Alert archive / Colorado / Tornado Warnings in 2014

Tornado Warning 3, NWS Denver/Boulder, CO

May 7, 2014Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 7, 2014, 2:39 PM MDT for Weld County, Colorado. It was in force for 36 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: May 7, 2014, 2:39 PM MDT (20:39 UTC)
Expired: May 7, 2014, 3:15 PM MDT
In force: 36 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 32 km from the middle of the area, began a volume at 20:42 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.

Issued	Product	Office	Lasted
May 7, 12:37 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.7 hours before the alert went out and 164 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 97 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 776 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 2 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, in the capitals the NWS used until 2016.

705 
WFUS55 KBOU 072039
TORBOU
COC123-072115-
/O.NEW.KBOU.TO.W.0003.140507T2039Z-140507T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
239 PM MDT WED MAY 7 2014

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL WELD COUNTY IN NORTHEAST COLORADO...

* UNTIL 315 PM MDT
    
* AT 239 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 8 MILES EAST OF ROCKPORT...OR 17 MILES
  SOUTHEAST OF CHEYENNE...MOVING NORTHEAST AT 15 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL. 

  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. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTH CENTRAL WELD COUNTY.

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 4083 10461 4090 10474 4100 10465 4100 10440
TIME...MOT...LOC 2039Z 226DEG 13KT 4093 10463 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BAKER

2 follow-up statements

265 
WWUS55 KBOU 072059
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
259 PM MDT WED MAY 7 2014

COC123-072115-
/O.CON.KBOU.TO.W.0003.000000T0000Z-140507T2115Z/
WELD CO-
259 PM MDT WED MAY 7 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM MDT FOR NORTH
CENTRAL WELD COUNTY...
    
AT 258 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 11 MILES SOUTHWEST OF CARPENTER...OR 18 MILES SOUTHEAST
OF CHEYENNE...MOVING NORTHEAST AT 15 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL. 

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. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTH CENTRAL WELD COUNTY.

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 4085 10459 4090 10474 4100 10465 4100 10440
TIME...MOT...LOC 2058Z 239DEG 14KT 4096 10454 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

RPK

884 
WWUS55 KBOU 072108
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
308 PM MDT WED MAY 7 2014

COC123-072117-
/O.EXP.KBOU.TO.W.0003.000000T0000Z-140507T2115Z/
WELD CO-
308 PM MDT WED MAY 7 2014

...THE TORNADO WARNING FOR NORTH CENTRAL WELD COUNTY WILL EXPIRE AT
315 PM MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO. 
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER HAIL UP TO 
THREE-QUARTER INCH IN DIAMETER IS STILL POSSIBLE WITH THIS 
THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT
WEDNESDAY EVENING FOR NORTHEAST COLORADO.

LAT...LON 4085 10459 4090 10474 4100 10465 4100 10440
TIME...MOT...LOC 2105Z 226DEG 13KT 4096 10454 

$$

BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 8:46 PM MDT	Special Weather Statement	BOU	Weld	29 min
May 6, 11:23 PM MDT	Special Weather Statement	BOU	Weld	52 min
May 6, 11:49 PM MDT	Severe Thunderstorm Warning	BOU	Weld	41 min
May 7, 1:31 PM MDT	Special Weather Statement	BOU	Larimer	44 min
May 7, 1:45 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	45 min
May 7, 1:51 PM MDT	Tornado Warning	BOU	Weld	24 min
May 7, 1:51 PM MDT	Tornado Warning	BOU	Weld	24 min
May 7, 2:26 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Washington	49 min
May 7, 2:32 PM MDT	Severe Thunderstorm Warning	BOU	Weld	43 min
May 7, 2:33 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	27 min
May 7, 2:56 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	34 min
May 7, 3:00 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	45 min
May 7, 3:01 PM MDT	Severe Thunderstorm Warning	BOU	Weld	44 min
May 7, 3:04 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	41 min
May 7, 3:27 PM MDT	Tornado Warning	BOU	Weld	33 min
May 7, 3:30 PM MDT	Tornado Warning	BOU	Washington	45 min
May 7, 3:57 PM MDT	Severe Thunderstorm Warning	BOU	Washington	48 min
May 7, 4:00 PM MDT	Severe Thunderstorm Warning	BOU	Weld	30 min
May 7, 4:15 PM MDT	Tornado Warning	BOU	Washington	45 min
May 7, 4:26 PM MDT	Tornado Warning	BOU	Weld	34 min
May 7, 4:50 PM MDT	Tornado Warning	BOU	Logan, Phillips, Washington	40 min
May 7, 4:52 PM MDT	Tornado Warning	BOU	Phillips	23 min
May 7, 4:57 PM MDT	Tornado Warning	BOU	Logan, Sedgwick	48 min
May 7, 5:10 PM MDT	Tornado Warning	BOU	Phillips	35 min
May 7, 5:17 PM MDT	Special Weather Statement	BOU	Broomfield	43 min
May 7, 5:24 PM MDT	Special Weather Statement	BOU	Broomfield	36 min
May 7, 5:30 PM MDT	Severe Thunderstorm Warning	BOU	Boulder	45 min
May 7, 5:30 PM MDT	Tornado Warning Tornado observed	BOU	Logan, Phillips	30 min
May 7, 5:38 PM MDT	Tornado Warning	BOU	Phillips, Sedgwick	37 min

Nearby

Tornado Warnings in Colorado, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.