Alert archive / California / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 2, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jul 9, 2001, 6:23 PM PDT for Siskiyou County, California. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 9, 2001, 6:23 PM PDT (01:23 UTC)
- Expired
- Jul 9, 2001, 7:00 PM PDT
- In force
- 37 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 36 km from the middle of the area, began a volume at 01:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 1.4 hours before the alert went out and 69 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
- 614 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 3548 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KMFR 100126 SVRMFR CAC093-100200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 623 PM PDT MON JUL 9 2001 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL SISKIYOU COUNTY IN NORTHERN CALIFORNIA * UNTIL 700 PM PDT. * AT 614 PM PDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER CENTRAL SISKIYOU COUNTY...OR ABOUT 4 MILES SOUTHWEST OF YREKA...MOVING NORTH AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER GUNSIGHT PEAK AT 635 PM PDT NEAR GOTTVILLE ON HIGHWAY 96 AT 650 PM PDT IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY BUILDING AWAY FROM WINDOWS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. LAT...LON 4167 12273 4169 12264 4186 12267 4188 12279 $$ WOLF
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 Jul 9, 2:30 PM PDT, 3 hours 53 minutes earlier.
Area forecast discussion, Jul 9, 2:30 PM PDT, 3 hours 53 minutes before
SOUTHWEST OREGON/NORTHERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT MON JUL 09 2001 12Z ETA/MESOETA/NGM/AVN IN. THE OVERALL SYNOPTIC PATTERN THIS MORNING IS THE SAME AS IT HAS BEEN FOR THE PAST SEVERAL DAYS. A STRONG UPPER HIGH OVER OKLAHOMA WILL REMAIN NEARLY STATIONARY FOR A FEW MORE DAYS...AND A WEAK UPPER TROUGH WILL REMAIN OFF THE WEST COAST. THIS WILL MAKE FOR GENERALLY SOUTHERLY FLOW OVER SOUTHERN OREGON/NORTHERN CALIFORNIA AND THAT MEANS AFTERNOON/EVENING THUNDERSTORMS ARE A POSSIBILITY. THUNDERSTORMS HAVE DEVELOPED THIS AFTERNOON SOUTH AND JUST TO THE EAST OF THE FORECAST AREA. PLENTY OF CUMULUS HAVE FORMED OVER ALL OF THE FORECAST AREA FROM THE CASCADES EAST AND OVER SISKIYOU COUNTY. THUNDERSTORMS ARE A POSSIBILITY OVER ALL OF THIS AREA LATER THIS AFTERNOON...SO WILL ADD A CHANCE OF EVENING THUNDERSTORMS IN THOSE AREAS. SOME OF THE STORMS THAT FORM OVER THE SISKIYOUS MAY MOVE OUT OVER JACKSON AND JOSEPHINE COUNTIES...SO WILL ADD A SLIGHT CHANCE THIS EVENING THERE. TUESDAY AND WEDNESDAY LOOK GOOD FOR AFTERNOON/EVENING THUNDERSTORM ACTIVITY BECAUSE THE HEATING WONT HAVE TO DO IT ALONE THEN...THERE ARE SOME SHORT WAVES EMBEDDED IN THE SOUTHERLY FLOW THAT WILL MOVE OVER THE FORECAST AREA. THE OTHER FORECAST PROBLEM IS THE MARINE LAYER. AS EXPECTED...THE STRATUS HAS FILLED IN ALONG THE COAST. EXPECT THE COAST TO SEE LOW CLOUDS AND FOG EACH NIGHT WITH AFTERNOON CLEARING. INLAND PENETRATION WILL BE LIMITED TO THE COQUILLE AND WESTERN UMPQUA VALLEYS TONIGHT...BUT THE SHORT WAVE ACTIVITY DURING THE NEXT FEW DAYS WILL ALLOW THE LAYER TO THICKEN A BIT...SO EXPECT A GRADUAL INCREASE IN OVERNIGHT COVERAGE IN THE UMPQUA VALLEY. EXTENDED...THE STRONG HIGH OVER OKLAHOMA WILL RETROGRADE TO THE NEW MEXICO AREA BY THURSDAY AND THE TROUGH OFFSHORE WILL WEAKEN A BIT IN RESPONSE TO THE RIDGING. THIS WILL SHIFT THE FLOW ALOFT FROM SOUTH TO SOUTHWEST AND SHUNT THE THUNDERSTORMS OFF TO THE EAST. SO...THE ENTIRE EXTENDED PERIOD (THURSDAY THROUGH MONDAY) WILL BE DRY. EXPECT THE MARINE LAYER DEPTH TO INCREASE A BIT WITH STRONGER ONSHORE FLOW...SO OVERNIGHT LOW CLOUDS AND FOG WILL CONTINUE TO SPREAD IN THE UMPQUA AND POSSIBLY THE ROGUE VALLEYS. MOSTLY CLEAR SKIES ELSEWHERE. .MFR...NONE. OTH BB 052/065 053/065 053 150111 4BK BB 051/065 052/065 052 150111 RBG BB 057/089 057/084 054 151333 MFR BB 060/094 060/090 057 152444 LMT BB 051/087 051/084 049 153555 LKV BB 051/087 051/084 049 153555 MHS BB 053/089 053/085 051 153444
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 5:42 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 33 min |
| Jul 9, 7:17 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 28 min |
| Jul 9, 7:24 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 51 min |
| Jul 10, 3:56 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 34 min |
Nearby
Severe Thunderstorm Warnings in California, 2001Every severe thunderstorm warning in 2001
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; radar from the NEXRAD Level II archive.