Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 101, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1993, 7:27 PM CDT for Webster County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1993, 7:27 PM CDT (00:27 UTC)
- Expired
- Jun 29, 1993, 8:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Webster County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.5 hours before the alert went out and 219 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
- 3751 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 16.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 300028 SVRDSM IAC187-300100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 727 PM CDT TUE JUN 29 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)... IN CENTRAL IOWA ...NORTHERN WEBSTER COUNTY AT 625 PM CDT...RADAR SHOWED A SEVERE THUNDERSTORM 15 TO 20 MILES NORTHWEST OF FORT DODGE...BETWEEN GILMORE CITY AND PIONEER. THIS STORM WAS MOVING SOUTHEAST AT 40 MILES AN HOUR...AND WILL BE AFFECTING THE COMMUNITIES OF FORT DODGE...CLARE...BADGER...AND VINCENT BY 750 PM. THIS THUNDERSTORMS HAD ALSO PRODUCED BRIEF TORNADO TOUCHDOWNS IN POCAHONTAS COUNTY JUST AFTER 7 PM...AND COULD DO THE SAME AS IT MOVES THROUGH WEBSTER COUNTY...SO YOU SHOULD SEEK STURDY SHELTER AND STAY INSIDE UNTIL AFTER IT PASSES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITONS. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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.
In the hours before
Special weather statement, Jun 29, 6:22 PM CDT, 1 hour 5 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 622 PM CDT TUE JUN 29 1993 ...SHOWERS AND THUNDERSTORMS CONTINUE IN NORTHEAST IOWA... AT 615 PM THUNDERSTORMS WERE OCCURRING THROUGHOUT NORTHEAST IOWA FROM I-35 TO HIGHWAY 63. THESE STORMS WERE MOVING EAST AT 30 MPH AND WILL AFFECT THE WATERLOO/CEDAR FALLS...CHARLES CITY AND NASHUA AREAS THROUGH 645 PM. NO SEVERE WEATHER HAS BEEN REPORTED WITH THIS AREA OF STORMS. NOTE: A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA UNTIL 11 PM. ALSO...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR HANCOCK COUNTY UNTIL 7H PM...MORE INFORMATION ON THIS PARTICULAR STORM FORTHCOMING IN A "SEVERE WEATHER STATEMENT". COLLAR
Special weather statement, Jun 29, 6:22 PM CDT, 1 hour 5 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 622 PM CDT TUE JUN 29 1993 ...SHOWERS AND THUNDERSTORMS CONTINUE IN NORTHEAST IOWA... AT 615 PM THUNDERSTORMS WERE OCCURRING THROUGHOUT NORTHEAST IOWA FROM I-35 TO HIGHWAY 63. THESE STORMS WERE MOVING EAST AT 30 MPH AND WILL AFFECT THE WATERLOO/CEDAR FALLS...CHARLES CITY AND NASHUA AREAS THROUGH 645 PM. NO SEVERE WEATHER HAS BEEN REPORTED WITH THIS AREA OF STORMS. NOTE: A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA UNTIL 11 PM. ALSO...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR HANCOCK COUNTY UNTIL 7 PM...MORE INFORMATION ON THIS PARTICULAR STORM FORTHCOMING IN A "SEVERE WEATHER STATEMENT". COLLAR "@JF.66WWUS t#6WWUSv N6WWUSD tWWUSP WUUS 76WWUS8 7`WWUS^ :a`WWUS 36WWUS . `WWUS @"s`WWUS 0XWSUS = WUUS `WWUS 6WWUSZ <WWUS P ; WUUS0 qWWUS `3U^WSUS T7q4WSUSZ 6WWUS |6WWUS <JJJ**lll~ WUUS@ q6WWUS $iX WUUS LA`WWUS q6WWUS 4LLL[I6WWUS< r*H WUUSL PI`WWUSR TP6WWUSd M`WWUS$ `i`WWUS R WUUS XWOUS sF6WWUSH w WUUS n I`WWUS jI WUUS o6WWUS` xS6WWUS tWWUS 8fWWUS
Special weather statement, Jun 29, 6:43 PM CDT, 44 minutes before
IAZALL-300040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 630 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND EXTENDING FROM 25 MILES SOUTHWEST OF SPENCER NEAR CHEROKEE...TO 20 MILES NORTHWEST OF MASON CITY. OTHER INTENSE STORMS WERE LOCATED 15 MILES SOUTHEAST OF MASON CITY...AND 25 MILES EAST OF MASON CITY NEAR CHARLES CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND NEARLY CONTINUOUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS NORTH OF A LINE FROM 20 MILES NORTHEAST OF SIOUX CITY NEAR LE MARS...TO NEAR WATERLOO. SCATTERED SHOWERS AND A FEW THUNDERSTORMS WERE ALSO OCCURRING IN A 30 MILE WIDE BAND FROM 30 MILES WEST OF WATERLOO NEAR ACKLEY...TO 15 MILES NORTHWEST OF OTTUMWA NEAR OSKALOOSA. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
Special weather statement, Jun 29, 6:43 PM CDT, 44 minutes before
