Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 113, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 1, 1998, 9:29 PM MDT for Morgan County, Colorado. It was in force for 41 min. 1 report 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
- Jul 1, 1998, 9:29 PM MDT (03:29 UTC)
- Expired
- Jul 1, 1998, 10:10 PM MDT
- In force
- 41 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Morgan County, CO
The radar
The Denver radar (KFTG), 69 km from the middle of the area, began a volume at 03:28 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 1, 9:55 PM MDT | Hail 0.75 | Wiggins, 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, 3.5 hours before the alert went out and 72 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
- 1351 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 2220 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 020329 RRA
SVRDEN
COC087-020410-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
929 PM MDT WED JUL 1 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN MORGAN COUNTY IN NORTHEAST COLORADO
* UNTIL 1010 PM MDT
* AT 922 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 4 MILES EAST OF WIGGINS...OR ABOUT 11 MILES
WEST OF FORT MORGAN...MOVING EAST AT 5 MILES PER HOUR.
LOCATIONS IN THE WARNING INCLUDE...ADENA SCHOOL...FORT MORGAN...LOG
LANE VILLAGE AND WIGGINS
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHERh FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
LAT...LON 4025 10414 4002 10399 4012 10365 4040 10387
ENTREKINWhat 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
Local storm report, Jul 1, 8:25 PM MDT, 1 hour 4 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
825 PM MDT WED JUL 1 1998
...PRELIMINARY STORM REPORT FOR JULY 1 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0543 PM 7 N NUNN CO 1.00 INCH HAIL
07/01/98 WELD
0548 PM 11 E DENVER INTL ARPT CO 1.50 INCH HAIL
07/01/98 ADAMS
0550 PM 8 NNE NUNN CO 0.75 INCH HAIL
07/01/98 WELD LASTED UNTIL 610 PM
0600 PM 6 S PROSPECT VALLEY CO 1.00 INCH HAIL
07/01/98 ADAMS
0610 PM 13 SW HUGO CO 1.50 INCH HAIL
07/01/98 LINCOLN
0645 PM 3 W PUNKIN CENTER CO 70 MPH TSTM WIND GUST
07/01/98 LINCOLN
0729 PM 5 E CORNISH CO 1.00 INCH HAIL
07/01/98 WELD
GIMMESTADLocal storm report, Jul 1, 8:55 PM MDT, 34 minutes before
LOCAL STORM REPORT...ADDED 645 PM ELBERT COUNTY REPORT
NATIONAL WEATHER SERVICE DENVER CO
855 PM MDT WED JUL 1 1998
...PRELIMINARY STORM REPORT FOR JULY 1 1998..
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0543 PM 7 N NUNN CO 1.00 INCH HAIL
07/01/98 WELD
0548 PM 11 E DENVER INTL ARPT CO 1.50 INCH HAIL
07/01/98 ADAMS
0550 PM 8 NNE NUNN CO 0.75 INCH HAIL
07/01/98 WELD LASTED UNTIL 610 PM
0600 PM 6 S PROSPECT VALLEY CO 1.00 INCH HAIL
07/01/98 ADAMS
0610 PM 13 SW HUGO CO 1.50 INCH HAIL
07/01/98 LINCOLN
0645 PM 3 W PUNKIN CENTER CO 70 MPH TSTM WIND GUST
07/01/98 LINCOLN
0645 PM 6 E KUTCH CO 1.50 INCH HAIL
07/01/98 ELBERT
0729 PM 5 E CORNISH CO 1.00 INCH HAIL
07/01/98 WELD
GIMMESTADThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 6:03 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 42 min |
| Jul 1, 6:27 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 48 min |
| Jul 1, 6:29 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 46 min |
| Jul 1, 6:52 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 53 min |
| Jul 1, 7:15 PM MDT | Tornado Warning | BOU | Weld | 30 min |
| Jul 1, 7:16 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 44 min |
| Jul 1, 7:44 PM MDT | Tornado Warning | BOU | Morgan, Weld | 31 min |
| Jul 2, 5:31 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 29 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.