Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 92, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 22, 1998, 4:04 PM MDT for Adams County, Weld County, Colorado. It was in force for 26 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
- Jun 22, 1998, 4:04 PM MDT (22:04 UTC)
- Expired
- Jun 22, 1998, 4:30 PM MDT
- In force
- 26 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 50 km from the middle of the area, began a volume at 22:03 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 |
|---|---|---|---|
| Jun 22, 4:14 PM MDT | Hail 0.75 | Hudson, 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, 10.1 hours before the alert went out and 104 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
- 37 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 1519 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 17 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, Jun 22, 11:00 AM MDT, 5 hours 4 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT MON JUN 22 1998 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 SYNOPSIS: ABUNDANT MOISTURE IS AVAILABLE IN THE LOWER LAYERS OF THE ATMOSPHERE...MAINLY EAST OF A LINE FROM ABOUT GREELEY TO LIMON. AS THE AIRMASS OVER COLORADO CONTINUES TO WARM...THE ATMOSPHERE WILL BECOME UNSTABLE. A WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA THIS AFTERNOON...WITH THUNDERSTORMS FIRST DEVELOPING OVER THE MOUNTAINS AND ALONG THE FOOTHILLS BY 2PM. THE STORMS WILL THEN MOVE NORTHEAST ONTO THE PLAINS BY 4PM. THE GREATEST POTENTIAL FOR SEVERE WEATHER WILL BE EAST OF THE GREELEY TO LIMON LINE...WITH THE PRIMARY THREAT BEING HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS TO 70 MPH. HOWEVER...ISOLATED SHORT LIVED TORNADOES CANNOT BE RULED OUT...ESPECIALLY ALONG THE GREELEY TO LIMON LINE. THE SEVERE WEATHER THREAT WILL SHIFT EAST DURING THE EVENING HOURS. IN ADDITION...HEAVY RAIN IS POSSIBLE LATE THIS EVENING IN WASHINGTON...LOGAN...SEDGWICK AND PHILLIPS COUNTIES. SEVERE THUNDERSTORMS ARE NOT EXPECTED IN THE DENVER OR FORT COLLINS AREAS...BUT SOME OF THE STORMS COULD PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH ALONG WITH BRIEF HEAVY RAIN. WE ARE EXPECTING TO ACTIVATE THE SPOTTER NETWORK BY 2PM. LESZCYNSKI THERE IS A THREAT OF SEVERE WEATHER LATE THIS AFTERNOON EAST OF A LINE FROM ABOUT GREELEY TO LIMON.
Special weather statement, Jun 22, 11:00 AM MDT, 5 hours 4 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT MON JUN 22 1998 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 SYNOPSIS: ABUNDANT MOISTURE IS AVAILABLE IN THE LOWER LAYERS OF THE ATMOSPHERE...MAINLY EAST OF A LINE FROM ABOUT GREELEY TO LIMON. AS THE AIRMASS OVER COLORADO CONTINUES TO WARM...THE ATMOSPHERE WILL BECOME UNSTABLE. A WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA THIS AFTERNOON...WITH THUNDERSTORMS FIRST DEVELOPING OVER THE MOUNTAINS AND ALONG THE FOOTHILLS BY 2PM. THE STORMS WILL THEN MOVE NORTHEAST ONTO THE PLAINS BY 4PM. THE GREATEST POTENTIAL FOR SEVERE WEATHER WILL BE EAST OF THE GREELEY TO LIMON LINE...WITH THE PRIMARY THREAT BEING HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS TO 70 MPH. HOWEVER...ISOLATED SHORT LIVED TORNADOES CANNOT BE RULED OUT...ESPECIALLY ALONG THE GREELEY TO LIMON LINE. THE SEVERE WEATHER THREAT WILL SHIFT EAST DURING THE EVENING HOURS. IN ADDITION...HEAVY RAIN IS POSSIBLE LATE THIS EVENING IN WASHINGTON...LOGAN...SEDGWICK AND PHILLIPS COUNTIES. SEVERE THUNDERSTORMS ARE NOT EXPECTED IN THE DENVER OR FORT COLLINS AREAS...BUT SOME OF THE STORMS COULD PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH ALONG WITH BRIEF HEAVY RAIN. WE ARE EXPECTING TO ACTIVATE THE SPOTTER NETWORK BY 2PM. LESZCYNSKI THERE IS A THREAT OF SEVERE WEATHER LATE THIS AFTERNOON EAST OF A LINE FROM ABOUT GREELEY TO LIMON.
