Alert archive / Colorado / Tornado Warnings in 2013
Tornado Warning 39, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jul 31, 2013, 8:18 PM MDT for Arapahoe County, Elbert County, Colorado. It was in force for 27 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 31, 2013, 8:18 PM MDT (02:18 UTC)
- Expired
- Jul 31, 2013, 8:45 PM MDT
- In force
- 27 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Arapahoe County, CO, Elbert County, CO
The radar
The Denver radar (KFTG), 46 km from the middle of the area, began a volume at 02:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 31, 8:27 PM MDT | TSTM WND GST 70 | 2 Sw Deer Trail, CO | |
| Jul 31, 8:35 PM MDT | TSTM WND GST 70 | 2 Ne Deer Trail, CO | POWER OUTAGES. |
| Jul 31, 8:40 PM MDT | TSTM WND DMG | Deer Trail, CO | NUMEROUS POWER POLES SNAPPED IN HALF IN DEER TRAIL VICINITY. WIDEPREAD POWER OUTAGES IN CENTRAL ARAPAHOE COUNTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 2.3 hours before the alert went out and 77 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3666 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
751
WFUS55 KBOU 010218
TORBOU
COC005-039-010245-
/O.NEW.KBOU.TO.W.0039.130801T0218Z-130801T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
818 PM MDT WED JUL 31 2013
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
EASTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO...
NORTH CENTRAL ELBERT COUNTY IN EAST CENTRAL COLORADO...
* UNTIL 845 PM MDT
* AT 817 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED NEAR DEER TRAIL...OR 33 MILES NORTHWEST OF
LIMON...MOVING SOUTHEAST AT 20 MPH.
HAZARD...TORNADO.
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...
DEER TRAIL.
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.
&&
LAT...LON 3958 10418 3974 10410 3969 10389 3945 10398
TIME...MOT...LOC 0217Z 296DEG 17KT 3965 10408
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
RPK3 follow-up statements
949
WWUS55 KBOU 010226
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
826 PM MDT WED JUL 31 2013
COC005-039-010245-
/O.CON.KBOU.TO.W.0039.000000T0000Z-130801T0245Z/
ARAPAHOE CO-ELBERT CO-
826 PM MDT WED JUL 31 2013
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR EASTERN
ARAPAHOE AND NORTH CENTRAL ELBERT COUNTIES...
AT 826 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS NEAR DEER TRAIL...OR 30 MILES NORTHWEST OF LIMON...MOVING
SOUTHEAST AT 25 MPH.
HAZARD...TORNADO AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.
LOCATIONS IMPACTED INCLUDE...
DEER TRAIL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 3958 10418 3974 10410 3969 10389 3945 10398
TIME...MOT...LOC 0226Z 295DEG 20KT 3962 10401
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
RPK548
WWUS55 KBOU 010234
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
834 PM MDT WED JUL 31 2013
COC005-039-010245-
/O.CON.KBOU.TO.W.0039.000000T0000Z-130801T0245Z/
ARAPAHOE CO-ELBERT CO-
834 PM MDT WED JUL 31 2013
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR EASTERN
ARAPAHOE AND NORTH CENTRAL ELBERT COUNTIES...
AT 833 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 5 MILES SOUTHEAST OF DEER TRAIL...OR 25 MILES NORTHWEST
OF LIMON...MOVING SOUTHEAST AT 25 MPH.
HAZARD...TORNADO AND QUARTER 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...
DEER TRAIL.
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.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 3958 10418 3974 10410 3969 10389 3945 10398
TIME...MOT...LOC 0233Z 308DEG 20KT 3957 10396
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
RPK768
WWUS55 KBOU 010243
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
843 PM MDT WED JUL 31 2013
COC005-039-010252-
/O.EXP.KBOU.TO.W.0039.000000T0000Z-130801T0245Z/
ARAPAHOE CO-ELBERT CO-
843 PM MDT WED JUL 31 2013
...THE TORNADO WARNING FOR EASTERN ARAPAHOE AND NORTH CENTRAL ELBERT
COUNTIES WILL EXPIRE AT 845 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 3958 10418 3974 10410 3969 10389 3945 10398
TIME...MOT...LOC 0238Z 296DEG 17KT 3957 10396
$$
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 7:00 PM MDT | Special Weather Statement | BOU | Adams | 30 min |
| Jul 31, 7:11 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 34 min |
| Jul 31, 7:42 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 33 min |
| Jul 31, 8:07 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 23 min |
| Jul 31, 8:42 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 33 min |
| Jul 31, 9:32 PM MDT | Special Weather Statement | BOU | Lincoln | 28 min |
| Jul 31, 9:34 PM MDT | Special Weather Statement | BOU | Washington | 26 min |
| Jul 31, 9:44 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 31 min |
| Aug 1, 3:40 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 50 min |
| Aug 1, 3:45 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 30 min |
| Aug 1, 4:02 PM MDT | Areal Flood Advisory | BOU | Elbert | 118 min |
| Aug 1, 4:11 PM MDT | Areal Flood Advisory | BOU | Lincoln | 2 hr |
| Aug 1, 5:23 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.