Alert archive / Colorado / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 2, NWS Denver/Boulder, CO

May 10, 2004Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 10, 2004, 5:24 PM MDT for Weld County, Colorado. It was in force for 51 min. 13 reports 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: May 10, 2004, 5:24 PM MDT (23:24 UTC)
Expired: May 10, 2004, 6:15 PM MDT
In force: 51 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 39 km from the middle of the area, began a volume at 23:26 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
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 5:34 PM MDT	HAIL 2	6 N Nunn, CO
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE
May 10, 6:04 PM MDT	TORNADO	1 N Rockport, CO	NO DAMAGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 10, 3:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.4 hours before the alert went out and 162 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: 2424 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 40 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.

525 
WUUS55 KBOU 102324
SVRBOU
COC123-110015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
524 PM MDT MON MAY 10 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 615 PM MDT

* AT 524 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES SOUTHEAST OF ROCKPORT...OR ABOUT 24
  MILES SOUTH OF CHEYENNE...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
HEREFORD...NUNN AND ROCKPORT.

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 YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 4071 10491 4068 10463 4099 10416 4099 10480

$$

ENTREKIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 5:31 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	59 min
May 10, 5:55 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Larimer, Weld	65 min
May 10, 5:59 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Larimer, Weld	61 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.