Alert archive / Colorado / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 8, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 5, 2012, 9:56 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 49 min. 4 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
- May 5, 2012, 9:56 PM MDT (03:56 UTC)
- Expired
- May 5, 2012, 10:45 PM MDT
- In force
- 49 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Adams County, CO, Arapahoe County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 16 km from the middle of the area, began a volume at 03:57 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 | Remark |
|---|---|---|---|
| May 5, 10:00 PM MDT | HAIL 1 | 2 Sw Buckley Afb, CO | |
| May 5, 10:00 PM MDT | HAIL 1 | 2 W Aurora, CO | |
| May 5, 10:01 PM MDT | HAIL 1.5 | 2 Sw Buckley Afb, CO | |
| May 5, 10:06 PM MDT | HAIL 1 | 3 Ssw Buckley Afb, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 3.9 hours before the alert went out and 129 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.
- Mixed-layer CAPE
- 102 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 3786 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852 WUUS55 KBOU 060356 SVRBOU COC001-005-031-060445- /O.NEW.KBOU.SV.W.0008.120506T0356Z-120506T0445Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DENVER CO 956 PM MDT SAT MAY 5 2012 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO CENTRAL ADAMS COUNTY IN NORTHEAST COLORADO EASTERN DENVER COUNTY IN NORTHEAST COLORADO * UNTIL 1045 PM MDT * AT 956 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL. THIS STORM WAS LOCATED OVER EXTREME WESTERN AURORA...OR 6 MILES SOUTHEAST OF DENVER...MOVING EAST AT 25 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO D.I.A. TERMINAL AND CONCOURSES...BUCKLEY AFB...WATKINS...MANILA VILLAGE... DENVER INTERNATIONAL AIRPORT...EASTERN DENVER...NORTHEASTERN COMMERCE CITY AND AURORA. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3994 10472 3970 10440 3962 10484 3975 10501 TIME...MOT...LOC 0356Z 254DEG 20KT 3969 10483 WIND...HAIL <50MPH 1.00IN $$
2 follow-up statements
762 WWUS55 KBOU 060414 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1014 PM MDT SAT MAY 5 2012 COC001-005-031-060445- /O.CON.KBOU.SV.W.0008.000000T0000Z-120506T0445Z/ ARAPAHOE CO-ADAMS CO-DENVER CO- 1014 PM MDT SAT MAY 5 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT FOR EASTERN DENVER...CENTRAL ADAMS AND CENTRAL ARAPAHOE COUNTIES... AT 1012 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL. THIS STORM WAS LOCATED 2 MILES NORTH OF BUCKLEY AFB...OR 12 MILES EAST OF DENVER...MOVING EAST AT 25 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO D.I.A. TERMINAL AND CONCOURSES...BUCKLEY AFB...WATKINS...MANILA VILLAGE...DENVER INTERNATIONAL AIRPORT...NORTHEASTERN CENTENNIAL... EASTERN DENVER...NORTHEASTERN COMMERCE CITY AND AURORA. NUMEROUS REPORTS OF HAIL AROUND ONE INCH IN DIAMETER HAVE BEEN REPORTED WITH THIS STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. && LAT...LON 3994 10472 3970 10440 3962 10484 3975 10501 TIME...MOT...LOC 0412Z 248DEG 20KT 3973 10473 WIND...HAIL <50MPH 1.00IN $$
855 WWUS55 KBOU 060444 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1044 PM MDT SAT MAY 5 2012 COC001-005-031-060454- /O.EXP.KBOU.SV.W.0008.000000T0000Z-120506T0445Z/ ARAPAHOE CO-ADAMS CO-DENVER CO- 1044 PM MDT SAT MAY 5 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DENVER...CENTRAL ADAMS AND CENTRAL ARAPAHOE COUNTIES WILL EXPIRE AT 1045 PM MDT... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. LAT...LON 3994 10472 3970 10440 3962 10484 3975 10501 TIME...MOT...LOC 0444Z 248DEG 20KT 3980 10452 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 6:32 PM MDT | Tornado Warning | BOU | Logan | 43 min |
| May 5, 7:39 PM MDT | Special Weather Statement | BOU | Weld | 51 min |
| May 5, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 25 min |
| May 5, 9:29 PM MDT | Special Weather Statement | BOU | Denver | 46 min |
| May 5, 10:39 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Weld | 51 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2012Every severe thunderstorm warning in 2012
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.