Alert archive / Colorado / Tornado Warnings in 2016

Tornado Warning 27, NWS Denver/Boulder, CO

September 3, 2016Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Sep 3, 2016, 6:26 PM MDT for Washington County, Colorado. It was in force for 34 min. 3 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
Sep 3, 2016, 6:26 PM MDT (00:26 UTC)
Expired
Sep 3, 2016, 7:00 PM MDT
In force
34 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Washington County, CO

The radar

The Denver radar (KFTG), 116 km from the middle of the area, began a volume at 00:25 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
Sep 3, 6:30 PM MDTHAIL 2.57 Se Akron, COSTRONG WIND AND HEAVY RAIN ALSO OBSERVED.
Sep 3, 6:40 PM MDTHAIL 22 Ssw Akron, COSTRONG WINDS ALSO REPORTED ALONG WITH TWO BRIEF FUNNEL CLOUDS.
Sep 3, 7:05 PM MDTHAIL 311 Se Akron, COROOF AND VEHICLE DAMAGE W/ 1.25 INCHES OF RAINFALL.

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

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.4 hours before the alert went out and 27 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 00:00Z on 2016-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 00:00Z on 2016-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
14 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
2768 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

664 
WFUS55 KBOU 040026
TORBOU
COC121-040100-
/O.NEW.KBOU.TO.W.0027.160904T0026Z-160904T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
626 PM MDT SAT SEP 3 2016

THE NATIONAL WEATHER SERVICE IN DENVER COLORADO HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 700 PM MDT
    
* AT 625 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES SOUTHWEST OF AKRON...MOVING EAST AT 10
  MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
           DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE
           DAMAGE IS LIKELY. 

* LOCATIONS IMPACTED INCLUDE...
  AKRON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN
A MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4006 10338 4021 10339 4024 10307 4001 10307
TIME...MOT...LOC 0025Z 271DEG 10KT 4013 10330 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MEIER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 6:07 PM MDTSpecial Weather StatementBOUMorgan38 min
Sep 3, 6:09 PM MDTSpecial Weather StatementBOUWashington51 min
Sep 3, 6:18 PM MDTSevere Thunderstorm WarningBOUWashington42 min
Sep 3, 6:27 PM MDTTornado WarningBOUWashington33 min
Sep 3, 7:00 PM MDTTornado WarningBOUWashington27 min
Sep 3, 7:35 PM MDTSpecial Weather StatementBOUWashington25 min
Sep 4, 2:10 AM MDTSpecial Weather StatementBOUSedgwick35 min
Sep 4, 4:05 PM MDTSpecial Weather StatementBOUBroomfield40 min
Sep 4, 4:12 PM MDTSevere Thunderstorm WarningBOUPhillips48 min
Sep 4, 4:28 PM MDTSpecial Weather StatementBOUWeld47 min
Sep 4, 4:42 PM MDTSevere Thunderstorm WarningBOUPhillips, Sedgwick29 min
Sep 4, 5:06 PM MDTSpecial Weather StatementBOUMorgan39 min
Sep 4, 5:27 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington48 min
Sep 4, 5:36 PM MDTTornado WarningBOUMorgan, Washington15 min
Sep 4, 5:55 PM MDTSevere Thunderstorm WarningBOULogan, Washington18 min

Nearby

Tornado Warnings in Colorado, 2016Every tornado warning in 2016Tornadoes in 2016

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.