Alert archive / Washington / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 3, NWS Spokane, WA
NWS Spokane, WA issued this severe thunderstorm warning at Apr 27, 2001, 3:47 PM PDT for Whitman County, Washington. It was in force for 28 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 27, 2001, 3:47 PM PDT (22:47 UTC)
- Expired
- Apr 27, 2001, 4:15 PM PDT
- In force
- 28 min
- Issued by
- NWS Spokane, WA
- Area
- Whole counties
County Whitman County, WA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 3:49 PM PDT | Hail 1.75 | Albion, WA | A single thunderstorm which moved north-northeast between Colfax and Pullman produced several reports of large hail. Golfball-sized hail at the Whitman County Landfill (4 SSW Albion) did extensive damage to the aluminum canopy on a truck there. A trained spo |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 10.8 hours before the alert went out and 123 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
- 128 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1116 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 178 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Spokane, WA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 27, 3:07 PM PDT, 40 minutes earlier.
Area forecast discussion, Apr 27, 3:07 PM PDT, 40 minutes before
EASTERN WASHINGTON AND NORTH IDAHO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPOKANE WASHINGTON 230 PM PDT FRI APR 27 2001 12Z ETA/AVN INITIALIZED WELL THIS MORNING BY OVERLAY W/IR SAT LOOP. CONVECTIVE PARAMETERS STILL LOOK PRETTY IMPRESSIVE OVER THE EXTREME EASTERN THIRD OF WASHINGTON AND THE ID PANHANDLE ZNS FOR LATE THIS AFTERNOON AND EVENING. DO LIKE THE SPEED AND STRENGTH OF THE AVN MODEL. HIGH LEVEL MOISTURE ALREADY STREAMING OVER THE CASCADES AND INTO THE CWA. CAPE VALUES WELL ABOVE 1000 J/KG COUPLED UP WITH GOOD 70H MOISTURE ADVECTION AND LIS OF -4 TO -6 DEPICT A VERY UNSTABLE LOWER ATMOSPHERE THIS AFTERNOON. WILL STILL KEEP FOCUS OF CONVECTION TO THE EXTREME SOUTHEAST PART OF CWA AND CENTRAL PANHANDLE MOUNTAINS ...ALTHOUGH MOST OF THE CWA WILL HAVE POTENTIAL FOR ISOLATED THUNDER THROUGH THIS EVENING. OFF SHORE UPPER TROUGH NOW ROTATING EAST AS UPPER SPEED MAX ROUNDING BASE OF TROUGH. CAA W/TROUGH TO BE THE MAIN PLAYER FOR REMAINDER OF SHORT TERM FORECAST PERIOD. WILL HANG ONTO LIKELY POPS TONIGHT AND SATURDAY MORNING PER PREVIOUS FORECASTS BEFORE CHANGING TO COOL/SHOWERY PATTERN AND SCATTERED POPS IN THE AFTERNOON AS TROUGH AXIS MOVES THROUGH CWA. FLOW BECOMES ZONAL BY SAT NGT CUTTING OFF SHOWER THREAT FOR EAST SLOPE ZNS AND BASIN. NEXT PACIFIC SHORT WAVE NEAR THE DATELINE IS SUPPORTED BY A 160+ KT JET AND WILL RAPIDLY EJECT/KICK OUT SATURDAYS SHORTWAVE. SNOW LEVELS WILL QUICKLY DROP TO NEAR 5000 FEET SATURDAY AND SATURDAY NIGHT BEFORE MODERATING SUNDAY. SURFACE WINDS WILL PICK UP INTO THE BREEZY CATEGORY ALONG THE CASCADES EAST SLOPES AND BASIN SATURDAY AFTERNOON AND NIGHT. GDB .EXTENDED...A LOW PRESSURE TROUGH MOVES OVER THE AREA MONDAY AND TUESDAY FOR A CHANCE OF SHOWERS BOTH DAYS. THEN A WEAK RIDGE BUILDS IN FOR WEDNESDAY. THIS SHOULD BRING IMPROVING WEATHER STARTING IN THE WEST WEDNESDAY AND SPREADING TO THE IDAHO PANHANDLE ON THURSDAY. WILL BRING A CHANCE OF SHOWERS BACK IN FOR THE WESTERN PORTION OF THE AREA WEDNESDAY THEN FOR THE EAST ON FRIDAY. LH THE INFORMATION IN THIS PRODUCT CONCERNING WARNINGS AND FORECASTS IS VALID ONLY AT THE TIME OF ISSUANCE. THE LATEST WARNING AND FORECAST INFORMATION WILL BE FOUND IN THE APPROPRIATE PRODUCTS... GEG 043/064/039/062 6633 CQV 041/066/037/064 7753 SPT 042/064/038/062 7753 COE 041/063/038/061 6644 WWP 040/054/036/052 7754 LWS 050/068/047/065 7632 PUW 045/063/045/063 7632 EAT 045/066/042/066 4411 MWH 048/068/044/068 4411 .GEG...NONE.
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 4:38 PM PDT | Severe Thunderstorm Warning | OTX | Whitman | 37 min |
Nearby
Severe Thunderstorm Warnings in Washington, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.