Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 17, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 19, 1998, 9:11 PM MDT for Logan County, Colorado. It was in force for 34 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 19, 1998, 9:11 PM MDT (03:11 UTC)
- Expired
- May 19, 1998, 9:45 PM MDT
- In force
- 34 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Logan County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 19, 9:15 PM MDT | Hail 1 | Sterling, CO | |
| May 19, 9:22 PM MDT | Hail 0.75 | Padroni, 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, 3.2 hours before the alert went out and 108 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
- 22 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 3900 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 26 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 200311 RRA
SVRDEN
COC075-200345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
911 PM MDT TUE MAY 19 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN LOGAN COUNTY IN NORTHEAST COLORADO
* UNTIL 945 PM MDT
* AT 907 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 8 MILES WEST OF NORTH STERLING RESERVOIR...OR
ABOUT 13 MILES NORTHWEST OF STERLING...MOVING NORTHEAST AT 25 MILES
PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE...NORTH STERLING RESERVOIR AND
PEETZ
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK B`EDS 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.
ENTREKIN
LAT...LON 4078 10352 4065 10335 4097 10304 4100 10334What 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, May 19, 7:10 PM MDT, 2 hours 1 minute before
COZ035-036-038>050-200200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 710 PM MDT TUE MAY 19 1998 ...TORNADO WATCH CANCELLED FOR NORTHEAST WELD COUNTY... THE TORNADO WATCH FOR NORTHEAST WELD COUNTY HAS BEEN CANCELLED AT 710 PM MDT. A TORNADO WATCH WHICH COVERS A PORTION OF NORTHEAST COLORADO UNTIL 9 PM MDT STILL REMAINS IN EFFECT FOR LOGAN...SEDGWICK...PHILLIPS AND NORTHERN WASHINGTON COUNTIES. THUNDERSTORMS CONTINUE TO RUMBLE OVER PORTIONS OF NORTHEAST COLORADO AND IN THE NEBRASKA PANHANDLE. THE THUNDERSTORMS IN THE NEBRASKA PANHANDLE REMAIN VERY STRONG AND STILL POSE A THREAT OF STRIKING COLORADO IN LOGAN...SEDGWICK AND PHILLIPS COUNTIES. AT 710 PM MDT A BAND OF WEAK THUNDERSTORMS WERE LOCATED FROM EASTERN ADAMS COUNTY SOUTH THROUGH EASTERN ARAPAHOE COUNTY INTO CENTRAL AND EASTERN ELBERT COUNTIES. THIS BAND IS MOVING EAST AND WILL REACH WASHINGTON COUNTY AROUND 8 PM MDT. THE AIRMASS IN WASHINGTON COUNTY HAS MORE MOISTURE NEAR THE GROUND AND THIS BAND OF THUNDERSTORMS COULD INTENSIFY WHEN IT REACHES THAT AREA WHICH IS WHY THE TORNADO WATCH IS BEING CONTINUED IN THAT COUNTY UNTIL 9 PM MDT. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER RECEIVED THIS AFTERNOON OR EVENING IN COLORADO WEATHER RADAR DETECTED MICROBURST WIND GUSTS BETWEEN 30 AND 45 MPH NEAR ARAPAHOE COUNTY AIRPORT AND ALSO NEAR COMMERCE CITY EARLIER THIS EVENING. END...GCF...WSFO DENVER
