Alert archive / Colorado / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 21, NWS Denver/Boulder, CO

May 25, 2006Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 25, 2006, 9:13 PM MDT for Weld County, Colorado. It was in force for 47 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
May 25, 2006, 9:13 PM MDT (03:13 UTC)
Expired
May 25, 2006, 10:00 PM MDT
In force
47 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), 85 km from the middle of the area, began a volume at 03:12 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

TimeReportWhereRemark
May 25, 9:28 PM MDTTSTM WND GST 6014 E Grover, CODAVIS WEATHER INSTRUMENT MEASUREMENT

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 288 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, N. Platte/Lee Bi, NE at 00:00Z on 2006-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2006-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 square meters per square second.193958Sfc1 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
3058 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
55 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 260315
SVRBOU
COC123-260400-
/O.NEW.KBOU.SV.W.0021.060526T0313Z-060526T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
913 PM MDT THU MAY 25 2006

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 1000 PM MDT

* AT 913 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
  SOUTH OF KEOTA...OR ABOUT 26 MILES NORTHWEST OF FORT MORGAN...
  MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STONEHAM...
  PAWNEE BUTTES...NEW RAYMER AND KEOTA.

THIS WARNING REPLACES THE EARLIER WARNING FOR CENTRAL WELD COUNTY 
ISSUED AT 834 PM.

THIS STORM HAS HAD A HISTORY OF STRONG WINDS UP TO 70 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 IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

LAT...LON 4053 10420 4053 10364 4096 10363 4098 10423

$$

SWE
2 follow-up statements
000 
WWUS55 KBOU 260342
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
941 PM MDT THU MAY 25 2006

COC123-260400-
/O.CON.KBOU.SV.W.0021.000000T0000Z-060526T0400Z/
WELD CO-
941 PM MDT THU MAY 25 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM MDT
FOR NORTHEASTERN WELD COUNTY...

AT 941 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 4 MILES EAST OF PAWNEE
BUTTES...OR ABOUT 38 MILES NORTH OF FORT MORGAN...MOVING NORTHEAST AT
35 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
STONEHAM...PAWNEE BUTTES...NEW RAYMER AND KEOTA.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS UP TO 70 
MPH. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS

LAT...LON 4053 10420 4053 10364 4096 10363 4098 10423

$$

SWE
000 
WWUS55 KBOU 260359
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
959 PM MDT THU MAY 25 2006

COC123-260409-
/O.EXP.KBOU.SV.W.0021.000000T0000Z-060526T0400Z/
WELD CO-
959 PM MDT THU MAY 25 2006

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WELD COUNTY
EXPIRED AT 1000 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO 
LONGER EXPECTED TO PRODUCE SEVERE WEATHER. BRIEF HEAVY RAIN AND WIND 
GUSTS TO 40 MPH CAN STILL BE EXPECTED ACROSS NORTHEAST WELD COUNTY. 

LAT...LON 4053 10420 4053 10364 4096 10363 4098 10423

$$
SWE

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 7:39 PM MDTSevere Thunderstorm WarningBOUWeld66 min
May 25, 8:34 PM MDTSevere Thunderstorm WarningBOUWeld41 min
May 26, 4:10 AM MDTRed Flag WarningBOUAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more17 hr
May 26, 2:21 PM MDTTornado WarningBOUElbert39 min
May 26, 3:00 PM MDTTornado WarningBOUElbert45 min
May 26, 3:43 PM MDTFire Weather WatchBOUAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 15 more12 hr

Nearby

Severe Thunderstorm Warnings in Colorado, 2006Every severe thunderstorm warning in 2006

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.