Table 3. Dates and types of past 'heavy rain' events across Memphis CWA.


Dates of Events Surface Feature 500 mb Pattern Classification


September 10-11, 1965 Strong low pressure Closed low w/south Tropical
w/cold front (W-E) flow (50 kts) (Betsy)
approaching from NW

February 9-10, 1966 Slow moving cold Strong trough with Synoptic
front (N-S) with strong southwest flow
squall line (80 kts)

May 12-13, 1967 Stationary front (W-E) Strong west zonal Frontal
(6.09" at Greenfield) w/squall line north of flow (75 kts) near
(>3.0" at Corning) frontal boundary weak ridge

November 18-19, 1969 Strong cold front Strong trough w/strong Synoptic
(N-S) southwest flow (100 kts)

October 11-12, 1970 Quasi-stationary front Closed low w/weak Synoptic
(N-S) southwest flow (30 kts)

February 21, 1971 Strong warm front (W-E) Strong closed low with Frontal
moving north strong southwest flow
(100 kts)

September 25, 1972 Thunderstorm outflow Weak southwest flow Mesohigh
(6.23" at Corning) boundary (30 kts) along weak
(isolated event) anticyclone to the east

March 14-16, 1973 Slow moving cold Deepening trough with Synoptic
front (N-S) strong southwest flow (80 kts)

November 26-27, 1973 Developing low along Strong trough w/strong Synoptic
slow moving cold front southwest flow (70 kts)
(N-S)

May 14-15, 1974 Stationary front (W-E) Westerly zonal flow Mesohigh
w/squall line to the south (30-40 kts)

May 31 - June 1, 1974 Developing low along Weak trough w/weak Synoptic
slow moving cold front southwest flow (30 kts)
(N-S)

March 12-13, 1975 Quasi-stationary front Weak ridging w/strong Frontal
(W-E) w/developing low southwest flow (70 kts)

March 27-28, 1975 Warm front moving Closed low with Frontal
(7.22" at Corning) north (W-E) becoming southwest flow (50 kts)
(>3.0" at Greenfield) quasi-stationary

March 3, 1977 Slow moving cold Closed low w/strong Synoptic
front (N-S) southwest flow (70-80 kts)

May 6-7, 1978 Warm front (W-E) Closed low with Frontal
moving north southwest flow (40kts)

December 2-3, 1978 Strong cold front Strong trough w/strong Synoptic
(N-S) southwest flow (60-70 kts)

April 11-12, 1979 Cold front (N-S) assoc. Closed low w/strong Synoptic
w/strong low southwest flow (50-60 kts)

March 16-17, 1980 Strong cold front (N-S) Strong trough w/strong Synoptic
with squall line southwest flow (70 kts)

June 23-24, 1980 Quasi-stationary Closed low with weak Mesohigh
(7.1" at Clarksdale) front (W-E) north flow (20-30 kts)
(>3.0" at Memphis)

July 21-22, 1980 Slow moving weak Weak trough w/weak Mesohigh
cold front (N-S) west flow (20 kts)

October 17-18, 1981 Quasi-stationary front Deepening trough Synoptic
(W-E) w/strong cold w/strong west flow
front (N-S) (60-70 kts)

September 12-13, 1982 Low pressure Weak southwest flow Tropical
(11.9" at Greenfield) system (20 kts) (Chris)
(isolated event)

December 3-4, 1982 Slow moving cold Strong closed low with Synoptic
front (N-S) south flow (50 kts)

April 4-5, 1983 Slow moving cold Closed low with Synoptic
front (N-S) southwest flow (50 kts)

May 18-19, 1983 Warm front (W-E) Closed low w/strong Synoptic
(6.4" at Booneville) moving north w/cold southwest flow (50-60 kts)
(>3.0" at Aberdeen) front (N-S) later

December 2-3, 1983 Developing low along Weak trough approaching Frontal
stationary front (W-E) from west w/weak ridging
and southwest flow (50 kts)

October 6, 1984 Thunderstorm outflow Weak trough with weak Mesohigh
(6.0" at Clarksdale) boundaries southwest flow (30 kts)
(>3.0" at Greenfield)

October 22, 1984 Slow moving cold Strong trough w/strong Synoptic
(7.4" at Aberdeen) front (N-S) southwest flow (60 kts)
(isolated event)

November 7-8, 1986 Cold front (N-S) Strong trough w/strong Synoptic
with squall line southwest flow (70 kts)

November 16, 1987 Cold front (N-S) Strong trough w/strong Synoptic
with squall line south flow (70 kts)

December 24-25, 1987 Strong warm front Closed low with Frontal
(6.42" at Jackson) (W-E) ahead of slow southwest flow (50 kts)
(isolated event) moving cold front

July 1-2, 1989 Slow moving low Closed low with weak Tropical
pressure system west flow (20 kts) (Allison)

February 3, 1990 Quasi-stationary front Strong trough w/strong Synoptic
(6.1" at Clarksdale) (N-S) ahead of strong southwest flow (80 kts)
(>3.0" at Booneville) cold front (N-S)

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