Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 8, 1998, 1:55 PM MDT for Elbert County, Colorado. It was in force for 50 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
- May 8, 1998, 1:55 PM MDT (19:55 UTC)
- Expired
- May 8, 1998, 2:45 PM MDT
- In force
- 50 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Elbert County, CO
The radar
The Denver radar (KFTG), 63 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 73 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
- 1711 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- -45 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 081955 RRA
SVRDEN
COC039-082045-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
155 PM MDT FRI MAY 8 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN ELBERT COUNTY IN EAST CENTRAL COLORADO
* UNTIL 245 PM MDT
* AT 155 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM NEAR AGATE...OR ABOUT 20 MILES NORTHWEST
OF LIMON...MOVING EAST/NORTHEAST AT 10 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE AGATE
THIS STORM WILL PRODUCE HAIL UP TO 1 INCH IN DIAMETER. MOVE INSIDE
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
LAT...LON 3948 10403 3944 10400 3944 10375 3955 10374
3954 10396
BARJENBRUCHWhat 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, May 8, 11:30 AM MDT, 2 hours 25 minutes before
COZ0048>049-081815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 1130 AM MDT FRI MAY 8 1998 ...FUNNEL CLOUDS REPORTED ACROSS EXTREME NORTHERN WASHINGTON COUNTY... SEVERAL FUNNEL CLOUDS WERE REPORTED JUST NORTH OF THE AKRON AREA AT 1120 AM. A LINE OF THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHERN WASHINGTON COUNTY...AND EXTENDING INTO SOUTHEASTERN LOGAN COUNTY. HEAVY RAIN...SMALL HAIL...AND BRIEF FUNNEL CLOUDS ARE LIKELY WITH THIS DEVELOPING LINE OF STORMS. IF THREATENING WEATHER APPROACHES YOUR LOCATION MOVE INSIDE AND SEEK SHELTER IMMEDIATELY. ENTREKIN
Special weather statement, May 8, 11:30 AM MDT, 2 hours 25 minutes before
COZ0048>049-081815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER COLORADO 1130 AM MDT FRI MAY 8 1998 ...FUNNEL CLOUDS REPORTED ACROSS EXTREME NORTHERN WASHINGTON COUNTY... SEVERAL FUNNEL CLOUDS WERE REPORTED JUST NORTH OF THE AKRON AREA AT 1120 AM. A LINE OF THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHERN WASHINGTON COUNTY...AND EXTENDING INTO SOUTHEASTERN LOGAN COUNTY. HEAVY RAIN...SMALL HAIL...AND BRIEF FUNNEL CLOUDS ARE LIKELY WITH THIS DEVELOPING LINE OF STORMS. IF THREATENING WEATHER APPROACHES YOUR LOCATION MOVE INSIDE AND SEEK SHELTER IMMEDIATELY. ENTREKIN
Special weather statement, May 8, 11:46 AM MDT, 2 hours 9 minutes before
COZ030-032>050-090600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1146 AM MDT FRI MAY 8 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: AN UNSTABLE MOIST ATMOSPHERE OVER THE FORECAST AREA TODAY WILL HELP PRODUCE FAIRLY WIDESPREAD SHOWERS AND THUNDERSTORMS OVER MUCH OF NORTHEAST COLORADO. ALREADY...SHOWERS AND THUNDERSTORMS WERE DEVELOPING ALONG A SURFACE BOUNDARY RUNNING PARALLEL BUT SOUTH ABOUT 30 MILES OF INTERSTATE 76 ACROSS THE NORTHEAST COUNTIES OF COLORADO. THE LOCATION AND MOVEMENT OF THIS BOUNDARY IS SOMEWHAT UNCERTAIN THROUGH THE AFTERNOON INTO THE EVENING HOURS. AREAS NORTH OF IT SHOULD NOT HAVE ENOUGH SUNSHINE TO DEVELOP