FLOOD06405

• County: Statewide
• Community: Statewide
• Basin: Statewide
• Title: 1995 Colorado Flood Report
• Date: 5/1/1995
• Prepared By: CWCB
• Floodplain - Doc Type: Flood Documentation Report

1. Thirty (30) day Experimental Colorado Weather Window Outlook for
Temperature and Precipitation ( see Figure 1 for an example)

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HENZ METEOROLOGICAL SERVICES

Meteorological Consulting and Weather Forecasting
Mr. Larry Lang July 17, 1995
Colorado Water Conservation Board
1313 Shennan Street
Denver, Colorado 80203

Dear Larry:

This letter covers the voluntary participation ofHenz Meteorological Services ( HMS )
in the person of John Henz on the Colorado Flood Task Force during the 1995 Spring
Snowmelt Flood Threat period of May through June 1995. Participation on the Flood
Task Force began during late April 1995 with a call to yourself and Larry Tunnell of the
National Weather Service (NWS) volunteering my forecasting expertise to the Flood Task
Force. HMS has participated in the Urban Drainage & Flood Control District of Denver,
Colorado's Flash Flood Prediction Program (F2P2) since 1979. The F2P2 is active
from April 15 to September 15 and supports the 6 county Denver Metropolitan area
with heavy precipitation and flash flood prediction services for the 6-county
emergency response community. The F2P2 has been nationally recognized as one of, if
not the best, community flash flood program in the nation. I sincerely appreciate the
opportunity to participate and interact with the other Task Force members and agencies.

HMS volunteered and prepared the following products for use by the Task Force from
April 24 to July 10, ]995:

2. Historical Comparison of the 10,000ft temperature for the Colorado, Dolores,
Rio Grande, Roaring Fork South Platte, Poudre and Arkansas River Basins for
the years of 1957, 1965, 1983, 1984, 1993 and compared these to 1995. ( see
Figure 2 )

3. Seven to thirty (7-30) days oullooks of the basin-specific 10,000 ft temperature
and precipitation to assist in forecastini.: 1995 runoff. (see Figure 3)

4. Basin-specific quantitative Precipitation Forecasts (B/S QPF) for use by the
Flood Task forecast starting with the Memorial Day Weekend and concluding
with the July 1-4 Holiday period. ( see Figure 4)

5. Numerous requests by state agencies for short-term thunderstorm rainfall and
general storm rainfall and snowfall predictions for crucial decision making.

The products described above are all original weather prediction products prepared by
HMS and are not derivative products of the NWS. Rather they are support specific
products prepared for the Colorado Flood Task Force specific needs. As a result these

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