Alert archive / Colorado / Tornado Warnings in 1996
Tornado Warning 48, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jul 12, 1996, 8:50 PM MDT for Adams County, Denver County, Jefferson County, Colorado. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1996, 8:50 PM MDT (02:50 UTC)
- Expired
- Jul 12, 1996, 9:15 PM MDT
- In force
- 25 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Denver County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 24 km from the middle of the area, began a volume at 02:49 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 00:00Z, 2.8 hours before the alert went out and 137 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
- 1200 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1461 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 130252
TORDEN
COC001-013-031-059-130315-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
850 PM MDT FRI JUL 12 1996
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 915 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES
IN NORTHEAST COLORADO
SOUTHEASTERN BOULDER...NORTHEASTERN JEFFERSON...WEST CENTRAL
DENVER AND EXTREME WESTERN ADAMS
INCLUDING THE FOLLOWING LOCATIONS
ARVADA...SOUTHEASTERN BOULDER...BROOMFIELD...COMMERCE CITY...
NORTHERN DENVER...NORTHERN GOLDEN...NORTHERN LAKEWOOD...
NORTHGLENN...THORNTON...WESTMINSTER...WHEAT RIDGE...EDGEWATER...
FEDERAL HEIGHTS...LAFAYETTE...LEYDEN...LOUISVILLE...MARSHALL...
MOUNTAIN VIEW...ROCKY FLATS AND SUPERIOR
AT 838 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM WITH A POSSIBLE TORNADO OVER BROOMFIELD...OR ABOUT 16
MILES NORTHWEST OF DENVER.
THE STORM WAS MOVING SOUTH 15 MPH.
A TORNADO WAS REPORTED IN THE BROOMFIELD AREA AROUND 120TH
MANY PUBLIC AND SPOTTER REPORTS HAVE BEEN RECEIVED OF 3/4 INCH HAIL
AND RAINFALL OF AN INCH OR MORE PER HOUR. GUSTY WINDS TO 50 MPH
HAVE ALSO BEEN REPORTED.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER
A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
LAT...LON 3973 10490 3972 10525 4002 10525 4004 10490What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 12, 4:10 PM MDT, 4 hours 40 minutes before
COZ035-038-122300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 410 PM MDT FRIDAY JULY 12 1996 ...HAIL AND STRONG THUNDERSTORM IN LARIMER COUNTY... A STRONG THUNDERSTORM WAS MOVING THROUGH CENTRAL LARIMER COUNTY AT 410 PM MDT. THIS THUNDERSTORM WAS APPROACHING THE TOWN OF RUSTIC AND WAS MOVING EAST ABOUT 20 MPH WHICH MEANS IT WILL PASS OVER POUDRE PARK AND APPROACH FORT COLLINS BY 5 PMN MDT. 1/2 INCH DIAMETER HAIL WAS REPORTED 9 MILES WEST SOPUTHWEST OF THE TOWN OF RUSTIC. IF THIS THUNDERSTORM APPROACHES YOUR AREA MOVE INDOORS. AVOID BECOMING A VICTIM OF LIGHTNING OR SUFFERING DAMAGE FROM HAIL. HEAVY RAIN IS ALSO POSSIBLE WITH THE THUNDERSTORM. MOTORISTS IN LARIMER COUNTY SHOULD BE ALERT FOR PONDING OF WATER ON ROADWAYS ESPECIALLY IN LOW LYING AREAS. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 8 PM MDT. END...GCF...WSFO DENVER
Special weather statement, Jul 12, 5:27 PM MDT, 3 hours 23 minutes before
COZ038-130030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 525 PM MDT FRIDAY JULY 12 1996 ...THUNDERSTORM APPROACHING PAWNEE GRASSLANDS... RADAR INDICATES THAT A STRONG THUNDERSTORM HAS MOVED ACROSS THE WYOMING BORDER INTO NORTHWEST WELD COUNTY. THE THUNDERSTORM WAS LOCATED 5 MILES NORTH OF ROCKPOR COLORADO OR ABOUT 25 MILES SOUTH OF CHEYENNE WYOMIONG AT 525 PM MDT. IT WAS MOVING TO THE SOUTHEAST ABOUT 20 MPH AND WILL MOVE INTO THE PAWNEE GRASSLANDS BETWEEN 6 AND 630 PM MDT. IF YOU ARE IN THE OPEN SEEK SHELTER IF THIS THUNDERSTORM APPROACHES. IT MAY CONTAIN MARBLE OR LARGER SIZE HAIL ALONG WITH MODERATE TO HEAVY RAIN AND DEADLY LIGHTNING. WIND GUSTS TO 40 OR 50 MPH ARE ALSO POSSIBLE WITH THIS THUNDERSTORM. MOTORISTS DRIVING ALONG HIGHWAY 85 FROM NUNN NORTH TO THE WYOMING BORDER SHOULD BE ALERT FOR WATER PONDING ON ROADWAYS ESPECIALLY IN LOW LYING AREAS. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 8 PM MDT. END...GCF...WSFO DENVER
Special weather statement, Jul 12, 7:20 PM MDT, 1 hour 30 minutes before
