Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 243, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 4, 1996, 8:42 PM MDT for Washington County, Colorado. It was in force for 33 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 4, 1996, 8:42 PM MDT (02:42 UTC)
- Expired
- Aug 4, 1996, 9:15 PM MDT
- In force
- 33 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 02:45 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 4, 9:20 PM MDT | Thunderstorm Wind 52 | Cope, 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, 2.7 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
- 1224 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 2383 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.8
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 4, 6:01 PM MDT, 2 hours 41 minutes before
COZ042>050-050030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 602 MDT SUN AUG 4 1996 ...THUNDERSTORMS INCREASING ACROSS NORTHEAST PLAINS OF COLORADO... AT 555 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM EAST OF HUDSON TO NEAR WIGGINS. ANOTHER LINE OF STORNG THUNDERSTORMS EXTENDED FROM WEST OF LAST CHANCE TO WEST OF AKRON. THESE THUNDERSTORMS MAY PRODUCE HEAVY RAIN...HAIL TO 1/2" IN DIAMETER...GUSTY WINDS TO 40 MPH AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. IF THREATENING WEATHER APPROACHES YOUR AREA SEEK SHELTER INDOORS UNTIL THE THUNDERSTORMS HAVE PASSED. KLEYLA
Special weather statement, Aug 4, 6:25 PM MDT, 2 hours 17 minutes before
COZ042>050-050100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 625 MDT SUN AUG 4 1996 ...THUNDERSTORMS CONTINUE ACROSS NORTHEAST PLAINS OF COLORADO... AT 620 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF SCATTERED STRONG THUNDERSTORMS FROM NEAR KIOWA IN ELBERT COUNTY TO WIGGINS IN MORGAN COUNTY TO STONEHAM IN EXTREME SOUTHEASTERN WELD COUNTY. IN ADDITION A SECOND LINE OF STRONG THUNDERSTORMS EXTENDED FROM NEAR LAST CHANCE TO AKRON TO NEAR FLEMING. THESE STORMS MAY PRODUCE HEAVY RAIN...HAIL TO 1/2 INCH IN DIAMETER...GUSTY WINDS TO 50 MPH AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. IF THREATENING WEATHER APPROACHrES YOUR AREA SEEK SHELTER INDOORS UNTIL THE THUNDERSTORMS HAVE PASSED. KLEYLA
Special weather statement, Aug 4, 6:57 PM MDT, 1 hour 45 minutes before
COZ042>050-050130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 658 MDT SUN AUG 4 1996 ...THUNDERSTORMS CONTINUE ACROSS NORTHEAST PLAINS OF COLORADO... AT 655 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF SCATTERED STRONG THUNDERSTORMS FROM EAST OF LAST CHANCE TO AKRON TO NEAR SEDGWICK. THESE STORMS WILL PRODUCE HEAVY RAIN...HAIL TO 1/2" IN DIAMETER...GUSTY WINDS TO 50 MPH AND DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. IF THREATENING WEATHER APPROACHES YOUR AREA SEEK SHELTER INDOORS UNTIL THE THUNDERSTORMS HAVE PASSED. KLEYLA
Special weather statement, Aug 4, 8:20 PM MDT, 22 minutes before
COZ046>050-050300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 820 PM MDT SUN AUG 4 1996 ...STRONG THUNDERSTORMS CONTINUE OVER THE NORTHEAST PLAINS OF COLORADO... AT 815 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM AKRON EXTENDING SOUTHWEST TO LIMON. ANOTHER STRONG THUNDERSTORM WAS ALONG THE YUMA-PHILLIPS COUNTY LINE SOUTH OF HOLYOKE. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...HAIL TO 1/2 INCH IN DIAMETER...GUSTY WINDS TO 50 MPH ALONG WITH DANGEROUS LIGHTNING. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. IF THREATENING WEATHER APPROACHES YOUR AREA SEEK SHELTER INDOORS UNTIL THE THUNDERSTORMS HAVE PASTSED. KLEYLA
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:16 PM MDT | Tornado Warning | BOU | Washington | 29 min |
| Aug 4, 7:42 PM MDT | Tornado Warning | BOU | Washington | 33 min |
| Aug 4, 9:11 PM MDT | Tornado Warning | BOU | Washington | 19 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.