Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 246, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 6, 1996, 9:17 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 28 min. 1 report 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
- Aug 6, 1996, 9:17 PM MDT (03:17 UTC)
- Expired
- Aug 6, 1996, 9:45 PM MDT
- In force
- 28 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Arapahoe County, CO
The radar
The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 03:18 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 6, 9:35 PM MDT | Hail 1.75 | Byers, 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 00:00Z, 3.3 hours before the alert went out and 95 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
- 508 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 3514 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
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, Aug 6, 7:12 PM MDT, 2 hours 5 minutes before
COZ035-038>-070500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 710 PM MDT TUE AUG 6 1996 ...THUNDERSTORMS CONTINUE TO REDEVELOP OVER LARIMER COUNTY... LATEST DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUE TO REDEVELOP OVER LARIMER COUNTY...THEN HAVE PUSHED OUT INTO NORTHWEST WELD COUNTY. THIS PATTERN HAS BEEN PRESENT DURING THE PAST HOUR AND WILL CONTINUE DURING THE NEXT SEVERAL HOURS. RADAR PRECIPATION ESTIMATES BETWEErN .50 AND .75 INCHES OF RAIN HAVE ALREADY FALLEN OVER EXTREME NORTHEASTERN LARIMER COUNTY. ADDITIONAL RAINFALL WILL CAUSE SOME LOCALIZED SMALL STREAM FLOODING OVER THIS AREA. THESE STORMS SHOULD DIMINISH LATER THIS EVENING. ENTREKIN
Special weather statement, Aug 6, 7:44 PM MDT, 1 hour 33 minutes before
COZ035-038-043-070500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 740 PM MDT TUE AUG 6 1996 ...THUNDERSTORM OVER EXTREME WEST CENTRAL WELD COUNTY... LATEST DOPPLER RADAR INDICATED A HEFTY THUNDERSTORM OVER WEST CENTRAL WELD COUNTY IN THE VICINITY OF WINDSOR. BRIEF HEAVY RAIN AND HAIL ARE POSSIBLE WITH THIS STORM. A SPOTTER REPORTED 1/2 INCH HAIL WITH SOME ACCUMULATION ON THE ROADWAY JUST WEST OF WINDSOR AT 735 PM. THIS STORM IS MOVING RAPIDLY TO THE NORTHEAST AT ABOUT 30 MPH. ADDITIONAL THUNDERSTORMS CONTINUE TO DEVELOP OVER EASTERN LARIMER COUNTY AND WILL PUSH INTO WELD COUNTY THROUGH THE REMAINDER OF THE EVENING. THESE STORMS WILL DIMINISH TOWARDS MIDNIGHTb. ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 30 min |
| Aug 6, 8:50 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 30 min |
| Aug 6, 10:13 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 32 min |
| Aug 6, 10:35 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 30 min |
| Aug 6, 10:45 PM MDT | Tornado Warning | BOU | Lincoln | 30 min |
| Aug 7, 2:40 PM MDT | Flash Flood Warning | BOU | Jefferson | 116 min |
| Aug 7, 3:29 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 31 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.