Skip Navigation Linkweather.gov
NOAA logo - Click to go to the NOAA homepage National Weather Service Automated Flood Warning Systems NWS logo - Click to go to the NWS homepage
nav bar left
tab left Precipitation Map Legend tab right
Rain Gauge Rain Gauge
≥ 90% Flash Flood Guidance
≥ 70% Flash Flood Guidance
< 70% Flash Flood Guidance
Flash Flood Guidance Not Available For Location
Observation More Than 24 Hours Old
Out of Service

Last map update: 09/23/2018 at 04:30:02 am EDT
09/23/2018 08:30:02 UTC
What is UTC time?

Map Overlays

Precipitation Collapse

State of Maryland Precipitation Summary

Howard County, MD Rainfall Data (Units in Inches)
Last update: 2018-09-22 19:09:01 EDT
Location Name 15 Min. 30 Min. 1 Hr. 3 Hr. 6 Hr. 12 Hr. 24 Hr.
Alpha Ridge Landfill (arlm2)
Tabular Data (UTC) | Tabular Data (EDT)
------0.00
at Simpsonville (athm2)
Tabular Data (UTC) | Tabular Data (EDT)
-------
Ellicott City (elym2)
Tabular Data (UTC) | Tabular Data (EDT)
---0.000.000.000.00
Lisbon (lsbm2)
Tabular Data (UTC) | Tabular Data (EDT)
--0.080.080.080.080.08
Little Patuxent River at Centennial (ctnm2)
Tabular Data (UTC) | Tabular Data (EDT)
-0.000.040.040.040.040.08
Patapsco River near Elkridge below Patapsco Valley State Park (elkm2)
Tabular Data (UTC) | Tabular Data (EDT)
-0.000.040.040.040.040.08
Savage Park (svgm2)
Tabular Data (UTC) | Tabular Data (EDT)
---0.040.040.040.20
Unnamed Tributary at Retention Pond near Columbia Gateway (cgwm2)
Tabular Data (UTC) | Tabular Data (EDT)
--0.020.030.030.030.29
Area Hydrographs River Observations Map
Resources Collapse
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page Author: NWS Internet Services Team
Disclaimer
Information Quality
Credits
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities