Alert archive / Colorado / Tornado Warnings in 2013
Tornado Warning 47, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 3, 2013, 3:13 PM MDT for Larimer County, Weld County, Colorado. It was in force for 47 min. 5 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
- Aug 3, 2013, 3:13 PM MDT (21:13 UTC)
- Expired
- Aug 3, 2013, 4:00 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.75 in
Counties Larimer County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 56 km from the middle of the area, began a volume at 21:13 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 |
|---|---|---|---|
| Aug 3, 3:17 PM MDT | HAIL 1.75 | 1 E Wellington, CO | |
| Aug 3, 3:20 PM MDT | HAIL 1.75 | 2 W Pierce, CO | |
| Aug 3, 3:21 PM MDT | HAIL 1.25 | 5 Se Wellington, CO | |
| Aug 3, 3:21 PM MDT | HAIL 1.5 | Wellington, CO | |
| Aug 3, 3:41 PM MDT | HAIL 1.75 | 1 Nw Ault, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 3, 2:35 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.2 hours before the alert went out and 162 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
150
WFUS55 KBOU 032113
TORBOU
COC069-123-032200-
/O.NEW.KBOU.TO.W.0047.130803T2113Z-130803T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
313 PM MDT SAT AUG 3 2013
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
WESTERN WELD COUNTY IN NORTHEAST COLORADO...
EXTREME EASTERN LARIMER COUNTY IN NORTH CENTRAL COLORADO...
* UNTIL 400 PM MDT
* AT 313 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED NEAR WELLINGTON...OR 13 MILES NORTH OF FORT
COLLINS...MOVING SOUTHEAST AT 15 MPH. ANOTHER SEVERE THUNDERSTORM
WITH A POSSIBLE TORNADO WAS 3 MILES SOUTH OF NUNN.
HAZARD...TORNADO AND GOLF 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...
WINDSOR...WELLINGTON...EATON...SEVERANCE...AULT...PIERCE...NUNN...
PURCELL...GALETON AND LUCERNE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING ISSUED
FOR THE SAME AREA.
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 4076 10505 4085 10495 4059 10445 4048 10465
4046 10494
TIME...MOT...LOC 2113Z 311DEG 12KT 4075 10499
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
GIMMESTAD3 follow-up statements
210
WWUS55 KBOU 032128
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
328 PM MDT SAT AUG 3 2013
COC069-123-032200-
/O.CON.KBOU.TO.W.0047.000000T0000Z-130803T2200Z/
WELD CO-LARIMER CO-
328 PM MDT SAT AUG 3 2013
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR WESTERN
WELD AND EXTREME EASTERN LARIMER COUNTIES...
AT 327 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 4 MILES SOUTHEAST OF WELLINGTON...OR 10 MILES NORTHEAST
OF FORT COLLINS...MOVING SOUTHEAST AT 15 MPH. ANOTHER SEVERE
THUNDERSTORM WITH A POSSIBLE TORNADO WAS JUST WEST OF PIERCE MOVING
SOUTHEAST. GOLF BALL HAIL HAS BEEN REPORTED WITH BOTH OF THESE
STORMS.
HAZARD...TORNADO AND GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.
LOCATIONS IMPACTED INCLUDE...
WINDSOR...WELLINGTON...EATON...SEVERANCE...AULT...PIERCE...NUNN...
PURCELL...GALETON AND LUCERNE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4073 10502 4083 10497 4085 10495 4059 10445
4048 10465 4046 10494
TIME...MOT...LOC 2127Z 319DEG 15KT 4067 10493
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
GIMMESTAD685
WWUS55 KBOU 032138
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
338 PM MDT SAT AUG 3 2013
COC069-032147-
/O.CAN.KBOU.TO.W.0047.000000T0000Z-130803T2200Z/
LARIMER CO-
338 PM MDT SAT AUG 3 2013
...THE TORNADO WARNING FOR EXTREME EASTERN LARIMER COUNTY IS
CANCELLED...
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF LARIMER COUNTY. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4060 10494 4067 10489 4067 10466 4059 10445
4048 10465 4046 10494
TIME...MOT...LOC 2137Z 314DEG 11KT 4059 10473
$$
COC123-032200-
/O.CON.KBOU.TO.W.0047.000000T0000Z-130803T2200Z/
WELD CO-
338 PM MDT SAT AUG 3 2013
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR WEST
CENTRAL WELD COUNTY...
AT 337 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER AULT...OR 11 MILES NORTH OF GREELEY...MOVING
SOUTHEAST AT 15 MPH. ANOTHER STRONG THUNDERSTORM WAS LOCATED 8 MILES
NORTH OF WINDSOR MOVING SOUTHEAST.
HAZARD...TORNADO AND GOLF BALL SIZE HAIL.
SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD.
IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.
LOCATIONS IMPACTED INCLUDE...
WINDSOR...EATON...SEVERANCE...AULT...PIERCE...PURCELL...GALETON AND
LUCERNE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4060 10494 4067 10489 4067 10466 4059 10445
4048 10465 4046 10494
TIME...MOT...LOC 2137Z 314DEG 11KT 4059 10473
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
GIMMESTAD844
WWUS55 KBOU 032201
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
401 PM MDT SAT AUG 3 2013
COC123-032209-
/O.EXP.KBOU.TO.W.0047.000000T0000Z-130803T2200Z/
WELD CO-
401 PM MDT SAT AUG 3 2013
...THE TORNADO WARNING FOR WEST CENTRAL WELD COUNTY WILL EXPIRE AT
400 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING TORNADOES WERE LOCATED 4
MILES NORTHWEST OF EATON AND NEAR WINDSOR MOVING SOUTHEAST.
REMEMBER...A TORNADO WARNING STILL REMAINS IN EFFECT FOR WESTERN
WELD COUNTY INCLUDING GREELEY...EATON...WINDSOR...AND SURROUNDING
AREAS UNTIL 430 PM.
LAT...LON 4060 10494 4067 10489 4067 10466 4059 10445
4048 10465 4046 10494
TIME...MOT...LOC 2157Z 311DEG 12KT 4059 10473
$$
GIMMESTADThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:01 PM MDT | Special Weather Statement | BOU | Larimer | 44 min |
| Aug 2, 10:05 PM MDT | Special Weather Statement | BOU | Morgan | 40 min |
| Aug 3, 12:53 PM MDT | Special Weather Statement | BOU | Boulder | 37 min |
| Aug 3, 1:35 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 40 min |
| Aug 3, 1:44 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 46 min |
| Aug 3, 1:53 PM MDT | Tornado Warning | BOU | Morgan | 37 min |
| Aug 3, 1:57 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Aug 3, 2:01 PM MDT | Tornado Warning | BOU | Washington | 29 min |
| Aug 3, 2:11 PM MDT | Tornado Warning | BOU | Morgan | 34 min |
| Aug 3, 2:15 PM MDT | Flash Flood Warning | BOU | Morgan, Washington | 3 hr |
| Aug 3, 2:28 PM MDT | Tornado Warning | BOU | Morgan | 32 min |
| Aug 3, 2:30 PM MDT | Tornado Warning | BOU | Washington | 45 min |
| Aug 3, 2:32 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 58 min |
| Aug 3, 2:38 PM MDT | Areal Flood Advisory | BOU | Douglas | 3 hr |
| Aug 3, 2:41 PM MDT | Tornado Warning | BOU | Morgan | 34 min |
| Aug 3, 3:03 PM MDT | Special Weather Statement | BOU | Denver | 42 min |
| Aug 3, 3:12 PM MDT | Tornado Warning | BOU | Washington | 33 min |
| Aug 3, 3:16 PM MDT | Tornado Warning | BOU | Morgan | 29 min |
| Aug 3, 3:45 PM MDT | Tornado Warning | BOU | Weld | 45 min |
| Aug 3, 3:45 PM MDT | Tornado Warning | BOU | Lincoln, Washington | 30 min |
| Aug 3, 3:51 PM MDT | Flash Flood Warning | BOU | Washington | 3 hr |
| Aug 3, 3:57 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 63 min |
| Aug 3, 4:14 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 46 min |
| Aug 3, 4:16 PM MDT | Tornado Warning | BOU | Lincoln | 29 min |
| Aug 3, 4:27 PM MDT | Areal Flood Advisory | BOU | Weld | 93 min |
| Aug 3, 4:27 PM MDT | Tornado Warning | BOU | Elbert | 33 min |
| Aug 3, 4:31 PM MDT | Tornado Warning | BOU | Weld | 44 min |
| Aug 3, 4:44 PM MDT | Tornado Warning | BOU | Lincoln | 31 min |
| Aug 3, 4:45 PM MDT | Flash Flood Warning | BOU | Weld | 2 hr |
| Aug 3, 4:49 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 41 min |
| Aug 3, 4:54 PM MDT | Tornado Warning | BOU | Elbert | 36 min |
| Aug 3, 4:55 PM MDT | Tornado Warning | BOU | Weld | 50 min |
| Aug 3, 5:13 PM MDT | Tornado Warning | BOU | Lincoln | 32 min |
| Aug 3, 5:34 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Broomfield, Weld | 41 min |
| Aug 3, 5:39 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 51 min |
| Aug 3, 5:43 PM MDT | Areal Flood Advisory | BOU | Boulder | 3 hr |
| Aug 3, 5:45 PM MDT | Tornado Warning | BOU | Morgan, Weld | 45 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.