Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 73, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 16, 1996, 3:41 PM MDT for Larimer County, Colorado. It was in force for 34 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 16, 1996, 3:41 PM MDT (21:41 UTC)
- Expired
- Jun 16, 1996, 4:15 PM MDT
- In force
- 34 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 21:42 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 |
|---|---|---|---|
| Jun 16, 4:00 PM MDT | Hail 1 | Estes Park, CO | |
| Jun 16, 4:10 PM MDT | Hail 0.75 | Estes Park, CO |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.7 hours before the alert went out and 209 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
- 1401 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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, Jun 16, 11:24 AM MDT, 4 hours 17 minutes before
COZ030-032>050-170600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1115 AM MDT SUN JUN 16 1996 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: THE LOW PRESSURE SYSTEM THAT WAS LOCATED OVER COLORADO ON SATURDAY HAS MOVED NORTHEASTWARD INTO NEBRASKA. THE AIR MASS IS MORE STABLE THAN IT WAS BEFORE THE RAINOUT ON SATURDAY. LEFTOVER LOW LEVEL MOISTURE EXISTS AND SOME THUNDERSTORMS WI8LL DEVELOP ...MAINLY IN THE MOUNTAINS AND FOOTHILLS. ANY THUNDERSTORMS THAT DO DEVELOP ARE NOT EXPECTED TO BE VERY STORNG OR SEVERE. THUS...SPOTTER ACTIVATION IS NOT EXPECTED. IMY
Special weather statement, Jun 16, 3:11 PM MDT, 30 minutes before
COZ035-038-039-162115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 304 PM MDT SUN JUN 16 1996 AT 304 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM ABOUT 10 MILES WEST OF FORT COLLINS. ANOTHER STRONG THUNDERSTORM WAS LOCATED ABOUT 20 MILES NORTH OF FORT COLLINS. THESE STORMS WERE PRODUCING SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS UP TO 40 MPH. THE STORMS WERE MOVING SOUTH/SOUTHEAST AT 20 MILES AN HOUR. PERSONS IN OR NEAR FORT COLLINS...BERTHOUD...BUCKHORN MOUNTAIN... DRAKE...JAMESTOWN...LOVELAND...AND LYONS SHOULD MOVE INDOORS WHEN THESE STORMS APPROACH. BARJENBRUCH
Special weather statement, Jun 16, 3:17 PM MDT, 24 minutes before
COZ030-032>050-170600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 315 PM MDT SUN JUN 16 1996 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: THE LOW PRESSURE SYSTEM THAT WAS LOCATED OVER COLORADO ON SATURDAY HAS MOVED NORTHEASTWARD INTO IOWA. THUNDERSTORMS ARE DEVELOPING THIS AFTERNOON IN THE FOOTHILLS... ESPECIALLY ACROSS LARIMER COUNTY. THESE THUNDERSTORMS WILL CONTINUE TO SLOWLY INTENSIFY AS THEY MOVE SOUTHEASTWARD. THE STORMS...INITIALLY... WILL WEAKEN AS THEY MOVE OUT OF THE FOOTHILLS. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE FOOTHILLS UNTIL 830 PM. THE MAIN THREAT OF SEVERE WEATHER WILL BE HAIL FROM 3/4 TO 1 INCH IN DIAMETER. THE STABLE AIR MASS WILL CAUSE THE THUNDERSTORMS TO WEAKEN BEFORE THEY MOVE VERY FAR EASTWARD ONTO THE PLAINS. IMY
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 3:59 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 31 min |
| Jun 16, 4:12 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 33 min |
| Jun 16, 5:14 PM MDT | Severe Thunderstorm Warning | BOU | Jefferson | 31 min |
| Jun 16, 5:33 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 42 min |
| Jun 16, 5:52 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 38 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1996Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.