Alert archive / Colorado / Tornado Warnings in 2013

Tornado Warning 45, NWS Denver/Boulder, CO

August 3, 2013Morgan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Aug 3, 2013, 2:41 PM MDT for Morgan County, Colorado. It was in force for 34 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
Aug 3, 2013, 2:41 PM MDT (20:41 UTC)
Expired
Aug 3, 2013, 3:15 PM MDT
In force
34 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.5 in

County Morgan County, CO

The radar

The Denver radar (KFTG), 80 km from the middle of the area, began a volume at 20:43 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
Aug 3, 2:35 PM MDTTornado WatchSPC6 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.7 hours before the alert went out and 46 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 2013-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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 12:00Z on 2013-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
46 J/kg
Mixed-layer CIN
-295 J/kg
Mixed-layer LCL
2189 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

279 
WFUS55 KBOU 032041
TORBOU
COC087-032115-
/O.NEW.KBOU.TO.W.0045.130803T2041Z-130803T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
241 PM MDT SAT AUG 3 2013

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MORGAN COUNTY IN NORTHEAST COLORADO...

* UNTIL 315 PM MDT
    
* AT 241 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES WEST OF GARY...OR 13 MILES SOUTHEAST OF
  FORT MORGAN...AND IS NEARLY STATIONARY.

  HAZARD...TORNADO AND PING PONG BALL SIZE HAIL. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO 
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS 
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS 
           LIKELY. 

* LOCATIONS IMPACTED INCLUDE...
  TWELVE-MILE CORNER...GARY AND ADENA SCHOOL. 

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 IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

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 4014 10385 4014 10347 4000 10347 4000 10384
TIME...MOT...LOC 2041Z 331DEG 2KT 4009 10368 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

COOPER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 7:01 PM MDTSpecial Weather StatementBOULarimer44 min
Aug 2, 10:05 PM MDTSpecial Weather StatementBOUMorgan40 min
Aug 3, 12:53 PM MDTSpecial Weather StatementBOUBoulder37 min
Aug 3, 1:35 PM MDTSevere Thunderstorm WarningBOUMorgan40 min
Aug 3, 1:44 PM MDTSevere Thunderstorm WarningBOULarimer46 min
Aug 3, 1:53 PM MDTTornado WarningBOUMorgan37 min
Aug 3, 1:57 PM MDTAreal Flood AdvisoryBOULarimer3 hr
Aug 3, 2:01 PM MDTTornado WarningBOUWashington29 min
Aug 3, 2:11 PM MDTTornado WarningBOUMorgan34 min
Aug 3, 2:15 PM MDTFlash Flood WarningBOUMorgan, Washington3 hr
Aug 3, 2:28 PM MDTTornado WarningBOUMorgan32 min
Aug 3, 2:30 PM MDTTornado WarningBOUWashington45 min
Aug 3, 2:32 PM MDTSevere Thunderstorm WarningBOULarimer, Weld58 min
Aug 3, 2:38 PM MDTAreal Flood AdvisoryBOUDouglas3 hr
Aug 3, 3:03 PM MDTSpecial Weather StatementBOUDenver42 min
Aug 3, 3:12 PM MDTTornado WarningBOUWashington33 min
Aug 3, 3:13 PM MDTTornado WarningBOULarimer, Weld47 min
Aug 3, 3:16 PM MDTTornado WarningBOUMorgan29 min
Aug 3, 3:45 PM MDTTornado WarningBOUWeld45 min
Aug 3, 3:45 PM MDTTornado WarningBOULincoln, Washington30 min
Aug 3, 3:51 PM MDTFlash Flood WarningBOUWashington3 hr
Aug 3, 3:57 PM MDTSevere Thunderstorm WarningBOULarimer, Weld63 min
Aug 3, 4:14 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert46 min
Aug 3, 4:16 PM MDTTornado Warning Tornado observedBOULincoln29 min
Aug 3, 4:27 PM MDTAreal Flood AdvisoryBOUWeld93 min
Aug 3, 4:27 PM MDTTornado WarningBOUElbert33 min
Aug 3, 4:31 PM MDTTornado Warning Tornado observedBOUWeld44 min
Aug 3, 4:44 PM MDTTornado WarningBOULincoln31 min
Aug 3, 4:45 PM MDTFlash Flood WarningBOUWeld2 hr
Aug 3, 4:49 PM MDTSevere Thunderstorm WarningBOUBoulder41 min
Aug 3, 4:54 PM MDTTornado WarningBOUElbert36 min
Aug 3, 4:55 PM MDTTornado WarningBOUWeld50 min
Aug 3, 5:13 PM MDTTornado WarningBOULincoln32 min
Aug 3, 5:34 PM MDTSevere Thunderstorm WarningBOUAdams, Boulder, Broomfield, Weld41 min
Aug 3, 5:39 PM MDTTornado WarningBOUElbert, Lincoln51 min
Aug 3, 5:43 PM MDTAreal Flood AdvisoryBOUBoulder3 hr
Aug 3, 5:45 PM MDTTornado WarningBOUMorgan, Weld45 min

Nearby

Tornado Warnings in Colorado, 2013Every tornado warning in 2013Tornadoes in 2013

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.