Special weather statement, Jun 22, 11:10 AM MDT, 4 hours 54 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1110 AM MDT MON JUN 22 1998 ...CORRECTION TO DELETE LAST TWO LINES... 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 SYNOPSIS: ABUNDANT MOISTURE IS AVAILABLE IN THE LOWER LAYERS OF THE ATMOSPHERE...MAINLY EAST OF A LINE FROM ABOUT GREELEY TO LIMON. AS THE AIRMASS OVER COLORADO CONTINUES TO WARM...THE ATMOSPHERE WILL BECOME UNSTABLE. A WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA THIS AFTERNOON...WITH THUNDERSTORMS FIRST DEVELOPING OVER THE MOUNTAINS AND ALONG THE FOOTHILLS BY 2PM. THE STORMS WILL THEN MOVE NORTHEAST ONTO THE PLAINS BY 4PM. THE GREATEST POTENTIAL FOR SEVERE WEATHER WILL BE EAST OF THE GREELEY TO LIMON LINE...WITH THE PRIMARY THREAT BEING HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS TO 70 MPH. HOWEVER...ISOLATED SHORT LIVED TORNADOES CANNOT BE RULED OUT...ESPECIALLY ALONG THE GREELEY TO LIMON LINE. THE SEVERE WEATHER THREAT WILL SHIFT EAST DURING THE EVENING HOURS. IN ADDITION...HEAVY RAIN IS POSSIBLE LATE THIS EVENING IN WASHINGTON...LOGAN...SEDGWICK AND PHILLIPS COUNTIES. SEVERE THUNDERSTORMS ARE NOT EXPECTED IN THE DENVER OR FORT COLLINS AREAS...BUT SOME OF THE STORMS COULD PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH ALONG WITH BRIEF HEAVY RAIN. WE ARE EXPECTING TO ACTIVATE THE SPOTTER NETWORK BY 2PM. LESZCYNSKI
Special weather statement, Jun 22, 11:10 AM MDT, 4 hours 54 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1110 AM MDT MON JUN 22 1998 ...CORRECTION TO DELETE LAST TWO LINES... 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 SYNOPSIS: ABUNDANT MOISTURE IS AVAILABLE IN THE LOWER LAYERS OF THE ATMOSPHERE...MAINLY EAST OF A LINE FROM ABOUT GREELEY TO LIMON. AS THE AIRMASS OVER COLORADO CONTINUES TO WARM...THE ATMOSPHERE WILL BECOME UNSTABLE. A WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA THIS AFTERNOON...WITH THUNDERSTORMS FIRST DEVELOPING OVER THE MOUNTAINS AND ALONG THE FOOTHILLS BY 2PM. THE STORMS WILL THEN MOVE NORTHEAST ONTO THE PLAINS BY 4PM. THE GREATEST POTENTIAL FOR SEVERE WEATHER WILL BE EAST OF THE GREELEY TO LIMON LINE...WITH THE PRIMARY THREAT BEING HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS TO 70 MPH. HOWEVER...ISOLATED SHORT LIVED TORNADOES CANNOT BE RULED OUT...ESPECIALLY ALONG THE GREELEY TO LIMON LINE. THE SEVERE WEATHER THREAT WILL SHIFT EAST DURING THE EVENING HOURS. IN ADDITION...HEAVY RAIN IS POSSIBLE LATE THIS EVENING IN WASHINGTON...LOGAN...SEDGWICK AND PHILLIPS COUNTIES. SEVERE THUNDERSTORMS ARE NOT EXPECTED IN THE DENVER OR FORT COLLINS AREAS...BUT SOME OF THE STORMS COULD PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH ALONG WITH BRIEF HEAVY RAIN. WE ARE EXPECTING TO ACTIVATE THE SPOTTER NETWORK BY 2PM. LESZCYNSKI
Special weather statement, Jun 22, 11:15 AM MDT, 4 hours 49 minutes before
COZ030-032>050-220600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1115 AM MDT SUN JUN 22 1998 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 SYNOPSIS: ABUNDANT MOISTURE WILL MOVE INTO THE AREA AT THE SAME TIME A WEAK UPPER LEVEL DISTURBANCE MOVES IN. THIS AND DAYTIME HEATING WILL CAUSE SCATTERED THUNDERSTORMS TO OCCUR. THE STRONGEST STORMS WILL BE MAINLY ALONG THE PALMER DIVIDE AND SOUTHEAST OF I-76. HAIL AND DAMAGING WINDS ARE POSSIBLE SO SPOTTER ACTIVATION MAY BE NEEDED. TA
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 3:43 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 47 min |
| Jun 22, 5:16 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 44 min |
| Jun 22, 5:33 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Jefferson | 42 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1998Every severe thunderstorm warning in 1998
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.