IAZALL-300040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 630 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND EXTENDING FROM 25 MILES SOUTHWEST OF SPENCER NEAR CHEROKEE...TO 20 MILES NORTHWEST OF MASON CITY. OTHER INTENSE STORMS WERE LOCATED 15 MILES SOUTHEAST OF MASON CITY...AND 25 MILES EAST OF MASON CITY NEAR CHARLES CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND NEARLY CONTINUOUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS NORTH OF A LINE FROM 20 MILES NORTHEAST OF SIOUX CITY NEAR LE MARS...TO NEAR WATERLOO. SCATTERED SHOWERS AND A FEW THUNDERSTORMS WERE ALSO OCCURRING IN A 30 MILE WIDE BAND FROM 30 MILES WEST OF WATERLOO NEAR ACKLEY...TO 15 MILES NORTHWEST OF OTTUMWA NEAR OSKALOOSA. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
Special weather statement, Jun 29, 7:00 PM CDT, 27 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 700 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ACROSS NORTH CENTRAL AND NORTHEAST IOWA WERE PRODUCING VERY HEAVY RAINS... AT 700 PM STRONG THUNDERSTORMS WERE MOVING INTO THE MASON CITY METRO AREA. THESE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINS... HAIL...GUSTY WINDS 35 TO 40 MILES AN HOUR AND LIGHTNING. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WILL AFFECT THE MASON CITY METRO AREA AS WELL AS NORTHWOOD...MANLY AND CLEAR LAKE AREAS. GENERAL THUNDERSTORMS DOTTED THE REST OF NORTH CENTRAL AND NORTHEAST IOWA WEST OF HIGHWAY 150. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. A TORNADO WATCH IS IN EFFECT UNTIL 11PM FOR ALL OF NORTH CENTRAL AND NORTHEAST IOWA. THIS IS A DANGEROUS WEATHER SITUATION AND MUST BE MONITORED CLOSELY. PEOPLE SHOULD TUNE IN THE RADIO...TV AND WEATHER RADIO FOR THE LATEST STORM INFORMATION. RR
Special weather statement, Jun 29, 7:08 PM CDT, 19 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 700 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ACROSS NORTH CENTRAL AND NORTHEAST IOWA WERE PRODUCING VERY HEAVY RAINS... AT 700 PM STRONG THUNDERSTORMS WERE MOVING INTO THE MASON CITY METRO AREA. THESE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINS... HAIL...GUSTY WINDS 35 TO 40 MILES AN HOUR AND LIGHTNING. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WILL AFFECT THE MASON CITY METRO AREA AS WELL AS NORTHWOOD...MANLY AND CLEAR LAKE AREAS. GENERAL THUNDERSTORMS DOTTED THE REST OF NORTH CENTRAL AND NORTHEAST IOWA WEST OF HIGHWAY 150. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. A TORNADO WATCH IS IN EFFECT UNTIL 11PM FOR ALL OF NORTH CENTRAL AND NORTHEAST IOWA. THIS IS A DANGEROUS WEATHER SITUATION AND MUST BE MONITORED CLOSELY. PEOPLE SHOULD TUNE IN THE RADIO...TV AND WEATHER RADIO FOR THE LATEST STORM INFORMATION. RR
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:05 PM CDT | Tornado Warning | DMX | Humboldt, Pocahontas | 25 min |
| Jun 29, 7:18 PM CDT | Flash Flood Warning | DMX | Kossuth, Palo Alto, Pocahontas | 3 hr |
| Jun 29, 7:26 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago | 24 min |
| Jun 29, 7:34 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 26 min |
| Jun 29, 8:01 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Humboldt, Webster, Wright | 29 min |
| Jun 29, 8:17 PM CDT | Tornado Warning | DMX | Calhoun, Greene | 28 min |
| Jun 29, 8:23 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 52 min |
| Jun 29, 8:38 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 37 min |
| Jun 29, 8:44 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Grundy | 46 min |
| Jun 29, 8:44 PM CDT | Tornado Warning | DMX | Calhoun | 31 min |
| Jun 29, 8:50 PM CDT | Tornado Warning | DMX | Boone, Greene | 25 min |
| Jun 29, 8:53 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 52 min |
| Jun 29, 8:57 PM CDT | Tornado Warning | DMX | Crawford | 33 min |
| Jun 29, 9:01 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Sac | 29 min |
| Jun 29, 9:20 PM CDT | Tornado Warning | DMX | Jasper, Polk, Story | 25 min |
| Jun 29, 9:25 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan, Fayette | 65 min |
| Jun 29, 9:28 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 32 min |
| Jun 29, 9:36 PM CDT | Severe Thunderstorm Warning | DMX | Benton, Tama | 54 min |
| Jun 29, 9:37 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Jasper, Polk | 68 min |
| Jun 29, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 26 min |
| Jun 29, 10:00 PM CDT | Tornado Warning | DMX | Jasper, Polk | 26 min |
| Jun 29, 10:15 PM CDT | Flash Flood Warning | DMX | Boone | 96 min |
| Jun 30, 12:21 AM CDT | Flash Flood Warning | DMX | Decatur, Ringgold | 66 min |
| Jun 30, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 29 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning in 1993
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.