TROPICAL STORM ISAIAS - climateimpactcompany.com · ISAIAS BRINGS FLASH FLOODING TO BGE • At 2PM...
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TROPICAL STORM ISAIAS
By Climate Impact Company
August 2, 2020 3:00PM EDT
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ISAIAS BRINGS FLASH FLOODING TO BGE
• At 2PM EDT Tropical Storm Isaias was located at 27.4N/79.7W or 45 mi. east-
southeast of Vero Beach, FL.
• Isaias is moving north-northwest at 9 mph with top wind 65 mph and surface pressure
995 MB.
• Comment: Isaias looks stronger. Usually recurving TC’s temporarily strengthen.
NOAA/NHC underestimating intensity for Southeast coast (and possibly Mid-Atlantic).
• Baltimore Gas and Electric can expect an ALERT 4 episode due to excessive rainfall
(4-7 in.). Maximum wind gust is forecast at 50 mph (ALERT 2).
• Onset of weather associated with Isaias is Monday evening, peaking Tuesday daytime
and abating late Tuesday.
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LATEST NOAA FORECAST TRACKNOAA 5-day forecast with
caveats…
Tropical storm force wind profile
forecast…
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TUESDAY IS THE PRIMARY FLOOD RISK DAY
NOAA Tuesday rainfall forecast…
NOAA Tuesday flash flood risk
forecast…
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BGE WEATHER SCORECARD FOR T.S. ISAIAS
Time Weather Hazards Wind/Gust Alert
6PM MON to Midn Showers/Storms
(1 in. by midn)
None S 5-15 Borderline ALERT
1 (rain)
Midn to 6AM TUE Heavy rain/Storms
(1-2 in.)
Flooding
developing
E 8-18 Borderline ALERT
3 (rain)
6AM TUE to Noon Heavy rain/Storms
1-2 in. of rain
Wind/Flooding NE to N 16-27G45 ALERT 4 (rain)
Noon to 6PM TUE Heavy rain (1-2
in.)
Wind/Flooding NW to W 20-33
G40-50
ALERT 4 (rain)
6PM TUE to Midn Few showers Wind/Flood abate W to SW 8-18 ALL CLEAR 9PM
Storm Totals 4-7 in. rain Wind
damage/Flooding
Max gust 50 mph
Noon-2PM TUE
An ALERT 4 Event