Alert archive / Colorado / Tornado Warnings in 2016

Tornado Warning 30, NWS Denver/Boulder, CO

September 4, 2016Morgan County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Sep 4, 2016, 5:36 PM MDT for Morgan County, Washington County, Colorado. It was in force for 15 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 4, 2016, 5:36 PM MDT (23:36 UTC)
Expired
Sep 4, 2016, 5:51 PM MDT
In force
15 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.75 in

Counties Morgan County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 120 km from the middle of the area, began a volume at 23:36 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
Sep 4, 2:24 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.6 hours before the alert went out and 55 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 2016-09-04Temperature 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 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 2016-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939587897Sfc1 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
2233 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

446 
WFUS55 KBOU 042336
TORBOU
COC087-121-050000-
/O.NEW.KBOU.TO.W.0030.160904T2336Z-160905T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
536 PM MDT SUN SEP 4 2016

THE NATIONAL WEATHER SERVICE IN DENVER COLORADO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL WASHINGTON COUNTY IN NORTHEASTERN COLORADO...
  EAST CENTRAL MORGAN COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 600 PM MDT

* AT 534 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES EAST OF HILLROSE...OR 16 MILES
  NORTHWEST OF AKRON...MOVING EAST AT 20 MPH.

  HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

  SOURCE...LAW ENFORCEMENT AND WEATHER SPOTTERS REPORTED A FUNNEL
           CLOUD. 

  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...
  HILLROSE AND PREWITT RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU
CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST
RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA AND PROTECT YOURSELF FROM
FLYING DEBRIS.

&&

LAT...LON 4028 10319 4025 10353 4040 10356 4044 10339
      4043 10338 4043 10320
TIME...MOT...LOC 2334Z 260DEG 16KT 4033 10345 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

BAKER
1 follow-up statement
889 
WWUS55 KBOU 042351
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
551 PM MDT SUN SEP 4 2016

COC087-121-042359-
/O.CAN.KBOU.TO.W.0030.000000T0000Z-160905T0000Z/
WASHINGTON CO-MORGAN CO-
551 PM MDT SUN SEP 4 2016

...THE TORNADO WARNING FOR NORTH CENTRAL WASHINGTON AND EAST CENTRAL
MORGAN COUNTIES IS CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
LAW ENFORCEMENT TRAINED WEATHER SPOTTERS NO LONGER DETECT A FUNNEL
CLOUD WITH THIS STORM. 

THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER LARGE HAIL...
STRONG GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHEASTERN COLORADO.

LAT...LON 4028 10319 4025 10353 4040 10356 4044 10339
      4043 10338 4043 10320
TIME...MOT...LOC 2347Z 260DEG 16KT 4034 10336 

$$

BAKER

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, 6:26 PM MDTTornado WarningBOUWashington34 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, 5:55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.