Alert archive / Colorado / Tornado Warnings in 2004

Tornado Warning 37, NWS Denver/Boulder, CO

July 29, 2004Morgan County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 29, 2004, 3:39 PM MDT for Morgan County, Washington County, Colorado. It was in force for 41 min. 3 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: Jul 29, 2004, 3:39 PM MDT (21:39 UTC)
Expired: Jul 29, 2004, 4:20 PM MDT
In force: 41 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

Counties Morgan County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 93 km from the middle of the area, began a volume at 21:43 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
Jul 29, 3:48 PM MDT	HAIL 0.75	5 Nw Woodrow, CO
Jul 29, 3:48 PM MDT	HAIL 0.75	5 Nw Woodrow, CO
Jul 29, 3:48 PM MDT	HAIL 0.75	5 Nw Woodrow, CO

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
Jul 29, 1:55 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.7 hours before the alert went out and 30 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: 10 J/kg
Mixed-layer CIN: -327 J/kg
Mixed-layer LCL: 1334 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 84 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.

000 
WFUS55 KBOU 292139
TORBOU
COC087-121-292220-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
339 PM MDT THU JUL 29 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MORGAN COUNTY IN NORTHEAST COLORADO
  CENTRAL WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 420 PM MDT

* AT 338 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 3 MILES SOUTHWEST OF GARY...OR
  ABOUT 18 MILES SOUTHEAST OF FORT MORGAN.  THE STORM WAS NEARLY
  STATIONARY.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...GARY AND
WOODROW.

THIS SEVERE THUNDERSTORM MAY ALSO BE PRODUCING HAIL UP TO 1 INCH IN 
DIAMETER AND VERY HEAVY RAINFALL.  

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE
IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3992 10363 3991 10331 4019 10329 4022 10346
      4010 10372

$$
BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 4:55 PM MDT	Severe Thunderstorm Warning	BOU	Washington	47 min
Jul 29, 4:56 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min
Jul 29, 5:28 PM MDT	Flash Flood Warning	BOU	Washington	3 hr
Jul 29, 5:29 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min
Jul 29, 5:49 PM MDT	Tornado Warning	BOU	Washington	56 min

Nearby

Tornado Warnings in Colorado, 2004 Every tornado warning in 2004 Tornadoes 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.