Alert archive / Colorado / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 71, NWS Denver/Boulder, CO

May 24, 2005Arapahoe County, Elbert County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 24, 2005, 1:30 PM MDT for Arapahoe County, Elbert County, Colorado. It was in force for 45 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 24, 2005, 1:30 PM MDT (19:30 UTC)
Expired: May 24, 2005, 2:15 PM MDT
In force: 45 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

Counties Arapahoe County, CO, Elbert County, CO

The radar

The Denver radar (KFTG), 27 km from the middle of the area, began a volume at 19:33 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 24, 12:45 PM MDT	Tornado Watch	SPC	7 hr
May 24, 1:10 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 7.5 hours before the alert went out and 109 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: 73 J/kg
Mixed-layer CIN: -398 J/kg
Mixed-layer LCL: 1712 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KBOU 241930
SVRBOU
COC005-039-242015-
/O.NEW.KBOU.SV.W.0071.050524T1930Z-050524T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
130 PM MDT TUE MAY 24 2005

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ELBERT COUNTY IN EAST CENTRAL COLORADO
  CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO

* UNTIL 215 PM MDT

* AT 128 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 9 MILES NORTHEAST OF PONDEROSA PARK...OR ABOUT 26
  MILES SOUTHEAST OF DENVER...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PONDEROSA
  PARK...ELIZABETH...COUNTRY GARDENS AND BYERS.

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

LAT...LON 3957 10464 3934 10464 3941 10426 3973 10400
      3973 10447

$$

RJK

2 follow-up statements

000 
WWUS55 KBOU 241949
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
149 PM MDT TUE MAY 24 2005

COC005-039-242015-
/O.CON.KBOU.SV.W.0071.000000T0000Z-050524T2015Z/
ELBERT CO-ARAPAHOE CO-
149 PM MDT TUE MAY 24 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 215 PM MDT FOR
CENTRAL ARAPAHOE AND NORTH CENTRAL ELBERT COUNTIES...

AT 148 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED 8 MILES
SOUTHWEST OF COUNTRY GARDENS...OR ABOUT 33 MILES EAST OF DENVER...
MOVING NORTHEAST AT 30 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
STRASBURG...COUNTRY GARDENS AND BYERS.

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

LAT...LON 3959 10455 3936 10453 3941 10426 3973 10400
      3973 10447

$$

RJK

000 
WWUS55 KBOU 242011
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
212 PM MDT TUE MAY 24 2005

COC005-039-242022-
/O.EXP.KBOU.SV.W.0071.000000T0000Z-050524T2015Z/
ELBERT CO-ARAPAHOE CO-
212 PM MDT TUE MAY 24 2005

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ARAPAHOE AND NORTH
CENTRAL ELBERT COUNTIES EXPIRED AT 215 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO
LONGER EXPECTED TO PRODUCE SEVERE WEATHER.

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

LAT...LON 3959 10455 3936 10453 3941 10426 3973 10400
      3973 10447

$$

RJK

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, May 24, 10:43 AM MDT, 2 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1043 AM MDT TUE MAY 24 2005

COZ030>051-251200-
JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND
COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000
FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST
GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/
SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND
BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST
DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK
COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER
COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON
COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS
COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/
EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES
ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD
COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS
COUNTY-
1043 AM MDT TUE MAY 24 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

A FEW THUNDERSTORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING
OVER THE URBAN CORRIDOR AND NORTHEASTERN PLAINS OF COLORADO.
ADEQUATE MOISTURE...SHEAR AND INSTABILITY WILL BE PRESENT FOR
POSSIBLE SUPERCELL THUNDERSTORM DEVELOPMENT WHICH MAY PRODUCE LARGE
HAIL...DAMAGING WINDS AND ISOLATED TORNADOES.

IN ADDITION TO THE STORMS GENERATING ALONG THE EASTERN SLOPES OF THE
MOUNTAINS...A BAND OF SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
OVER AND NEAR THE NORTHERN BORDER OF COLORADO AT MIDDAY WILL SERVE
AS A FOCUS FOR FURTHER THUNDERSTORM DEVELOPMENT THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED DURING THIS AFTERNOON AND INTO THE
EARLY EVENING.

GARD/ENTREKIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 1:29 PM MDT	Severe Thunderstorm Warning	BOU	Adams	23 min
May 24, 2:13 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	62 min
May 24, 2:27 PM MDT	Tornado Warning	BOU	Logan, Morgan, Weld	48 min
May 24, 2:51 PM MDT	Tornado Warning	BOU	Morgan, Washington	39 min
May 24, 3:26 PM MDT	Tornado Warning	BOU	Washington	49 min
May 24, 4:15 PM MDT	Severe Thunderstorm Warning	BOU	Washington	24 min
May 24, 5:24 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Jefferson	32 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2005 Every 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.