Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 201, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 28, 1996, 6:43 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado. It was in force for 47 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 28, 1996, 6:43 PM MDT (00:43 UTC)
- Expired
- Jul 28, 1996, 7:30 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO
The radar
The Goodland radar (KGLD), 170 km from the middle of the area, began a volume at 00:46 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 |
|---|---|---|---|
| Jul 28, 7:38 PM MDT | Hail 1.75 | Fleming, 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, 0.7 hours before the alert went out and 109 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
- 83 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 2683 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -121 m²/s²
- 0-3 km storm-relative helicity
- -101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 290042
SVRDEN
COC075-095-115-290130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
643 PM MDT SUN JUL 28 1996
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
EASTERN LOGAN...PHILLIPS AND WESTERN SEDGWICK
INCLUDING THE FOLLOWING LOCATIONS
CROOK...FAIRFIELD...FLEMING...HAXTUN...HIGHLAND CENTER...
HOLYOKE...MARKS BUTTE...OVID...PAOLI...PROCTOR...SEDGWICK...ST
PETERS...TWIN BUTTES AND WAGES
AT 640 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 4 MILES NORTH OF TWIN BUTTES...OR ABOUT 32 MILES
NORTHEAST OF STERLING.
THE STORM WAS MOVING SOUTHEAST AT 30 MILES PER HOUR.
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
TORNADOS ARE ALSO POSSIBLE WITH THIS STORM. A TORNADO WATCH IS IN
EFFECT UNTIL 9PM THIS EVENING.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
HOLZINGER
LAT...LON 4049 10218 4047 10289 4101 10308 4100 10237What 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 28, 2:11 PM MDT, 4 hours 32 minutes before
COZ030-032>050-290600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 210 PM MDT SUN JULY 28 1996 ...TORNADO WATCH UNTIL 9 PM MDT FOR PORTIONS OF NORTHEAST COLORADO... 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 A TORNADO WATCH HAS BEEN ISSUED UNTIL 9PM MDT FOR THE FOLLOWING COUNTIES: LOGAN...MORGAN...SEDGWICK...NORTHERN WASHINGTON AND EASTERN WELD COUNTIES. THE WATCH INCLUDES BUT IS NOT LIMITED TO THE FOLLOWING LOCATIONS: AKRON...FORT MORGAN...HOLYOKE...ROGGEN... STERLING AND JULESBURG. A MOIST NORTHWESTERLY FLOW ALOFT WILL BE OVER NORTHEASTERN COLORADO THIS AFTERNOON AND EVENING. THE BEST SOURCE OF LOW LEVEL MOISTURE WILL REMAIN IN THE NORTHEASTERN PLAINS...MAINLY NORTH AND EAST OF A LINE FROM HEREFORD IN NORTHCENTRAL WELD COUNTY TO FORT MORGAN TO AROUND ELBA IN CENTRAL WASHINGTON COUNTY. A WEAK UPPER LEVEL DISTURBANCE IS EXPECTED TO MOVE INTO EASTERN WYOMING LATE THIS AFTERNOON...THIS MAY BE ENOUGH TO HELP SPAWN A FEW SEVERE STORMS IN THE NORTHEASTERN PLAINS LATE THIS AFTERNOON AND EVENING. A FEW SEVERE STORMS MAY DEVELOP EAST OF THE LINE MENTIONED EARLIER. ISOLATED TORNADOS...LARGE HAIL...DAMAGING WINDS IN EXCESS OF 60 MPH AND VERY HEAVY RAIN ARE POSSIBLE WITH THESE STORMS. SPOTTER ACTIVATION MAY BE NEEDED FOR MORGAN AND PHILLIPS COUNTIES AFTER 5PM THIS AFTERNOON. AT 200 PM...DOPPLER RADAR INDICATED WIDELY SCATTERED THUNDERSTORM DEVELOPING IN THE FOOTHILLS...THE STRONGEST STORMS WERE LOCATED OVER SOUTHERN JEFFERSON...PARK AND DOUGLAS COUNTIES. THESE STORMS WERE MOVING EAST SOUTHEAST AT 10 TO 15 MPH. SMALL HAIL...STRONG GUSTY WINDS...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN ARE POSSIBLE WITH THE STORMS. SEEK SHELTER IF A STORM APPROACHES YOUR AREA. FMC
Special weather statement, Jul 28, 2:55 PM MDT, 3 hours 48 minutes before
COZ035-038-282130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT SUN JUL 28 1996 ...STRONG THUNDERSTORM IN NORTHEASTERN LARIMER COUNTY... AT 250 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 14 MILES WEST NORTHWEST OF NATURAL FORT REST AREA...OR ABOUT 30 MILES NORTH OF FORT COLLINS...ALONG THE COLORADO/WYOMING BORDER. THE STORM WAS MOVING SOUTHEAST AT 10 TO 15 MILES PER HOUR. PERSONS IN OR NEAR CARR...NATURAL FORT REST AREA...ROCKPORT AND WELLINGTON SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS TO 50 MPH ARE POSSIBLE WITH THIS STORM. SEEK SHELTER IF THE STORM APPRACHES YOUR AREA. FMC
Special weather statement, Jul 28, 3:31 PM MDT, 3 hours 12 minutes before
COZ035-038-282215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 330 PM MDT SUN JUL 28 1996 ...STRONG THUNDERSTORMS CONTINUE IN EXTREME NORTHEASTERN LARIMER AND NORTHWESTERN WELD COUNTIES... STRONG THUNDERSTORMS CONTINUE TO DISSIPATE AND REDEVELOP ALONG THE COLORADO/WYOMING BORDERS. AT 324 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 2 MILES SOUTHWEST OF NATURAL FORT REST AREA...OR ABOUT 26 MILES NORTH OF FORT COLLINS. THE STORM WAS MOVING SOUTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR CARR...NATURAL FORT REST AREA AND ROCKPORT SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND STRONG GUSTY WINDS WILL OCCUR WITH THIS STORM. SEEK SHELTER IF A STORM APPROACHES YOUR AREA. FMC
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 6:08 PM MDT | Tornado Warning | BOU | Adams, Denver, Weld | 37 min |
| Jul 28, 6:35 PM MDT | Tornado Warning | BOU | Adams, Weld | 25 min |
| Jul 28, 6:37 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 53 min |
| Jul 28, 6:56 PM MDT | Tornado Warning | BOU | Adams, Denver | 34 min |
| Jul 28, 7:03 PM MDT | Tornado Warning | BOU | Adams, Arapahoe | 27 min |
| Jul 28, 7:30 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips | 45 min |
| Jul 28, 8:32 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 43 min |
| Jul 28, 8:58 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 47 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.