Alert archive / Colorado / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 9, NWS Denver/Boulder, CO

June 3, 2002Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 3, 2002, 3:58 PM MDT for Weld County, Colorado. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 3, 2002, 3:58 PM MDT (21:58 UTC)
Expired: Jun 3, 2002, 5:00 PM MDT
In force: 62 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

County Weld County, CO

The radar

The Denver radar (KFTG), 48 km from the middle of the area, began a volume at 22:02 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, 4:15 PM MDT	Hail 1	Ft Lupton, 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 3, 2:00 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.0 hours before the alert went out and 115 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: 7 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1224 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: 263 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.

231 
WUUS55 KBOU 032158
SVRDEN
COC123-032300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
356 PM MDT MON JUN 3 2002

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 500 PM MDT

* AT 356 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHEAST OF MILTON RESERVOIR...OR
  ABOUT 18 MILES SOUTHEAST OF GREELEY...MOVING NORTHEAST AT 20 MPH.
  ANOTHER SEVERE THUNDERSTORM WAS NEAR BRIGHTON MOVING NORTHEAST.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...HUDSON...
KEENESBURG...LOCHBUIE...MILTON RESERVOIR...PROSPECT VALLEY...
RIVERSIDE RESERVOIR AND ROGGEN.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT MONDAY EVENING FOR
NORTHEASTERN COLORADO.

VERY LARGE HAIL 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.

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 IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

THE WARNING FOR CENTRAL WELD COUNTY HAS EXPIRED.  THE STORM EAST OF 
GALETON AND CORNISH HAS WEAKENED.

LAT...LON 4023 10466 4000 10483 4000 10450 4009 10428
          4050 10415 4047 10440

GIMMESTAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 1:28 PM MDT	Tornado Warning	BOU	Elbert	47 min
Jun 3, 2:13 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	47 min
Jun 3, 2:25 PM MDT	Severe Thunderstorm Warning	BOU	Douglas	50 min
Jun 3, 2:49 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	41 min
Jun 3, 2:57 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	48 min
Jun 3, 3:07 PM MDT	Severe Thunderstorm Warning	BOU	Douglas	38 min
Jun 3, 3:08 PM MDT	Severe Thunderstorm Warning	BOU	Weld	52 min
Jun 3, 3:15 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	45 min
Jun 3, 3:29 PM MDT	Tornado Warning	BOU	Lincoln	46 min
Jun 3, 3:48 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	42 min
Jun 3, 4:00 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	45 min
Jun 3, 4:06 PM MDT	Severe Thunderstorm Warning	BOU	Weld	54 min
Jun 3, 4:51 PM MDT	Tornado Warning	BOU	Morgan	39 min
Jun 3, 5:23 PM MDT	Tornado Warning	BOU	Morgan	37 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2002 Every severe thunderstorm warning in 2002

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.