED WIDELY SCATTERED THUNDERSTORMS DEVELOPING OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES ALONG THE COLORADO-NEBRASKA BORDER. THESE THUNDERSTORMS WILL LIKELY INTENSIFY AND MAY PRODUCE HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING AS THEY MOVE EASTWARD. PERSONS OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES DURING THE HOUR. KLEYLA
Special weather statement, Jun 19, 4:43 PM MDT, 36 minutes before
COZ048>050-192330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 442 PM MDT THU JUN 19 1997 ...TORNADO WATCH CONTINUES FOR NORTHERN WASHINGTON...LOGAN... PHILLIPS AND SEDGWICK COUNTIES UNTIL 900 PM MDT... AT 438 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED WIDELY SCATTERED THUNDERSTORMS DEVELOPING OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES ALONG THE COLORADO-NEBRASKA BORDER. THESE THUNDERSTORMS WILL LIKELY INTENSIFY AND MAY PRODUCE HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING AS THEY MOVE EASTWARD. PERSONS OVER NORTHERN PORTIONS OF LOGAN AND SEDGWICK COUNTIES SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES DURING THE HOUR. KLEYLA
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.