Alert archive / Colorado / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

May 22, 2008Larimer County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 22, 2008, 12:46 PM MDT for Larimer County, Colorado. It was in force for 44 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
May 22, 2008, 12:46 PM MDT (18:46 UTC)
Expired
May 22, 2008, 1:30 PM MDT
In force
44 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon

County Larimer County, CO

The radar

The Cheyenne radar (KCYS), 51 km from the middle of the area, began a volume at 18:45 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 watch it was issued in

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

IssuedProductOfficeLasted
May 22, 11:25 AM MDTTornado WatchSPC9 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 6.8 hours before the alert went out and 201 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 2008-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 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 2008-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -103 square meters per square second.1939587897117Sfc1 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
392 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
-103 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KBOU 221846
SVRBOU
COC069-221930-
/O.NEW.KBOU.SV.W.0013.080522T1846Z-080522T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1246 PM MDT THU MAY 22 2008

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 130 PM MDT

* AT 1246 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 2 MILES
  SOUTHEAST OF TEDS PLACE...OR 9 MILES NORTHWEST OF FORT COLLINS...
  MOVING NORTHWEST AT 36 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VIRGINIA
  DALE...TEDS PLACE...LIVERMORE AND BELLVUE.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4068 10502 4061 10524 4100 10557 4100 10555
      4101 10505
TIME...MOT...LOC 1846Z 146DEG 31KT 4071 10519

$$
2 follow-up statements
000 
WWUS55 KBOU 221904
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
104 PM MDT THU MAY 22 2008

COC069-221930-
/O.CON.KBOU.SV.W.0013.000000T0000Z-080522T1930Z/
LARIMER CO-
104 PM MDT THU MAY 22 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM MDT
FOR NORTH CENTRAL LARIMER COUNTY...

AT 104 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 4 MILES NORTHWEST OF LIVERMORE...OR 22 MILES NORTHWEST OF
FORT COLLINS...MOVING NORTHWEST AT 36 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
VIRGINIA DALE...TEDS PLACE AND LIVERMORE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4068 10502 4061 10524 4100 10557 4100 10555
      4101 10505
TIME...MOT...LOC 1904Z 146DEG 31KT 4084 10531

$$
000 
WWUS55 KBOU 221928
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
128 PM MDT THU MAY 22 2008

COC069-221937-
/O.EXP.KBOU.SV.W.0013.000000T0000Z-080522T1930Z/
LARIMER CO-
128 PM MDT THU MAY 22 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LARIMER COUNTY
WILL EXPIRE AT 130 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. A 
SEVERE THUNDERSTORM WARNING CONTINUES FOR PARTS OF LARIMER COUNTY 
UNTIL 200 PM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT THURSDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4068 10502 4061 10524 4100 10557 4100 10555
      4101 10505
TIME...MOT...LOC 1927Z 146DEG 31KT 4100 10546

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 6:21 PM MDTSevere Thunderstorm WarningBOUWashington24 min
May 21, 7:08 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Phillips, Sedgwick, Washington52 min
May 21, 8:04 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Phillips, Sedgwick, Washington56 min
May 21, 9:44 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert46 min
May 22, 1:48 AM MDTAreal Flood AdvisoryBOULarimer87 min
May 22, 11:09 AM MDTSevere Thunderstorm WarningBOULarimer, Weld51 min
May 22, 11:18 AM MDTTornado WarningBOUWeld42 min
May 22, 11:35 AM MDTTornado WarningBOULarimer, Weld25 min
May 22, 11:53 AM MDTTornado WarningBOULarimer, Weld22 min
May 22, 12:13 PM MDTTornado WarningBOULarimer32 min
May 22, 12:24 PM MDTTornado WarningBOUBoulder, Weld36 min
May 22, 12:49 PM MDTSevere Thunderstorm WarningBOULarimer30 min
May 22, 1:00 PM MDTTornado WarningBOUWashington30 min
May 22, 1:14 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington, Weld31 min
May 22, 1:22 PM MDTSevere Thunderstorm WarningBOULarimer38 min
May 22, 2:34 PM MDTSevere Thunderstorm WarningBOULogan, Sedgwick26 min
May 22, 3:05 PM MDTSevere Thunderstorm WarningBOUWeld55 min
May 22, 3:06 PM MDTAreal Flood AdvisoryBOULarimer3 hr
May 22, 3:20 PM MDTTornado WarningBOUWeld40 min
May 22, 3:29 PM MDTTornado WarningBOUWeld46 min
May 22, 5:44 PM MDTSevere Thunderstorm WarningBOULogan, Phillips, Sedgwick28 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2008Every severe thunderstorm warning in 2008

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.