Alert archive / Colorado / Tornado Warnings in 1998
Tornado Warning 14, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jul 4, 1998, 5:18 PM MDT for Weld County, Colorado. It was in force for 27 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 4, 1998, 5:18 PM MDT (23:18 UTC)
- Expired
- Jul 4, 1998, 5:45 PM MDT
- In force
- 27 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Weld County, CO
The radar
The Denver radar (KFTG), 79 km from the middle of the area, began a volume at 23:18 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
Denver, CO (KDNR), launched 12:00Z, 11.3 hours before the alert went out and 117 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
- 2072 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
628
WFUS1 KDEN 042320 RRA
TORDEN
COC123-042345-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
518 PM MDT SAT JUL 4 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL WELD COUNTY IN NORTHEAST COLORADO
* UNTIL 545 PM MDT
* AT 512 PM MDT...THE PUBLIC REPORTED A TORNADO 10 MILES EAST OF
GILL...OR ABOUT 20 MILES EAST OF GREELEY...MOVING NORTH AT
15 MILES PER HOUR.
LOCATIONS IN THE WARNING INCLUDE...CORNISH
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
LAT...LON 4056 10447 4035 10448 4037 10416 4058 10415What forecasters said that day
The local office's own words before this tornado 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 4, 11:25 AM MDT, 5 hours 53 minutes before
COZ030-032>050-050600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1125 AM MDT SAT JUL 4 1998 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: DECENT EASTERLY UPSLOPE FLOW AND PLENTY OF DEEP MOISTURE WILL BE AVAILABLE THIS AFTERNOON AND EVENING FOR THUNDERSTORM DEVELOPMENT ACROSS THE AREA. THE SUN'S HEATING AND OUTFLOW FROM OTHER THUNDERSTORMS WILL BE THE MAIN FACTOR IN STARTING THUNDERSTORM DEVELOPMENT. CURRENTLY...AREAS SUCH AS THE NORTHEAST CORNER WHERE THE SURFACE MOISTURE IS THE HIGHEST...ARE UNDER MOSTLY CLOUDY SKIES. THIS WILL RETARD DECENT HEATING UNTIL THE CLOUDS DISSIPATE AROUND NOON TIME. ALSO...BY LATE THIS AFTERNOON INTO THIS EVENING ...FORECAST MODELS SHOW SOME WEAK LIFT AVAILABLE WITH A SMALL UPPER LEVEL FEATURE WHICH COULD ALSO AID IN THUNDERSTORM DEVELOPMENT AND COVERAGE. WEAK STEERING WINDS ALONG WITH THE AMPLE MOISTURE WILL PRODUCING HEAVY RAINS IN SOME AREAS FROM THESE STORMS. A FEW THUNDERSTORMS MAY REACH SEVERE LIMITS WHERE THE LOW LEVEL MOISTURE IS THE HIGHEST...OVER THE NORTHEAST CORNER AFTER 4 PM. BUT OVER ALL THE MAIN THREAT WILL BE HEAVY RAINS OVER THE FORECAST AREA. THE MOUNTAINS AND FOOTHILLS CAN EXPECTED SCATTERED SHOWERS AND STORMS BY NOON TIME...WITH SCATTERED COVERAGE REACHING...FIRST THE WESTERN PLAINS BY 2:30 PM...THEN THE EASTERN PLAINS BY 4 PM. SPOTTER ACTIVATION MAY BE NEEDED BY MID AFTERNOON. RJK
Special weather statement, Jul 4, 11:25 AM MDT, 5 hours 53 minutes before
COZ030-032>050-050600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1125 AM MDT SAT JUL 4 1998 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: DECENT EASTERLY UPSLOPE FLOW AND PLENTY OF DEEP MOISTURE WILL BE AVAILABLE THIS AFTERNOON AND EVENING FOR THUNDERSTORM DEVELOPMENT ACROSS THE AREA. THE SUN'S HEATING AND OUTFLOW FROM OTHER THUNDERSTORMS WILL BE THE MAIN FACTOR IN STARTING THUNDERSTORM DEVELOPMENT. CURRENTLY...AREAS SUCH AS THE NORTHEAST CORNER WHERE THE SURFACE MOISTURE IS THE HIGHEST...ARE UNDER MOSTLY CLOUDY SKIES. THIS WILL RETARD DECENT HEATING UNTIL THE CLOUDS DISSIPATE AROUND NOON TIME. ALSO...BY LATE THIS AFTERNOON INTO THIS EVENING ...FORECAST MODELS SHOW SOME WEAK LIFT AVAILABLE WITH A SMALL UPPER LEVEL FEATURE WHICH COULD ALSO AID IN THUNDERSTORM DEVELOPMENT AND COVERAGE. WEAK STEERING WINDS ALONG WITH THE AMPLE MOISTURE WILL PRODUCING HEAVY RAINS IN SOME AREAS FROM THESE STORMS. A FEW THUNDERSTORMS MAY REACH SEVERE LIMITS WHERE THE LOW LEVEL MOISTURE IS THE HIGHEST...OVER THE NORTHEAST CORNER AFTER 4 PM. BUT OVER ALL THE MAIN THREAT WILL BE HEAVY RAINS OVER THE FORECAST AREA. THE MOUNTAINS AND FOOTHILLS CAN EXPECTED SCATTERED SHOWERS AND STORMS BY NOON TIME...WITH SCATTERED COVERAGE REACHING...FIRST THE WESTERN PLAINS BY 2:30 PM...THEN THE EASTERN PLAINS BY 4 PM. SPOTTER ACTIVATION MAY BE NEEDED BY MID AFTERNOON. RJK
Nearby
Tornado Warnings in Colorado, 1998Every tornado warning in 1998Tornadoes in 1998
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.