Alert archive / Colorado / Tornado Warnings in 2015
Tornado Warning 20, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 24, 2015, 1:00 PM MDT for Arapahoe County, Colorado. It was in force for 18 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 24, 2015, 1:00 PM MDT (19:00 UTC)
- Expired
- May 24, 2015, 1:18 PM MDT
- In force
- 18 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Arapahoe County, CO
The radar
The Denver radar (KFTG), 40 km from the middle of the area, began a volume at 18:59 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 (KDEN), launched 12:00Z, 7.0 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1092 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
427 WFUS55 KBOU 241900 TORBOU COC005-241930- /O.NEW.KBOU.TO.W.0020.150524T1900Z-150524T1930Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 100 PM MDT SUN MAY 24 2015 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... EASTERN ARAPAHOE COUNTY IN NORTHEASTERN COLORADO... * UNTIL 130 PM MDT * AT 100 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED 4 MILES NORTHWEST OF DEER TRAIL...OR 35 MILES NORTHWEST OF LIMON...MOVING EAST AT 15 MPH. HAZARD...TORNADO. SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD. IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. * 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 YOU ARE IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 3959 10417 3973 10419 3974 10401 3961 10401 TIME...MOT...LOC 1900Z 250DEG 12KT 3965 10412 TORNADO...RADAR INDICATED HAIL...<.75IN $$ RPK
1 follow-up statement
586
WWUS55 KBOU 241918
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
118 PM MDT SUN MAY 24 2015
COC005-241927-
/O.CAN.KBOU.TO.W.0020.000000T0000Z-150524T1930Z/
ARAPAHOE CO-
118 PM MDT SUN MAY 24 2015
...THE TORNADO WARNING FOR EASTERN ARAPAHOE COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER GUSTY WINDS AND
HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3959 10417 3973 10419 3974 10401 3961 10401
TIME...MOT...LOC 1911Z 250DEG 12KT 3967 10405
$$
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:27 PM MDT | River Flood Warning | BOU | Logan, Morgan, Washington | 72 hr |
| May 23, 8:18 PM MDT | Areal Flood Advisory | BOU | Logan | 3 hr |
| May 23, 10:20 PM MDT | Flash Flood Warning | BOU | Logan | 5 hr |
| May 24, 2:10 AM MDT | Areal Flood Warning | BOU | Logan | 18 hr |
| May 24, 4:44 AM MDT | Flash Flood Watch | BOU | Adams, Arapahoe, Elbert, Lincoln, Logan, Morgan and 4 more | 14 hr |
| May 24, 11:22 AM MDT | Areal Flood Advisory | BOU | Elbert | 3 hr |
| May 24, 11:57 AM MDT | Flash Flood Warning | BOU | Arapahoe, Elbert | 3 hr |
| May 24, 12:08 PM MDT | Special Weather Statement | BOU | Arapahoe | 37 min |
| May 24, 12:15 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 15 min |
| May 24, 12:33 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 27 min |
| May 24, 1:23 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe | 3 hr |
| May 24, 1:25 PM MDT | Special Weather Statement | BOU | Adams | 35 min |
| May 24, 2:17 PM MDT | Special Weather Statement | BOU | Washington | 28 min |
| May 24, 2:43 PM MDT | Areal Flood Advisory | BOU | Adams, Morgan, Washington | 3 hr |
| May 24, 3:15 PM MDT | Special Weather Statement | BOU | Washington | 30 min |
Nearby
Tornado Warnings in Colorado, 2015Every tornado warning in 2015Tornadoes in 2015
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.