Alert archive / Colorado / Tornado Warnings in 2007

Tornado Warning 31, NWS Denver/Boulder, CO

May 5, 2007Logan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 5, 2007, 11:58 AM MDT for Logan County, Colorado. It was in force for 47 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 5, 2007, 11:58 AM MDT (17:58 UTC)
Expired
May 5, 2007, 12:45 PM MDT
In force
47 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Logan County, CO

The radar

The Denver radar (KFTG), 146 km from the middle of the area, began a volume at 17:58 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 (KDNR), launched 12:00Z, 6.0 hours before the alert went out and 79 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 2007-05-05Temperature 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 2007-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
657 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
89 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.

000 
WFUS55 KBOU 051759
TORBOU
COC075-051845-
/O.NEW.KBOU.TO.W.0031.070505T1758Z-070505T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
1158 AM MDT SAT MAY 5 2007

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL LOGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 1245 PM MDT

* AT 1158 AM MDT...THE PUBLIC REPORTED A TORNADO 3 MILES EAST OF
  STERLING...NEAR THE INTERSTATE 76 AND HIGHWAY 61 INTERCHANGE. THIS 
STORM WAS MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PADRONI...
  NORTH STERLING RESERVOIR...ILIFF...ATWOOD AND STERLING.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE
IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

LAT...LON 4044 10328 4044 10301 4079 10298 4079 10330

$$
1 follow-up statement
000 
WWUS55 KBOU 051815
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1213 PM MDT SAT MAY 5 2007

COC075-051845-
/O.CON.KBOU.TO.W.0031.000000T0000Z-070505T1845Z/
LOGAN CO-
1213 PM MDT SAT MAY 5 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 PM MDT FOR CENTRAL
LOGAN COUNTY...

AT 1213 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
TRACK A TORNADO.  THIS STORM WAS LOCATED 6 MILES NORTHEAST OF 
STERLING. THIS STORM WAS MOVING NORTHEAST AT 20 MPH DIRECTLY ALONG 
INTERSTATE 76.  EARLIER...THE PUBLIC AND SHERIFFS DEPARTMENT 
REPORTED A TORNADO NEAR THE INTERSTATE 76 AND HIGHWAY 61 INTERCHANGE.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PADRONI...NORTH STERLING RESERVOIR...ILIFF...ATWOOD AND STERLING.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO SAFE
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER
YOUR HEAD.

LAT...LON 4044 10328 4044 10301 4079 10298 4079 10330

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 6:21 PM MDTSevere Thunderstorm WarningBOUArapahoe39 min
May 4, 6:39 PM MDTSevere Thunderstorm WarningBOULincoln38 min
May 4, 6:41 PM MDTTornado WarningBOUArapahoe31 min
May 4, 6:58 PM MDTTornado WarningBOUWashington47 min
May 4, 8:15 PM MDTTornado WarningBOULincoln45 min
May 4, 8:42 PM MDTTornado WarningBOUElbert, Lincoln48 min
May 4, 8:44 PM MDTTornado WarningBOUWashington46 min
May 4, 9:00 PM MDTTornado WarningBOULincoln45 min
May 4, 9:28 PM MDTTornado WarningBOULincoln47 min
May 4, 9:32 PM MDTTornado WarningBOUWashington43 min
May 4, 10:15 PM MDTTornado WarningBOULincoln30 min
May 4, 11:00 PM MDTSevere Thunderstorm WarningBOUPhillips, Sedgwick60 min
May 4, 11:22 PM MDTTornado WarningBOUPhillips, Sedgwick38 min
May 5, 11:25 AM MDTSevere Thunderstorm WarningBOULogan16 min
May 5, 12:37 PM MDTTornado WarningBOULogan28 min
May 5, 4:01 PM MDTTornado WarningBOUAdams29 min

Nearby

Tornado Warnings in Colorado, 2007Every tornado warning in 2007Tornadoes in 2007

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.