Tropical Storm Norma (1970)

Basin

Eastern Pacific

Dates

August 31, 1970 to September 6, 1970

Peak strength

Tropical Storm, 50 kt (58 mph)

Lowest pressure

992 mb (29.29 inHg)

Landfall

No; closest approach 9 km (6 mi)

Accumulated cyclone energy

3.3

Fastest the center moved

11 kt (13 mph)

Identifier

EP141970

No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.

The Weather Prediction Center attributes 1,371 rain gauge totals over the contiguous United States to this storm. The wettest reached 11.40 inches (290 mm).

WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.

• Hurricane AdeleEastern Pacific · 1970Cat 175 kt
• Tropical Storm BlancaEastern Pacific · 1970Tropical Storm50 kt
• Tropical Storm ConnieEastern Pacific · 1970Tropical Storm45 kt
• Tropical Storm EileenEastern Pacific · 1970Tropical Storm40 kt
• Hurricane FrancescaEastern Pacific · 1970Cat 285 kt · 991 mb
• Tropical Storm GretchenEastern Pacific · 1970Tropical Storm45 kt · 1009 mb
• Tropical Storm HelgaEastern Pacific · 1970Tropical Storm50 kt
• Tropical Storm IoneEastern Pacific · 1970Tropical Storm45 kt
• Tropical Storm IoneEastern Pacific · 1970Tropical Storm50 kt
• Tropical Storm JoyceEastern Pacific · 1970Tropical Storm50 kt
• Tropical Storm ThereseEastern Pacific · 1970Tropical Storm40 kt · 990 mb
• Tropical Storm KristenEastern Pacific · 1970Tropical Storm45 kt
• Hurricane LorraineEastern Pacific · 1970Cat 285 kt · 963 mb
• Tropical Storm MaggieEastern Pacific · 1970Tropical Storm50 kt
• Hurricane DotEastern Pacific · 1970Cat 170 kt
• Tropical Storm OrleneEastern Pacific · 1970Tropical Storm55 kt
• Hurricane PatriciaEastern Pacific · 1970Cat 295 kt · 972 mb
• Tropical Storm RosalieEastern Pacific · 1970Tropical Storm45 kt · 1006 mb
• Tropical Storm SelmaEastern Pacific · 1970Tropical Storm60 kt · 995 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

The National Hurricane Center has published no tropical cyclone report for this storm.

• Wikipedia article: Tropical Storm Norma