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St. Louis, MO

Weather Forecast Office

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Overview

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Watches, Warnings, and Advisories

National Map	Local Map: All Hazards	Severe Thunderstorm & Tornado	Flood
Extreme Cold	Extreme Heat	Winter Weather	Fire Weather
Wind	Air Quality	Dense Fog	Frost

Decision Support Services Briefing Packets

Springfield DSSPacket (link)	Kansas City DSSPacket (link)
St. Louis DSSPacket (link)	Davenport DSSPacket (link)
Paducah DSSPacket (link)	Memphis DSSPacket (link)

Active Weather Stories

Current Conditions

Local Radar

Surface Observations and Road Conditions

State Forecast

Day 1 Forecasts

Maximum Temperature	Minimum Temperature	Max Wind Gust
Heat Index	Wind Chill

Day 2 Forecasts

Maximum Temperature	Minimum Temperature	Max Wind Gust
Heat Index	Wind Chill

Day 3 Forecasts

Maximum Temperature	Minimum Temperature	Max Wind Gust
Heat Index	Wind Chill

Days 1-3 Forecast Precipitation

Storm Total (Days 1 -3) Forecast Precipitation	Storm Total (Days 1 -3) Forecast Ice	Storm Total (Days 1 -3) Forecast Snow

Thunderstorms

Storm Prediction Center Missouri Severe Weather Outlooks

SPC Convective Outlook for Missouri: Day 1	SPC Convective Outlook for Missouri: Day 2	SPC Convective Outlook for Missouri: Day 3

Storm Prediction Center National Severe Weather Outlooks

SPC Convective Outlook: Day 1	SPC Convective Outlook: Day 1 Tornado Probabilities "Probability of a tornado within 25 miles of a point. Hatched area denotes 10%+ probability of EF2-EF5 tornadoes within 25 miles of a point." (SPC)	SPC Convective Outlook: Day 1 Wind Probabilities "Probability of damaging thunderstorm winds or wind gusts of 50 knots (58 mph) or higher within 25 miles of a point. Hatched area denotes 10% or greater probability of wind gusts 65 knots (75 mph) or greater within 25 miles of a point." (SPC)	SPC Convective Outlook: Day 1 Hail Probabilities "Probability of one inch diameter hail or larger within 25 miles of a point. Hatched area denotes 10% or greater probability of two inch diameter hail or larger within 25 miles of a point." (SPC)
SPC Convective Outlook: Day 2	SPC Convective Outlook: Day 2 Tornado Probabilities "Probability of a tornado within 25 miles of a point. Hatched area denotes 10%+ probability of EF2-EF5 tornadoes within 25 miles of a point." (SPC)	SPC Convective Outlook: Day 2 Wind Probabilities "Probability of damaging thunderstorm winds or wind gusts of 50 knots (58 mph) or higher within 25 miles of a point. Hatched area denotes 10% or greater probability of wind gusts 65 knots (75 mph) or greater within 25 miles of a point." (SPC)	SPC Convective Outlook: Day 2 Hail Probabilities "Probability of one inch diameter hail or larger within 25 miles of a point. Hatched area denotes 10% or greater probability of two inch diameter hail or larger within 25 miles of a point." (SPC)
SPC Convective Outlook: Day 3	SPC Convective Outlook: Day 4	Mesoscale Discussion

Observed Storm Damage

		Storm Survey Information
Yesterday's SPC Storm Reports	Today's SPC Storm Reports

Heavy Precipitation & Flooding

Weather Prediction Center Excessive Rainfall Outlooks

Excessive Rainfall Outlook: Day 1	Excessive Rainfall Outlook: Day 2	Excessive Rainfall Outlook: Day 3	Excessive Rainfall Outlook: Day 4
Excessive Rainfall Outlook: Day 5	Mesoscale Precipitation Discussion

Precipitation Forecasts

24 Hour Precipitation Forecast: Day 1	24 Hour Precipitation Forecast: Day 2	24 Hour Precipitation Forecast: Day 3	Day 1-7 Total Precipitation Forecast
Missouri 24 Hour Precipitation Forecast	Missouri 48 Hour Precipitation Forecast	Missouri 72 Hour Precipitation Forecast	Missouri 96 Hour Precipitation Forecast
Missouri 120 Hour Precipitation Forecast

Precipitation Outlooks

Next Week's Risk of Heavy Precipitation	6-10 Day Precipitation Outlook	8-14 Day Precipitation Outlook	3-4 Week Precipitation Outlook
One Month Precipitation Outlook	Three Month Precipitation Outlook

Observed Precipitation

Missouri 24 Hour Observed Precipitation	Missouri 48 Hour Observed Precipitation	Missouri 72 Hour Observed Precipitation	Missouri 96 Hour Observed Precipitation
Missouri 120 Hour Observed Precipitation	Missouri Estimated Precipitation	24 Hour Precipitation Totals	7 Day Precipitation Totals
7 Day Accumulated Precipitation Percent of Mean	30 Day Precipitation Totals	30 Day Accumulated Precipitation Percent of Mean

River Forecasts

		Missouri River Forecast Points (National Water Prediction Service)
Observed River Flooding (Missouri) [Updated every 1-2 hours from 9AM through 9PM]	Forecasted River Flooding (Missouri) [Updated every 1-2 hours from 9AM through 9PM]

Heat

Days 1-7 Temperature and Heat Index Forecast

Day 1 Maximum Temperature	Day 1 Heat Index	Day 2 Maximum Temperature	Day 2 Heat Index
Day 3 Maximum Temperature	Day 3 Heat Index	Day 4 Maximum Temperature	Day 4 Heat Index
Day 5 Maximum Temperature	Day 5 Heat Index	Day 6 Maximum Temperature	Day 6 Heat Index
Day 7 Maximum Temperature	Day 7 Heat Index

Temperature Outlooks

Next Week's Risk of Hazardous Temperatures	6-10 Day Temperature Outlook	8-14 Day Temperature Outlook	3-4 Week Temperature Outlook
One Month Temperature Outlook	Three Month Temperature Outlook

Fire Weather

Fire Weather Outlooks

Fire Weather Outlook: Day 1	Fire Weather Outlook: Day 2	Fire Weather Outlook: Day 3	Fire Weather Outlook: Day 4
Fire Weather Outlook: Day 5	Fire Weather Outlook: Day 6	Fire Weather Outlook: Day 7	Fire Weather Outlook: Day 8

Fire Weather Guidance

Day 1 Minimum Relative Humidity (RH)	Day 1 Maximum Wind Gust	Day 2 Minimum Relative Humidity (RH)	Day 2 Maximum Wind Gust
Day 3 Minimum Relative Humidity (RH)	Day 3 Maximum Wind Gust	Estimated 24 Hour Past Precipitation	Total Forecasted Precipitation Days 1-7

Fire Weather Indices

Drought Monitor: Missouri	Keetch-Byram Drought Index	KBDI Departures from Normal
Day 1: Significant Fire Potential	Day 2: Significant Fire Potential	Day 3: Significant Fire Potential	Day 4: Significant Fire Potential
			Fire Environment Mapping System
Day 5: Significant Fire Potential	Day 6: Significant Fire Potential	Day 7: Significant Fire Potential

Climate Guidance (CPC)

Next Week's Risk of Heavy Precipitation	6-10 Day Precipitation Outlook	8-14 Day Precipitation Outlook	3-4 Week Precipitation Outlook
1 Month Temperature Outlook	1 Month Precipitation Outlook	3 Month Temperature Outlook	3 Month Precipitation Outlook

Location Specific Forecasts for Mark Twain National Forecast

Zone 1: Potosi, MO Zone 2: Doniphan, MO Zone 3: Eagle Rock, MO

Zone 3: Ava, MO Zone 3: Ashland, MO Zone 3: Ft. Leonard Wood, MO

Drought Conditions

Drought Monitor

			Evaporative Demand Drought Index (EDDI)
Drought Monitor: Missouri	Keetch-Byram Drought Index	KBDI Departures from Normal	The Evaporative Demand Drought Index is an experimental drouht monitoring and early warning duiance tool. It analyzes the atmospheric evaporative demand ("thirst of the atmosphere) over space and time and can be used to identify areas that will see increased moisture loss from evaporation (but does not take additional rainfall into account).
Number of Days Since Last Observed Precipitation >0.01"	Number of Days Since Last Observed Precipitation >0.10"	Number of Days Since Last Observed Precipitation >0.25	Number of Days Since Last Observed Precipitation >0.50
Number of Days Since Last Observed Precipitation >1.0"