COZ042-043-130145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 718 PM MDT FRI JUL 12 1996 ...THUNDERSTORM IN CENTRAL WELD COUNTY... AT 710 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 3 MILES EAST OF GILL...OR ABOUT 12 MILES EAST OF GREELEY. HAMD RADIO SPOTTERS REPORT PEA SIZE HAIL AND HEAVY RAIN WITH LOCAL STREET FLOODING FROM THIS THUNDERSTORM. THE STORM WAS MOVING NORTHEAST AT 35 MILES PER HOUR. PERSONS IN OR NEAR BARNESVILLE...BRIGGSDALE...GALETON...GILL... KERSEY...PURCELL AND RIVERSIDE RESERVOIR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. A TORNADO 2WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL MIDNIGHT. END...BOODA...WSFO DENVER
Special weather statement, Jul 12, 8:31 PM MDT, 19 minutes before
COZ044-045-049-046-041-130330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 830 PM MDT FRI JUL 12 1996 ...THUNDERSTORMS IN NORTHEAST COLORADO... CLUSTERS OF THUNDERSTORMS MOVING THROUGH DOUGLAS...ELBERT...LINCOLN... WASHINGTON...MORGAN AND EASTERN ADAMS AND ARAPAHOE COUNTIES ARE DUMPING HEAVY RAIN AND SMALL HAIL. THE HEAVY RAIN IS FALLING IN SOME LOCATIONS AT THE RATE OF 1 INCH PER HOUR. THE THUNDERSTORMS ARE MOVING TO THE SOUTHEAST ABOUT 10-20 MPH. ANYONE TRAVELLING ON I-70 EAST OF DENVER OR I-76 THROUGH MORGAN COUNTY AS WELL AS OTHER ROADS IN NORTHEAST COLORADO SHOULD DRIVE WITH CAUTION AND BE ALERT FOR HEAVY RAIN CAUSING LOCAL FLOODING OF STREETS AND HIGHWAYS ESPECIALLY IN LOW LYING AREAS. MANY SMALL STREAMS AND CREEKS WILL BE RUNNING QUITE HIGH AND FAST. DO NOT TRY TO FORD OR WADE ACROSS RAIN SWOLLEN STREAMS. MOST OF THE THUNDERSTORMS ARE SLOWLY WEAKENING BUT WILL CONTINUE TO RUMBLE UNTIL WELL AFTELR DARK. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL MIDNIGHT. END...BOODA...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:35 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| Jul 12, 7:02 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Jefferson | 43 min |
| Jul 12, 7:10 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 50 min |
| Jul 12, 7:26 PM MDT | Tornado Warning | BOU | Adams, Arapahoe, Washington | 34 min |
| Jul 12, 7:50 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 40 min |
| Jul 12, 7:54 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Denver | 21 min |
| Jul 12, 7:54 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 21 min |
| Jul 12, 8:13 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Weld | 47 min |
| Jul 12, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas | 40 min |
| Jul 12, 8:50 PM MDT | Tornado Warning | BOU | Boulder | 25 min |
| Jul 12, 9:05 PM MDT | Tornado Warning | BOU | Weld | 25 min |
| Jul 12, 9:16 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Jefferson | 44 min |
| Jul 12, 9:19 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 41 min |
| Jul 12, 9:29 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 31 min |
| Jul 12, 10:01 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 44 min |
| Jul 12, 10:06 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 24 min |
| Jul 12, 10:13 PM MDT | Flash Flood Warning | BOU | Jefferson, Park | 4 hr |
| Jul 13, 2:30 AM MDT | Flash Flood Warning | BOU | Jefferson | 3 hr |
| Jul 13, 2:40 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 35 min |
| Jul 13, 3:12 PM MDT | Tornado Warning | BOU | Weld | 33 min |
| Jul 13, 3:40 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 35 min |
| Jul 13, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 40 min |
| Jul 13, 4:10 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Washington | 35 min |
| Jul 13, 4:10 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 35 min |
| Jul 13, 4:11 PM MDT | Tornado Warning | BOU | Morgan, Washington | 34 min |
| Jul 13, 4:24 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 21 min |
| Jul 13, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 45 min |
| Jul 13, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
| Jul 13, 4:50 PM MDT | Tornado Warning | BOU | Washington | 25 min |
| Jul 13, 5:00 PM MDT | Tornado Warning | BOU | Adams, Arapahoe | 30 min |
| Jul 13, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Elbert | 45 min |
| Jul 13, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 6 hr |
Nearby
Tornado Warnings in Colorado, 1996Every tornado warning in 1996Tornadoes in 1996
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.