Alert archive / Colorado / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

April 19, 2005Larimer County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Apr 19, 2005, 4:13 PM MDT for Larimer County, Colorado. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 19, 2005, 4:13 PM MDT (22:13 UTC)
Expired
Apr 19, 2005, 5:06 PM MDT
In force
53 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Larimer County, CO

The radar

The Cheyenne radar (KCYS), 37 km from the middle of the area, began a volume at 22:14 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.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.2 hours before the alert went out and 203 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2005-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2005-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -62 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1796 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-62 m²/s²
0-3 km storm-relative helicity
-3 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 
WUUS55 KBOU 192213
SVRBOU
COC069-192300-
/O.NEW.KBOU.SV.W.0013.050419T2213Z-050419T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
413 PM MDT TUE APR 19 2005

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LARIMER COUNTY IN NORTH CENTRAL COLORADO

* UNTIL 500 PM MDT

* AT 407 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
  OVER NORTHEASTERN LARIMER COUNTY...OR ABOUT 24 MILES SOUTHWEST OF
  CHEYENNE...MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
  WARNED COUNTY.

LAT...LON 4085 10528 4083 10504 4111 10493 4115 10528

$$
ET
2 follow-up statements
000 
WWUS55 KBOU 192241
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
441 PM MDT TUE APR 19 2005

COC069-192300-
/O.CON.KBOU.SV.W.0013.000000T0000Z-050419T2300Z/
LARIMER CO-
441 PM MDT TUE APR 19 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 500 PM MDT FOR
NORTHEASTERN LARIMER COUNTY...

AT 436 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED OVER EXTREME NORTHEASTERN LARIMER
COUNTY...OR ABOUT 17 MILES SOUTHWEST OF CHEYENNE...MOVING EAST AT 25
MPH.

THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
WARNED COUNTY.

LAT...LON 4085 10528 4083 10504 4111 10493 4115 10528

$$
ET
000 
WWUS55 KBOU 192306
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
505 PM MDT TUE APR 19 2005

COC069-192315-
/O.EXP.KBOU.SV.W.0013.000000T0000Z-050419T2300Z/
LARIMER CO-
505 PM MDT TUE APR 19 2005

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LARIMER COUNTY
EXPIRED AT 500 PM MDT...

A NEW WARNING FOR NORTHEAST LARIMER AND NORTHWEST WELD COUNTIES IS 
IN EFFECT UNTIL 545 PM MDT.

LAT...LON 4085 10528 4083 10504 4111 10493 4115 10528

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 3:39 PM MDTSevere Thunderstorm WarningBOULogan51 min
Apr 19, 3:51 PM MDTSevere Thunderstorm WarningBOUElbert39 min
Apr 19, 3:59 PM MDTTornado WarningBOULogan31 min
Apr 19, 4:33 PM MDTSevere Thunderstorm WarningBOUBroomfield, Jefferson30 min
Apr 19, 4:35 PM MDTSevere Thunderstorm WarningBOULogan55 min
Apr 19, 4:45 PM MDTSevere Thunderstorm WarningBOUAdams, Denver, Weld45 min
Apr 19, 4:54 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert52 min
Apr 19, 4:55 PM MDTSevere Thunderstorm WarningBOULarimer, Weld54 min
Apr 19, 5:00 PM MDTSevere Thunderstorm WarningBOUAdams, Jefferson34 min
Apr 19, 5:32 PM MDTSevere Thunderstorm WarningBOUAdams, Broomfield, Weld34 min
Apr 19, 5:43 PM MDTSevere Thunderstorm WarningBOUArapahoe47 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2005Every severe thunderstorm warning in 2005

Sources

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