Alert archive / Colorado / Tornado Warnings in 2016

Tornado Warning 26, NWS Denver/Boulder, CO

September 2, 2016Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Sep 2, 2016, 4:07 PM MDT for Washington County, Colorado. It was in force for 23 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
Sep 2, 2016, 4:07 PM MDT (22:07 UTC)
Expired
Sep 2, 2016, 4:30 PM MDT
In force
23 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Observed
Hail
1.0 in

County Washington County, CO

The radar

The Goodland radar (KGLD), 141 km from the middle of the area, began a volume at 22:06 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 nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.1 hours before the alert went out and 58 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 2016-09-02Temperature 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, Denver, CO at 12:00Z on 2016-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
2206 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

755 
WFUS55 KBOU 022207
TORBOU
COC121-022230-
/O.NEW.KBOU.TO.W.0026.160902T2207Z-160902T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
407 PM MDT FRI SEP 2 2016

THE NATIONAL WEATHER SERVICE IN DENVER COLORADO HAS ISSUED A

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

* UNTIL 430 PM MDT

* AT 407 PM MDT...A CONFIRMED TORNADO WAS LOCATED 6 MILES SOUTH OF
  LONE STAR...OR 11 MILES NORTHWEST OF YUMA...MOVING EAST AT 15 MPH.

  HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

  SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO. 

  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. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  EASTERN WASHINGTON COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4035 10279 4020 10280 4020 10288 4029 10293
      4036 10278
TIME...MOT...LOC 2207Z 284DEG 13KT 4026 10285 

TORNADO...OBSERVED
HAIL...1.00IN

$$

RTG
1 follow-up statement
040 
WWUS55 KBOU 022223
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
423 PM MDT FRI SEP 2 2016

COC121-022233-
/O.EXP.KBOU.TO.W.0026.000000T0000Z-160902T2230Z/
WASHINGTON CO-
423 PM MDT FRI SEP 2 2016

...THE TORNADO WARNING FOR EASTERN WASHINGTON COUNTY WILL EXPIRE AT
430 PM MDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4035 10279 4020 10280 4020 10288 4029 10293
      4036 10278
TIME...MOT...LOC 2221Z 284DEG 13KT 4026 10285 

$$

RTG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 3:02 PM MDTSpecial Weather StatementBOUWashington43 min
Sep 2, 3:09 PM MDTSpecial Weather StatementBOULogan51 min
Sep 2, 3:46 PM MDTSevere Thunderstorm WarningBOUWashington44 min
Sep 2, 4:00 PM MDTSevere Thunderstorm WarningBOULogan45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.