Special weather statement, May 19, 7:10 PM MDT, 2 hours 1 minute before
COZ035-036-038>050-200200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 710 PM MDT TUE MAY 19 1998 ...TORNADO WATCH CANCELLED FOR NORTHEAST WELD COUNTY... THE TORNADO WATCH FOR NORTHEAST WELD COUNTY HAS BEEN CANCELLED AT 710 PM MDT. A TORNADO WATCH WHICH COVERS A PORTION OF NORTHEAST COLORADO UNTIL 9 PM MDT STILL REMAINS IN EFFECT FOR LOGAN...SEDGWICK...PHILLIPS AND NORTHERN WASHINGTON COUNTIES. THUNDERSTORMS CONTINUE TO RUMBLE OVER PORTIONS OF NORTHEAST COLORADO AND IN THE NEBRASKA PANHANDLE. THE THUNDERSTORMS IN THE NEBRASKA PANHANDLE REMAIN VERY STRONG AND STILL POSE A THREAT OF STRIKING COLORADO IN LOGAN...SEDGWICK AND PHILLIPS COUNTIES. AT 710 PM MDT A BAND OF WEAK THUNDERSTORMS WERE LOCATED FROM EASTERN ADAMS COUNTY SOUTH THROUGH EASTERN ARAPAHOE COUNTY INTO CENTRAL AND EASTERN ELBERT COUNTIES. THIS BAND IS MOVING EAST AND WILL REACH WASHINGTON COUNTY AROUND 8 PM MDT. THE AIRMASS IN WASHINGTON COUNTY HAS MORE MOISTURE NEAR THE GROUND AND THIS BAND OF THUNDERSTORMS COULD INTENSIFY WHEN IT REACHES THAT AREA WHICH IS WHY THE TORNADO WATCH IS BEING CONTINUED IN THAT COUNTY UNTIL 9 PM MDT. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER RECEIVED THIS AFTERNOON OR EVENING IN COLORADO WEATHER RADAR DETECTED MICROBURST WIND GUSTS BETWEEN 30 AND 45 MPH NEAR ARAPAHOE COUNTY AIRPORT AND ALSO NEAR COMMERCE CITY EARLIER THIS EVENING. END...GCF...WSFO DENVER
Special weather statement, May 19, 8:55 PM MDT, 16 minutes before
COZ048>050-200400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 855 PM MDT TUE MAY 19 1998 ...TORNADO WATCH HAS EXPIRED FOR THE REMAINDER OF FAR NORTHEAST COLORADO... THE TORNADO WATCH WHICH WAS IN EFFECT UNTIL 9 PM FOR LOGAN...SEDGWICK...PHILLIPS...AND NORTHERN WASHINGTON COUNTIES HAS EXPIRED. THE SEVERE THREAT OF TORNADOES HAS DIMINISHED ACROSS NORTH EAST COLORADO...BUT REMAINS ACROSS CENTRAL AND EASTERN PORTIONS OF NEBRASKA. AT 855 PM MDT...A BAND OF THUNDERSTORMS CONTINUED ACAROSS PORTIONS OF WASHINGTON AND LOGAN COUNTIES. SOME MODERATE TO HEAVY RAIN...SMALL HAIL AND GUSTY WINDS TO 40 MPH WILL ACCOMPANY THESE STORMS. ENTREKIN
Special weather statement, May 19, 8:55 PM MDT, 16 minutes before
COZ048>050-200400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 855 PM MDT TUE MAY 19 1998 ...TORNADO WATCH HAS EXPIRED FOR THE REMAINDER OF FAR NORTHEAST COLORADO... THE TORNADO WATCH WHICH WAS IN EFFECT UNTIL 9 PM FOR LOGAN...SEDGWICK...PHILLIPS...AND NORTHERN WASHINGTON COUNTIES HAS EXPIRED. THE SEVERE THREAT OF TORNADOES HAS DIMINISHED ACROSS NORTH EAST COLORADO...BUT REMAINS ACROSS CENTRAL AND EASTERN PORTIONS OF NEBRASKA. AT 855 PM MDT...A BAND OF THUNDERSTORMS CONTINUED ACAROSS PORTIONS OF WASHINGTON AND LOGAN COUNTIES. SOME MODERATE TO HEAVY RAIN...SMALL HAIL AND GUSTY WINDS TO 40 MPH WILL ACCOMPANY THESE STORMS. ENTREKIN
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.