Climate Guidance (CPC)

Next Week's Risk of Heavy Precipitation	6-10 Day Precipitation Outlook	8-14 Day Precipitation Outlook	3-4 Week Precipitation Outlook
1 Month Temperature Outlook	1 Month Precipitation Outlook	3 Month Temperature Outlook	3 Month Precipitation Outlook

Cold Weather

Day 1-7 Minimum Temperature and Wind Chill Forecast

Day 1 Minimum Temperature	Day 1 Wind Chill	Day 2 Minimum Temperature	Day 2 Wind Chill
Day 3 Minimum Temperature	Day 3 Wind Chill	Day 4 Minimum Temperature	Day 4 Wind Chill
Day 5 Minimum Temperature	Day 5 Wind Chill	Day 6 Minimum Temperature	Day 6 Wind Chill
Day 7 Minimum Temperature	Day 7 Wind Chill

Temperature Outlooks

Next Week's Risk of Hazardous Temperatures	6-10 Day Temperature Outlook	8-14 Day Temperature Outlook	3-4 Week Temperature Outlook
One Month Temperature Outlook	Three Month Temperature Outlook

Temperature Resources

Winter Weather

Missouri Probabilistic Snowfall and Ice Forecast

Day 1-3 Storm Total Snow Forecast	Day 1-3 Storm Total Ice Forecast	Day 1-3 Probability of 1 in 10 Chance (10%) of Higher Snowfall	Day 1-3 Probability of 9 in 10 Chance of (90%) of Higher Snowfall

Probability of Exceedance Snowfall Forecast

Day 1-3 Percent Chance of 0.1+" Snow	Day 1-3 Percent Chance of 1+" Snow	Day 1-3 Percent Chance of 2+" Snow	Day 1-3 Percent Chance of 4+" Snow
Day 1-3 Percent Chance of 6+" Snow	Day 1-3 Percent Chance of 8+" Snow	Day 1-3 Percent Chance of 12+" Snow	Day 1-3 Percent Chance of 18+" Snow

National Probability of Snowfall Forecast

Probability of at Least 4 Inches of Snow: Day 1	Probability of at Least 4 Inches of Snow: Day 2	Probability of at Least 4 Inches of Snow: Day 3
Probability of Exceeding 0.25 Inches of Snow: Day 4	Probability of Exceeding 0.25 Inches of Snow: Day 5	Probability of Exceeding 0.25 Inches of Snow: Day 6	Probability of Exceeding 0.25 Inches of Snow: Day 7/td>

Observed Snowfall

24 Hour Observed Snowfall	24 Hour Observed Snow Depth	7 Day Total Snowfall	7 Day Total Snowfall Percent of Mean
Month to Date Accumulated Snowfall	Month to Date Accumulated Snowfall Percent of 1991-2020 Normals	Season to Date Accumulated Snowfall	Season to Date Accumulated Snowfall Percent of 1991-2020 Normals
Midwest Seasonal Snowfall Analysis (Estimated)	Midwest Normal Annual Snowfall (1991-2020)

LSX RSS Feed

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CURRENT CONDITIONS Observations Snow Cover Snowfall Analysis Precip Analysis Road Conditions

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Hydrology Rivers and Lakes

Weather Safety Safety and Preparedness Information Weather Radio StormReady Weather-Ready Nation Ambassador Program

LOCAL PROGRAMS Items of Interest Education Resources Coop Observer

Contact Us Contact Info

US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service St. Louis, MO 12 Missouri Research Park Drive St. Charles, MO 63304-5685 636-441-8467 Comments? Questions? Please Contact Us.