Alert archive / Colorado / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 66, NWS Denver/Boulder, CO

June 3, 1998Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 3, 1998, 12:29 AM MDT for Lincoln County, Washington County, Colorado. It was in force for 46 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 3, 1998, 12:29 AM MDT (06:29 UTC)
Expired: Jun 3, 1998, 1:15 AM MDT
In force: 46 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 101 km from the middle of the area, began a volume at 06:28 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 3, 12:51 AM MDT	Thunderstorm Wind 52	Lindon, 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 6.5 hours before the alert went out and 282 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2185 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

859 
WUUS1 KDEN 030633 RRA
SVRDEN
COC073-121-030715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1229 AM MDT WED JUN 3 1998

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
     EXTREME NORTHERN LINCOLN COUNTY IN EAST CENTRAL COLORADO
     SOUTHWESTERN WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 115 AM MDT

* AT 1228 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS ENTERING EXTREME WESTERN WASHINGTON 
  AND NORTHWEST LINCOLN COUNTIES...OR FROM 25 MILES SOUTHWEST OF 
  AKRON TO 10 MILES NORTH OF LIMON...MOVING EAST AT 35 MILES PER HOUR.

THESE THUNDERSTORMS COULD PRODUCE WIND GUSTS IN EXCESS OF 70 MPH...
AS WELL AS HAIL CLOSE TO 1 INCH IN DIAMETER.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3999 10370 3940 10371 3940 10318 3957 10316
          3958 10298 4002 10312

BARJENBRUCH

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 12:20 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Elbert	25 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1998 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.