Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 150, NWS Denver/Boulder, CO

September 3, 1999Morgan County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Sep 3, 1999, 5:13 PM MDT for Morgan County, Weld County, Colorado. It was in force for 32 min. 2 reports 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: Sep 3, 1999, 5:13 PM MDT (23:13 UTC)
Expired: Sep 3, 1999, 5:45 PM MDT
In force: 32 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Morgan County, CO, Weld County, CO

What was reported inside it

Time	Report	Where	Remark
Sep 3, 5:40 PM MDT	Hail 1.75	Gilcrest, CO
Sep 3, 5:55 PM MDT	Hail 1.75	Greeley, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 3, 4:15 PM MDT	Tornado Watch	SPC	6 hr

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.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 3, 3:05 PM MDT, 2 hours 8 minutes earlier.

Area forecast discussion, Sep 3, 3:05 PM MDT, 2 hours 8 minutes before

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In the hours before

Local storm report, Sep 3, 4:26 PM MDT, 47 minutes before

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Local storm report, Sep 3, 4:26 PM MDT, 47 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
 426 PM MDT FRI SEP 03 1999

...PRELIMINARY STORM REPORT FOR SEPTEMBER 03 1999...

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0350 PM    AURORA                    CO   0.75 INCH HAIL
09/03/99   ARAPAHOE

0404 PM    AURORA                    CO   1.00 INCH HAIL
09/03/99   ARAPAHOE

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 2, 6:13 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	47 min
Sep 2, 6:15 PM MDT	Severe Thunderstorm Warning	BOU	Weld	35 min
Sep 2, 6:52 PM MDT	Tornado Warning	BOU	Morgan, Weld	38 min
Sep 2, 7:30 PM MDT	Severe Thunderstorm Warning	BOU	Weld	45 min
Sep 2, 7:46 PM MDT	Tornado Warning	BOU	Weld	44 min
Sep 2, 8:02 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	43 min
Sep 2, 8:22 PM MDT	Tornado Warning	BOU	Morgan	38 min
Sep 2, 8:31 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Weld	44 min
Sep 3, 3:47 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	43 min
Sep 3, 3:47 PM MDT	Severe Thunderstorm Warning	BOU	Weld	43 min
Sep 3, 4:29 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Weld	41 min
Sep 3, 5:02 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Jefferson	43 min
Sep 3, 5:02 PM MDT	Severe Thunderstorm Warning	BOU	Boulder	43 min
Sep 3, 5:25 PM MDT	Severe Thunderstorm Warning	BOU	Weld	35 min
Sep 3, 5:45 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	45 min
Sep 3, 5:45 PM MDT	Severe Thunderstorm Warning	BOU	Weld	45 min
Sep 3, 5:51 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	39 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1999 Every severe thunderstorm warning in 1999

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.