Alert archive / Oregon / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 4, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Aug 4, 2003, 5:11 PM PDT for Josephine County, Oregon. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2003, 5:11 PM PDT (00:11 UTC)
- Expired
- Aug 4, 2003, 6:00 PM PDT
- In force
- 49 min
- Issued by
- NWS Medford, OR
- Area
- Counties, with a storm outline in the text
County Josephine County, OR
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 0.2 hours before the alert went out and 74 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 311 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 2975 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
382 WUUS56 KMFR 050011 SVRMFR ORC033-050100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 510 PM PDT MON AUG 4 2003 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... JOSEPHINE COUNTY IN SOUTHWEST OREGON * UNTIL 600 PM PDT * AT 510 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SELMA...OR ABOUT 12 MILES NORTH OF CAVE JUNCTION...MOVING NORTH AT 5 MPH. LARGE HAIL IS THE PRIMARY THREAT WITH THIS STORM. * THE SEVERE THUNDERSTORM WILL BE... OVER RURAL JOSEPHINE COUNTY AT 540 PM PDT IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MEDFORD. LAT...LON 4225 12379 4225 12355 4253 12351 4252 12384 $$ SANDLER
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Medford, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 2:30 PM PDT, 2 hours 41 minutes earlier.
Area forecast discussion, Aug 4, 2:30 PM PDT, 2 hours 41 minutes before
SOUTHWEST OREGON AND NORTHERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD, OR 230 PM PDT MON AUG 4 2003 ABUNDANT LOW LEVEL MOISTURE AND MID TO UPPER LEVEL DIFFLUENCE ALONG WITH A MODEST 60 KNOT JET AT 250MB WILL EXTEND THUNDER STORMS WELL INTO THE EVENING OVER MOST OF OUR FORECAST AREA EXCLUDING THE COAST. TUESDAY A STRONG MID TO UPPER LEVEL LOW AND A COOL POOL OF AIR AT 500MB WILL SPREAD CLOUDS AND RAINSHOWERS OVER NORTHWEST CALIFORNIA AND SOUTHWEST OREGON. FURTHER EAST THERE MAY BE ENOUGH SUNSHINE TO GENERATE ISOLATED THUNDERSTORMS. THE BEST AREA OF DYNAMICS AND INSTABILITY FOR THUNDERSTORMS WILL BE LOCATED NORTHEAST OF OUR AREA. WEDNESDAY A WEAKER MID LEVEL DISTURBANCE MOVES INTO NORTHERN CALIFORNIA BUT WILL LIKELY BRING MAINLY MID AND HIGH CLOUDS WITH ISOLATED LIGHT RAINSHOWERS. THURSDAY A COLD FRONT REACHES THE COAST WITH LIGHT RAIN BUT WEAKENS QUICKLY AS IT EVOLVES INTO A SPLIT SYSTEM. A MARINE PUSH WITH COOL AIR FOLLOWS THE FRONT CONTINUING EAST OF THE CASCADES THURSDAY NIGHT BUT WITHOUT STRONG GUSTY WINDS. LATE FRIDAY ANOTHER WEAKER MARINE PUSH OCCURS MAINTAINING THE COOL TREND. SATURDAY THROUGH MONDAY THERE WILL BE CLEARING BUT ONLY A SLIGHT INCREASE IN TEMPERATURES AS THE LONG WAVE TROUGH REMAINS NEAR 130W AND CLOSED LOW MEANDERS ABOUT. TUESDAY THE MRF BRINGS THE CLOSED LOW INTO THE BROOKINGS AREA. IF THIS IS CORRECT IT WOULD MEAN MORE CLOUDS AND SHOWERS. .MFR...NONE. MO
Hazardous weather outlook, Aug 4, 6:30 AM PDT, 10 hours 41 minutes before
ORZ021>031-CAZ080>085-051330- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MEDFORD OR 630 AM PDT SUN AUG 04 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN OREGON AND NORTHERN CALIFORNIA .DAY ONE...TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HESS
Nearby
Severe Thunderstorm Warnings in Oregon, 2003Every severe thunderstorm warning in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.