Alert archive / Colorado / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 4, NWS Denver/Boulder, CO

May 8, 1996Adams County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 8, 1996, 8:03 PM MDT for Adams County, Weld County, Colorado. It was in force for 42 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 8, 1996, 8:03 PM MDT (02:03 UTC)
Expired: May 8, 1996, 8:45 PM MDT
In force: 42 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Adams County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 50 km from the middle of the area, began a volume at 02:06 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
May 8, 8:03 PM MDT	Hail 1	Lochbuie, CO
May 8, 8:06 PM MDT	Hail 2	Lochbuie, CO
May 8, 8:20 PM MDT	Thunderstorm Wind 51	Keenseburg, 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

Denver, CO (KDNR), launched 00:00Z, 2.1 hours before the alert went out and 104 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: 1808 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 2066 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDEN 090205
SVRDEN
COC001-123-090245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
803 PM MDT WED MAY 08 1996

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 845 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN NORTHEASTERN COLORADO
     NORTHWESTERN ADAMS AND CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     BARNESVILLE...BRIGGSDALE...BRIGHTON...EATON...EVANS...FORT
     LUPTON...GALETON...GARDEN CITY...GILCREST...GILL...GREELEY
     ...HUDSON...KEENESBURG...KEOTA...KERSEY...LA SALLE...
     LOCHBUIE...LUCERNE...MILTON RESERVOIR...PECKHAM...PROSPECT
     VALLEY...PURCELL...RIVERSIDE RESERVOIR AND ROGGEN

AT 803 PM MDT 3/4 INCH TO 1 INCH-SIZE HAIL HAS REPORTED AT LOCHBUIE.
...OR ABOUT 25 MILES SOUTH OF GREELEY.

THE STORM WAS MOVING TOWARD THE EAST SOUTHEAST AT 20 MPH.

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.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.

HOLZINGER

LAT...LON 3993 10440 3996 10488 4087 10460 4081 10402

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 7:15 PM MDT	Severe Thunderstorm Warning	BOU	Logan	45 min
May 8, 8:55 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Weld	50 min
May 8, 10:15 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	45 min
May 8, 11:10 PM MDT	Severe Thunderstorm Warning	BOU	Phillips, Sedgwick	50 min
May 9, 2:15 AM MDT	Severe Thunderstorm Warning	BOU	Logan	45 min
May 9, 2:20 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	25 min
May 9, 2:50 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	25 min
May 9, 3:16 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	14 min
May 9, 3:36 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	24 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1996 Every severe thunderstorm warning in 1996

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.