VERY STRONG THUNDERSTORMS...BUT WIDESPREAD PRECIPITATION WILL OCCUR JUST THE SAME. AREAS NEAR THE BOUNDARY AND TO ITS SOUTH WILL HAVE MORE HEATING AND A BETTER CHANCE OF STRONGER STORMS. SHOWERS AND THUNDERSTORMS WILL BE LIKELY BY EARLY AFTERNOON NORTH OF LINE FROM NORTHERN DOUGLAS COUNTY ALONG I-76. SOUTH OF THE THERE...SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP BY 3 PM. THE HIGHEST THREAT OF SEVERE THUNDERSTORMS WILL BE SOUTH OF THIS BOUNDARY. LARGE HAIL AND ISOLATED TORNADOES WILL BE A THREAT...WITH HEAVY RAINS A GOOD BET IN MOST AREAS....ESPECIALLY LATE AFTERNOON AND EVENING. SPOTTER ACTIVATION MAY NEED TO BE INITIATED BY EARLY AFTERNOON. RJK
Special weather statement, May 8, 12:35 PM MDT, 1 hour 20 minutes before
COZ041-045-046-048-049-090-082000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1235 PM MDT FRI MAY 8 1998 ...LINE OF STRONG THUNDERSTORMS DEVELOPING... ...SHORT LIVED TORNADOES POSSIBLE THROUGH 2 PM... AT 1232 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM SOUTHEASTERN LOGAN COUNTY THROUGH AKRON AND THEN TO JOLLY RANCH...KIOWA...AND CASTLE ROCK. THIS LINE WAS MOVING SLOWLY SOUTHEAST AT 10 MILES PER HOUR. PERSONS IN OR NEAR AGATE...AKRON...BURDETT...CLARKVILLE...ELBA... ELIZABETH...FRANKTOWN...JOLLY RANCH...KIOWA...LAST CHANCE...LONE STAR...OTIS...PLATNER...PONDEROSA PARK AND WOODLIN SCHOOL SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. THESE STORMS MAY PRODUCE A BRIEF TORNADO...ALONG WITH DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS. BARJENBRUCH
Special weather statement, May 8, 12:35 PM MDT, 1 hour 20 minutes before
COZ041-045-046-048-049-090-082000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1235 PM MDT FRI MAY 8 1998 ...LINE OF STRONG THUNDERSTORMS DEVELOPING... ...SHORT LIVED TORNADOES POSSIBLE THROUGH 2 PM... AT 1232 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM SOUTHEASTERN LOGAN COUNTY THROUGH AKRON AND THEN TO JOLLY RANCH...KIOWA...AND CASTLE ROCK. THIS LINE WAS MOVING SLOWLY SOUTHEAST AT 10 MILES PER HOUR. PERSONS IN OR NEAR AGATE...AKRON...BURDETT...CLARKVILLE...ELBA... ELIZABETH...FRANKTOWN...JOLLY RANCH...KIOWA...LAST CHANCE...LONE STAR...OTIS...PLATNER...PONDEROSA PARK AND WOODLIN SCHOOL SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. THESE STORMS MAY PRODUCE A BRIEF TORNADO...ALONG WITH DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS. BARJENBRUCH
Special weather statement, May 8, 1:03 PM MDT, 52 minutes before
COZ040-081945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 103 PM MDT FRI MAY 8 1998 ...THUNDERSTORM MOVING INTO DENVER... AT 1255 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 5 MILES NORTHWEST OF CHATFIELD RESERVOIR...OR ABOUT 14 MILES SOUTHWEST OF DENVER...MOVING EAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR DENVER...ENGLEWOOD...SOUTHEASTERN LAKEWOOD... LITTLETON...CHATFIELD RESERVOIR...AND GREENWOOD VILLAGE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. THIS STORM WILL PRODUCE A LOT OF SMALL HAIL...HEAVY RAIN...AND GUSTY WINDS UP TO 35 MPH. BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 2:10 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 50 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1998Every severe thunderstorm warning 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.