Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 266, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 28, 1996, 5:24 PM MDT for Washington County, Colorado. It was in force for 36 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
- Aug 28, 1996, 5:24 PM MDT (23:24 UTC)
- Expired
- Aug 28, 1996, 6:00 PM MDT
- In force
- 36 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Washington County, CO
The radar
The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 23:24 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 28, 5:38 PM MDT | Hail 1.75 | Last Chance, CO | |
| Aug 28, 5:45 PM MDT | Hail 1.75 | Lindon, 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, 11.4 hours before the alert went out and 11 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 44 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, Aug 28, 1:27 PM MDT, 3 hours 57 minutes before
COZ035-036-038>041-28200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 128 PM MDT WED AUG 28 1996 ...SCATTERED THUNDERSTORMS DEVELOPING OVER THE NORTHERN FOOTHILLS... AT 125 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SCATTERED THUNDERSTORMS DEVELOPING FROM NORTHWEST OF FORT COLLINS TO WEST OF DENVER TO BAILEY. THESE THUNDERSTORMS WILL PRODUCE RAINFALL AMOUNTS UP TO 1" PER HOUR...SMALL HAIL AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MPH. PERSONS IN THE PATH OF THESE STORMS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AS THEY MOVE INTO THE URBAN CORRIDOR BY 2 PM 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 LOW LYING ROADS COVERED WITH WATER AS THEY MAY BE FLOODED. KLEYLA
Special weather statement, Aug 28, 2:55 PM MDT, 2 hours 29 minutes before
COZ035-036-038>041-046-047-282130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT WED AUG 28 1996 ...SCATTERED THUNDERSTORMS CONTINUE OVER THE FRONT RANGE THIS AFTERNOON... AT 250 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS PRODUCING HEAVY RAIN UP TO 1.5" PER HOUR... SMALL HAIL AND DANGEROUS LIGHTNING 20 MILES SOUTHWEST OF LIMON NEAR MATHESON...40 MILES SOUTHEAST OF DENVER NEAR ELBERT AND 20 MILES NORTH OF FORT COLLINS NEAR CARR. THESE STORMS WERE MOVING SOUTHEAST AT 15 MPH. PERSONS IN THE PATH OF THESE STORMS 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 LOW LYING ROADS COVERED WITH WATER AS THEY MAY BE FLOODED. KLEYLA
Special weather statement, Aug 28, 3:32 PM MDT, 1 hour 52 minutes before
COZ038>40-046-047-282215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 332 PM MDT WED AUG 28 1996 ...SCATTERED THUNDERSTORMS CONTINUE OVER THE FRONT RANGE THIS AFTERNOON... AT 325 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS PRODUCING HEAVY RAIN UP TO 1.5" PER HOUR... SMALL HAIL AND DANGEROUS LIGHTNING 30 MILES SOUTHWEST OF LIMON OR 10 MILES WEST OF SIMLA AND 25 MILES NORTHEAST OF FORT COLLINS NEAR ROCKPORT. THESE STORMS WERE MOVING SOUTHEAST AT 15 MPH. PERSONS IN THE PATH OF THESE STORMS 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 LOW LYING ROADS COVERED WITH WATER AS THEY MAY BE FLOODED. KLEYLA
Special weather statement, Aug 28, 4:49 PM MDT, 35 minutes before
COZ038>40-046-047-282330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 449 PM MDT WED AUG 28 1996 ...SCATTERED THUNDERSTORMS CONTINUE OVER PORTIONS OF NORTHEAST COLORADO... AT 445 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS PRODUCING HEAVY RAIN UP TO 1.5" PER HOUR... HAIL AND DANGEROUS LIGHTNING 50 MILES EAST OF DENVER OR 10 MILES NORTHEAST OF DEERTRAIL...10 MILES NORTH OF LIMON...AND 40 MILES WEST OF STERLING NEAR BUCKINGHAM. THESE STORMS WERE MOVING SOUTHEAST AT 15 MPH. PERSONS IN THE PATH OF THESE STORMS 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 LOW LYING ROADS COVERED WITH WATER AS THEY MAY BE FLOODED. KLEYLA
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 5:40 PM MDT | Tornado Warning | BOU | Washington | 35 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.