Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 159, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 23, 1996, 2:32 PM MDT for Weld County, Colorado. It was in force for 43 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
- Jul 23, 1996, 2:32 PM MDT (20:32 UTC)
- Expired
- Jul 23, 1996, 3:15 PM MDT
- In force
- 43 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Weld County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 2:55 PM MDT | Hail 1 | Platteville, 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, 8.5 hours before the alert went out and 125 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
- 711 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 1597 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
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, Jul 23, 11:27 AM MDT, 3 hours 5 minutes before
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</html>Special weather statement, Jul 23, 1:37 PM MDT, 55 minutes before
COZ030-032>050-240600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 130 PM MDT TUE JUL 23 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 SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING ACROSS EASTERN COLORADO. SYNOPSIS: LOW LEVEL MOISTURE HAS NOT ERODED ALONG THE FRONT RANGE FOOTHILLS AS EARLIER EXPECTED. STRONG NORTHEASTERLY WINDS HAVE HELPED TO KEEP THE MOISTURE IN PLACE. THUNDERSTORMS WERE QUICKLY DEVELOPING ALONG THE FOOTHILLS EARLY THIS AFTERNOON...AND THIS TREND SHOULD CONTINUE. THIS UPDATE WILL NOW INLCUDE THE POTENTIAL FOR SEVERE STORMS AND LOCALLY HEAVY RAINFALL ALONG THE FOOTHILLS AND ALSO IN THE DENVER METRO AREA. ENOUGH WIND SHEAR IS PRESENT FOR AN ISOLATED SUPERCELL THUNDERSTORM WHICH MAY PRODUCE A TORNADO. SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING...EXCEPT IN THE FARd NORTHEAST CORNER OF COLORADO WHERE THE ATMOSPHERE IS MORE STABLE. BARJENBRUCH BARJENBRUCH
Special weather statement, Jul 23, 1:45 PM MDT, 47 minutes before
COZ030-032>050-232200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 145 PM MDT TUE JUL 23 1996 ...STRONG THUNDERSTORM WITH VERY HEAVY RAIN NEAR LOVELAND... AT 145 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN AND MARBLE SIZED HAIL ON THE SOUTH SIDE OF LOVELAND. ANOTHER STRONG THUNDERSTORM WITH SMALL HAIL AND HEAVY RAIN WAS LOCATED NEAR FORT COLLINS. THESE STORMS WERE MOVING SLOWLY TO THE SOUTHEAST AT 10 TO 15 MPH. HEAVY RAIN OF UP TO 2 INCHES WITH THESE STORMS WILL PRODUCE MINOR FLOODING OF STREETS AND SMALL STREAMS. NEVER DRIVE...OR WALK... THROUGH RUNNING WATER. n BARJENBRUCH
Special weather statement, Jul 23, 2:14 PM MDT, 18 minutes before
COZ038>047-049-240300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 212 PM MDT TUE JUL 23 1996 ...TORNADO WATCH FOR MUCH OF NORTHEAST COLORADO UNTIL 9 PM MDT... THE TORNADO WATCH INCLUDES AREAS SOUTH OF A LINE FROM JUST SOUTH OF CHEYENNE TO YUMA AND WRAY. IT INCLUDES FORT COLLINS...GREELEY... FORT MORGAN...THE DENVER METRO AREA...CASTLE ROCK...LIMON...AND AKRON. IF THREATENING WEATHER APPROACHES YOUR AREA...MOVE INDOORS AND STAY AWAY FROM WINDOWS. IF A TORNADO IS SPOTTED OR A WARNING IS ISSUED... GO IMMEDIATELY TO YOUR BASEMENT. BARJENBRUCH
Special weather statement, Jul 23, 2:28 PM MDT, 4 minutes before
COZ038>047-049-240300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 230 PM MDT TUE JUL 23 1996 ...TORNADO WATCH FOR MUCH OF NORTHEAST COLORADO UNTIL 9 PM MDT... AT 230 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS OVER WESTERN WELD AND EXTREME EASTERN LARIMER COUNTIES. THE STRONGEST STORMS WERE LOCATED FROM PLATTEVILLE TO NEAR GREELEY. THESE STORMS CONTAINED MARBLE SIZED HAIL AND EXTREMELY HEAVY DOWNPOURS. MINOR STREET AND SMALL STREAM FLOODING CAN BE EXPECTED AS BETWEEN 1 AND 2 INCHES OF RAIN WILL OCCUR WITH THE STRONGEST STORMS. IF THREATENING WEATHER APPROACHES YOUR AREA...MBOVE INDOORS AND STAY AWAY FROM WINDOWS. IF A TORNADO IS SPOTTED OR A WARNING IS ISSUED... GO IMMEDIATELY TO YOUR BASEMENT. BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 2:40 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 35 min |
| Jul 23, 4:31 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 29 min |
| Jul 23, 4:59 PM MDT | Tornado Warning | BOU | Elbert | 31 min |
| Jul 23, 5:06 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 24 min |
| Jul 23, 5:24 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 51 min |
| Jul 23, 5:25 PM MDT | Tornado Warning | BOU | Elbert | 35 min |
| Jul 23, 5:34 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 41 min |
| Jul 23, 5:35 PM MDT | Tornado Warning | BOU | Lincoln | 25 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.